what amp can do this?

[trevor87 5,000+ posts]

Looking for a decent amp to run some comps and a small sub.

What amp would run some 6.5 comps on 2 channels and then put out about 300 rms bridged on the last channel for a small 8" sub?

Also how do you hook that up? do you use separate rca cables for the channels or use the filter to tune the sub? never messed with a 4 channel amp?

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[Buck 5,000+ posts]

You use the first two channels to run your comps and then bridge the rear channels to run a sub.

There are very many choices in 4 channel amps that will do this.

 

[skmfkr 5,000+ posts]

mb quarts dsc4125

 

[C o l i n]

I'm looking to do virtually the same thing but I need my amp to fit under my driver's seat. If that MB Quart was smaller it'd definitely be on my list.

The Alpine PDX-4.100 or PDX-4.150 also fit the bill, although are more pricey than the MB. JL HD600/4 would also work, but again, is pretty pricey.

As buck said, run your front channel rca's to the front channel on the amp, then power the comps through the front channel on the amp. Run your sub signal on the rear or sub rca's from your headunit to the rear channel on the amp. Bridge those speaker wires and send to your sub. Quick search will show you some wiring diagrams for bridging and or series/parallel wiring if you have a dual voice coil sub.

Subscribing to see what other amps people recommend...

 

[trevor87 5,000+ posts]

someone else told me about that MB. But does it do rated power? and is it a good sq amp? also whats it do bridged to the sub i see it says 500x2 so whats that for one sub?

 

[thefordmccord 10+ year member]

kicker KX 550.3

 

[C o l i n]

In your configuration (according to the specs I found) you'd have

125x2 @ 4ohm for your front components

500x1 @ 4ohm for your sub

It does seem strange to me that it would run that much to your sub though. When running all 4 channels it'll run 500w rms (125x4) but when bridged to 2 channels it'll run 1000w rms (500x2)?? I don't understand how it doubles it's power just by bridging. I would have expected it to run closer to 250x2 when bridged... But I'm a noob, so someone feel free to explain the logic if they'd like.

 

[trevor87 5,000+ posts]

yea im not sure it would do 500 rms lol

 

[misfit138 5,000+ posts]

yea im not sure it would do 500 rms lol

The DSC4125 may or may not do EXACTLY what it's rated for, but it's still good power for very little money. Can't beat it for $136 shipped...

 

[trevor87 5,000+ posts]

im thinking of bout getting that amp and some pg rsdc65 just need to find a sub for it and ported or sealed

 

[misfit138 5,000+ posts]

A pair of 8" ID v.3's would do nicely. http://www.woofersetc.com/p2644/ID8V3D4--Image-Dynamics-ID-8"-Subwoofer.htm

 

[trevor87 5,000+ posts]

not running a pair. i only want one

 

[Ineed$ 10+ year member]

It does seem strange to me that it would run that much to your sub though. When running all 4 channels it'll run 500w rms (125x4) but when bridged to 2 channels it'll run 1000w rms (500x2)?? I don't understand how it doubles it's power just by bridging. I would have expected it to run closer to 250x2 when bridged... But I'm a noob, so someone feel free to explain the logic if they'd like.

When you bridge 2 channels at 4 ohms each channel is seeing 2 ohms. According to the specs each channel will do 250watts at 2 ohms. So if u were to bridge channels 3 and 4 together at 4 ohms that would equal 500 watts.

 

[trevor87 5,000+ posts]

http://www.edesignaudio.com/product_info.php?cPath=1_21&products_id=33

what about 2 of those on each channel?

or maybe their 8" sub bridged? or one of the tangband 8s?

 

[jonny101abc 10+ year member]

get a PG Xenon 200.4

rated at 4x200w @ 1-4ohm, and 2x400w @ 2-8ohm bridged

both of mine do almost 950 watts each