NVS Drawers 10 Input Mixer Amplifier with Equalizer User Manual
- June 12, 2024
- NVS
Table of Contents
NVS-90170061MA / NVS-90180121MA / NVS-90010251MA / NVS-90190351MA
10 Input Mixer Amplifier with Equalizer
User Manual
Drawers 10 Input Mixer Amplifier with Equalizer
Thank you for using our public address system. Please read this User Manual carefully to make better use of this equipment
Attention
This equipment is not waterproof. To prevent fire or electric shock, please
do not place any liquid filled containers (such as vases or flowerpots) near
the equipment or expose the equipment to dripping, splashes, rain, or
moisture.
** Please hold the plug when moving the power cord. Do not pull the power
cord when pulling out the power plug. Do not touch the power cord when your
hands the device, please be sure to place it on a horizontal and stable
surface.
Please keep this User Manual in good custody for future use.**
General Description
1.1 Power Amplifier of PA Conference System
NVS Mixer amplifiers are a type of Public Address conference equipment’s
that integrate the equalizing function, frequency shift function, front, and
backstage amplification function. The products provide 4 audio source input
ports, 6 microphone input ports, a line output port and 4 power amplifier’s
output terminals, etc. Among them, you can select one audio input from 4
channel audio input ports and control its volume. The volume of the 6
microphones can be controlled independently. A mastervolume control is
provided for controlling the total output volume. The 7-band equalizers (EQ)
have been provided to adjust the output. The shifted frequency of microphones
is 0-5Hz higher than the original frequency.
These products have rated voltage outputs of 100 V, 70 V, and rated resistance
outputs of 4 Ω, 8 Ω, 16 Ω. They are split into separate kinds of models like,
60W (NVS90170061MA), 120W (NVS-90180121MA), 250W (NVS-90010251MA) and 350W
(NVS90190351MA). The products are designed according to the requirements of
the conference hall having no whistle, with the tone loud and clear and the
volume adjustable. The products provide with multiple protection, well-found
function and with the stable operating state and can meet the requirements of
conference site for the sound amplification and the background music.
1.2 Performance Features
- Suitable and reliable operation mode with integrated functional design.
- 4-line inputs, a line output, 6 microphone inputs (balanced with 24V phantom power supply).
- 4 number of audio source channels can be selected automatically by their priority level.
- Mute function, easy to override the normal playing.
- Microphone frequency shift function, and the range of shifted frequency can be adjusted.
- Built-in chime generator, and adjustable chime output volume.
- The volume of microphones and the audio source channels can be controlled independently.
- Master controller to control the total volume.
- 7-band equalizer, and the adjustment is convenient.
- With 100 V and 70 V rated voltage output, 4-16 Ω rated resistance output.
Brief Description of Product
2.1 Description of Front Panel
-
Power switch and power indicator
Press down the power switch button to turn on the power, and the power indicator is lit when the power is turned on; If press down the power switch button again to pop up the switch, the power is turned off, and the power indicator is distinguished when the power is turned off. -
7-band equalizer adjustment slider
With the slider sliding up to increase the gain of frequency band and sliding down to attenuate the gain of frequency band. -
Microphone 6 volume adjustment knob
To adjust clockwise to increase the volume, and to adjust counter clockwise to decrease the volume. -
Microphone 5 volume adjustment knob
To adjust clockwise to increase the volume, and to adjust counter clockwise to decrease the volume. -
Microphone 4 volume adjustment knob
To adjust clockwise to increase the volume, and to adjust counter clockwise to decrease the volume. -
Microphone 3 volume adjustment knob
To adjust clockwise to increase the volume, and to adjust counter clockwise to decrease the volume. -
Microphone 2 volume adjustment knob
To adjust clockwise to increase the volume, and to adjust counter clockwise to decrease the volume. -
Microphone 1 volume adjustment knob
To adjust clockwise to increase the volume, and to adjust counter clockwise to decrease the volume. -
Microphone 1 port
With the No.1 priority function, to facilitate the inserting of an emergent PA. -
Output volume level meter
If the 4th and the 5th indicators of the level meter are normally lit, it means that the output has a top chopping distortion, and the adjustment should be given to the corresponding volume control knob to decrease the volume, making the 4th and the 5th indicator flash. -
Equalizer/bypass mode change over switch
Press down the switch for the equalizer adjustment mode; Press the switch again to pop up for the direct mode. -
Microphone frequency shift switch
Press down the switch for the frequency shift function; Press the switch again to pop up for the direct mode. -
Channel status display indicator
When the channel selection button selects a certain audio source input channel, the indicator of the corresponding channel will be lit and display. -
Channel selection button
A certain audio source channel can be selected for play by clicking the selection button. The selection is carried out among AUTO, AUX1 to AUX4 respectively, among them AUTO status is for the auto detection. -
Channel volume adjustment knob
It is used to adjust the volume magnitude for AUX1 to AUX4 channels, and the object adjusted is according to the gating condition of the channel selection switch. -
Total volume adjustment knob
Adjust clockwise to increase the volume and adjust counter clockwise to decrease the volume. That knob can also be used to control the chime output volume. -
Chime output trigger button
Touch it lightly once to trigger the chime output, and after the end of playing the tone signs of ‘1-3-5-i’, it will stop automatically.
