O Audio plate amps

quickshift · 24th July 2008, 02:04 PM

http://www.oaudio.com/300W_SUBAMP.html

Has anyone used or heard one of these?

I need a couple of plate amps and these look OK and are certainly not expensive. $400 for 2 of 300w amps delivered to the UK.

Grumpy_Git · 24th July 2008, 02:07 PM

These look like the BASH amps also available from parts express.

quickshift · 24th July 2008, 02:22 PM

Quote:

Originally posted by Grumpy_Git
These look like the BASH amps also available from parts express.

They do look very similar, identical functions and spec from what I can see but slightly different control placement and one has an LFE input.

Are the PE BASH amps any good?

DonoMan · 24th July 2008, 05:10 PM

They are better than the PE ones because the PE ones have fixed high-pass filters.

In addition, the O-Audio 500W one also has a parametric equalizer (just one band though).

I have the 500W. I love it. It barely gets warm even when it's cranked.

If I had to do it all over, though, I'd get a rack amp. instead. But I'd stick to Class-H or D.

quickshift · 28th July 2008, 08:30 AM

Thanks DonoMan.

I'll give the O Audio amps a try.

holdent · 28th July 2008, 05:02 PM

I looked at the specs for both the 300w and 500w OAudio plate ampson OAudio's web site and think DonoMan is wrong in two ways:
1. Either OAudio amps do not appear to have have a variable high pass filter as implied.
2. The PE 500w equivalent (URL=http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=300-806]Dayton HPSA500[/URL]) does have similar parametric equilizer (and similarly also doesn't have a high pass filter).

I went with the cheaper PE 240w plate amp because its roughly half the cost and and has provision for speaker and line level inputs. It has a fixed high pass filter set at 160 Hz for 8 ohms but I don't use it. The high pass filters in most(?) plate amps are invariably a simple 1st-order crossover that frequently requires the addition of a passive impedence flattening circuit for the satellite to maintain a flat freq. response.

I would hazard that the higher end 500w plate amps don't include a high pass filter because they count on you connecting your satellites to a HT receiver and solving the high pass crossover problem within the receiver.

Sergelisses · 29th July 2008, 09:59 AM

http://cgi.ebay.com/Reckhorn-Subwoof...742.m153.l1262

Cheaper and all you want for the satellite

Serge

holdent · 29th July 2008, 03:05 PM

Yes this would be a good solution but as noted on this link "Note: this item can not ship to Finland, Germany, Switzerland and Canada". I wonder why...

Sergelisses · 29th July 2008, 03:31 PM

I think the price is more expensive in these countries

Serge

ocool_15 · 29th July 2008, 03:32 PM

Quote:

Originally posted by holdent
Yes this would be a good solution but as noted on this link "Note: this item can not ship to Finland, Germany, Switzerland and Canada". I wonder why...

Could it be because those places already have a retailer? Creative sound carries these in Canada. Creative Sound

24th July 2008, 02:04 PM	#1
quickshift diyAudio Member Join Date: Jun 2005 Location: West London	O Audio plate amps http://www.oaudio.com/300W_SUBAMP.html Has anyone used or heard one of these? I need a couple of plate amps and these look OK and are certainly not expensive. $400 for 2 of 300w amps delivered to the UK.

24th July 2008, 02:07 PM	#2
Grumpy_Git diyAudio Member Join Date: Oct 2001 Location: London, England	These look like the BASH amps also available from parts express. __________________ Real Engineers do it on a budget.....

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24th July 2008, 05:10 PM	#4
DonoMan diyAudio Member Join Date: Feb 2005 Location: Massachusetts	They are better than the PE ones because the PE ones have fixed high-pass filters. In addition, the O-Audio 500W one also has a parametric equalizer (just one band though). I have the 500W. I love it. It barely gets warm even when it's cranked. If I had to do it all over, though, I'd get a rack amp. instead. But I'd stick to Class-H or D.

28th July 2008, 08:30 AM	#5
quickshift diyAudio Member Join Date: Jun 2005 Location: West London	Thanks DonoMan. I'll give the O Audio amps a try.

28th July 2008, 05:02 PM	#6
holdent diyAudio Member Join Date: Nov 2005 Location: Ontario	I looked at the specs for both the 300w and 500w OAudio plate ampson OAudio's web site and think DonoMan is wrong in two ways: 1. Either OAudio amps do not appear to have have a variable high pass filter as implied. 2. The PE 500w equivalent (URL=http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=300-806]Dayton HPSA500[/URL]) does have similar parametric equilizer (and similarly also doesn't have a high pass filter). I went with the cheaper PE 240w plate amp because its roughly half the cost and and has provision for speaker and line level inputs. It has a fixed high pass filter set at 160 Hz for 8 ohms but I don't use it. The high pass filters in most(?) plate amps are invariably a simple 1st-order crossover that frequently requires the addition of a passive impedence flattening circuit for the satellite to maintain a flat freq. response. I would hazard that the higher end 500w plate amps don't include a high pass filter because they count on you connecting your satellites to a HT receiver and solving the high pass crossover problem within the receiver.

29th July 2008, 09:59 AM	#7
Sergelisses diyAudio Member Join Date: Nov 2003 Location: Near PARIS	http://cgi.ebay.com/Reckhorn-Subwoof...742.m153.l1262 Cheaper and all you want for the satellite Serge

29th July 2008, 03:05 PM	#8
holdent diyAudio Member Join Date: Nov 2005 Location: Ontario	Yes this would be a good solution but as noted on this link "Note: this item can not ship to Finland, Germany, Switzerland and Canada". I wonder why...

29th July 2008, 03:31 PM	#9
Sergelisses diyAudio Member Join Date: Nov 2003 Location: Near PARIS	I think the price is more expensive in these countries Serge

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