Hi I received my Pulse (vanilla version) about 1 month ago and I opened a ticket with LHLabs because the device seems so buggy that it almost is a paperweight for me. I am posting what I am experiencing here in case anyone else has had the same issues. I did try to search this thread and LHLabs forum but it was hard to find any combination of what I found. Forgive me if it sounds confusing but here is what I put in the ticket:
I have tried Toslink to Ak120, SPDIF1 to DX50 and X5, USB to a Windows 7 laptop and line out to various portable amps. I also have used an HD650, Alpha Prime, SE846 and other iems and headphones of varying sensitivity and ohms. I have a the following:
- vanilla Geek Pulse - looks like the first chassis based on photos
- Firmware is Main 2.0, MCU 2.4
- on windows 7 LH control Panel I see Geek Pulse 1V4
- I don't have LPS but I have the 1G USB cable
The output for each combination seems sporadic. Sometimes I hear sound and sometimes I don't. The issue seems worse whenever I switch gain, input or volume. If I change input from toslink to USB or spdif one of the others doesn't work when I switch back. Sometimes they work if I power off the device sometimes not. The gain sometimes works but there isn't always a change. The volume only seems to work if i make the change then switch the device off and on but then sometimes the sound is gone when I do that. In other words, in order for any combination of volume/gain/input to work consistently, i have to play with changing them turning on and off and when one combination works 'NEVER POWER OFF THE DEVICE OR MAKE ANY CHANGES' otherwise at least one of the three (gain/volume/input) doesn't have any effect. I like the sound but it is sometimes either too loud or too low (which I cannot change or something will go wrong) or the input doesn't work at all. The device at this point is so buggy that I feel like I have a paperweight instead of a good dac/amp.