Alpine MRP-M500 i recently purchased the alpine mrp-m500. hooked it up, worked fine for 20 minutes and then cut off. no fuses blown, evrything is hooked up right. i have it hooked up to a 12 type r dual voice coil. whats the prob?

Any time that there is a rattling sound from the subs, that indicates that they are probably blown. How were the subs tested ok? If the resistance of the subs is still close to OK, that is good, but it doesn't necessarily indicate that they are working properly.
Try using different subs at a lower volume, or turning down the gain slightly.

hope this helps.

caution

About Power supply wires (MRP-M1000 only)

• 21mm2 is the minimum power and ground cable size

that should be used to connect this amplifier. The

length of these cables should not exceed 1m to assure

safe operation.

• If the length of the power and ground cables exceed

1m, or if you connect more than one amplifier, a distribution

block should be used with 33mm2 or 53mm2

power and ground cables depending on the length

necessary. Ensure that you install a correctly-rated

in-line fuse on the power cable near the battery positive

post.

RMS Continuous Power (at 14.4 V, 20 - 200Hz)

• Per channel into 4 ohms (?1% THD+N)

MRP-M1000 ......................................... 600 W x 1

MRP-M500 ........................................... 300 W x 1

• Per channel into 2 ohms (?1% THD+N)

MRP-M1000 ....................................... 1000 W x 1

MRP-M500 ........................................... 500 W x 1

Total MAX Power

MRP-M1000 ............................................. 1900 W

MRP-M500 ............................................... 1100 W

S/N Ratio

• IHF A Weighted, Reference: rated power into

4 ohms .................................................... 100 dBA

Input Impedance

• RCA IN .................................................. 20k ohms

• SP IN .................................................... 40k ohms

Frequency Response (200Hz/ -3dB) ....... 20 - 200 Hz

Crossover Frequency .......... 50 - 200 Hz (-24dB/oct.)

Input Sensitivity (RCA IN) ............................ 0.2 - 4 V

Dimensions

• Width (Heat Sink/Footprint)

MRP-M1000

......... 320 mm (12 - 19/32")/380 mm (14 - 61/64")

MRP-M500

............... 210 mm (8 - 17/64")/270 mm (10 - 5/8")

• Height ..................................... 60 mm (2 - 23/64")

• Depth .................................... 242 mm (9 - 17/32")

Weight

MRP-M1000 ................................................ 4.2 kg
MRP-M500 .................................................. 2.7 k

Here is a copy of the owners manual that guides you on how to install, including the wiring......hope this helps
http://support.alpine-usa.com/products/documents/OM_MRP-M500.PDF

good job after they are broken in for a few months gain can go to just ovr half

yes you have a internal fault of the amp. the circuit that puts it into safe mode is bad and that is a very small chip on the board know as a op amp. needs to be repaired.

Hello vincent_i_fa,

No, the Alpine MRP-M500 is only stable down to 2 ohms.

Hope this helps.

check sloder conection in amp. if your amp is in trunk it copuld have over heayed and mealted the metal.

The Subs are probably blown . Take them to a shop to have them tested .

Have you tried checking the remote wire yet? Because it could very possibly be that. Without a remote wire hooked up, you cannot get any power. Try that and see if it works.

It is either hooked up wrong or the wire you are using is too thin. Be sure to use the proper gage wire for the output of the amp.