Upgrading From 4558 To OPA627 Is Expensive!

dantwomey · 23rd December 2006, 10:08 PM

I was reading up on upgrading the two-channel opamps in my DVD player and found that the KIA4558F is a dual and the desired OPA627 is a single.

This requires dual OPA627's on an adapter like the one Reference Audio Mods has for $116.50!

Is there a more cost effective alternative offered by another vendor?

Regards,
Dan

jacco vermeulen · 23rd December 2006, 10:33 PM

http://cimarrontechnology.com/index....PROD&ProdID=24

Expensive parts are the Black Gate caps, personally i go for Oscon's.
The 116 buck 50 is ridiculous.

dantwomey · 23rd December 2006, 11:36 PM

Can I use the DIP version of the BrownDog adapter http://cimarrontechnology.com/index....WPROD&ProdID=9 and the 8-Pin DIP version of the OPA627 for easier soldering?
http://focus.ti.com/docs/prod/folder...topsidemarking

Regards,
Dan

kevinkr · 24th December 2006, 04:12 PM

Shouldn't be an issue if there is sufficient room. You might also take a look at the National LM4562, by many accounts it is even better sounding than the OPA627 and is a dual. (Available both in soic and pdip)

I've ordered some 4562 for my Zhaolu dac.

dantwomey · 24th December 2006, 06:07 PM

I may have jumped the gun here. I looked at my DVD player that I want to upgrade and it's all SMD. Any upgrade might require an entirely new output stage taking its feed directly from the DAC.

I will keep the forum posted.

Regards,
Dan

kevinkr · 26th December 2006, 01:53 PM

Try the soic version of the LM4562 if duals are used. SMD is not too hard to deal with...

dantwomey · 26th December 2006, 02:04 PM

My universal player has some pluses and minuses that I'm currently dealing with. One plus is that all the audio functions are on one clearly identified board. The minus is that most of the components on it are SMD. I have given the audio board a close examination with a magnifying glass and I've yet to identify any opamps. This is not a significant point because I have limited experience in electronics. I'm going to post a clear picture of the audio board somewhere down the road. But for now I'm holding off until I completely explore my options in upgrading the SMPS that supplies this unit.

Regards,
Dan

23rd December 2006, 10:08 PM	#1
dantwomey diyAudio Member Join Date: Feb 2002 Location: Canada	Upgrading From 4558 To OPA627 Is Expensive! I was reading up on upgrading the two-channel opamps in my DVD player and found that the KIA4558F is a dual and the desired OPA627 is a single. This requires dual OPA627's on an adapter like the one Reference Audio Mods has for $116.50! Is there a more cost effective alternative offered by another vendor? Regards, Dan

23rd December 2006, 10:33 PM	#2
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	http://cimarrontechnology.com/index....PROD&ProdID=24 Expensive parts are the Black Gate caps, personally i go for Oscon's. The 116 buck 50 is ridiculous. __________________ Looks like Sponge Bob has killed another thread.

24th December 2006, 04:12 PM	#4
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Shouldn't be an issue if there is sufficient room. You might also take a look at the National LM4562, by many accounts it is even better sounding than the OPA627 and is a dual. (Available both in soic and pdip) I've ordered some 4562 for my Zhaolu dac. __________________ www.kta-hifi.net

26th December 2006, 01:53 PM	#6
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Try the soic version of the LM4562 if duals are used. SMD is not too hard to deal with... __________________ www.kta-hifi.net

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23rd December 2006, 11:36 PM	#3
dantwomey diyAudio Member Join Date: Feb 2002 Location: Canada	Can I use the DIP version of the BrownDog adapter http://cimarrontechnology.com/index....WPROD&ProdID=9 and the 8-Pin DIP version of the OPA627 for easier soldering? http://focus.ti.com/docs/prod/folder...topsidemarking Regards, Dan

24th December 2006, 06:07 PM	#5
dantwomey diyAudio Member Join Date: Feb 2002 Location: Canada	I may have jumped the gun here. I looked at my DVD player that I want to upgrade and it's all SMD. Any upgrade might require an entirely new output stage taking its feed directly from the DAC. I will keep the forum posted. Regards, Dan

26th December 2006, 02:04 PM	#7
dantwomey diyAudio Member Join Date: Feb 2002 Location: Canada	My universal player has some pluses and minuses that I'm currently dealing with. One plus is that all the audio functions are on one clearly identified board. The minus is that most of the components on it are SMD. I have given the audio board a close examination with a magnifying glass and I've yet to identify any opamps. This is not a significant point because I have limited experience in electronics. I'm going to post a clear picture of the audio board somewhere down the road. But for now I'm holding off until I completely explore my options in upgrading the SMPS that supplies this unit. Regards, Dan

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