Vincent SP-332 Hybrid Stereo Power Amplifier Instructions

Instructions for use
SP-332
Hybrid-Stereo-Endverstärker
Hybrid Stereo Power Amplifier

**SAFETY GUIDELINES

**

This appliance was produced under strict quality controls. It complies with all established international safety standards. Nonetheless, the following instructions should be fully read and observed in order to prevent any hazard:
Do not open the appliance! Risk of electric shock!
There are no parts in the appliance that requires maintenance by the user.
Maintenance/Alterations
All equipment that is connected to the domestic mains voltage can be dangerous to the user if not handled properly. Leave maintenance work to qualified professionals. The product is only permitted for connection to AC 230Volt/50Hz, for earthed sockets and use in enclosed areas. Altering the product or manipulating its serial number voids the warranty. After a fault, leave the appliance’s fuse to be replaced only by a professional with one of the same kind.
Power Cable Connection
Always pull the plug and never the power cable if you want to disconnect the appliance from the mains power. Make sure when setting up the appliance that the power cable is not squashed, severely bent or damaged by sharp edges. Do not touch the power lead with wet or damp hands. Use the power cable supplied or another one from Vincent.
Switching Off
Switch the appliance off every time before you connect or remove other components or loudspeakers,  disconnect or connect it to the mains power, leave it unused for a longer period or want to clean its outside. On all amplifiers and receivers, wait approx.  1 minute after this before disconnecting or reconnecting the cable.
Moisture/Heat/Vibration
Contact of electrically operated equipment with liquids, moisture, rain or water vapor is dangerous for such equipment and the user and must be avoi- ded without fail. Take care that no liquids or objects get inside the appliance (ventilation slots etc.). It must be disconnected from the main power immediately and examined by a professional if this
happens. Never expose the appliance to high temperatures (direct sunshine) or strong vibration.
Heat Build-up
Make sure that a gap of 5 cm remains around the appliance and that the surrounding air can circulate (do not install in enclosed cupboards). Vents must not be covered up.
Volume
The maximum tolerable volume is always reached well below the maximum possible setting on the amplifier. Be careful with the volume setting, therefore, in order to prevent damage to hearing. So that you do not expose yourself to high volumes unintentionally, always set to a low level before changing the input channel.
Cleaning
Pull out the power plug before cleaning the outside of the product. Whenever possible, use a soft, lintfree cloth that has been dampened. Do not use abrasives, solvents, thinners, flammable chemicals, polishes and other cleaning products that leave marks.

OTHER INSTRUCTIONS

Setting up the appliance
How the system is set up has an effect on the sound quality. Therefore only place it on a suitable, stable surface.
To make the most of your system’s sound quality, we recommend placing the equipment on Vincent racks and not putting them on top of each other.
Old electronic equipment
This appliance is subject to the conditions set out in the European Directive 2012/19/EC. This is identified by the symbol of a crossed-out waste bin on the appliance.
What this means for you as a consumer: All old electrical and electronic equipment that is no longer used must be disposed of separately from domestic waste using places provided by the authorities. By doing so you can prevent damage to the environment and help to encourage manufacturers to produce more durable or reusable products. For further information about disposing of your old appliance, please consult your local  authority, waste disposal agency or the shop where you bought the product.
CE sign
This appliance complies with the current EU directives about attaining the CE mark and thus meets the requirements for electrical and electronic equipment (EMC regulations, safety regulations and regulations for low voltage equipment).
Declarations
This document is a product of Sintron Distribution GmbH, 76473 Iffezheim and may not be copied or distributed partly or in full without express, written consent. Vincent is a registered trademark of Sintron Distribution GmbH, 76473 Iffezheim. Vincent works continually to improve and develop its products. Therefore, the appearance and technical design of the appliance are subject to changes, as long as they are in the interest of progress. The content of these instructions is for information purposes only. It can be changed at any time without prior notice and does not constitute any obligation on the part of the trademark’s owner. The latter assumes no responsibility or liability for errors or inaccuracies, which may be included in these operating instructions.
Storage of the packaging
We strongly recommend that you keep the original packaging in case you need to transport the equipment again at a later date. Transport damages are mainly caused by improper packaging of the HiFidevices. Because the original packaging fits the equipment accurately it will reduce the risk of damage if the transport is necessary.
Explanation of the symbols
The lightning bolt tells you that dangerous voltages are present in the appliance, which can cause an electric shock.
This symbol brings your attention to particularly important information regarding operation and maintenance.
This symbol identifies useful information and advice about how to handle the appliance.

