Question about MB Quart Reference RAA4200 Car Audio Amplifier

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Missing Plugs The plugs that allow you to connect the wires to the amp... yeah, i'm missing two of the speaker wire ones... any suggestions?

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Re: Missing Plugs

I have a mbquartz 2500raa. If its a bridgable amp take each wire individualy and sauder each wire at the end into a ring large enough to fit around the plug ti area. When connected if sound is produced sauder each looped wire end to the plug area. Make sure to cover each wire with electrical tape so as to keep from arcking this is what i did with mine when i lost the plug.

Posted on Dec 28, 2007

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I have a Kenwood kac-628 amp and it turns on but only red lights. All wires are good and have good connections. I opened it up and there is a brass looking piece that seems broke. Maybe a piece is missing...

Disconnect the speaker wires from the amp side. Turn the amp on. Within about 5 seconds you should hear a faint click from the amp. If you don't hear the click, the amp probably has a problem. ie. Shorted outputs. If you hear the click reconnect one speaker and turn on again. If you don't hear sound disconnect that speaker and connect the other. If you have sound with either speaker the one that is disconnected is the problem. Check speaker wire carefully for frayed ends touching each other.
You can swap the speakers at the speaker end one at a time, to determine if it is the speaker or the. Wire.

Feb 02, 2015 | Kenwood Car Amplifiers

1 Answer

How to install jensen 40w+40w a-80

I have one of these new, in the box, with no instructions.

Power Output: 40W/Chan Maximum, 18W/Chan RMS
(20hz-20khz into 4 ohms at less than 1% THD)
Freq. Responce: 20hz-30khz, +/-3dB
Signal to noise ratio: 80dB, A-weighted
Input Sensitivity:
Low Level, 100-500 mV
High Level, 1-5v
Input Impedence:
Low Level, 10k ohms
High Level, 27 ohms
Load Impedence: 4-8 ohms allowable (4-8 ohm speakers)
Power Requirement: 14.4v DC (10.8-15.6 allowable)

As you can see the RMS wattage output of these units is only about 18W maximum.

I am planning on using the amp I have on a low power factory car radio. A low power factory radio output should be somewhere between 6-12 watts rms/channel. I will be using the "High Level" inputs for this. DO NOT connect a radio with a higher output power. If your radio says "High Power", 25W/channel, etc, do not connect to this amp. (exception: you can use the "line out" connectors, if so equipped, See Below). I don't have the connector for the high level input so i don't know what I'll do to hook up to it. I'll probably just run wires out of the amp, in lieu of the connector.

The "Low Level" inputs are for an unamplified, line level signal ("line out" connection of a radio, portable CD player, etc). Do Not connect a greatly amplified signal to these connections.

I don't know much about the "Input Sensitivity" control (pot). I'll be leaving it on "Low" for my initial test.

The grey wires are the right speaker wires and the white wires are the left speaker wires. The grey wire with a black tracer mark is the right speaker positive (+) wire. The white wire with a black tracer is the left speaker positive (+) wire.

The blue/white wire is for attachment to your radio's "Auto Ant" (power antenna) connection (usually a orange wire, I said USUALLY). If you have a power antenna on your car, simply splice into the wire running from your radio to the antenna. This blue/white wire activates a relay in the amp which, in turn, completes the circuit through the yellow (+) power wire (See Below). - Alternative 1: You could run this wire directly to your battery with a switch to turn the amp on. You would need to place an in-line fuse of 2amp. - Alternative 2: You could connect this wire to the accessory fuse in your fuse box. If this is done, again, attach a 2amp in-line fuse for extra protection. (Note: if attached to your fuse box accessory fuse, the amp will be on even if you're not using the radio. You could have a switch here also). These are just suggestions. The most common way to connect the blue/white wire is the "Auto Antenna" wire of your radio.

The large black wire is main Ground (-) for the amp. The large yellow wire is Positive (+) power to the amp. Ideally, these should be connected straight to your battery's (+) and (-) terminals. The yellow wire on your amp should have an integral in-line fuse holder with a 7amp fuse. If not, add one. Of course, the black ground wire could simply be attached under a screw, into the body of the vehicle.

Hope this helps !

