I was powering from USB. Now that you mention it I should try power/battery, too. I don't have the DT880s right now but I certainly will try that with my HD600s. When listening on my Macbook Pro, iTunes volume is set to about 90%, power is from USB, gain is high, the comfortable volume for my HD600's is around 12 o'clock. I haven't actually tried max volume with the HD600s, only the DT880s which got close to begin with.
Try replacing the opamps to see if the problem persists. The other day I noticed the right channel being slightly louder than the left. I looked at the opamp and I realized one of the pins on a SOIC chip I soldered wasn't quite done right and I had to redo it.
Also, I don't know if you're basing your experience on listening to music, but remember that a lot of music recordings lean to the right slightly. That is, instruments/vocals/effects are more often than not on the right, with percussion/bass on the left, and this can be kind of deceiving! When I first started getting into headphone amps, I always thought the right channel was louder for music.
I was powering from USB. Now that you mention it I should try power/battery, too. I don't have the DT880s right now but I certainly will try that with my HD600s. When listening on my Macbook Pro, iTunes volume is set to about 90%, power is from USB, gain is high, the comfortable volume for my HD600's is around 12 o'clock. I haven't actually tried max volume with the HD600s, only the DT880s which got close to begin with.
Ah ok, I'd thought that your conflicting experience to mine with driving 600Ohm cans might have been due to the limited 5V of the USB port.
I had no issues while running off the higher 12.6V from the wall-wart/battery, and didn't want potential New D6 owners to have a
wrong impression of the D6's capabilities.
It's a brilliant amp, @the end of it's volume travel it just stops getting louder... instead of distorting.
My D6 gets pretty hot after a couple of hours on battery, more so with 4 AD797's but still with other opamp combos. I don't remember it happening when I got the D6 originally. I'll try to investigate further and see which component is responsible but I was wondering if anyone else noticed.
Its the Li-Pol battery pack that is heating up I didn't notice it until this morning when I was listening on battery for a couple hours and touched the D6 and it was warmish but not hot. These batteries have blown up in laptops.But I doubt that our little D6's haha are going to blow up. More info
Hey sfmatt:
My D6 gets warm during operation too, intrigued... I checked last night and the AD797 in Buffers were a little Hot,
while the 797 in L/R were Warm to touch. Nothing concerning, just a wee suprised.. lots of Buff traffic I guess?
4 eh? yours must look like mine does now.... such precise seperation and placement of instuments/voices/sounds
along with the depth and width of the "soundstaging"... All from a portable D6... Sick!
The only way to use the AD797 as a buffer is to use stacked single to dual adapters. The D6 is designed to use dual-channel buffers while the 797 is a single-channel opamp. Using 6 of them, (2 in L/R + 4 for buffers) will significantly reduce the battery play time, as they draw a lot of current, approximately 9 ma each. This totals over 50 ma just for quiescent current, with more current being drawn during operation. This will also result in considerably more heat during operation than with other opamp combinations.
The only way to use the AD797 as a buffer is to use stacked single to dual adapters. The D6 is designed to use dual-channel buffers while the 797 is a single-channel opamp. Using 6 of them, (2 in L/R + 4 for buffers) will significantly reduce the battery play time, as they draw a lot of current, approximately 9 ma each. This totals over 50 ma just for quiescent current, with more current being drawn during operation. This will also result in considerably more heat during operation than with other opamp combinations.
For Sennheisers, I highly recommend having 2 x THS4032 as buffers with 2 x LME49710 in L/R. These chips really synergize beautifully, and the LMEs don't suck too much juice.
For Sennheisers, I highly recommend having 2 x THS4032 as buffers with 2 x LME49710 in L/R. These chips really synergize beautifully, and the LMEs don't suck too much juice.
The AD797 does give the D6 more Warmth I just rolled the 797's in the Opamp position with the stock buffers and it sounds much warmer I would suggest you also get the Topkit and listen for yourself. IFI had my way I would have a switch on the top that allowed me to switch between the 797's and The Topkit for different music types.
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