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A Directory of Apex Audio Amplifiers - Chapter 2
A Directory of Apex Audio Amplifiers - Chapter 2
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Old 29th June 2020, 01:04 PM   #11
xrk971 is offline xrk971  United States
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A Directory of Apex Audio Amplifiers - Chapter 2
Almost all +/-35v amps will work at +/-25v. You just need to adjust some of the resistors that control the bias current into the input stage and VAS as they will be lower than optimal. However, they will sound pretty good. I would say, pick an amp and play with it in LTSpice to get the new setpoints. Or ask Apex Audio to reconfigure it for you.
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Old 29th June 2020, 01:44 PM   #12
Hiten is offline Hiten  India
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Since there are many versions, which would be a go to Apex amplifier of more or less than 100w, which is built, tested (may be refined later on) and well documented ?
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Old 29th June 2020, 01:51 PM   #13
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A Directory of Apex Audio Amplifiers - Chapter 2
The FH9 has been pretty well liked by all who built it. I have made a version of it with better spec’d parts and superior layout called the FH9HVX. It achieves 100w with only a single output pair of Fairchild MOSFETs. Sound is beautiful and powerful.

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Old 30th June 2020, 02:05 AM   #14
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Thanks xrk971.
 

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