Soundstream amp!

[necros0819]

I found this amp for cheap its a soundstream pca2.760 and I think this are the specs...

No. OF CHANNELS: 2
* OUTPUT (watts):RMS @ 4 Ohms 220x2
* RMS @ 2 Ohms 380x2
* RMS @ 4 Ohm Mono 760x1
* T.H.D.: 0.02%
* FREQ. RESPONSE (Hz): 10 - 30k
* SIGNAL TO NOISE RATIO: >97dB
* DAMPING FACTOR: >200
* INPUT SENSITVITY: 0.5 - 4.0V
* CROSOVER SLOPES: 12dB
* CROSSOVER FREQUENCY: High-Pass(Hz) 50 - 600
* Low-Pass(Hz) 50 - 150
* SUBWOFFER EQ: 0 - 18dB 0
* SUBWOOFER EQ FREQ. (Hz) : 40 - 120
* DIMENSIONS (INCHES): 9.5x2.5x20.0
* Fully regulated MOSFET power supplies
* PWM circuitry
* Tri-guard amplifier protection
* IDI (Intelligent Distress Indicator) gives a visual indication of the amplifiers protection status
* Platinum RCA inputs and outputs
* Line Outputs
* Bi-linear selectable crossovers for inputs and outputs (Hi/Full/Low)
* Continuously variable high and low-pass crossovers
* Variable subwoofer equalizer
* Phase inversion switch (0 - 180)
* OEM floating ground input
* Platinum 4-gauge power connectors
* Tri-mode operation
* Optional Remote Bass Control (EGA-RM)

My question is can this amp run 2 dual voice coil 12" Soundstream subwoofers? The subs are both at 600 w each.

Thanks!

[DLYDRVN]

Depends on what the impedance is when the DVC's are configured. If they're configured for 8ohms then yes (2x8 parallel would give you 4ohms) If they're configured for 2ohms each then also yes (2x2ohm series = 4ohms or run them one per channel) If they're run for 4ohms each then no, there'd be no way to wire them up to get a 4 ohm load or a two ohm load that would be useful. (you could run them parallel for 2ohms but you'd only be getting ~190w per driver, which would be pretty low for those drivers.)

[necros0819]

Thank you for replying as i was about to give up on this post,lol!

[necros0819]

Ok I hope ome of audio gurus can maybe steer me in the right direction..

I bough this amp its in the link

http://www.sonicelectronix.com/item_5425_Soundstream-PCA2.760.html

And I also bought 2 12" VGW 12 subwoofers in a fiberglass sealed box here is the link with specs..

http://www.sonicelectronix.com/item_5459_Soundstream-VGW-12.html

Now I need someone to tell me which way I should connect this Subs to the above amp so I can get the maximum performance.

As of right now I connected the subs at 2 ohms and they were originally connected at 4 ohms when i bought them from a friend.Should I have left them the way they were or did I do the right thing.

They really pound hard right now but I was just wondering if i did the right thing cause i don't wanna screw everything up.

Thank You in advance and I have learned a lot ever since I joined this forum.
Thank You everyone!

[DLYDRVN]

Can you clarify: the entire box is running 2ohms nominal or you've configured each driver at 2 ohms?

If the drivers are configured at 4 ohms and wired in parallel so the cab is nominally 2, and you're running in bridged mode on the amp then yes, you've done everything right and enjoy the pound.

[necros0819]

I have each driver configured at 2 ohms and they are originally 4 ohms. Im trying to find a diagram or something to help my self out and connect them properly.
Is this diagram correct for my setup?
http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2DVC_4-ohm_2ch-br.jpg

Thank you for the reply by the way.

[DLYDRVN]

Yes. That diagram should be correct if they are dual 4ohm coils. Run like that and you should get full bridged power to those drivers.

[necros0819]

Thank you again for the input.Also I was trying to tune the amp with a multimeter but was unsure on how to go about calculating the correct value.My amp is 1500 w peak and 750 rms so should i use the peak power or the rms power and multiplied with the ohms of the sub or the ohms of the amp.I have watched a few videos of this being done and still couldn't understand.Maybe I'm having a blond moment i don't know and no offense to blond people.Or should I take it to a audio shop and have them tune it for me?

Cheers and thank you!

[DLYDRVN]

If by "tune" the amp you mean set the gain properly? You can't really do it with just a multimeter. I mean you sort of can, but it's fiddly enough hat you might as well use your ears. If you really want to gain stage properly you should have a scope so you can actually see when clipping is happening.

As far as setting via voltage, Watts is V^2/R. Take your voltage reading, into a dummy load or the speaker if you can handle the volume, square that value and divide by the nominal impedance of the speaker. That will give you the wattage output. But again, this doesn't mean much if you're trying to set the gains properly. you need to either SEE or HEAR clipping begin to happen. Generally by starting with gains all the way down and crank the output of the deck until you hear clipping, then back off the deck a little bit to your desired "max" volume number, then raise the input gains on the map until you hear clipping and back off a bit. If you do it by ear it's a very imprecise way to do it, the voltmeter will only let you know what the actual output looks like. With a scope you can properly see the onset of clipping and you can set your gains accordingly.

The basic premise with gain staging in this situation is you want the output of the deck at an optimum level (for peaks) without driving the inputs of the amp to hard, and you want the gains on the amp as low as possible to keep noise floor low, while still getting the output level you want.

[necros0819]

LOL in other words take it to a shop and have them do it since I dont have a scope or know where i can get one.
Thanks for responding I did learn stuff that i never knew.

Cheers!