This is a drop-in opamp upgrade for the Music Hall CD-25, Shanling SD-100 or Onix XCD-88 CD players that requires no soldering. Just pop out your stock socket mounted opamps and plug these in.
I have three sets available. These opamps upgrade the stock Burr Brown opa604's (2604's) operational amplifiers in the above mentioned CD players with the much more expensive and much better performing opa627 opamps. To give you an idea if you go to [url]www.digikey.com,[/url] the stock opa604's cost about $4.00 apiece and your CD player utilizes two, one for each channel. These opa627's (OPA627AU) cost over $18.00 apiece and your CD player will utilize four of them, 2 for each channel. The opamps are mounted onto a BrownDog adapter PCB, 2 opamps per adapter, and plug right into your existing opamp sockets. You will need two of these 'modules' for the upgrade. You can expect to hear tighter bass, better soundstage and imaging and much greater clarity and detail. I have tested these in my CD player and each set has been burned in for at least 8 hrs. The upgrade shops like Parts Connexion, Underwood HiFi, Sound Odyssey charge between $59.95 - $74.00 [B][I]per module[/I][/B] meaning it would cost you between $120 - $148 to do the upgrade and that's if you install them yourself. If you have them install them you'd have to add an additional $50 or so. I have purchased the components in bulk at a very low price and assembled them myself. I have experience as an Electronics Technician and I have done alot of soldering. I used a high quality lead-free, silver content solder. These are tested and guaranteed to work perfectly. I just did it for fun and would be willing to sell these at a fraction of the retail cost. I will provide instructions and pictures to show you how to install. In fact, if you don't feel comfortable doing it yourself I'll install them for free. Just pay for shipping both ways. It is extremely easy however.
I'll sell them for $45 [B][I]per pair[/I][/B] shipped. That's $22.50 apiece :eek: for you mathematically challenged.
Here is a pic of the installed modules.