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Old 13th January 2011, 04:42 AM   #1
dkhsu is offline dkhsu  Canada
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Default Panasonic DVD-H1000 op amps worth upgrading?

Hi

I've been using my Panasonic DVD-H1000 as a cd player for awhile now. Just for fun i decided to take look at the output board..

there are a total of 8 JRC op amps, 4 - JRC 4580 and 4 - JRC 2114. (as shown in the pic)

Would it be worth while changing them to BB OPA2604/ OPA2134 ?

Thanks,
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Old 13th January 2011, 06:40 AM   #2
Mooly is offline Mooly  United Kingdom
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It might be worth trying for interest and the OPA2604 would be my choice as sonically it's an excellent performer. Two opamps in the pictures appear to be PSU related so I would not replace those... no point.
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Old 13th January 2011, 01:41 PM   #3
dkhsu is offline dkhsu  Canada
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Thanks Mooly for your reply.

the row of op amps (3) per channel are in a this arrangement

JCR 2114 - JCR 4580 - JCR 2114

would i try swapping just the 2114's for OCA2604s?

thanks
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Old 13th January 2011, 05:31 PM   #4
Mooly is offline Mooly  United Kingdom
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You can do that, or swap all 3 for the 2604.
The 4580 has a high output current capability for an opamp (around 50ma) but I find it hard to believe it swings that kind of current in an analogue stage like this.

No doubt there are sound technical reasons for the choice of opamps used but then again we can say the same for all the products that use the 5532.

You are going to have to try it.
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Old 13th January 2011, 08:37 PM   #5
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hi, opa2604 burr browns aint that good lm4652s are much better choice 2604 are a bit err brown to my taste cheers alan
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Old 13th January 2011, 08:42 PM   #6
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also use a decent set of interconnects jrc 2114s are standard in most marantz cds crap op amp first thing we rip out cheers guys alan
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Old 14th January 2011, 05:01 PM   #7
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I do recomend also the LM4562...
As for the 4580 - usually are used to drive headphones (with that high output current) and that's why sometimes are difficult to replace.
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