**INCLUDED IN DELIVERY

**

Please check the contents of the packaging, which in addition to the appliance should contain the following accessories:

• 1 power cable
  

• this manual

DESCRIPTION OF THE APPLIANCE

Although Vincent also manufactures long-lasting and high-class components for multi-channel audio units and home cinemas, Vincent’s developers feel especially dedicated to the stereo tradition. In this segment in particular, the progress in sound that a separation into preamplifiers and main amplifiers brings is apparent. We think that it is precisely the use of all-too price- conscious design in preamplifiers and main amplifiers that undermines these efforts with lower sound quality resulting from compromises. For this reason, Vincent does not manufacture entry-level models for stereo preamplifiers and stereo main amplifiers. This also makes sense because irrespective of any development in the audio market and irrespective of what kind of audio system is to be built, there is one category of devices whose components can continue to be used in any system put together in the future: the main amplifiers! That is because it doesn’t matter what the data media or data formats of the future are, the sound will always have to find its way to the loudspeaker. The SP-332 combines with its hybrid design the advantages of tube and transistor amplification. The result of extensive development and strict component selection is a power amplifier not only with little sound competition but never losing control in the various connection alternatives in combination with all speakers. The highest manufacturing quality and excellent value for money can be taken for granted. The SP-332 is an enhancement of the power amplifier SP-331, which upgrades it by higher quality inputs at the rear and dual speaker outputs, which can be switched on and off individually. A stereo preamplifier (SA-32 or SA-31MK) can be placed by its side. In combination with CD players, DVD players, tuners, the HiFi furniture and speaker cables from our product range, one can build the most diverse, perfectly harmonious systems.

FRONT VIEW

1. POWER
   This is the main power switch for turning on and off the device. The amplifier is separated from the mains voltage when switched off and cannot be set into a standby state.

2. VU-Meter
   These displays show the range in dB and the direct voltage generated out of the music signal. This voltage is in accordance with your loudness sensation.

3. SPEAKER A/B: Buttons to activate/ deactivate the two speaker pairs
   If suitable speakers are used, a second speaker pair may be used simultaneously. With this switch, you can turn loudspeaker outputs A and B on and off separately. The LED next to the button indicates the active speaker pair.
   REARVIEW

4. SPEAKERS: Loudspeaker terminals At these output sockets with threaded terminals one or two pairs of loudspeakers can be connected. A Speaker cable with 4 mm banana plugs can be used. Please take note of the information given in the section “Installation”, if two pairs of loudspeakers will be connected to the amplifier.

5. INPUT: Input for preamplified mono audio signal  One connector type of this input (RCA or XLR) must be connected with the output connectors of the preamplifier for the desired channels. For example, connected with “PRE OUT R” and “PRE  OUT L”, if the SP-332 is to be used for the loudspeakers of a stereo system. Only one of the two input connector types can be used at any time. The setting “XLR/RCA” (10) must be chosen correctly. Do not connect any line-level sources!

6. POWER CONTROL (12V) OUTPUT
   These jack connectors (3,5 mm) send the signals for the standby control (12V Trigger).

7. COLOUR VU-METER For changing the color of the VU-Meter.
   The position of this switch affects the color displayed in the VU-Meter

8. Voltage Selector: The voltage selector behind the pane allows switching the voltage from 230 V to 110 V.
   Refer to safety instructions for further information (p. 30, “Switching the Voltage”)

9. AC 220-240V: Power Connector
   To establish the power supply, connect the plugs of the power cable to the device and to a 230V AC wall outlet. The small plastic housing beneath the plug opening holds the fuse. Refer to the security precautions.

10. SELECTOR: XLR/RCA
    Here you can select which of the two input connector types at the rear of the unit, RCA or XLR is used.

