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Old 26th June 2009, 11:13 AM   #1
soundengine355 is offline soundengine355  Australia
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I've been searching and lurking for quite some time on this forum. I've have been holding back on moving to DIY because I was never quite sure a DIY Amplifier would sound as good as a commercial i.e. McIntosh, Classe, Mark Levinson... ...even now I have a doubt.

...I've decided to use the Aussie Amplifiers nxV500 modules for a pair of mono blocks, along with the loudspeaker protection and soft start modules. For the power supply I was planning on using the Mundorf 47,000uF 80V capacitors. For input capacitors the Mundorf Mcap Supreme 3.9uF.

The toroidal will be a 800va with 55vac secondary windings.

Links:

Amplifier Modules - http://www.aussieamplifiers.com/nxv500.htm
LSP Modules - http://www.aussieamplifiers.com/lsp1.htm
Softstart Modules - http://www.aussieamplifiers.com/limiter.htm
Mundorf Supply Capacitors - http://www.soundlabsgroup.com.au/p/M...c+High+Current
Mundorf Input Capacitor - http://www.soundlabsgroup.com.au/p/M...+M-Cap+Supreme

The pair of amplifiers will be used to power two speakers the B&W 802D's and Sonus Faber Auditor M.

Preamplifier and CD player will be the Classe CP-500 and a CDP-101.

My question is to those experienced DIYers is this design going to come upto the same level as the commercial amplifiers? Is it worth the investment?
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Old 26th June 2009, 11:15 AM   #2
soundengine355 is offline soundengine355  Australia
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Old 26th June 2009, 12:57 PM   #3
AndrewT is offline AndrewT  Scotland
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the 55Vac transformer does not match the 80Vdc capacitors you have listed.

The maximum voltage from a 230:55+55Vac transformer will be approximately :
{mains voltage / 230 * 55 * sqrt(2) * [1+regulation/100] } - diode drop.
~88.8Vdc when the transformer is delivering very low output current and being fed with 240Vac + 6% tolerance.

A 50Vac transformer may push the 80Vdc smoothing caps to over voltage on a few rare occasions. 100Vdc capacitors will suit transformers upto 60+60Vac.
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Old 26th June 2009, 01:00 PM   #4
soundengine355 is offline soundengine355  Australia
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I'm only going on what is on the aussie amplifiers webpage for requirements.
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Old 26th June 2009, 02:30 PM   #5
AndrewT is offline AndrewT  Scotland
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check the numbers for your transformer and your mains voltage supplier.
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Old 27th June 2009, 12:16 AM   #6
soundengine355 is offline soundengine355  Australia
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the voltage aside, what about the sound quality of the modules compared to a commercial amplifier like classe, mcintosh or mark levinson?
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Old 27th June 2009, 12:19 AM   #7
Wavebourn is offline Wavebourn  United States
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Quote:
Originally posted by soundengine355
the voltage aside, what about the sound quality of the modules compared to a commercial amplifier like classe, mcintosh or mark levinson?
I believe it is better to ask Fast Eddy; he is the member of our forum.
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