Current Yamaha AV receivers (RX-V 559): what kind of output stage? - diyAudio
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Old 24th April 2007, 04:15 PM   #1
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Default Current Yamaha AV receivers (RX-V 559): what kind of output stage?

What kind of output stage and DAC does Yamaha currently use?

I peaked into an RX-V 459 and 559, and from what I could see through the lid, they are using 5 pin ICs. These could be real ICs or transistors with built-in bias diodes. Anybody know?

Also, there was an SSOP28 chip with the BB label, but I couldn't read the model. I assume that was the ADC, as they'd surely use an 8 channel DAC.

Background is that I need a cheap base for a 3-way active XO, and I like to modify my DACs and output stages.
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Old 24th April 2007, 09:09 PM   #2
jaycee is offline jaycee  United Kingdom
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Probably Sanken SAP output devices, in which case the output is most likely an EF stage.
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Old 25th April 2007, 01:30 AM   #3
Leolabs is offline Leolabs  Malaysia
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Search for the service manual of them might help.
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Old 26th April 2007, 04:24 AM   #4
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Yes. if I had found a service manual on the web, I wouldn't have asked.

I also thought that those were SAP devices, except the writing on the PCB said ICxxx. I couldn't read the writing on the thingies themselves, unfortunately.
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