How can I run 3 channel Alpine amp?

[Kaczman 10+ year member]

Hey guys, I have an alpine MRP-F240 amp that can be ran at 2/3/4 channels. The amp specs are:

40 watts RMS x 4 at 4 ohms

50 watts RMS x 4 at 2 ohms

100 watts RMS x 2 bridged output at 4 ohms

At 4 ohms 0.08% THD

At 2 0.3 THD

My friends got 2 5.25s that can take 40w Rms and 2 6x9s that can take 50w rms.

The amp says it is 3 channel capiable. Can I run the 5.25s at 4 ohms off channel 1 and 2 and bridge channel 3 and 4 together to give the 6x9s a combined power of 100w rms (50 per channel) at 2 ohms? Thanks!

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[cjjackson85 5,000+ posts]

No...

 

[~Magick_Man~ 10+ year member]

i have that amp and it wouldnt like 2 ohms while bridged

just hook the 6 x 9's to ch 3/4 seperatelyso each channel is powering 1 speaker and call it good.

~Magick_Man~

 

[Kaczman 10+ year member]

alright, thanks man

 

[stones 10+ year member]

The audible difference for the 6x9's when going from 40 to 50 watts is almost nil.

Just hook them up normally and all will be well.

PS- Alpine amps are slightly underratted so that 40 watt rating is probably closer to 50 anyway.

 

[Decipha 10+ year member]

simple... use 2 channels in stereo and bridge the other 2 channels for a sub