JRC5534 replacement for IV section ??? - diyAudio
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Old 18th March 2007, 06:44 PM   #1
wongmb is offline wongmb  Canada
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Default JRC5534 replacement for IV section ???

My Shanling CD300 (North American version) comes with JRC5534 in the IV section. I notice the Asia version has AD847. I thought AD847 is a way better chip. Wonder why North American version got a **** chip Or am I wrong and the 5534 is actually better for IV section ?

What is a direct replacement for the JRC5534 other than AD847 ?

The circuit uses JRC5534 at IV section and OPA627 in the differential stage right now. I have modded a Shanling T-200 before with all OPA627 and the sound is too much (I prefer a mix of OPA627 and OPA2132 in that particular machine.)

Since it uses 4 on each channel (pic shows one side only), I need a total of 8. OPA627 is out of the question even if its superior given the cost.

Any advice/thoughts ?
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Old 18th March 2007, 07:51 PM   #2
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The OPA134 would gives a good balance with OPA627, in my opinion. Did exactly that in a Denon DCD2560 I had & it sounded great. Can't imagine why the 5534 except for corner-cutting to save cost. You could, of course, use an OPA132, but I think the OPA134 is much better & is cheaper.
Why you would want to rely on a player that uses the criminally crappy CDM12 series transport that you'll likely have to replace every year or two is quite beyong my imagining, though.
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Old 18th March 2007, 10:08 PM   #3
wongmb is offline wongmb  Canada
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Stephansank:

Any hands on experience with the AD847 or AD825 ?

I realize the first batch of my cdp are equipped with AD847. Since then they start using NJM5534 only.
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Old 19th March 2007, 01:12 AM   #4
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To my ears, the AD847 & AD825 sound a bit on the sterile, dry side compared to the OPA134.
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Old 19th March 2007, 04:31 AM   #5
wongmb is offline wongmb  Canada
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Also is there any difference between NE5534 and NJM5534 or JRC5534 ? I notice NE5534 is made by TI while the other 2 are made by JRC. NE seems to be almost double the price of the NJM or JRC. Is it because NE is a better spec ?
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Old 19th March 2007, 05:02 AM   #6
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I think the TI NE5534 is just as bad as the JRC NJM5534, but JRC is definitely widely considered the worse chip maker. I am sure the specs are identical on paper, but failure rate is probably higher on the JRC version.
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Old 19th March 2007, 09:14 AM   #7
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NE5534 is not a bad opamp, on the contrary.

There are just sonically beter but also more expensive types out there. OPA627 is a good replacement.
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Old 20th March 2007, 06:08 AM   #8
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Sorry, Jean-Paul, but the NE5534 in any form is an antiquated design & a terrible sounding opamp. And, to my ears, the OPA134 is, in many applications, a superior sounding chip to the expensive OPA627, and is around $2 each in USA, not to mention is also available in dual & quad forms.
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Old 20th March 2007, 07:52 PM   #9
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Accuphase uses JRCs

Recently opa2604s made problems in a sony gic filter replacing NE5532s...
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Old 20th March 2007, 09:42 PM   #10
wongmb is offline wongmb  Canada
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Thanks guys for your input. This is my plan:

replace the OPA2604 with OPA2132 (I have a few lying around somewhere I believe)

replace the JRC5534D with OPA134 or OPA627 (prob start with OPA134 first as they are way cheaper than 627)

I assume that should be 100% compatibility ??

Regarding burn-in, how much time does it take an opamp to "burn-in" properly ?
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