sennsay
1000+ Head-Fier
I answered using the PM you sent For other folks, no, the Jitterbug has not squashed any dynamic range and in fact the R2R has been performing brilliantly, no weird noises, no squeals, no hiss, no hum, no 5V isolation ..... just great music! Since this R2R will be used as the hub for our lounge music and TV system - mostly, plus quite a few late night listening session, no doubt - I'm not going to fuss with what is already a terrific piece of kit. I haven't switched it off since it arrived three days ago, so I've been able to regularly check in on it and hear how the run-in process has altered the sound in waves, some subtle, others bring more of a feeling that the same tracks sound fantastic one hour and later in the day a little darker and less dramatic. This is often normal with some types of electronics and much less so with others. I know that the Schiit Yggdrasil needed a good month before really settling into it's easy stride. king-wa still tells me up to 500 hours for the R2R to be at it's very best. I'm working on it already around the 68 1/2 hour mark. I remember running in an a-gd Earth HDAM in a headphone amp I built and it went through some amazing changes, the biggest at the 50 hour mark when it seemed as if a subwoofer had kicked in and it's stayed like that ever since. The 50 hour mark seems to be a common shift point for a lot of gear to 'relax' as it were, headphones included, my original HD650 did exactly that. Maybe I just have an ear for such subtleties, as do many others.Thanks for the detailed review, but in my case with "jitterbug" as it seemed to me makes the sound more clenched, the impression was created that "jitterbug" ate a dynamic range and added some kind of flatness, all the magic of the sound was lost. At that time, I did not yet know about the isolation of 5 volts and used "jitterbug" + audioquest carbon 0.75 cable. What kimber cable do you use for USB(maybe you compared it with audioquest carbon)? Does it make sense to try another power cable, how do think?
I use r2r-11 at office where a lot of EMI and power network with a lot of switching power supply(impulse) from laptops, monitors etc, and i hear some kind of interference in the form of quiet crunches / wheezing on very quiet moments in music, looks like this mood come from power grid, maybe power cable can help me, some people says that power cords works like some kind of filters... I tried apc power filter, it actually killed the sound... I like the sound of device so much, especially with carbon cable with 5v isolation, but i don't no what to do with this very quite crunches
Sincerly, Andrew
Yes I know, there are many folks out there who absolutely rubbish burn-in/run-in, and they're welcome to their opinion, it is most certainly NOT my experience over 40 years in this 'hobby', so I don't make my own opinions the reference point for the rest of the planet either
We have one of those insidiously nasty so-called 'smart' power meters that the blasted power company snuck in one day when we were out - not so smart meters! The amount of hash, hums and buzzes that it puts through the power system is criminal - I would dearly love to take a hammer to the damn thing - BUT it is not affecting the R2R in any way that seems deleterious to it's health or my ears .... so far.