INSTALLATION

Set up the cable links in a sequence as follows. Connect the power cable between the device and power supply only after all other connections have been made.
DURING INSTALLATION PLEASE OBSERVE THE FOLLOWING ADVICE:

Protective caps
Prior to the first installation, the protective plastic caps must be removed from all the connections used at the rear of the unit.

RCA connections
Make sure that you do not mix up the analog inputs for right and left. The RCA plugs for these are mostly color coded as follows: red for the right channel, black or white for the left channel. Contacting the middle pin of the RCA plugs with the outer ring of the RCA chassis jack may lead to damage to the main amplifier if it is switched on!
To avoid this hazard, connect or disconnect only in a switched-off state and more than one minute after deactivating!
Speaker cable connections
The use of ready-made loudspeaker cables is recommended instead of connecting the cable’s central wire (strand) directly to the terminals. Banana plugs or cable lugs ensure high security from short-circuits and damage to loudspeakers or amplifiers. Ensure that bare loudspeaker wires are never able to come into contact with each other or with the metal on the back of the housing. Make sure that the positive and negative loudspeaker wires are connected correctly. You will notice a reduced sound quality if the connections are the wrong way round. Only use loudspeakers with a nominal impedance of at least 4Ω. If you use a loudspeaker cable equipped with 4mm banana plugs you are required to remove the small plastic plugs located in the connector holes of the speaker clamps when first installing this main amplifier in your system.
XLR connections
Please note that European and US-American XLR signal assignments for the connector pins are different. This Vincent preamplifier uses the European system following the standard AES14-1992. The cable structure is the same in any case. As long as both the preamplifier and the power amplifier satisfy the same standard, the signal connection is correct. This is always the case if both units were made by Vincent. If two units from different standards are connected, this inverts the signal. In this case the signal assignment on one side of the connection has to be changed. Your audio specialist dealer will support you with this.

1. USA System (Pin 2 = COLD, Pin 3 = HOT) US System
2. Europäisches System (Pin 2 = HOT, Pin 3 = COLD) European System

Cable connections
Make sure that all plugs fit tightly. Inadequate connections can cause noise interference, failures, and malfunctions.

To make the most of the components’ sound potential, only high-quality loudspeakers and connecting cables, for example, Vincent cables, should be used. Your local stockist ill be glad to advise you  about this.
CONNECTING THE PREAMPLIFIER
This main amplifier is equipped with a stereo audio input “INPUT” (7) on which the unit awaits the preamplified signal of two audio channels (for example “R” and “L” or “FRONT R” and “FRONT L”). This is the audio information that the SP-332 provides for one or two pairs of loudspeakers.
Attention: No source with a standard line level signal (“LINE OUT”) must be connected to this input. It is only intended for preamplified signals (e.g. “PRE OUT”).
This audio input is equipped with two pairs of connectors with which the preamplifier can be connected as desired by means of either the RCA or XLR connectors. If your preamplifier offers both options, XLR is preferable. Only one of the two types of connectors may be used for playback at any given time. The setting of the switch “XLR/RCA” (10) determines which connector is currently used as the input. If the SP-332 is to be supplied with both channels of a stereo preamplifier, connect the input sockets on the rear panel with preamplifier output sockets that are usually labeled “PRE OUT R” and “PRE OUT L”.
Use either an RCA connection

and/or an XLR connection.

