4-channel to 1-channel for sub?

[bikinpunk 10+ year member]

My friend has a Power Acoustik sp4x-600 amp. It does 70w x 4 and can be bridged to 175x2 rms. He has a sub to power and the person he got the setup from apparently was using this amp to power the sub. I don't see how you could do this, but maybe it's possible? I"m only familiar with 2-channel and mono amps for sub.

http://www.cardomain.com/item/POWSP4X600

Here's the specs:

* Amplifier Type: Multi-Channel

* RMS Power @ 4 Ohms: 70W x 4

* THD at 4-Ohm RMS Power: 0.02 %

* Bridged RMS Power @ 4 Ohms: 170W x 2

* Speaker Level Inputs: yes

* Preamp Outputs: no

* Built-In Crossovers: HP/LP

* Bass Boost: 0 or 18 dB

* Frequency Response: 20-30,000 Hz

* Signal to Noise Ratio: 97 dB

* Fuse Rating: n/a

Click to read more...

 

[bikinpunk 10+ year member]

Sub is DVC 4 ohm. Could I just bridge 4 into 2 channels and give each VC 170w rms?

 

[chucku 10+ year member]

I think that will work.

 

[bikinpunk 10+ year member]

Yea, my setups have only had 1 sub and a mono amp, so wiring is straight-forward. When he brought in the 4-channel amp I was like, "uh-oh", but after seeing the sub is DVC I figured we could just bridge into 2 sets of channels and give the sub a total of 340 watts RMS.

 

[LinxuS 10+ year member]

Since it's a Dual voice coil

and you have 2 x 175 RMS.

Assuming that it's a DVC 4 ohm.

Put 175 RMS on each voice coil.

Make sure you set the gains EXACTLY the same for each coil [via DMM most likely].

 

[musclehead 10+ year member]

MTX TA7804

100X4

200X4

400X2

800X1

very nice amp. had one, just sold it to a friend. very under-rated

 

[bikinpunk 10+ year member]

Since it's a Dual voice coiland you have 2 x 175 RMS.

Assuming that it's a DVC 4 ohm.

Put 175 RMS on each voice coil.

Make sure you set the gains EXACTLY the same for each coil [via DMM most likely].

Good deal. Thanks.

 

[bikinpunk 10+ year member]

Well, found out that the sub is 2 ohm. Does this help me at all? I don't really see how it would.

This is how I have it wired now:

I just suggested he get a nice mono amp, and use his 4-channel to power his door speakers when he upgrades later.

 

[///M5 10+ year member]

Or just sell that amp and get something that will work even better.