car amp usable as sub-amp?

[DIY_Peter]

I've seen a second hand car poweramp (2x200W) for 69$.

Can I use this amp for a subwoofer?

Do I need some extra electronics? filter?

[mikee12345]

it may be rated 200watts at 5% THD

u mite get only 100watts at 0.5% THD(like my amp which is 0.01% THD at half the Rms rating)


running a car amp in house = 240v/110V ---14v (or similar)convertor

= expensive

some ppl use batteries but they suck them dry before the charger can charge it fast enough.


computer power supplies do it,but in tiny amounts!

u could build a power supply for lots of money $ urself,switch mode supply.

if u live in US just buy a partsexpress plate amp -cheap

if u live outside US ur unlucky,like me.high shipping.


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OR do u mean run as a sub amp in your car????

if so, run your sub off it. if high notes come out, likevoices,u know u need a filter,an active Low pass filter.

dont pay lots of money $$$ for a low pass filter.
probably crossover at 70hz is good or lower.:-D

u can either buy a kit,or a working filter.

[Kay]

You can do what you want, of course,

but do you think the power rating 2x200W is correct?
Not PMPO?

best regards
Kay

[DIY_Peter]

Ok, that was a bad idea

Hadn't thought about that 12V...

[CarMan]

Yes, DC instead of AC. If you can get an AC-DC converter that is rated at as many amperes as the car amplifier is rated you can use the power fully. I did some looking into this a few years back and I think the power supply I needed for my 2x150rms (@ .05%THD, I did check first) was going to cost me something like $180. Unless they are a lot cheaper now...