RAM Audio MDi2 1K4-2K7-6K MDi Series Professional Power Amplifiers User Manual
- June 6, 2024
- RAM Audio
Table of Contents
RAM Audio MDi2 1K4-2K7-6K MDi Series Professional Power Amplifiers
SAFETY PRECAUTIONS
WARNING:
The exclamation point inside an equilateral triangle indicates the existence
of internal components whose substitution may affect safety.
The lightning and arrowhead symbol warns about the presence of uninsulated
dangerous voltage.
CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
To avoid fire or electrocution risk do not expose the unit to rain or
moisture.
To avoid electric shock, do not open the unit. No user serviciable parts
inside. In the case of disfunction, have the unit checked by qualified agents.
Class I device.
©2018 by C.E. Studio-2 s.l.
Pol.Ind. La Figuera
C/ Rosa Luxemburgo nº34
46970 Alaquas – Valencia – SPAIN
Phone: +34 96 127 30 54 Fax: +34 96 127 30 56
http://www.ramaudio.com
e-mail: contact@ramaudio.com
P-7156-965 QXPDQXDoc 8/18
RAM Audio®, FCM™, SSP™, ICL™ and QuantaPulse™ are registered trade-marks of
C.E. Studio-2 s.l. All other names are trademarks of their respective
companies.
General Information
Introduction
The MDi Series of amplifiers has been specifically developed for fixed
installation and/or network applications. Thus they are equipped with specific
connec-tors: Euro style input and screw terminal barrier strip output, to
offer clear, direct and hassle-free connectivity. Furthermore, they offer up
to sixteen independent channels per unit to allow for as many zoning
possibilities. Their unitary power output is dimensioned to suit specifically
that type of installations.
The MDi Series incorporate unique absolute protections as the FCM™ or SSP™
systems.
Main Characteristics
-
Sixteen, eight, four and two channel models.
-
Ultra-compact and lightweight 2-U high.
-
Laser cut aluminum front panel.
-
FCM™ Faulty Channel Management system to avoid entire device shut-down.
-
State-of-the-art layout for maximum performance and reliability.
Detented sealed potentiometers for easy recall of volume settings, excep-ting 16-channels model. -
ICL, PROT, SIGNAL indicators per channel.
-
Optional Add-on card to interface with third party alarm systems with GPIO connections.
-
ICL clip-limiters.
-
Switchable (35Hz) sub-sonic highpass filter per channel.
-
All channels bridgeable by pairs.
-
Temperature and signal dependant, intelligent cooling system for minimal noise.
-
Highly oversized thermal dissipation design for maximum reliability.
Controls Where and What
Front Panel
-
Signal attenuation level control knobs: Permit independent control of each channel’s attenuation (21 steps), excepting 16-channels model.
-
SIGNAL: This LED indicates pre-sence of signal at the inputs.
OK: This LED shows temperature protection is active (Red).
ICL: LED indicating Intelligent Clip Limiter in operation. -
Main Power Switch:
Position I: Connects the amplifier’s current feed. (OK green LED on). Position O disconnects the Power.
Rear Panel
- Signal Input: Euro style connectors for the amplifier’s signal input.
- Configuration Switch: Sub sonic filter (35Hz), and Bridge (see page 9).
- Speaker connectors: screw terminal barrier strip to connect the speakers.
Installation and Operation
Connections
The Power switch must always be on the “Off” position before plugging the amp
to a properly earthed mains socket (220-240V AC / 110V-120V AC).
The input signal fed to the amplifier can be either balanced or unbalanced.
The drawing below describes both ways to wire an Euro style connector for the
purpose.
Balanced Signal: Connect pin to Ground, pin + to Signal + (hot) and pin –
to Signal – (cold).
Unbalanced Signal: Connect Pin to Ground, pin + to Signal and pin – to
Ground.
Important!: If a
connection is done with an unbalanced line and pin – on the Euro style is not
connected to ground, a 6 dB loss occurs in the line and only a quarter of the
amplifier power is produced.
The amplifier can operate on two diffe-rent configurations: DUAL or BRIDGE. The connections for the two modes are different.
DUAL Channel Mode
- Switch “Off” the amp.
- Set the Configuration Minidips on the rear panel to NO Bridge (see page 9).
- Connect the signal lines to the Euro style connectors on all channels.
- Connect the speakers’ lines to the corresponding screw terminal on the amp respecting the polarity.
- Switch “On” the amp.
- Use the level control knob on the front panel to adjust each channel indepen-dently.
- Each signalling LED group will show its corresponding channel status.
BRIDGE Channel Mode
- Switch “Off” the amp.
- Set the Configuration Minidips on the rear panel to “BRIDGE” (see page 9).