Both “INPUT” inputs (RCA and XLR) can be connected to preamplifiers at the same time and in this way it is possible to connect two preamplifiers simultaneously and toggle between the desired “INPUT” modes. Make sure the volume of the respective preamplifier is not set too high before switching over. It is allowed to switch between the inputs even while music is being played back. If the SP-332 is used in a multi-channel system, then the connection sockets of the desired channels in the connection field of the decoder preamplifier usually named “AUDIO OUTPUT” are to be connected to the input of this main amplifier.
CONNECTIONS FOR THE STANDBY CONTROL (POWER CONTROL)
Many AV-Systems consist of a multitude of individual components. To avoid the necessity of switching them on and off before and after every use, many manufacturers have equipped their devices with what is known as a “POWER CONTROL” circuit or “TRIGGER”. This kind of remote-controlled standby circuit is used primarily for preamplifiers and power amplifiers. Particularly for preamplifiers and main amplifiers, this kind of remote standby control is utilized, as power amplifiers are often placed far from other devices near the speakers. To employ these functions, direct or indirect cable connections must be made between the preamplifier (or integrated amplifier) and all the devices which support this function. The “POWER CONTROL” function operates in such a way that each switching on or off of one device in the system (usually the preamplifier) automatically brings about the switching on or off of all the connected devices which support this function. Please keep in mind that all devices which respond to the power control are not disconnected from the mains network when switched off.
They are set to a standby state instead. For connecting cables, two-core cables with 3.5 mm jack plugs (mono) are used. For each connection between two devices one of those cables is needed. If you don’t wish to use this function or if the other components do not support it, all you have to do is leave out these cable connections. The SP-332 is equipped with two output connectors for power control. Here, the switching signal generated by the amplifier is available for other components of the system. Two HiFi components that are able to react to the power control signal can be connected directly to the amplifier’s power control outputs (6). If more than two devices, which can be controlled, are to be connected, then it is necessary to make the power control connection between the amplifier and these further devices through the outputs of the two devices which are connected directly. For that reason, every HiFi component that accepts power control signals is also equipped with a power control output. Thus, in theory it is possible to provide an infinite number of HiFi components with the power control signal. This approach, to loop a signal through a chain of components, is commonly referred to as “daisy chaining”.

Many devices which can be controlled by a switching signal (not preamplifiers or integrated amplifiers), have two terminals that do not differentiate between input and output. In this case, either of the two can be selected.
“POWER CONTROL” sockets of preamplifiers or integrated amplifiers must not be interconnected! All receiving devices must not be connected to more than one preamplifier or integrated amplifier (directly or indirectly)!
CONNECTION OF THE LOUDSPEAKERS
You can connect one or two pairs of loudspeakers to the power amplifier SP-332. For each speaker, the unit provides two speaker terminals (positive + and negative -), each of which is connected to a pair of 2-core speaker cables. At the loudspeaker connection terminal, there are similar connector screws or connectors. There, the polarity of each screw (+ or -) can be identified as well and the other side of the speaker cable associated with this loudspeaker must be attached. Make sure only connector screws of the same polarity will be connected by each speaker cable wire: a knob marked “+” in the amplifier’s terminal must be connected with a speaker’s connector screw marked “+” as well.

If every speaker is connected in a conventional way (a two-core speaker cable for each loudspeaker) and you own loudspeakers that are equipped with Bi- Wiring terminals (four connector screws) you have to make sure that the metal brackets (contact pieces consisting of small metal plates or short pieces of cable which are supplied with the speakers) are applied to the terminal and that each one connects the two knobs of the same polarity (e.g. both connectors marked “+”). The connector screw labeled “SPEAKER A”, “+” and “R” at the amplifier’s backside must be connected to one of the bridged, labeled “+” and “R” connectors of the loudspeaker. Accordingly, the neighboring connector screw labeled “SPEAKER A”, “-” and “R” at the amplifier’s backside must be connected to one of the bridged, labeled “-” and “R” connectors of the loudspeaker. Make a corresponding connection between the left speaker and the power amplifier. Additionally, the speaker connector “A” must be activated at the front panel button “SPEAKER A” (3). If the second pair of loudspeakers is to be connected, then the clamps in the bottom row of the output terminals “SPEAKER B” are connected in a similar fashion to the additional loudspeaker. This loudspeaker pair is activated by switching on the “SPEAKER B” button (3) on the front of the unit. However, this is only permitted if both loudspeakers have a nominal impedance of at least 8Ω! CONNECTION OF THE LOUDSPEAKERS
If a loudspeaker is to be connected with “bi-wiring”, both pairs of loudspeaker clamps may be used at the same time. In contrast to the connection of the loudspeakers with one loudspeaker cable each, with bi-wiring, a suitable loudspeaker is connected via two separate two-wire loudspeaker cables or one four-wire loudspeaker cable to the pair of output clamps on the main amplifier. This doubles the cabling required but for many combinations of loudspeakers and amplifiers, this improves the sound quality. Please note,
that in this case both speaker outputs (“SPEAKER A” and “SPEAKER B” (3)) must be activated.