Aug 12, 2012 | Jensen Car Amplifiers

2 Answers

I have my RCAs plugged into the rear/sub jacks on the back of the head unit where do i plug them in on the amp

bigguy810.jpgi hope this helps you it is giving you a basic
wireing diagram for a amp i cant see witch
one you have if this doesnt help send me a
pic of your amp so i can see what we are
dealing with my email is good luck bob

May 03, 2011 | Rockwood AMP-225 Car Audio Amplifier

1 Answer

Speaker or amp?

your running too low impedence, and yes its cuz of your sub wiring. How to wire it depends if its 2ohm dual voice coil, or 4ohm dual voice coil, so i'll explain both. O.K. first of all i hope its 4 ohm so you can get max power from your sub. If it is 4 ohm dual voice coil connect + to +, and - to - on your speaker, then to connect it to your amp, splice a wire into the wire running from + to + and connect it to your amp's + terminal. Do the same with your - wire. If its a 2 ohm dual voice coil, connect the + from one set of terminals on the speaker, to the - on the other terminal. Then to connect it to the amp, plug a wire from the open + terminal on the speaker and connect it to the + plug on the amp, and do, connect the empty - to the - on the amp. Good luck and if you have any questions don't hesitate to ask...

Sep 20, 2009 | Car Amplifiers

1 Answer

My name is Noah. I have a Volfenhag zx 7150 2 channel amp, and I was wondering if I could use this amp to run my mids and highs. And if yes, how would I run the wiring?

Hello violentj_1_u,

Yes, the amp can be used to power normal speakers on 2 channels.

The best way to wire the amp to a stock receiver (head unit) is to use a pair of wiring harnesses, one the standard harness that plugs into the vehicle wiring, the other a "reverse" harness that plugs into the stock receiver.

First remove the plug from the receiver and plug in the "reverse" harness. Run the speaker leads from the reverse harness to your amp inputs or to a line output converter (LOC) and RCA's to the amp. Then run the amp speaker outputs to the standard harness speaker wires. Plug the original receiver plug into the standard harness and splice the remaining wires, 12V constant, 12V accessory, ground, illumination, etc, together. Connect the 12V switched wire to your amp remote terminal.

Hope this helps.

Aug 25, 2009 | Car Amplifiers

1 Answer

What to do

Hello dodgeram1980,

If you are not getting sound from any of the 4 channels, I'd suspect that either the amp is not getting an input signal or the amp itself is faulty.

Here's the "no sound" troubleshooting step-by-step procedure from the JL manual:

1) Check the input signal using an AC voltmeter to measure the
voltage from the source unit while an appropriate test tone is
played through the source unit (disconnect the input cables
from the amplifier prior to this test). The frequency used should be in the range that is to be amplified by the amplifier (example; 50 Hz for a sub bass application or 1 kHz for a full range / high-pass application). A steady, sufficient voltage (between 200mV and 5.O-volts) should be present at the output of the signal cables.

2) Check the output of the amplifier. Using the procedure explained
in the previous check item (after plugging the input cables back into the amplifier) test for output at the speaker outputs of the amplifier. Unless you enjoy test tones at high levels, it is a good idea to remove the Speaker Connector Plugs from the amplifier while doing this. Turn the volume up approximately half way. 5V or more should be measured at the speaker outputs. This output level can vary greatly between amplifiers but it should not be in the millivolt range with the source unit at half volume. If you are reading
sufficient voltage, check your speaker connections as explained below.

3) Check to ensure that the speaker wires are making a good
connection with the metal inside the Speaker Connector Plugs. The speaker wire connectors are designed to accept up to 12 AWG wire. Make sure to strip the wire to allow for a sufficient connection with the metal inside each terminal.

Hope this helps.

Apr 30, 2009 | Jl Audio HD600/4 Car Amp

2 Answers

*amp to sub wiring help...

The 2500D has 2 "+" and 2 "-" power connections to help split the current between two smaller wires vs. one giant, hard to route wire. According the manual, for optimal performance, both "+" and "-" power connections should be utilized. They also recommend using 4AWG wire for these connections.

The 2 "+" and "-" speakers connections are only there to simplify the wiring of multiple speakers into the amp. Both "+" get tied together inside the amp, as do both "-" connections. In this case, with the dual 2 ohm voice coils on your 12" sub, you would wire one voice coil to one +/- set on the amp and the other voice coil to the other +/- set.

Mar 03, 2008 | Orion 2500D Car Audio Amplifier

2 Answers

Pioneer GMH100 Amplifier

If you don't need the OEM plug, you can use the type of connector used to connect to the terminals of a speaker. You will have to tighten the terminal slightly but one terminal will span the remote and acc pins and will allow you to use the amp. You don't need to apply power to the 'ill' pin of the plug. Be careful with the pins for the plug. The amps are known to having weak connections that break easily if excessive pressure is applied to the pins.


Jan 05, 2008 | Car Amplifiers

3 Answers


Hi, Jensen is under different ownership from when your amp was made, so it's unlikely that you'll find a replacement plug for the high-level input. A high-low converter is also called a line-out converter. It's a device that connects to the speaker wires and changes the signal to a low-level RCA connection. This allows you to use the amp's RCA plugs with your speaker wiring (through RCA signal cables). A line-out converter should be available any place that sells car audio accessories.

Aug 11, 2007 | Jensen XA92 Car Audio Amplifier

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