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Looking for cheap but good quality subwoofer amp stable at 1 ohm load

Posted on October 12, 2011 at 11:15:18

Posts: 252
Location: So Cal.
Joined: May 7, 2005
I'm looking for a subwoofer amp which has hugh power and current and important is stable at 1 ohm load. 1k is budget limit, under $500 is better. Suggestion for used or new are welcome.


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I would not recommend 1 Ohm load for any pwr amp, posted on October 12, 2011 at 16:34:45
Alpha Al
Industry Professional

Posts: 2381
Location: N. Carolina
Joined: February 16, 2004
December 3, 2015
Unless your speaker cable is very large gauge, your cable resistance would be almost half of the working load, resulting in major power loss.


Class D plate amp (nt), posted on October 13, 2011 at 06:38:20
Pro Sound Guy



RE: Looking for cheap but good quality subwoofer amp stable at 1 ohm load, posted on October 24, 2011 at 00:07:12

Posts: 444
Location: Vancouver Island
Joined: January 27, 2009
I've speculated that it should be possible to tie the output sections of a stereo amp together so they're driven as a single channel from one channel's driver stage. MOSFETS could be most amenable to this since they're a mostly capacitive load, which should have a negligible effect at subwoofer frequencies.

A more cookbook approach which may have a higher probability of success is to use a suitable number of chip amps in parallel. Bridged if you want crazier power.

Otherwise, why bother, unless you have some esoteric subwoofer with a 1 ohm voice coil (like a DIY ContraBass)? Power amps are relatively dirt cheap thanks to "made in China". And, keep in mind that you maybe don't REALLY need as much power as you think for home use. I (temporarily) swapped in a fanless 40 wpc stereo amp (instead of a 400 wpc pro amp) and my subs were still plenty loud.


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