While I am not an official "Loaner Program" reviewer, I would like to post my experience with the TTVJ Portable Millet Hybrid (PMH) amplifier here.
I like this amp. That is all.
Nah... I have more, but I do like the amp, enough that I bought it tonight
I went out of town and picked it up from Luminette on Friday, and listened to it a bit with my Livewires and SE530 with custom tips. I didn't think to bring full size cans with me on my trip. The gain is too high to really enjoy the amp with these 119db/mw kinda IEM, and you have to play it louder than normal to get above the channel imbalance in the volume control. Just above the point of channel imbalance (8:30 o'clock) the sound is great with Livewires, and the mids and highs are sweet, with tight bass. I would never listen to it turned higher than that with these IEM.
With the volume all the way down, there wasn't so much of a hiss as there was a rushing sound (like water, or like listening to a seashell at the beach). It was still not rushing very loud and didn't get loud enough to ever hear over the music. After I got home Sunday, with the RS-1 I cannot hear this rush or hiss, and with RS-1 there is minimal hiss if I pause my iMod and turn the volume all all the way up. Even the hiss in the quiet time between songs with the iMod playing is not bad when the volume is cranked up. Still, I have to find a manual and see if there is a low gain setting hidden inside at all. Switching to Altec Lansing IM716 with podectomy and resistors as low as 22 and as high as 102 ohm, there was no noise.
Most of my listening was Sunday and Monday with RS-1 and D2000, after I returned from Denver. The TTVJ is very musical, and brings life to my APS re-cabled Grado RS-1 as well as any of my desktop amps can. I really appreciate the little bit of bass boost it gives the RS-1, but the bass is bordering on heavy with my APS cabled Denon D2000. It definitely has a lot of power, and can propel the RS-1 to earsplitting levels if I wanted.
It does a beautiful job with acoustic music, and brings life to Saxophone and Piano, Violins, Trumpets, and everything else. Saxophones are both warm and reedy at the same time. It passes my Diana Krall test with several tracks from Girl in the Other Room. The Piano in Tsuyoshi Yamamoto's "Autumn in Seattle" is never piercing on forte hits of the keys (like my stock ibasso D2 did). Cymbals have an appropriate sheen to them, and String Bass is well controlled. It is very dynamic and detailed, with good ambience and sound stage.
I did most of my listening with the iMod and Amp rubber banded together and sitting it on my desk. I could make the tubes ring if I flicked the TTVJ PMH with the back of my finger and fingernail, but carrying it around did not cause problems, and there is no heat coming off the amp like my modified STAX SRM-001. My BIGGEST complaint is the volume knob turns too easily, and it is almost impossible to NOT have the volume change when it is placed in a coat pocket with the iMod playing tunes.
I briefly (no long A/B) compared it to my Predator and Pico, with iMod as source (using both my portable v-cap dock and a jumbo cryo silver x LOD) and it plays right up there with the best of them. The D2000 were better with the Predator and Pico, and Grado RS-1 were magical with the TTVJ, probably more the fault of the D2000 than the TTVJ as they do like to make bass. The iMod+TTVJ even has more bass than my 300 hour maxed Woo 6 via Apogee mini-DAC, but at the cost of a little less detail and clarity (the Woo has the $10 Sovtek rectifier tube while I burn in the v-caps and BlackGates and I do feel it is bass shy with the RS-1, go figure).
I was not expecting to like this amp, and was thinking of not even listening to it, as it was originally just going to be collateral on a loan of some other equipment. I have to say this is one enjoyable little amp, that will be used often when I am using my RS-1 instead of IEMs with my iMod. I haven't had a chance to try it with other Grados, HD600/650 or Edition 9 yet, so please don't ask. I assume based on how it did with the other headphones, it should be great with those as well. But, with the RS-1 I found a sweet spot and am not feeling the urge to move on right now.
Hope this helps!