Congrats on the new tube amp. I replaced the stock fans with two Noctua NF-R8 80mm Fans. The original URL from Amazon now points to dog collars, but I found these: https://www.amazon.com/Noctua-Bearing-Cooling-NF-R8-redux-1200/dp/B00KF7T9MI/ plus the splitter wire required...

No, it's not dead. The activity comes and goes. I personally only have the Mk VI+ and so don't have any personal recommendations for tube rolling on the Mk VIII. Earlier, I posted a list of favorites, based on personal research, for tube rolling on the Mk VI+...

Congratulations on obtaining and enjoying the LD MK VI+. As a long-time owner and fan of the Little Dot tube amp line, I'm sure you'll have years of making beautiful music together. In general, upgrading driver tubes makes more of a Sonic difference than upgrading power tubes. Having said that...

The only official Little Dot reference I'm aware of is: http://www.littledot.net/forum/viewtopic.php?f=9&t=831 I recall someone had a reverse-engineered schematic at one point. Maybe in the Little Dot Super-Mods thread...

You're very welcome. The Shuguang CV181-Z drivers need adapters, but the more expensive CV181-TII drivers have a smaller base and do not need adapters. Checking out their website, I guess the CV181-Zs aren't available anymore. [UPDATE: Google says they're available elsewhere.] I kinda like...

Happy New Year, and welcome to the LD MK VI+ Fan Club! Without a doubt, the Little Dot MK VI+/VIII headphone amps punch well above their weight class. Occasionally, I start my eye wandering for something better (read: more expensive), but I'm usually surfing while listening to my MK VI+...

You're very welcome. In addition to the amazing link SonicTrance shared above, here's my original post on my collected favorites for tube rolling so far: https://www.head-fi.org/threads/little-dot-mk-vi-little-dot-mk-viii-se-owners-unite.522099/page-150#post_12203881 - Dave

Hi Sage. I can't help you with a mods list (other than recommended tube rolling), but the official Mk VI+ page is: http://www.littledot.net/forum/viewtopic.php?f=9&t=831 and includes a (Dropbox) link to the manual...

Thanks for the confirmation, Jason. I just bought a 256GB microSD card and formatted it as exFAT. So far, so good, but if I run into strange problems, I'll reformat it as FAT32 using http://www.ridgecrop.demon.co.uk/index.htm?guiformat.htm . - Dave ps. FWIW, Android OS has supported exFAT...

Very imprecisely, two indicators of tube failure (other than total blowout) are: Noticeable increase in distortion or decrease in gain in one channel* Noticeable decrease in the meters, which show the working positive (+ve) plate current for one of each pair of power tubes *There are many...

Hi Mattias. The Tung Sol 6SL7GT fit without an adapter, but the fatter base on the Shuguang Treasure CV181-Z driver tubes require an adapter such as: http://www.ebay.com/itm/1pc-Octal-Gold-plated-tube-saver-adapter-for-EL34-GZ34-KT88-6V6-6L6-5Z3P-6SN7GT-/191109289479 Note that the higher end...

Hi wkndWarrior. A ways back in this thread, I made a list of prospective driver and power tubes for my Mk VI+ here: https://www.head-fi.org/f/threads/l...se-owners-unite.522099/page-150#post-12203881 Personally, I've tried Tung Sol 6SL7GT Cryo Treated driver tubes before selecting the CV181-Z...

What Jester said. The Grace Design m920 — or all Grace DAC/amps for that matter — is a world class, commercial build quality DAC and headphone amp with the added benefit of also being a fully balanced preamp. The USB, AES3, S/PDIF, and TOSLINK (optical) inputs give you an incredible range of...

You are correct. According to http://www.littledot.net/forum/viewtopic.php?f=9&t=871 "The Little Dot MK VIII SE is designed to be used with high impedance headphones like Sennheisers (HD600, HD650, HD800) and Beyerdynamics." On the other hand, the Little Dot MK VI+ is a high current beast...

Hey Milez. I'm the proud owner of both a Little Dot Mk. III and Mk. VI+, so I would imagine the Mk. VIII would fall somewhere in between. As with any tube amplifier, the actual tubes get hot to the touch (last time I measured, they were about 140°F). However, the smaller tubes of the Mk. III...