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Old 2nd April 2011, 12:07 PM   #1
diyAudio Member
Join Date: Feb 2011
Talking Alpine MRV-F400

Hey guys , i have a MRV-F400 in mint condition ,
what should i do next ?
Yes , it has only been in use for 3 years since purchased in 1998'
That's cause my dad used it for a while and changed cars and never used it again .
No matter , should i use for a guitar amp power amp section
OR ,
a bass amp ?
( Don't say it's for cars , this was the utmost high-end of alpine's back then , and also alpine made properly good amps . )
It works damn well ,
here are the specs ( i just opened it up , the power section transistors look tip-top )
Using 4 channels will be out of the question , i will use it to create 160W @ 4 ohms bridged into 2 channels .
• Multimode Capability
• Active Dividing Network
• Duo-ß Feedback Circuitry
• No Current Limiting
• S.T.A.R. Circuitry
• Input Mode Selector
• Continuously Adjustable Gain Control
• Fully Discrete, Complementary Output Circuitry
• Gold Plated RCA Input Connectors & Screw-Down Power & Speaker Terminals
• High Performance, Low Noise, Audiophile Quality Active & Passive Components
• Pulse Width Modulated (PWM) DC-DC Power Supply ( yes , it's a SMPS , but it's gone a long way from being noisy , it has a huge choke and 2 x 6800uf caps . )
• LED Status Monitor

Dynamic Power (at 14.4V, 20 - 20k Hz)

Per Channel into 4 ohms: 60W x 4 (0.08% THD)

Per Channel into 2 ohms: 80W x 4 (0.3% THD)

Bridged 2 Channel into 4 ohms: 160W x 2 (0.3% THD)

So i can probably squeeze out tons of power before it even hits 1% THD , who won't agree ?
And also , there are is both selectable LPF/HPF for the channels , not to mention a selectable 50hz to 200hz crossover ,
selectable gain ( 0.5V on 3 o'clock position ) , input mode selector , for each channel , mmm , sound good .
i might rewire another kind of pot into the gain so it can outboard adjustable !

Last edited by DJDestiny; 2nd April 2011 at 12:10 PM.
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