Review: cMoy Headphone Amp Bass BOOST Edition - Page 6

Would these adequately power a pair of HD-580's? I have a pair of SR-60's right now, but will likely be adding a pair of HD-580's in the near future. I want something that will power both well from my Zen Vision M.

My amps work well with HD-580's.

Unless I am too busy, I will resume sales some time next week. Also, I may begin to sell bare PCBs in the coming weeks.

Do they sound well with SR-60's too? If so, I will be in for one when they are ready.

IMO, the bass boast works even better with Grados. The HD580 and HD600 go low enough and don't need more bass.

I would be very interested in a kit.

I would also be interested in buying a kit.

"sbulack" will be evaluating one of the two v1.55 amps early next week. If he agrees that the jack spacing is adequate, I will order final boards and make kits available around the week of Oct. 22-26.

While v1.55 undergoes evaluation, I have one v1.50 prototype for sale.


(v1.50 in back, v1.55G in front)

Are these available yet? If not when will they be? And where can I pick one up from?

Is it possible to get one of these with a 1/4" jack?

It's possible if you bypass the automatic-on feature, but since wiring a 1/4" jack separately from the PCB will add minor inductance to the circuit, the theoretical benefit of avoiding a 1/4" to 1/8" adapter is likely defeated. So, I recommend sticking with the 1/8" jack and using an adapter.

I should have the new PCBs available in 2 weeks and will continue sales on eBay.

Mea Culpa on amp Burn-In

Hi!
In this thread I posted a snide comment doubting the usefullness and validity of amp burn-in.

Well I want to make my Mea Culpa (a formal acknowledgment of personal fault or error) on this matter.

I have a Go Vibe 7 amp only since a few weeks and the thing sounds different now than during the first hours of use. I used it maybe 40-50 hours and it sounds alot better now! At first it was only loud. Now the sound is more clear and I hear alot of subtilities that were not present before.

This under the same condition: Using the amp connected to the line out of a Cowon X5, with the volume knob of the amp at about 11 o'clock and listening to the same type of music through the same IEM and headphones.

I do not want to steer this thread on the Go Vibe 7 but to state what I observed: The fact of the matter is that burn-in takes some time, even with an amp!

Now I just received a Qables SilverCab Cowon iAudio X5 LOD and very curious of changes occuring...in time...

regards,

ROTFLOL!!

Really, laughing. I knew this would happen, it's all good

Well, the concept is easy to understand. At some point the digital signal gets converted into an analog signal, and since electronic devices themselves are physical objects, the electrons and silicons within the electronic device will gradually affiliate themselves with a certain pattern.

I have an idea that may give us a graphical view of the effect of burn in, but I don't have any burned in amps this week. I'll post some graphs after I've burned in some of the new amps.

The second Volume Pot prototype (with more space between jacks and pot) has reached its SQ zenith at around 60 hours of use, this time with a higher quality IC - which now fits between the input jack and volume pot. Everything I've ever posted about the SQ of the cMoyBB is as true as ever, only better now than before through the use of better quality IC's. I must repeat that the cMoyBB, with the clean transparency, spacious openness and elegant simplicity of its sound, fills a needed and enjoyable niche as a listening instrument in the collection of home and portable amps I already use.