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A guide to building the Pass F4 amplifier.
A guide to building the Pass F4 amplifier.
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Old 17th September 2018, 04:39 PM   #1081
albertli is offline albertli  Canada
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My F4 has been on for 16 hrs since last night. The temperature seems very stable @50c on MOSFET, 52c on heatsink at 200mV. Offset is within range.
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Old 17th September 2018, 04:55 PM   #1082
adason is offline adason  United States
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I like your washers!
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Old 17th September 2018, 08:24 PM   #1083
albertli is offline albertli  Canada
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I like your washers!
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Old 17th September 2018, 08:27 PM   #1084
albertli is offline albertli  Canada
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Sound exactly the same with mine which made some 10 years ago. Lovely sound. 😄😄
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Old 17th September 2018, 08:44 PM   #1085
mrdave45 is offline mrdave45  United Kingdom
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That's great to know albertli. I built one a couple of years ago and am thinking about another and I was slightly concerned they wouldn't be adequately matched so that I would have to use them biamped. I have the impasse to drive them balanced so want to try that. Although Im not sure I really need 100w per side, Im not sure whether 100w balanced per side with short speaker cables or 25+25 per side with long speaker cables and biamped will be better.
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Old 17th September 2018, 10:31 PM   #1086
albertli is offline albertli  Canada
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That's great to know albertli. I built one a couple of years ago and am thinking about another and I was slightly concerned they wouldn't be adequately matched so that I would have to use them biamped. I have the impasse to drive them balanced so want to try that. Although Im not sure I really need 100w per side, Im not sure whether 100w balanced per side with short speaker cables or 25+25 per side with long speaker cables and biamped will be better.
I build this one for friend. I finished mine some ten years ago. All my speakers are over 90db so I don't need anything bigger than this. I presume you like your impasse pre, do you have tried other preamp to drive your F4? I have been using the Convergent SL1 signature and the MFA . Both are good but I like the MFA better with more power to drive my F4.
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Old 17th September 2018, 11:26 PM   #1087
mrdave45 is offline mrdave45  United Kingdom
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Yeah, using the impasse. What's the mfa? My open baffles are about 94db and go thunderous with just one f4. I think that biamping would probably be the better solution over the extra power but loss of damping factor.
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