But if the master clock is in the Hiface, I don't see how wireless USB would add jitter, please explain. And correct me if I'm wrong but I haven't seen an optic isolator that can transmit 480Mbs. Also I know there was a lot of experiementation with optic isolators on DAC ground plans to isolate the digital from analog section a few years ago, results were poor.
Will a hi-speed device (Hiface) work through a full-speed device (Adum)? Edit: I just saw that you were referring to a wireless USB - hmmm! Try it & see & let us know the results 🙂
BTW, the problem with the sharp edge sound to I2S was not the ground!
BTW, the problem with the sharp edge sound to I2S was not the ground!
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Hi Regal
You are likely right about the jitter. If you only need 16/44 there will be no need to transmit 480Mb/s in any case. As of how well the M2Tech driver will like a hub is anyone's guess.
You are likely right about the jitter. If you only need 16/44 there will be no need to transmit 480Mb/s in any case. As of how well the M2Tech driver will like a hub is anyone's guess.
no digital cable for HiFace
Hi All, I'm ordering a HiFace today, started thinking about cables. Has anyone tried using a male RCA to male RCA adapter (connecting the HiFace direct into the back of the DAC)? My PC is about 6ft away from the audio equipment, so I thought about using a 6ft USB, and go straight in with the SPDIF. The "best cable is no cable" theory. -Mike
Hi All, I'm ordering a HiFace today, started thinking about cables. Has anyone tried using a male RCA to male RCA adapter (connecting the HiFace direct into the back of the DAC)? My PC is about 6ft away from the audio equipment, so I thought about using a 6ft USB, and go straight in with the SPDIF. The "best cable is no cable" theory. -Mike
Hi John,
what are PH shunt regulators?
Did you already compare them to batteries?
I got the new version TeddyRegs. Did you have a chance
to test those also?
Greets,
Klaus
I have modified USB extension cables to be able to input 5V power at the Hiface end. I've used various 5V supplies, 5V wallwart, 4*1.2V battery pack & they confer a sonic improvement on the Hiface (not as much as my 3.3V mods 🙂)
See here: http://sites.google.com/site/hifacemods/home
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I haven't had a chance to compare the Paul Hynes shunt regs to the batteries yet.
I'd like to hear the Teddy regs - what's the difference between the old & new versions?
I've heard that the PFM Flea reg sounds great - have you heard it?
I didn't read up on the difference of the two versions.
I designed my own bords of the old version two
years ago and they made a siginficant difference.
The new versions are still layinng around here untuched.
This time I just purchased the boards as they are cheap.
I like TeddyRegs for their simpleness and easy to obtain
componets.
I never heard of the PFM Fea regs.
So many options so little time.
Greets,
Klaus
I've just had a report back from someone who bought a battery from me to test it against highly regarded commercially available & freely available regs & the battery is noticeably better.
He's running these regs on the AVCC of a Sabre DAC (we all know these are sensitive to PS quality). They are operated form a heavily filtered supply which is fed from a 1KVA isolation transformer - so a serious PS.
He said the change to battery was clearly better & noticeable within seconds but also became more obvious with extended listening.
He's running these regs on the AVCC of a Sabre DAC (we all know these are sensitive to PS quality). They are operated form a heavily filtered supply which is fed from a 1KVA isolation transformer - so a serious PS.
He said the change to battery was clearly better & noticeable within seconds but also became more obvious with extended listening.
Latest review of my modified Hiface Review: Jkeny’s modified Hiface - Head-Fi: Covering Headphones, Earphones and Portable Audio
Abstract
Abstract
I now have a version of the modified Hiface for feeding I2S to Buffalo or AckoDAC digital inputs see here: DAC Options (Hiface USB Transport Modifications & Ancillaries)
You only show one battery but you're supplying two separate 3.3V references. Am I missing something?
Really really good...Bravo!
I got mine two weeks ago. It should be stated again how good this little thing "sounds", even in stock form. Compared to a classic squeezebox that i used as a transport only, the difference is quite stunning...
I know i will want to mod it at some stage, but for now, i'm just enjoying my Flac's over and over again on an old mac mini G4 , 1.42 GHz. Works perfectly. Dac is a modded Zhaolu 2.5 with zapfilter.
I got mine two weeks ago. It should be stated again how good this little thing "sounds", even in stock form. Compared to a classic squeezebox that i used as a transport only, the difference is quite stunning...
I know i will want to mod it at some stage, but for now, i'm just enjoying my Flac's over and over again on an old mac mini G4 , 1.42 GHz. Works perfectly. Dac is a modded Zhaolu 2.5 with zapfilter.
I think the only difference from the original hiface photos is that small 22.5792 clock is no longer a MEC clock.
You are talking about removing the SPDIF transformer in the HiFACE - is the LL1517 being used for this in the Buffalo?
Pharod, Can't be done without breaking the case - it's glued along a seam all the way around the case.
I rebox my modified Hiface inside a bigger box with batteries, switch, led, charger socket.
Attachments
Thanks Jkenny. Nice Job!
Any tips on setting up the battery charge? I called one of the charger companies you recommended because I want to try them in another application (battery filament) and they said the charger has to see each one of the batteries. Then he told me something crazy - parallel the batteries then put then in series. That made no sense.
Can you share your charging schematic?
Any tips on setting up the battery charge? I called one of the charger companies you recommended because I want to try them in another application (battery filament) and they said the charger has to see each one of the batteries. Then he told me something crazy - parallel the batteries then put then in series. That made no sense.
Can you share your charging schematic?
I think he's talking about balanced charging where each batteries' charge has to be sensed by the charger so as not to overcharge any particular battery. I charge my two batteries in parallel - no schematic.
Are you going in there to DIY the mod?
Not sure if I'm going to diy my mod just yet. I wanted to play with other things in the system with those batteries and when I get it settled I thought the battery mod on the HiFace would be more telling.
My friend will probably get the whole thing from you. Actually maybe two friends who don't know or trust their solder skills.
Since both my other applications would call for two batteries in series per application - filament 2 packs of two. Dac three packs of two. Just putting a charger on them with them paralleled? I guess my brain isn't working this morning. I just put in a switch to take them out of the circuit and place them in parallel?
My friend will probably get the whole thing from you. Actually maybe two friends who don't know or trust their solder skills.
Since both my other applications would call for two batteries in series per application - filament 2 packs of two. Dac three packs of two. Just putting a charger on them with them paralleled? I guess my brain isn't working this morning. I just put in a switch to take them out of the circuit and place them in parallel?
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