My portable rig includes a DX90 and a SR71A. Now I want to bypass the internal dac/amp section of the iPhone by connecting it to the DX90 through lightning. The DX90 can be used as a USB dac for PC/laptop but it requires a driver installed on the PC/laptop.  I know there are many dacs that can...

I' ve just received a new SR-71A this afternoon. I plugged my DX90 into it to drive my HD600 and realized that the sound is narrow and compressed. The HD600 (more than 120 hours burn-in) drived by only the DX90 (more than 400 hours burn-in) produces a very detail, airy sound with sweet treble...

I' ve just received a new SR-71A this afternoon. I plugged my DX90 into it to drive my HD600 and realized that the sound is narrow and compressed. The HD600 (more than 120 hours burn-in) drived by only the DX90 (more than 400 hours burn-in) produces a very detail, airy sound with sweet treble...

I have a DX90 and my new SR-71A (to drive my HD600) will arrive in a few days. Thus, I am searching a suitable shot 3.5mm cable to connect the DX90 to the SR-71A. I' ve heard that different materials can make sound change a little bit. However, I am not sure if this idea (or even myth) is true...

I've recently bought the DX90 and HD600. The amp on the DX90 is good but it somehow is not powerful enough to drive the HD600. I have to use gain High and volume up to 250 but still feel the bass is not so defined as it was when I listened to it in the store with an amp.   I have two question...