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Upgrading From 4558 To OPA627 Is Expensive!
Upgrading From 4558 To OPA627 Is Expensive!
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Old 23rd December 2006, 10:08 PM   #1
dantwomey is offline dantwomey  Canada
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Default 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.
Click the image to open in full size. Click the image to open in full size.

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
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Old 23rd December 2006, 10:33 PM   #2
jacco vermeulen is offline jacco vermeulen  Netherlands
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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.
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Old 23rd December 2006, 11:36 PM   #3
dantwomey is offline dantwomey  Canada
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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

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Dan
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Old 24th December 2006, 04:12 PM   #4
kevinkr is offline kevinkr  United States
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Upgrading From 4558 To OPA627 Is Expensive!
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.
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Old 24th December 2006, 06:07 PM   #5
dantwomey is offline dantwomey  Canada
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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
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Old 26th December 2006, 01:53 PM   #6
kevinkr is offline kevinkr  United States
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Upgrading From 4558 To OPA627 Is Expensive!
Try the soic version of the LM4562 if duals are used. SMD is not too hard to deal with...
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Old 26th December 2006, 02:04 PM   #7
dantwomey is offline dantwomey  Canada
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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.

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Dan
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