| cpemma |
http://www.scythe-eu.com/en/product...ama-bayamp.html
Power IC: YAMAHA YDA138(D-3) Digital Power Amplifier
Runs off 12V DC, designed to replace the invariably nasty PC active speaker system using "proper" speakers. Looks decent hardware.
Anybody heard one of these, or come across the IC anywhere else? |
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| djQUAN |
| I can't see output inductors in the picture. :att'n: |
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| cpemma |
| quote: | Originally posted by djQUAN
I can't see output inductors in the picture. :att'n: |
Apparently the circuit will work without output inductors, relying on the speaker inductance (though results may be better with them). | quote: |
YDA138 has a “Pure Pulse Direct Speaker Drive Circuit” which directly drives speakers while reducing distortion of pulse output signal and reducing noise on the signal, and realizes the highest standard low distortion rate characteristics and low noise characteristics as 10W-class of output digital amplifier IC.
In addition, circuit design with fewer external parts can be made depend on the condition of use because corresponds to filter less.
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Datasheet |
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| panomaniac |
Old topic, but today I got the listen to the Scythe amp.
(Some of you will have gotten the same message from me via email.)
Played the Scythe on a pair of Planet 10 Fonken speakers. (Citypulse DAC as source - Holly Cole CD)
Well... all I can say is that a stock Kingrex T-amp walked all over it. In every way. Power, soundstage, detail, texture, channel balance, tonal balance and just pure pleasure.
That may not be fair to the Yamaha chip, the Scythe amp isn't built with the greatest parts - even though the layout and chassis build are not bad. Seems to be sensitive to power quality, too. A linear PSU sounded much better than SMPS.
It does use 2 inductors per output channel, just like other BTL amps - but they are tiny. Doubt they can take much current. Also has tiny electrolytic caps in the output filter - not the best choice. Residual RFI is not too high and seems up in about the same switching freq range as Tripath. Waveform is more sawtooth than sine - probably due to bad filtering.
If I ever get the chance I'll mod it and give another listen. Would be fun to hear if better parts will improve it. |
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