Professional means nothing these days. The data sheet tells the technical story and its possible suitability for any intended use. Your ears and long term listening will tell you if the device provides a long term satisfying experience.
(and that opamps differ should come as no surprise. Take half a dozen 50 to 100 watt amps of similar on paper specs and listen to each at a couple of watts (normal listening levels) and you would expect them to sound very different. So it is with opamps, each is unique sonically although in some cases the differences are subtle)
(and that opamps differ should come as no surprise. Take half a dozen 50 to 100 watt amps of similar on paper specs and listen to each at a couple of watts (normal listening levels) and you would expect them to sound very different. So it is with opamps, each is unique sonically although in some cases the differences are subtle)
For bjt (transistor input) I would suggest he LM4562, NE5532 or LM833. They are the three that are the consistently best performers. There are countless others, 4558, 4560, 4556, 2068 etc etc.
For FET input the OPA2604 and OPA2134 types are recommended. The TL072 is surprisingly capable too... don't believe all you read... try it.
For FET input the OPA2604 and OPA2134 types are recommended. The TL072 is surprisingly capable too... don't believe all you read... try it.
+1 for TL07x series - particularly at the price of the TL074 (0.6rmb or around $0.10 for a quad). Unbeatable for the money but do watch the load resistance - I prefer above 22k and bias the output into classA with a resistor to VEE.
My Yamaha RX-V667 has similar opamps and I wonder if I can improve soundstage and some details by changing them.
Will better opamp can do that?
Thanks.
SOIC, low distortioin, fast, and lots of current output in case you plug headphones into this output:
ADA4898
http://www.analog.com/media/en/technical-documentation/data-sheets/ADA4898-1_4898-2.pdf
Just posting picture from service manual-
Page 82
http://archive.espec.ws/files/RXV667_HTR6063_RXA700[1].pdf
Page 82
http://archive.espec.ws/files/RXV667_HTR6063_RXA700[1].pdf
An externally hosted image should be here but it was not working when we last tested it.
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Unfortunately not a schematic but a block diagram with a lot of details removed.
The link of service manual I posted has it I suppose.Please check the link.
Page 115 -http://archive.espec.ws/files/RXV667_HTR6063_RXA700[1].pdf
posting one of it-
An externally hosted image should be here but it was not working when we last tested it.
IC 458 is NJM4565
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http://archive.espec.ws/files/RXV667_HTR6063_RXA700[1].pdf
Full diagram-
Full diagram-
An externally hosted image should be here but it was not working when we last tested it.
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There is no distortion.I was just wondering if I can improve the sound further.
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