Hi, I am looking at trying to improve the performance of the y1, y2 and Teralink X2 and one thing I keep coming back to is the noisy USB. I've been looking at this device : ADUM4160 | Full/Low Speed USB Digital Isolator | Digital Isolators | Interface | Analog Devices and a module...

Hi, There's so many posts about this card I feel sure I've missed something. Please let me know if there's a modification I've missed. Here's a list of the mods I've done so far: replace the oscillator with a low ps/ppm tcxo replace the ceramic caps in the feedback circuit for the I/V...

Hi, I just thought I'd start a thread to see if anyone else has built one of these and what they think of it. I've seen amps like the Keces use these chips and that sells for something like US$450. I got the pcb on Ebay for US$9 and got some sample chips from National to see how it...

Hi, I've got some op amps etc I don't need and I'm hoping to swap them. I'm looking for : PCM2706/7 OPA2365 I have (all new, still in the anti-static tube) : AD8397 OPA690 AD8656 SRC4192 I'm in Hong Kong - the post here is v quick and 100% reliable. cheers

Hi, My Sennheiser PX200 died the other day and now I'm looking to either replace them or, if I can, upgrade to something better. So I wonder what my options are ? I've only seen AKG do similar things - K450 look tasty. Does anybody have them ? How about the K480NC ? There's also the...

Hi, oops, typo, I mean NPN. Here's the circuit. I needed a 12-15v tone control so that's why I chose this. What's the best npn buffer transistor ? Would I need to change the input bias resistor from 1k for the upgrade transistor ? Thanks ! I'm using MKP1837 Vishay caps in the...

Hi, Does anyone know anything about this new device ? I'm trying to find out more about it but I've hit a brickwall. I'm specifically interested in how it bypasses the windows mixer because it doesn't use a special driver. However, it can support 96/24. I can't see the point if the...

Hi, I'd like to hear from anyone who has one of these sound cards ! Please let me know what headphones you're using, and what ATX or other power supply you're using, and what you think of the sound quality ! I have HD650s (silver baffle) and I've been using an ATX or an alternative smps...

Hi, Anybody using a 12v gel battery to power their amp ? For HD650s ? I've recently discovered how good amps can sound using a gel battery so now I'm wondering if there are any 12v amps out there that can drive HD650s. I'm quite happy to build it myself if needs be. As I already have the 12v...