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Multi-Way Conventional loudspeakers with crossovers

car amp usable as sub-amp?
car amp usable as sub-amp?
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Old 10th April 2003, 12:53 PM   #1
DIY_Peter is offline DIY_Peter  Belgium
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Default car amp usable as sub-amp?

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?
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Old 10th April 2003, 11:44 PM   #2
mikee12345 is offline mikee12345  New Zealand
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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.


-------

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.
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Old 11th April 2003, 12:55 AM   #3
Kay is offline Kay  Germany
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Location: Emden
You can do what you want, of course,

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

best regards
Kay
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best regards
Kay
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Old 11th April 2003, 05:55 AM   #4
DIY_Peter is offline DIY_Peter  Belgium
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Ok, that was a bad idea

Hadn't thought about that 12V...
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Old 12th April 2003, 05:29 PM   #5
CarMan is offline CarMan  United States
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Location: Reno
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...
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