2.2 Description of Rear Panel
-
Chime adjustment knob
Turn the knob clockwise to increase chime volume and counter clockwise to decrease chime volume. -
Mute adjustment knob
Reduce the mute extent by rotating clockwise, and raise the mute extent by rotating counter clockwise. -
Auxiliary 1, 2, 3 and 4 input ports
Those four input ports are used to connect external audio source devices and are all for input line signals. -
Auxiliary output port
It is used to connect the external amplifier. -
AC220V power supply fuse
If the fuse is destroyed, replace it with a fuse that meets the same criteria. -
AC220V power outlet
When the power is on, do not pull out or plug in the power plug. -
Microphone 1,2,3,4,5,6 sockets
They are XLR sockets. -
24V phantom power switch
The microphone will have a 24V phantom power supply if the switch is turned to “ON,” and the phantom power supply will be turned off if the switch is turned to “OFF.” -
Built-in cooling fan
The working voltage is 12V. -
Output common terminal
-
P1 output terminal
It is possible to connect multiple speakers in parallel, but the overall impedance must not be less than 4 ohms. -
70V rated voltage output terminal.
-
100V rated voltage output terminal.
Operating Instructions
3.1 System Connection Diagram
3.2 Connection Diagram of Speaker
Note: The four outputs are connected using the following methods: COM-P1,
COM70V, and COM-100V. Only one set of output terminals can be connected, and
the speaker connected to COM-P1 cannot be linked to COM-70V and COM-100V;
otherwise, the speaker may be burned.
3.3 Equalizer Adjustment
The device features two output modes: EQ and Bypass, and the “EQUALIZER
SWITCH” button on the front panel may switch between them. The gadget is in
equaliser output mode when this button is pressed. Slide the 7 faders in the
7-band frequency adjustment area up or down to increase or decrease the
amplitude of the corresponding frequency band at this time; when the
“EQUALIZER SWITCH” button is popped up, the device is shifted to bypass mode,
and the operation of the 7-band frequency adjustment faders is invalid in this
case.
3.4 Selection of Channel
Auto Selection
The “SELECTOR” button on the front panel is used to pick the audio source
input channel. You can pick your choice based on the indicator on the button’s
left side. When the “AUTO” indicator is turned on, the device will recognise
signals from the four audio source input channels automatically, which takes a
few seconds. When a signal is detected, the relevant channel’s indicator will
always be on. If two or more signal inputs are discovered, the device will
automatically play the higher-priority audio source signal. The four input
channel signals have priority levels of AUX1, AUX2, AUX3, and AUX4. When a
signal is detected and played, the indicator corresponding to “AUTO” and the
indicator corresponding to the current channel will both be on.
Manual Selection
If a specific input channel signal must be specified as the audio source to be
played, press the “SELECTOR” button to do so. If you want to use the AUX1
channel input signal as the audio source, for example, click the “SELECTOR”
button to turn on the AUX1 channel indicator, and the device will play the
programmed signal input from that channel. The “AUTO” indication will not be
on when you manually pick the playing channel, but the indicator for the
selected channel will always be on.
3.5 Volume Control
Each microphone channel has a volume control knob that is used to control the
output volume of that microphone channel. The knob “VOLUME” controls the
volume of four audio source input channels equally. The “MASTER”, master
volume control knob is used to control the amplifier’s total output volume.
The “MASTER” knob or the “CHIME VOL” knob on the back panel can be used to
control the chime output volume. Adjust the volume with a “cross-head”
screwdriver clockwise to increase volume and counter clockwise to decrease
volume.
The “MASTER” volume control knob will be invalid if the volume control knobs
for each microphone, four channels, and the chime are all closed completely.
The other volume control knobs are also invalid if the “MASTER” volume control
knob is closed.
The “MUTE”, mute adjustment knob is used to control the device’s mute extent.
By adjusting the knob, the signal input from the chime or MIC1 can totally
override or only weaken other input signals. The adjustment range is 0 to -30
dB, with the factory setting being -30dB. The device is equipped with a
frequency shift mechanism to avoid microphones from howling excessively: To
turn on the frequency shift function, hold down the selection switch “FREQ.
SHIFT SWITCH,” and the frequency shift function will be cancelled when the
selection switch is showed up.
3.6 Microphone and Priority Function
MIC1, MIC2, MIC3, MIC4, MIC5, and MIC6 are among the device’s six microphone
ports. The MIC1 and the chime signals, for example, have the same priority
purpose and can override all other signals. For condenser microphones, a 24V
phantom power supply is available.
