i found a Alpine V12 MRV-F407 at a pawn shop.. fully working and everything for $79.99... but i was looking at a newer model... The MRP-250.

The V12 MRV-F407 has
Output Power at 12.0V (20Hz ∼ 20kHz):
4 x 40W @ 4 ohms (0.04% THD)
4 x 50W @ 2 ohms (0.3% THD)
2 x 100W @ 4 ohms Bridged (0.3% THD)
Output Power at 14.4V (20Hz ∼ 20kHz):
4 x 60W @ 4 ohms (0.04% THD)
4 x 80W @ 2 ohms (0.3% THD)
2 x 160W @ 4 ohms Bridged (0.3% THD)
Freq. Response: 10Hz ∼ 50kHz (+0/-1 dB)
S/N Ratio: 105dBA (at rated power)

while the MRP-F250

RMS Power (at 14.4V THD+N, 20Hz-20kHz)

Per channel into 4 ohms: 40W x 4 (0.08% THD)
Per channel into 2 ohms: 50W x 4
Brigded 4 ohms: 180W x 2

Which one would be best? im looking to power component speakers...

 

Get the V12 series the MRV, they have variable crossovers. MRP has fixed crossover points except their mono amps.

 

oh ok, good.. hahah.. i was looking around.. and i saw a JLAudio E6450 6CH.. which i was DEFINATELY going to buy (or put on layaway.. short on cash..) but i tested it in my car.. and it didnt even power on! so i was like damn.. that was a good amp gone to waste.. and then i saw a V12 amp.. and was thinking to myself.. isnt that like alpine's top-of-the-line series..? and i put it on layaway.. it was either that or the MRP-F250.. and they had very close ratings.. so i was like pretty indicisive(sp?) so i ended up going with the V12MRV-F407..

 

The V12 series was their top of the line amps but now they have the PDX series.

 

How much did it run for... back in the day..? isnt this a 2001 Series AMP?

 

Around $300 at the time.

 

I competed with the V series amps from alpine and I never had any problems with them They are really a little under rated, I belive for 80 bucks you cannot go wrong!

 

i have that exact amp(mrv-f407), was in my old eclipse powering 6x9s and boston comps 6.5LF, getting ready to put it and 2 sets of the 6.5LFs in me new maxima. I love the amp and have had no problems with it. I also have 2 mrv-t757 powering 2 Boston Competitor 12s. Its all gonna be in the max soon, cant wait.

 

I would go with the MRV-F407.

 

V12 will always be better than V-power amps...

 

wow, lol i thought this thread was DEAD... Yeah, i went with the V12 Amp, its not in bad shape, it has a little scratches and dents, but it powers on and all of the channels work.. even though i tested it with my Subwoofer preouts



Variable Crossover Network

 

Hey, my reply survived the "hacking"!

 

i thought id just add on to my existing post..

The alpine... has a problem....

Protection light blinks on and off RED
Manual says... "RCA Ground Floated"

What does that mean?

 

Hey,
I just got an Alpine Mrv-T757 V12 2ch amp doing the same thing. I know this thread is dead but for anyone else with the same problem, I found the fix. I did a lot of research and came across this thread. It is an open circuit from the RCA signal ground to the amp ground. To fix it, I removed the back cover and soldered a wire from both (-), or outside of the RCA connects, to the main amp ground wire input. Put the back cover back on, power up, and presto... Protection light is green. I hope this helps someone else because these are great amps.

 

Hmm.. Actually i figured out what had happened.. my Pioneer headunit blew a internal fuse for the preouts..