iBasso D2-Viper (Pictures, Impressions, and Reviews): Read the Rules! - Page 9

Approximately 15 hours according to iBasso.

Asr, thanks a lot for that info. You are wonderful, but you already know that.

Anyone have this problem:

Sometimes, when the D2 is charging, the red LED in the back blinks, and every time it blinks, there is an audible "click" noise with my FreQs.

I don't think it's audible with headphones. I think the battery charging goes in stages: solid red, blinking red, then green.

Does your charging red light blink (it has a subtle blink, so you have to look directly at it)?

Also, I tried feeding 24bit 96khz FLACs through the USB, and it works fine. Did someone say it isn't supposed to work?

Everything over 16/48 is just gets discarded, you might be loosing some SQ this way. Launch asiocaps or asio4all it'll show max cap of the device.

I have ran the Viper at 11'00 position for about a day using battery only, it lasts 15 hours. So basically iBasso isnt wrong about it.

I put in AD8599 (IC2) and ADA4841 (IC7 - main opamp). They are pretty low power opamps, so I hope I'll get longer battery. I feel like I need the battery to last as long as possible since they don't warranty the battery, heh.

I haven't really experimented, but I do like the stock opamps. I tried the LT1469 for about 5 minutes but felt it was muddier than the 1364.

I don't think I've lost much from the stock to ADA4841 switch (I don't feel like it's any worse), but I'm not listening analytically. I think it's a good idea to use a low noise opamp with IEMs. With the 4841, I can barely hear any hiss with my sensitive FreQs. Also, the low and high gain seem to have the same amount of hiss when I made the switch. Now, I am always using high gain because it sounds better for some reason (like more authoritative?).

My Opamp supply is as follows:

LT1057
LT1364
LT1469
LT6241
LT6234
LMH6643
AD8397
AD8599
AD8656
AD4841
LM4562
OPA2111KP

well, i dont see anyone "avg" running more than 15 hours =D

let say u wake up at 730, go to work by 830, u have... till 1130 night time to listen to music on the viper. if its less / more from rolling the opamp, i dont think it'll affect it TOO much.