- Please turn the switch “PHANTOM” to “ON” while using the condenser microphone.
- Turn the “PHANTOM” switch to “OFF” while using the dynamic microphone.
Safety Precautions
4.1 Precautions of Safety Operation
- Please do not connect this item to a power supply until the system has been properly wired.
- It is critical to ensure that the device’s input voltage matches the device’s needed voltage; otherwise, the gadget may be damaged.
- The device contains dangerous voltage that could cause personal electric shock. To avoid the risk of electric shock, please do not open the casing without permission.
- When the gadget is switched to “OFF,” it is not totally unplugged from the power supply. If the device is not in use, please detach it from the socket for safety reasons.
- Please do not place the gadget in an extremely cold or hot environment.
- The device’s working area must have adequate ventilation to avoid extreme temperatures during operation, which could cause harm to the equipment.
- Please unplug the device from the power socket on rainy or wet days, or if it has been inactive for an extended period of time.
- Please disconnect the power plug from sockets to ensure the device has been completely disconnected from the power source, before any component is removed from or reinstalled in the device, or before any electric connector of the device is disconnected or reconnected.
- If any failure of the device, do not open the case and attempt to fix it without first seeking authorization from a specialist. This will prevent an accident or further damage to the equipment.
- Please avoid putting corrosive chemicals near or on the gadget.
4.2 Matters Requiring Attention
-
The Company offers a one-year free guarantee (including free replacement components) on quality faults starting from the date of purchase, as long as the equipment is installed and used according to the User Manual’s specifications. At any time for the repair guarantee, the consumer should present the Card of Guarantee and the sales invoice as a proof.
-
The following criteria are not included in the provision of the free service.
1. Damage to the product as a result of improper installation, application, or handling;
2. Product damage as a result of an abnormal condition (such as excessive voltage or humidity, for example);
3. Product damage caused by a force majeure event such as a natural disaster or an accident;
4. The product body number has been converted, changed, or eliminated;
5. The product has previously been repaired or modified by non-authorized persons. -
Please keep the Operation Manual and Card of Guarantee carefully.
-
As to the subjects or precautions not mentioned in the manual, please contact the distributor, or visit the web page of our company:
“https://www.nordencommunication.com” when necessary. -
If any failure phenomena occur during the time of guarantee, please contact the business’s service employees (or the distributor), as the company will not assume obligation to repair free of charge if the damage is caused by selfassembly or repair by non-company technical personnel.
Performance Specifications
Model| NVS 90170061MA| NVS 90180121MA| NVS 90010251MA|
NVS 90190351MA
---|---|---|---|---
Rated output power| 60W| 120W| 250W| 350W
Output voltage adjust rate| From full load to no load, 53dB
Minimum power emf| Microphone 53mV (unbalance input)
Microphone 53mV (balance input)
LINE: 5300mV
Frequency response| 80Hz -16KHz (±3dB)
Total harmonic distortion| 50.5% (1 KHz, under normal working condition)
S/N ratio| Line: 70dB
7-band equalizer| 64Hz: ±12dB
160Hz: ±12 dB
400Hz: ±12 dB
1KHz: ±12 dB
2.5KHz: ±12 dB
6.4KHz: ±12 dB
15KHz: ±12 dB
Protection function| DC, overload, short-circuit.
Mute function| Microphone 1 and chime input covering other inputs
Phantom power| DC24V
Frequency| 0-5 Hz higher than the input signal frequency
Rating power| AC 220V / 50Hz
Power consumed| 120 W| I 250 W| I 500 W| I 650 W
Dimensions| 430x368x88 mm
Gross weight| 12.5 kg| 16 kg| 15.5 kg| 16.5 kg
Net weight| 11 kg| 14.9 kg| 14 kg| 15 kg
Note: No prior notice will be given for modification of specifications in any.
CAUTION
- When the power switch is “OFF”, the machine is not completely disconnected from the powergrid. For the sake of safety, please pull the power cord plug out of the socket when not using theequipment.
- The equipment shall not be subject to water drops or splashes, and objects such as vases filledwith water shall not be placed on the equipment.
- To reduce the risk of electric shock, do not remove the cover. If necessary, please ask professional personnel to repair.
- The symbol on the rear panel indicates hazardous live. The connection of these terminals must be operated by the instructed person.
- The equipment is connected to the power grid through the power cord plug. In case ofequipment failure or danger, the connection between the unit and the power grid can bedisconnected by pulling out the power cord plug. Therefore, it is required to place the powersocket to a position where the power cord can be plugged and unplugged conveniently.
References
- Norden Communication : Cables, PA Systems & Surveillance Systems Manufacturer & Supplier.
- Norden Communication : Cables, PA Systems & Surveillance Systems Manufacturer & Supplier.