- Connect a signal line to the Euro style connectors Channel “1”, “3”, “5” or “7”.
- Connect the speaker line wired to CH1(+) and CH2(-) (“3”&“4”, “5”&“6” or “7”&“8”) screw terminals. In this way pin CH1(+) is the positive.(also “3”, “5” or “7”).
- Switch “On” the amp.
- Use Channel “1” (“3”, “5” or “7”) control knob to adjust the amp’s output.
- The signalling LED groups will show the single channel status.
Configuration
The amplifier has an ensemble of mini-dips on the back panel, which allow for the following configurations: the high-pass subsonic filter, the Gain selection and the bridge mode. All these configu-rations can be cross-set in any way, independently from the others. The basic configuration possibilities are as follows:
Standard Configuration: the amplifier works without high pass subsonic filter, and no Bridge mode. Subsonic Filter Enabled: the amplifier works with Channel 1 high pass subsonic filter (35Hz), and no Bridge mode. Bridge Mode: the amplifier works with-out high pass subsonic filter, and Channel 1/Channel 2 Bridge mode.
Troubleshooting
In the event of incorrect connection or misfunctioning, the amp will activate
one or more of its LED to warn about the problem. 
Correct function: SGNL lights to indi-cate
signal presence. (OK Green)
ICL: The Intelligent Clip Limiter is ope-
rating.
No Signal: No
Input Signal is reaching the amp.
Protections: (OK Red) Several causes can
trigger this LED, most common are:
- Overheating: The amplifier has reached the maximum operational temperature. Most common cause is: the normal air flow is blocked, accumulated dirt, dust or object leaning against the grill. Check and clean periodically.
- Short-circuit in the speakers ’ line or in the speakers themselves.
- Low Impedance: check speakers’ connections or possible speaker dysfunction.
- DC in the output: the protections are activated to avoid damage to the speakers, the unit must be sent in for repair to a qualified technician.
- Delayed Start: As you switch on the amp the output to the speakers is dis-connected. After a few seconds the amp will connect the speakers and proceed with normal functioning.
Technical Specifications
High Z
70Vrms/100Vpeak| – 2x 1350W – –
4x 1500W –| 4x 680W –
---|---|---
100Vrms/140Vpeak| 1x 1400W – 2x 3000W 2x 1200W
– 4x 3000W| – 4x 1500W 8x 1500W
Frequency Response| | | |
Power Bandwidth ±0.25dB| | | | 20Hz-20kHz
Total Harmonic Distortion| | | |
20Hz-20kHz| | | | <0.05%
Intermodulation Distortion| | | |
SMPTE| | | | <0.05%
Damping Factor| | | |
20-500Hz @8Ù| | | | >400
Crosstalk| | | |
20Hz-1kHz (typical)| | | | >70dB
Voltage Gain| 32dB| 32dB| 32dB| 32dB 32dB 32dB
32dB 32dB 26/32/38/44dB
Sensitivity| | | |
Rated Power(@32dB) 1.4 V| 2.1 V| 2.8 V| 1.3 V| 2 V|
2.8 V| 1.1 V| 1.4 V| 1.4 V
Signal-to-Noise Ratio
20Hz-20kHz 101dBA
| ****
103dBA
| ****
104dBA
| ****
105dBA
| ****
101dBA
| ****
103dBA
| ****
104dBA
| ****
104dBA
| ****
104dBA
Required AC Mains| | | | | | | | |
V AC (50Hz-60Hz)| | 170-265| 90-265| 170-265| 90-265| 90-265| 170-265|
90-265| 90-265
Power On Idling (@230V)| 0.5 A| 0.5 A| 0.5 A| 0.5 A| 0.5 A| 0.5 A| 0.5 A| 0.5
A| 0.5 A
1/8 Rated Power (@4 ohm)| 1.8 A| 4 A| 4.5 A| 3.2 A| 4.5 A| 9 A| 4 A| 4.5 A| 9
A
Dimensions| | | | | | | | |
W x H x D (mm)| 483×88.9×254 | __ 483×88.9×396 483×88.9×406
W x H x D (inches)| 19×3.5×10| 19×3.5×15.6 19×3.5×16
Weight**| | | | | | | | |
Net (Kg-Lbs)| 5-11| 5-11| 6-13.2| 5-11| 7.5-16.5| 9.5-20.9| 7.5-16.5| 5-11|
12-26.4
Manufactured in the EU by C.E. Studio-2 s.l.
Pol. Ind. La Figuera – C/ Rosa Luxemburgo nº34
46970 Alaquas – Valencia – SPAIN
Phone: +34 96 127 30 54
Fax: +34 96 127 30 56
http://www.ramaudio.com
e-mail: contact@ramaudio.com
References
Read User Manual Online (PDF format)
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