what is max cable length for dac to amp
USB DAC Recommendations and Q well-nigh cable length
- Thread starter boead
- First engagement
My dilemma is that my PC is about 25 feet from the stereo. I can either run a long RCA cables (which I already made with Belden wire that sound ok) OR I take to run long digital connections. Either Optical or Coaxial RCA.
I'm not even sure is you lot can get or make a 25-30 foot coaxial cable or optical TOSLINK.
Is there an inherent limit to how long a digital wire can exist? I hateful a point which degraded audio quality becomes pregnant?
I found that the longest a USB cable is sold is about sixteen feet. Why? Can a USB cable for an audio device be longer then 16 feet?
Is it best to utilize an external DAC for a Computer close to the computer and use a long RCA to the preamp
OR
Is it best to use a long digital cable from the computer to the DAC at the rack with short IC'due south to the preamp?
options:
i. utilise the digital out from a usb audio carte (like M-Sound transit),
2. Utilise long, expensive RCA out from dac, so microdac>long RCA
3. long firewire to dac
4. wireless, like squeezebox, airport express and use either a brusk digital or short RCA.
i similar 4 the best..
Quote:
Originally Posted past granodemostasa
options:
one. utilize the digital out from a usb audio card (like Thou-Audio transit),
ii. Use long, expensive RCA out from dac, then microdac>long RCA
3. long firewire to dac
four. wireless, like squeezebox, airport express and utilise either a short digital or brusque RCA.
i similar 4 the best..
Will the SqueezeBox act like a Windows sound device? I desire it for more than then just music.
I've heard some negative comments about USB DAC's being less musical (or Audiophile quality) and so they should be when compared to like DAC that apply coaxial.
Any truth to that?
Any opinion on the Scott Nixon DAC+USB or the original DAC+
depends. USB dacs catechumen the signal to spdif before they transport it to the dac, and then they should sound the same regardless of the signal.. it's just a bad dac. problems relating to usb could be that information technology is often times unstable and has issues with not so powerful computers.
the scott nixon dacs, on the other hand, are not like that, they catechumen directly from usb to the dac and are said to be more jitter resistant than conventional dacs.
This place will make you any length toslink you want. I accept 2 of them and wouldn't mind another.
sysconcept.ca
Also, Blue Jeans Cables can brand you a Digital Coax cablevision to any length, in the instance you want to have your DAC closer to your amp.
As well, information technology looks similar a 25 foot analog RCA cable from them would cost $l, using the Belden 1505F conductor.
Quote:
Originally Posted by Thaddy
As well, Bluish Jeans Cables can make you a Digital Coax cable to any length, in the case you want to take your DAC closer to your amp.
Besides, it looks similar a 25 human foot analog RCA cable from them would toll $fifty, using the Belden 1505F usher.
How do you think long optical or coaxial length will bear upon quality?
I'one thousand not sure, simply using some logic, I tend to encounter longer runs of analog cables available when compared to digital cable. Sort of how most Toslink cables are < 12 feet in length. And then, taking that into consideration, I'd imagine information technology would be meliorate to have the DAC closer to your reckoner and run some long RCA cables to the amp/receiver.
edit: As for quality, I have no clue. Wouldn't be hard to test though, given you have multiple inputs on your amp.
Since signals sent via optical cables aren't affected by interference and don't degrade (jitter issues from poor optical converters aside) I'd recommend that you grabbed a toslink cablevision of a suitable length. Yous can go 25 ft toslink cable for less than $25 shipped here.
(I only clicked 1 of the first links after googling "toslink 25 ft")
As I sympathize it USB, Firewire, AES/EBU(?) transfer digital data much like a hard bulldoze, in packets or groups and this digital betoken needs to be converted into SPDIF then it tin be clocked and feed into a DAC.
This leads me to believe that it something like jitter every bit a component that degrades information is a non issue and that in all reality, the data fro the computer to the device that converts to SPDIF is irreverent to Audiophile integrity. I presume this is why devices like a squeezebox can transfer data via RJ45 or wireless and still be HiFi!
Doesn't sending a digital SPDIF signal through a LONG wire dethrone audio where something like jitter is a issue? Practice you not think its pregnant enough?
Since USB needs to acquit some voltage to communicate with the hardware chips that are talking to each other, long runs can be problematic. Someone told me they employ a xviii foot USB with a Scott Nixon TubeDAC+ with NO apparent problems.
