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Can I replace 4580 A338F JRC with the new OPA2209AID ?

nader erfani
Prodigy 30 points
Other Parts Discussed in Thread: RC4580, OPA2209, LM4562, OPA1612

Hi,

I would like to upgrade the opamps of my Behringer SCR2496 which have  six "4580 A338F JRC" opamps.

Saw on ti site a recommendation for the recent opa2209 to replace "RC4580". (link: http://e2e.ti.com/support/amplifiers/precision_amplifiers/w/design_notes/upgrading-op-amps-in-audio-equipment.aspx)

Is this the right choice for my project?

Many thanks for supporting a newby music enthusiast :)

 

 

  • 0
    Guru 21975 points

    Nadar,

    As the document you cite says, the OPA2209 might be a possible replacement or upgrade to a "4580-type" op amp. There is no way for us to know what type of results you might get and this is explained in the document. The OPA2209 is a superior op amp when used properly in a circuit that is designed for it. We cannot predict how it will perform in your equipment that was designed and tested using a different op amp.

    Regards, Bruce.

  • 0 in reply to Bruce Trump
    Prodigy 30 points

    Hi Bruce,

    Thank you for your quick reply. I understand the possible implementation differences. I understand now that the "4580" stands for a "type" of opamp regardless of RC or JRC prefixes. As I am a novice in the field I did not want to be mislead by similar tags while the product might be totaly different ones.

    I think I will give it a try as I have invested in the equipment to desolder these SOIC, I could always put back the original 4580s.

    I will leave the post going for some time, just in case someone has experimented these 2209 or maybe LM4562 on the Behringer scr2496. Might save me from making a mistake.

    Best wishes

    Nader

  • 0 in reply to nader erfani
    Prodigy 70 points

    While I have not used them specifically in a Behringer upgrade, I have had great success with the OPA2209 as an upgrade to 4560 and 4580 in other pieces of equipment, such as dbx, Symetrix, etc.  I think they are superb.  They have very even balance and very low noise.  All of the applications I have used them in have included adequate supply bypasses.  The chip doesn't have a particularly high slew rate, but it's the only negative I can state about it...it is wonderful otherwise.  I hope it works as well in your situation as it has in mine.

  • 0 in reply to Robert Ruiz
    Prodigy 30 points

    Hi Robert,

    Thank you for your reply. Actually yesterday I had just installed the OPA2209 in the Behringer SCR2496. First I tried the left channel and I could notice that the sound was less "in your face" but was not sure if it was better quality than the original 4580. Then I went ahead with the right channel and immediately realised the improvement. Much less pushy but impressive dynamism when the music accelerates. without instruments it is difficult to explain the differences but for example I can say that the acoustic pressure of basses is higher now because my ears "hurt" even at very low volume (I have infinity 9A speakers & Studer A68 amps), before the sound had the same loudness but it was rounder, less dynamic.

    It definitely seems to be worthwhile making this upgrade on the Behringer SCR2496, which was designed at least 10 years ago on cheap aging components, combined with improvements to PSU and coupling caps as well as a newer DAC chip I am getting an excellent performance, probably not far from what people get from a direct output modification now that I have the OPA2209.

    Best

    N.

  • 0 in reply to nader erfani
    Prodigy 70 points

    Hi Nader,

    I'm glad you had a positive experience with your change to OPA2209.  I personally don't think there's anything fatally wrong with the 4580's...we all know how very many pieces of pro audio gear they are in!  However, I feel the same way you do.  You used the terms "in your face" and "pushy" to describe the sound of the 4580, and I have often used terms like "agressive", "edgy", and "harsh".  No matter the terms, all op amps seem to have their own unique character, but I find the OPA2209 to be, quite simply, more even and smooth sounding.  In practically every position (with two notable exceptions) I have placed a 2209 in place of a 4580, the chip has been exceedingly well behaved, showing no oscillations when viewed on my scope.  Of course, circuits with heavy gain requirements will start to reveal the slew limitations of the 2209...in those cases I wiill use an OPA1612.  You are SO right about most manufacturers using old chips in their designs.  Do they think no advances have been made in semiconductor chips 30-40+ years?  Bless you, TI, for always pushing the wafer.

    Be safe, be well, be happy.