Panasonic DVD-H1000 op amps worth upgrading?

dkhsu · 13th January 2011, 04:42 AM

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,

Mooly · 13th January 2011, 06:40 AM

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.

dkhsu · 13th January 2011, 01:41 PM

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

Mooly · 13th January 2011, 05:31 PM

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.

bikeral10 · 13th January 2011, 08:37 PM

hi, opa2604 burr browns aint that good lm4652s are much better choice 2604 are a bit err brown to my taste cheers alan

bikeral10 · 13th January 2011, 08:42 PM

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

SoNic_real_one · 14th January 2011, 05:01 PM

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.

13th January 2011, 06:40 AM	#2
Mooly diyAudio Member Join Date: Sep 2007	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. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

13th January 2011, 05:31 PM	#4
Mooly diyAudio Member Join Date: Sep 2007	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. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Burr Brown op amps,in amps,power op amps for sale	magneticnorth	Vendor's Bazaar	1	23rd September 2010 10:50 PM
Upgrading op amps in a Denon DCM-460 CD player	stank0	Solid State	0	18th January 2010 05:47 PM
Panasonic DVD & DVD RAM, Problems,any Tech's out there.	Mooly	Everything Else	0	2nd June 2008 10:38 AM
Are this amp's transistors worth upgrading?	terrorizer	Solid State	2	29th November 2004 12:01 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

13th January 2011, 01:41 PM	#3
dkhsu diyAudio Member Join Date: Jan 2011	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

13th January 2011, 08:37 PM	#5
bikeral10 diyAudio Member Join Date: Oct 2010 Location: walsall west mids uk	hi, opa2604 burr browns aint that good lm4652s are much better choice 2604 are a bit err brown to my taste cheers alan

13th January 2011, 08:42 PM	#6
bikeral10 diyAudio Member Join Date: Oct 2010 Location: walsall west mids uk	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

14th January 2011, 05:01 PM	#7
SoNic_real_one diyAudio Member Join Date: Jan 2008 Location: Virginia	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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)