SYMEF amplifier

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OnAudio

OnAudio

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Joined 2011
There are many amplifier standards. Instrumentation vs audio amplifiers also have different standards. So which is the most enjoyable amplifier standard. Heres another way to do the symef by our standards.
SYMEFtype3.png
 
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OnAudio

OnAudio

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Joined 2011
According to post 1177 and 1178, here's celebrating symef in all its diversity. It is important to let your ears decide. One thing to consider is..If one thing came apart, would the whole amplifier come apart? Type 4 is life on the fast lane. There's a good reason gen 1 to gen 3 SYMEF owners don't get separated from their amplifiers.
SYMEFtype4.png
 
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minek123

minek123

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OnAudio said:
There are many amplifier standards. Instrumentation vs audio amplifiers also have different standards. So which is the most enjoyable amplifier standard. Heres another way to do the symef by our standards.
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This is simplified Hafler P700 with different output stage..
Current through D13 is 36mA. 5mA will be sufficient. R33 should 5k6 or more. As it is both of them are dissipating way to much heat.
Otherwise, it's interesting. Hafler P7000 supposedly sounded very good..
 
OnAudio

OnAudio

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Joined 2011
Suitable power supply capacitors https://www.digikey.com/en/products...er-electronics-cde/382LX333M080B092VS/2256594
https://www.digikey.com/en/products/detail/nichicon/LNT1K333MSE/2549067

SYMEF TYPE S
AN-5440 - 500VA 40V X2 TRANSFORMER DUAL MONO per channel
120 Watts 8Ohm 0.01% THD (33000u per rail)
209 Watts 4Ohm 0.02% THD (33000u per rail)
306 Watts 2Ohm 0.05% THD (33000u per rail)(Transformer overdrive by 1.5, manufacturer accepted rated overdrive 1.2,efficiency < 50%)


SYMEF TYPE S
AN-5445 - 500VA 45V TRANSFORMER DUAL MONO per channel (Amp Resting +/-63volts)
165 Watts 8Ohm 0.01% THD (33000u per rail)
277 Watts 4Ohm 0.02% THD (33000u per rail)
417 Watts 2Ohm 0.06% THD (33000u per rail)(Transformer overdrive by 1.7, manufacturer accepted rated overdrive 1.2,efficiency < 50%)
 
OnAudio

OnAudio

Member
Joined 2011
Most amplifiers are voiced as tweeter amplifiers due to customer preferences. If you notice many amplifiers have no bass definition and are difficult to use when mixing bass or drums, bass sounds like a single muddy tone. The next batch of amplifiers are voiced as midrange amplifiers. Very few amplifiers are voiced as bass amplifiers. But we do have Chameleons for example here's the voicing for the amplifier in this post https://www.diyaudio.com/community/threads/symef-amplifier.198500/post-7418716. It will get you there but it isn't a king but a prince its more like a full range speaker. There's a cult following for such voicings.
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