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Thread: need advice on subwoofer amp
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- 05-01-2008 07:50 PM #1
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need advice on subwoofer amp
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I recently purchased a refub Onkyo TXSR505. All of my speakers are in wall including my sub. Here are the specs 10", 150 Watts, Frequency Response: 26Hz – 200Hz + 3 dB, Efficiency / Sensitivity: 98dB @ 1 watt 1 meter, 8 Ohm.
I am clueless on what I need to power it.
Would something like this be ok?
Audio Source - 160W Bridgeable 2-Channel Home Theater Amplifier - AMP100
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- 05-01-2008 07:50 PM # ADS
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- 05-04-2008 10:42 PM #2
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It would probably work if you have a crossover and shop somewhere other than the ripoff that is Best Buy/Circuit City. XD
http://www.partsexpress.com/pe/showd...number=302-601
- 05-20-2008 10:35 PM #3
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Ok 2 more questions.
1. do I still need a crossover if I am using the sub preout? I thought low bass was turned off to all the other speakers when using the preout and only distributed to that port. Does it still pick up some mid's and high's?
2. The only crossovers I can find are for car speakers or for putting in a box. Any advice?I'M THE REAL TIPPY TOM!!!
- 05-21-2008 10:18 AM #4
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1. No, and not as far as I know.
2. Do you have more specs on your speakers? Your sub probably has a built-in crossover and I'd be pretty surprised if it wasn't already amplified.
- 05-21-2008 10:29 AM #5
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- 05-21-2008 11:52 AM #6
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most subwoofer outputs on common receivers are full range and rely on the low pass filter built into most subwoofers. The state of art is generally a powered subwoofer these days.
The auto crossover should work fine, as a crossover is a crossover. It is basically a low pass filter, with series inductance and parallel capacitance, either with passive components or active simulation through op amps. I would probably use a passive design with an 80 Hz fixed cutoff.
I would also shop around for a used amp. You can find real bargains with stuff like integrated amps where one channel is blown. A lot cheaper than the BB junk you are looking at.
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