It leads me to believe information technology would be meliorate to deliver a USB indicate to an all-in-one device (like a USB DAC) then it would exist to send out a 75ohm signal over lets say 25 or l feet of wire to a traditional DAC.
Am I on the right runway?
I have an Apogee Mini-Dac west. USB. The USB cablevision I employ with no problems is really made of two pieces, i most fourteen feet long and the other nearly 5 feet long. I compared information technology with the shorter (~ 2-three feet), thicker and improve looking cablevision that came with the Apogee and plant the Apogee cable to sound slightly amend (more precise, more dynamic, with better detail). I don't know why: is it because of the supposedly better shielding or what?
Apogee recommends a maximum USB cable length of xv feet and advices against using an USB hub, only the reason they invoke is related to the stability of the connexion and not to the sound quality.
Quote:
Originally Posted by Don Quichotte
I have an Apogee Mini-Dac w. USB. The USB cable I employ with no problems is really made of two pieces, one well-nigh 14 feet long and the other about 5 anxiety long. I compared information technology with the shorter (~ two-three feet), thicker and better looking cable that came with the Apogee and institute the Apogee cable to audio slightly better (more precise, more dynamic, with improve detail). I don't know why: is it because of the supposedly better shielding or what?
Apogee recommends a maximum USB cable length of fifteen feet and advices against using an USB hub, merely the reason they invoke is related to the stability of the connection and not to the sound quality.
I ordered this USB Agile Extension in a 16 foot length. http://www.usbcable.com/cat24.htm
I also ordered a 15 human foot USB cable AND a x human foot extension (non-buffered).
I'll try these configurations.
PC > 15' USB cable > 16' active extension > USB DAC > three' RCA (MIT S3) > Preamp
PC > 15' USB cablevision > 10' extension > USB DAC > 3' RCA (MIT S3) > Preamp
PC > xv' USB cable > USB DAC > 12' RCA (MIT S3) > Preamp
PC > 2' USB cable > USB DAC > 35' RCA (DIY Belden wire) > Preamp
And we'll see how it sounds with my M-Audio USB DAC. If information technology'south ok I'd similar to attempt the Scott Nixon USB DAC+ or another USB DAC like the one from Red Wine Sound.
Great! Postal service your findings!
Quote:
Originally Posted by boead
If it's ok I'd similar to attempt the Scott Nixon USB DAC+ or some other USB DAC like the one from Red Wine Sound.
OK by me!
http://world wide web.redwineaudio.com/USB_Select.html
This unit WITHOUT an analog output stage is $399 which means all this is for the purpose of converting the USB to SPDIF.
He eliminates the USB ability, converts to 12V so information technology can work on battery which is mounted inside.
( he says… this removes the noisy USB port's ability supply out of the equation (which is derived from the computer'due south switch-mode power supply), as well as the length of USB cable that information technology would take to travel betwixt the figurer and DAC…)
He also supervene upon the SPDIF output resistor with Caddock MK-132 precision metal film resistor, direct wiring of the SPDIF output signal to a loftier-bandwidth 75-ohm BNC digital output jack which I'm non thrilled with! And he adds dampening material to the crystal oscillator which sets the clock for SPDIF, this is from Thousand-Audio.
Lastly he increases the ability supply rail capacitance with the use of Blackness Gate capacitor, and replaces the USB CODEC chip'south critical voltage line decoupling capacitors with Black Gate NX-Hi-Q caps
All this so far just for USB to SPDIF conversion, obviously the near of import thing.
If you desire an analog output likewise, he adds this for $100; He completely bypasses of the opamp in the stock analog output stage. The L and R output signals are at present straight from the internal DAC'south output phase and sent to the RCA output jacks via Black Gate NX-Hi-Q coupling caps.
So the only other thing he'due south using from the M-Audio lath is the Audiophile 2496 converter.
He also includes a battery charger that plugs into the back. The charger has a 'charged' indicator light. Batteries are replicable and said to last half dozen to viii hours.
For an extra $50 he has a slightly larger enclosure and batters with longer life span upward to 24 hours.
Not a bad parcel for $499 and many seem to like it.
Something to consider with the Scott Nixon. With the upgraded ability supply its $575 and so yous need a power cord! That's another $125 to $200 easy! So realistically the SN is $700++ and what most a nice NOS tube, that's another $50.
they sell cables upwardly to 975 feet.
Time to befriend with your neighbor.
zimmermanyoult1971.blogspot.com
Source: https://www.head-fi.org/threads/usb-dac-recommendations-and-q-about-cable-length.170790/
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