If every speaker is connected in a conventional way (a two-core speaker cable for each loudspeaker) and you own loudspeakers that are equipped with Bi- Wiring terminals (four connector screws) you have to make sure that the metal brackets (contact pieces consisting of small metal plates or short pieces of cable which are supplied with the speakers) are applied to the terminal and that each one connects the two knobs of the same polarity (e.g. both connectors marked “+”). The connector screw labeled “SPEAKER A”, “+” and “R” at the amplifier’s backside must be connected to one of the bridged, labeled “+” and “R” connectors of the loudspeaker. Accordingly, the neighboring connector screw labeled “SPEAKER A”, “-” and “R” at the amplifier’s backside must be connected to one of the bridged, labeled “-” and “R” connectors of the loudspeaker. Make a corresponding connection between the left speaker and the power amplifier. Additionally, the speaker connector “A” must be activated at the front panel button “SPEAKER A” (3). If the second pair of loudspeakers is to be connected, then the clamps in the bottom row of the output terminals “SPEAKER B” are connected in a similar fashion to the additional loudspeaker. This loudspeaker pair is activated by switching on the “SPEAKER B” button (3) on the front of the unit. However, this is only permitted if both loudspeakers have a nominal impedance of at least 8Ω! CONNECTION OF THE LOUDSPEAKERS
If a loudspeaker is to be connected with “bi-wiring”, both pairs of loudspeaker clamps may be used at the same time. In contrast to the connection of the loudspeakers with one loudspeaker cable each, with bi-wiring, a suitable loudspeaker is connected via two separate two-wire loudspeaker cables or one four-wire loudspeaker cable to the pair of output clamps on the main amplifier. This doubles the cabling required but for many combinations of loudspeakers and amplifiers, this improves the sound quality. Please note,
that in this case both speaker outputs (“SPEAKER A” and “SPEAKER B” (3)) must be activated.

Before changing the system to bi-wiring, the metal bridges fitted to the loudspeaker’s double connector in normal operation must be removed. Only loudspeakers with these bi-wiring terminals are suitable. Filtering of the entire frequency range occurs in the now separated loudspeaker crossover networks. One cable is to be connected to the loudspeaker’s sockets provided for the higher frequencies (treble) and the other with the ones for the lower frequencies (bass) for each loudspeaker. Make sure that the polarity is correct. Your specialist dealer will provide you with advice and assistance.
If you are using ready-made loudspeaker cables with 4 mm banana plugs, all you need to do is connect the two plugs on each loudspeaker cable end to the two associated speaker connectors. Turn the connector screws clockwise to fasten them.

If you want to use speaker cables equipped with spade lug connectors, every connector screw must be opened by turning counterclockwise. After that, the lug must be moved under the screw head. Then, turn the screw clockwise to fasten the lug to the connector. To avoid damage to the amplifier, make sure the connection is tight and no bare metal from the cable lug connector makes contact with the rear panel or with another terminal.

CONNECTION OF THE LOUDSPEAKERS

If no connector is to be used, remove approximately 1 cm length of insulation from each end of the speaker wire.
Twist the braid in order to avoid short circuits. Turn the fastener on the loudspeaker terminal counterclockwise to loosen it and introduce the bare wire end into the exposed onnector hole. Then turn the fastener clockwise so that the wire is firmly clamped. Make sure the connection is pretty tight.

Attention: If you intend to connect two speakers, both loudspeakers must have a nominal impedance of at least 8Ω. If only one speaker is used, every type of loudspeaker with a minimal nominal impedance of 4Ω can be utilized.
Considering correct polarity, the positive contact is mostly marked red or with “+”. The side of the speaker cable that has to be connected with the positive socket has a marking.
CONNECTION OF THE POWER CABLE
Check that the electricity supply to your home is appropriate to the device. The required voltage and frequency can be read on the back of the device beside the socket for the mains. If the electricity supply is appropriate, push the inlet connector of the supplied mains cable firmly into the socket for the mains on the back of the device. Connect the other end of the mains cable to a mains socket.
SWITCHING THE VOLTAGE
This device is equipped with a switch (8) that can be used to change the country-specific voltage from 230 V to 110 V.
Please never actuate the switch during operation! The voltage must only be switched by a technician since the device fuse must also be replaced after the actuation of the switch!
Information about the device fuse can be found on the back of the device.
Unauthorized actuation of the switch will void any warranty claim!

