Quick 4 channel amp wiring

[adio25 10+ year member]

I'm trying to run my 4 channel MB Quart DSC480 bridged at 320w x 2 @ 4ohm for my front component speakers. The picture shows which RCA jacks my left and right channel are currently in and my left and right speakers are on the proper bridging terminals. So are the RCA's in the right spot for running 2 channel bridged? The picture also shows the exact position of all the switches on the amp that I am currently running. For my question on the #1 in the picture, is where should this be set at? 4 channel or 2 channel? And for #2, what should I have dupe 3 & 4 set at?

Thanks

Hight Res shot : http://img.photobucket.com/albums/v129/nikeslugger425/dsc480CA.jpg

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[adio25 10+ year member]

Bump

 

[nismos14 5,000+ posts]

no, use the 1 and 2 input.

 

---------- Post added at 07:38 AM ---------- Previous post was at 07:37 AM ----------

 

and switch to 2 channel input.

 

[nismos14 5,000+ posts]

it doesn't matter where 3/4 button is at unless you're running the crossover on the amp, if you are, then just turn dupe on.

 

[fasfocus00 5,000+ posts]

#1 should be set to 2 ch, your RCAs should be in channel 1 and channel 2. i would put both X-over setting to HP and set it close to 100hz.

 

[mylows10 5,000+ posts]

if you set the hp filter on then you will have little to no mid bass,set it to full pass, let the passive xover split the signals and yes around 80-100 on the xover setting

 

[nismos14 5,000+ posts]

The passive does not have a bandpass, it only has a low pass for the midbass, and a high pass for the tweeters.

 

[mylows10 5,000+ posts]

yes i know but if he puts the amp on hp he's basically eliminating all the mid bass.on full he wont and the xover separates the freq for midbass and the highs

 

[nismos14 5,000+ posts]

Midbass is generally from 60-80hz, he could set the HPF on and just eliminate unnecessary power draw. The x'over on this amp is variable from 10hz to1200hz.

 

[adio25 10+ year member]

But if I run it as 2 channel and only use RCA jack 1 and rca jack 2, how is it supposed to get the signal to the bridged 3+4 channel?

 

[nismos14 5,000+ posts]

Channel 1 acts as bridged 1/2 and channel 2 acts as bridged 3/4.

 

[dappa5 10+ year member]

rca's into ch 1 &2 switch #1 to 2ch mode switch #2 (and #3 {not labeled}the x-over's) both on hp and hp dials to just under 100 htz then adjust input levels as needed

good luck

so ............what Nismo said lol

 

[adio25 10+ year member]

I was messing around with it before and if I remember right I did it the way you guys said but it was in mono.

 

[nismos14 5,000+ posts]

Also I would set the xover to what works the best for you allowing the most midbass while still allowing you to get as loud as you want, without too much excursion from the midbass.

 

[adio25 10+ year member]

Ok I wired it up to the way you guys said, L+R Rcas in slot 1 and 2 on amp with amp setting to 2-channel. Sounds ok I think, but when I use my balancer from the left to right it just makes both sides quieter turning it either which way. Is this normal on a 4 channel amp running in 2 channel mode?