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#1449365 - 02/17/16 07:35 PM USB Tube headphone amplifiers
Slabraton Offline
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Registered: 12/16/12
Posts: 16034
Loc: California
In my search for a tube preamp, I came across a couple with USB outputs! I am curious if anybody here has any experience with these? Here's the most interesting one.

HIFIMAN EF2A USB Headphone Amplifier

Both USB & Analog Inputs The EF-2A sports both a stereo analog input and a USB B-type input. Switchable from the faceplate. The analog input is very good in its own right offering astonishing transparency for such an inexpensive product. The USB input allows the EF-2A to make use of its Burr Brown PCM2702 D/A converter and offers far greater sonic performance from your computer than using the headphone output.

The DAC in the EF-2A supports up to CD quality resolution (16Bit/44kHz) via USB.

An affordable alternative in a tube-driven headphone amplifier, the EF2A is a hybrid design, USB headphone amplifier using 6J1 tubes for its input stage and incorporates a Burr-Brown PCM2702 DAC Chip. The EF2A provides USB input and features 16 bit 44.1 kHz performance.

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#1449482 - 02/18/16 02:08 PM Re: USB Tube headphone amplifiers [Re: Slabraton]
Slabraton Offline
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Registered: 12/16/12
Posts: 16034
Loc: California
"The EF2A provides USB input and features 16 bit 44.1 kHz performance."

This is the problem. 16 bits isn't going to be of any use.

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#1449487 - 02/18/16 02:32 PM Re: USB Tube headphone amplifiers [Re: Slabraton]
uptildawn Offline
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Registered: 12/15/01
Posts: 8517
Loc: Iowa
I don't understand why a tube headphone amp is desired....
Don't you want less noise floor in a headphone amp?
Just asking..... no particular opinion.
_________________________
uptildawn

2013 Iowa City JazzFest sets!
Dr Lonnie Smith Trio w/Jonathan Kreisberg on guitar
Pharoah Sanders Quartet
Fred Hersch Trio
These are post mixes set to single camera video (by Rich Rauch).

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#1449803 - 02/19/16 05:19 PM Re: USB Tube headphone amplifiers [Re: uptildawn]
Slabraton Offline
Planeteer


Registered: 12/16/12
Posts: 16034
Loc: California
Actually, I was looking for a tube preamp. One that was USB would be great. But it's limited to 16 bits which is a deal breaker.
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