OPERATING THE APPLIANCE

button at the front panel. When switched off, the device is disconnected from the mains. As a precaution, before switching on, the volume setting of the preamplifier should be reduced. After switching on, the LED “POWER” on the front panel is blinking for about 30 seconds. In this time the tubes are being warmed up and the loudspeakers are muted.
Activate or deactivate each pair of connected loudspeakers separately| SPEAKER A SPEAKER B (3)| For music playback, at least one speaker pair must be connected (preferably at outputs “A”). The used outputs must be activated via the “SPEAKER” buttons (3) (LED lights up). Activation of the second output (“B”) is only necessary, if two speaker pairs are connected or one speaker pair in bi-wiring.
Select an input| XLR/RCA (10)| Here you can select it the power amplifier is provided with the preamplified input signal at the XLR or the RCA connectors at the rear of the unit. If the key is in its switched-on position, the SP-332 cannot process a signal connected to the RCA connector but expects the signal via the XLR connector. It is allowed to use this switch even while music is being played back.

TIPS

Burn in/ Warm-up
Your audio components need a certain time period until they reach maximum performance.
The duration of this “warm-up “ time is very different for the various elements of your audio system.
Higher and homogeneous sound quality is achieved while keeping the device switched on.
Your audio specialist dealer has enough experience to give you more information.

Net frequency noise
Some audio source devices may in combination with the amplifier cause a humming noise at power line frequency audible from your speakers. Usually, its volume varies with the volume setting of the amplifier. This is no sign of a defect or fault of your audio products but has to be eliminated. Generally, every wall-powered device connected to the ground wire of the power plug can cause this problem when connected to the amplifier. Experience shows that this problem is mainly caused by antenna-connected components (as TV set Tuners), personal computers, electrostatic loudspeakers, subwoofers, record players orheadpho-ne amplifiers that are connected to the audio
inputs of the amplifier. Another possible reason for humming noise is electromagnetic interference of other components’ power supplies with pick-up systems of record players (change the place of the record player for a test).
In most electric devices the ground potentials of all signals are connected to each other at one central point, where they have one common connection. If the device uses the protective conductor of the wall outlet, the corresponding wire of the line cord is connected intractably to the metal housing of the device. This is mostly the point where the central grounding point is attached to. By doing this the housing is able to shield all signals from external radiated noise. Some main amplifiers are equipped with a “Ground Lift” switch. If it is activated, the ground potential of the chassis and the protective ground wire are separated from the central signal ground point. The protective ground
wire keeps its function. Sometimes this helps prevent noise caused by errors in grounding. If the problem occurs and cannot be solved by yourself your audio specialist dealer will help you.

SEARCH FOR ERRORS

Unit does not work after pressing the
power button| The Mains cable is not connected to a suitable
mains wall outlet. The Mains cable has not been firmly inserted into wall power socket and the device’s socket. Otherwise, it may be defective. Unit fuse or unit is defective.| Connect to a functioning socket using a suitable mains
voltage. Check the power cable. If necessary, exchange it with a suitable mains cable and push its plug firmly into wall socket and the device’s power connector. Contact your dealer.
No sound on both channels although the unit is ready for use (LED (3) is lit)| The audio source currently selected at the preamplifier is giving no signal. The output of the source device is not connected or is wrongly connected e.g. not connected to the selected input channel terminal of the preamplifier. Wrong input channel has been selected at the preamplifier.
Volume setting of the preamplifier is set too low.
The preamplifier has been muted (MUTE-Function). Output of the preamplifier not connected or incorrectly connected to the input connectors of the SP-332. The setting of the toggle switch “XLR/RCA” (10) on the front panel is not correct. The speaker cable is not properly connected to the main amplifier’s terminals (5) or is defective.| Switch on the source unit and begin playback.
Correct the connection.
Set the preamplifier to the input that your desired source is connected to. Carefully increase the volume of the preamplifier. Deactivate the MUTE function at the preamplifier after, as a precaution, reducing the volume level.
Correct the connection to the preamplifier. Reduce the volume setting of the preamplifier and set the selector to the correct input.
Check and tighten the speaker cables at the main amplifier (5) and at the speakers.
No audio playback on one channel| The source equipment is giving a signal on only
one channel. One of the signal cables between audio source and preamplifier inputs has not yet
been plugged in or is defective.
The channel balance is in a wrong setting at the preamplifier. One of the loudspeaker cables or one of the signal cables between pre and main amplifier is not correctly connected or it is faulty.| Check the audio source. You can try to use it at a different amplifier for a test. Check the cable connections, tighten them if necessary.
Set the difference in channel volume  (“BALANCE” or “CHANNEL”) of the pream- plifier to the desired setting.  Check all the connections of the main amplifiers and whether the loudspeakers are working.
Poor sound quality| The cable connections are not tight, the connectors are dirty or the cable is defective.
A record player has been connected to a line level input of the preamplifier without using a phono preamplifier. An audio source with standard line level output (example: CD player) is connected to the power amplifier’s direct input “INPUT” (5). One speaker pair is connected in bi-wiring, but not both speaker outputs  SPEAKER A and B) are activated on the front panel| Check the cables and cable connections. Interconnect a phono preamplifier. Do not connect line level audio sources at the input (5). Turn on both speaker pairs (3).
Humming low-frequency noise is audible, even as no au dio source is  playing back| See section “Net frequency noise” in the chapter “Tips”.| See section “Net frequency noise” in the chapter “Tips”.

