Can 1 SMPS power supply be used for 2 amplifier kits ? and...Stereo amp to both subwoofer coils or mono amp to paralleled sub coils ?

[jst]

Can 1 SMPS power supply be used for 2 amplifier kits ?

The image below is the illustration.

But my main question is the power supply powering TWO ZK-3002 (TPA 3255 kit).
Also, usually in 2.1 system we use MONO (pbtl) but in this case it's 2.2 but using BOTH coils from the subwoofer, is it better to use a double coil subwoofer like that or is it better to parallel it and use a mono/pbtl amp ?

I never play music to like insane volume because it's too noisy and harsh playing it too loud indoor. And in my normal listening volume, my aiyima a07 tpa3255 usually only uses 8-10 watt of power. So if I use two it will be only like 20 watt max. Will the smps be able to withstand two loads of tpa3255 kit ?

 

[DVDdoug]

You can double-check the current requirements but 7 Amps should be plenty for both. The same voltage is applied to both so that doesn't change (as along as everything is working correctly) but they both draw their own current. With nothing connected no current flows. When two amplifiers are connected, twice the current flows.

The current also depends on how much power the amplifiers are putting out.

That's not necessarily true. The "weak link" is (usually) the record itself, especially the noise.

You should NEVER parallel OUTPUTS. That also goes for line-outputs.

Inputs can be wired in parallel, and speakers (or speaker coils) can be wired in parallel, but the impedance is cut in half (with two in parallel) so that's twice the current and twice the power and the amplifier has to be capable of driving the lower impedance.

 

[jst]

You can double-check the current requirements but 7 Amps should be plenty for both. The same voltage is applied to both so that doesn't change (as along as everything is working correctly) but they both draw their own current. With nothing connected no current flows. When two amplifiers are connected, twice the current flows.

The current also depends on how much power the amplifiers are putting out.

That's what I think, 7 amperes or 350 watt is plentyful because my listening volume definitely will never even reach half of it even with two amplifier kits.

So it will work then, connecting it that way.

You should NEVER parallel OUTPUTS. That also goes for line-outputs.

Ok, noted

Inputs can be wired in parallel, and speakers (or speaker coils) can be wired in parallel, but the impedance is cut in half (with two in parallel) so that's twice the current and twice the power and the amplifier has to be capable of driving the lower impedance.

I mean, in my case above, is it better to : 1 or 2 ?
1. bridge or pbtl the zk-3002 kit first to make it mono (2ohm) and parallel the subwoofer's double coils to 2 ohm,
2. exactly as the image above using stereo spk out to each of the subwoofer coil.
---
Nvm, I think 1 is better or what most ppl prefer after googling.

 

[AnalogSteph]

Looks like ZK-3002 only has unbalanced input? This is likely to give you one hell of a ground loop there. Many a DIY boombox project has been plagued by this issue. You will need a galvanic line-level isolator between EQ and the ZK-3002 for the satellites. The EQ will have a separate power supply, I guess (11-19 V, <<1 A)? At least it should.

 

[jst]

Looks like ZK-3002 only has unbalanced input? This is likely to give you one hell of a ground loop there. Many a DIY boombox project has been plagued by this issue. You will need a galvanic line-level isolator between EQ and the ZK-3002 for the satellites. The EQ will have a separate power supply, I guess (11-19 V, <<1 A)? At least it should.

The zk-3002 input will need a XH-2.54-3P to RCA converter.

Ppl usually use 12v 2Ampere black brick adaptor for the eq, I read 1A is reported to have problem.