Question about Alpine MRD-M300 Car Audio Amplifier

Hi, I have a MRD-M300 (99% sure) hooked up to 2 10" subs. Got them installed at Circuit City maybe 5 years ago, they said it was a fine set up. Bass stopped coming out around xmas so I took it into a local shop to be diagnosed. He said the whole amp was blown because it had been underpowered. Q: Wouldn't it have been blown sooner than that? And can it be fixed or is it kaput? Thanks!

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Kevin Braid

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382 Answers

That is a little strange, I would tighten up and clean up your ground and power connections, check your fuses.

Does the amp power up?

Amp being underpowered doesn't make any sense, unless he means that the wire was of too light a gauge to supply the amps demand, but typically that will cause overheating and the amp will click off.

Now over driving the amp can burn out the coils in the sub.

Check your subs by tapping a battery on the wire going to them and see if they move and make a pop, if so you are good.

Go ahead and check connections, fuses, subs and let me know what you find then we will attack the exact problem.

Let me know how it works out,

Thanks!

PS If I had a nickel for every bad ground I had to fix from shops around here I would make slightly more money every month!

Posted on Feb 04, 2010

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Watts

The MRD-M300 has speaker-level inputs so you can easily use it with any car stereo. Hook it up and hear what good bass can sound like!
Details:

150 watts RMS x 1 at 4 ohms
300 watts RMS x 1 at 2 ohms
MOSFET power supply and output stage
STAR Topology for cleaner sound
Bass Engine® features:
- low-pass digital crossover, 30-200 Hz, 24 dB/octave
- variable subsonic filter (15-50 Hz in 5 Hz steps)
- parametric EQ variable from 30-160 Hz
- Bass Compensator enhances low-end definition
top-mounted digital control center with cover
time correction 0-10 milliseconds in 0.5ms steps
phase correction 0-180° selectable
digital readout
detachable front cover
blue power LED
delayed turn-on
requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
speaker- and preamp-level inputs
gold-plated terminals
8-5/16"W x 2-11/16"H x 11-1/2"D (10"D without front cover)
1-year warranty

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Hi hows it going i have a kenwood vr-8060 6.1 receiver i cnat get no bass out of it when i have my powerd sub hooked to it or when i have just a normal sub hooked up is there some setting i can hit to...

Kenwood VR-8060 6.1 Channels Receiver

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