TECHNICAL SPECIFICATIONS

Frequency response: 20 Hz – 20 kHz ±0.5 dB
Nominal Output Power per channel at 8Ω: 150 W
Nominal Output Power per channel at 4Ω: 250 W
Input sensitivity: 1.35 V
Total Harmonic Distortion: < 0.1% (1 kHz, 1 W)
Signal to Noise Ratio: > 91 dB
Input Impedance: 47 kΩ
AC power connection type: 220V – 240V/50 Hz
Inputs: 1x RCA Main Input stereo, 1x XLR Main Input stereo, 1x Power Control (3,5mm Jack)
Outputs: loudspeaker clamps for up to 4 loudspeakers, 1x Power Control (3,5mm Jack) Dimensions (W x H x D): 426 x 165 x 430 mm
Weight: 21 kg
Colour: silver / black
Tubes: 2x 6N16, 1x 6N15

GLOSSARY

Input sensitivity
Term for the smallest average (RMS) input voltage which causes the maximum output power at the maximum volume setting on the amplifier.
Examples: 100 mV to 500 mV (Millivolts) on line level inputs, 2 mV to 5 mV on the phono MM input or 0.1 mV to 0.5 mV on the phono MC input.
dB Level
This is a way of describing any physical quantity; it is a common measurement for signal voltages and volume. It is given in decibels (dB). Alternating signal voltages below 1V (RMS) are described as “line level” voltages, which are suitable as music signals for amplifier inputs. Inputs on amplifiers (mostly represented by RCA sockets), which are designed for signals on the CD player, tape recorder, DVD player etc. are also referred to as “line level inputs”. Those signal inputs must not be confused with inputs that accept preamplified signals.

RCA
RCA is the American name for a type of coaxial connectors and sockets, originally the abbreviation for “Radio Corporation of America”, the name of a United States company. Both the plug and cable consist of a rod-shaped inner lead and a cylindrical-shaped outer lead. This enables a mono audio signal or a video signal to be transmitted. Compared to the XLR plug connector, this type of connection is also called an “unbalanced5 signal connection”.
FURTHER INFORMATION AS DEFINED BY THE ECODESIGN REGULATION

Power consumption in OFF-mode:<0,4 W
Power consumption in auto standby mode:<0,4 W
Time without input signal until auto-standby: 15 min. (auto standby can be switched off).

NOTES Please keep the receipt, store it together with this manual. The receipt is your proof for the beginning of the warranty period. Note the serial number in the following box, you can read it from the rear side of the device.
Serial number:……….

www.vincent-highend.de
© Oktober 2021
International Distributor: Sintron Distribution GmbH · Sudring 14 · D-76473 Iffezheim

Documents / Resources

| Vincent SP-332 Hybrid Stereo Power Amplifier [pdf] Instructions
SP-332, Hybrid Stereo Power Amplifier, Stereo Power Amplifier, Power Amplifier, SP-332, Amplifier
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References

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