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HEAD-DIRECT EF1 Hybrid Headphone Amp  

post #1 of 19
8/3/08 at 11:09pm
Thread Starter 
Buy here (110v version)

Buy here (220v version)


Opamp: OPA275
Tube: 12AU7 (SINO)
Frequency Response: 20-30K Hz
THD+N: less than 0.2%
S/N: more than 95dB
Input impedance: 50K Ohm
Output impedance: 2–2K Ohm headphones
Output signal strength: up to 15 Volts at 32 Ohm
Input: RCA*1
Output: 1/4 headphone jack*1
Dimension: 110mm(W)*50mm(H)*270mm(D), or 4.33inch(W)*1.97inch (H)*10.63inch (D)
Weight: 750g (without power supply)
Acessory: RCA Cleartop 12AU7 tube, 18V AC power supply
Hand built in Shanghai, China

Price: 399 usd
Shipping cost in US: 20usd USPS priority mail with tracking
To worldwide: 50usd TNT express mail with tracking



Discussion Thread

http://www.head-fi.org/forums/f5/hea...ct-ef1-374903/

Review by Frederik S

http://www.techpowerup.com/reviews/Head-Direct/EF1/

Review by skylab

http://www.head-fi.org/forums/f5/rev...ne-amp-361841/

Comments from Customers

Comments from headphoneaddict

http://www.head-fi.org/forums/f5/hea...ef-1-a-354843/

Feedback from North Jersey Meet 7/26/2008

http://www.head-fi.org/forums/4526629-post9.html

http://www.head-fi.org/forums/4529337-post34.html

http://www.head-fi.org/forums/4538671-post54.html

http://www.head-fi.org/forums/4542685-post59.html






head-direct: The Web Store of HiFiMAN
post #2 of 19
8/11/08 at 12:52pm
Woah... tell us more!
post #3 of 19
8/11/08 at 2:47pm
i listened to this at Canjam....great little amp....must have more details on price.
post #4 of 19
8/11/08 at 6:27pm
Hey hey! Very interesting. If the price is right, I may just get this to drop back into the dynamic world.
post #5 of 19
8/11/08 at 8:51pm
I listened to a prototype at CanJam08 and I felt it was a very nice sounding amp. Lots of detail, clarity, and musicality. If the production unit has been improved futher it will make for a very nice amp, specially if priced right.

Good luck on your new amp!
post #6 of 19
8/11/08 at 9:39pm
Such a cool amp, sounded great at the NJ meet.
post #7 of 19
8/11/08 at 11:35pm
Thats just awesome, its free through google checkout. In for one.
post #8 of 19
8/12/08 at 11:51am
Looks like a nice little amplifier.
post #9 of 19
8/13/08 at 5:57pm
Price?
post #10 of 19
8/14/08 at 5:40am
Quote:
Originally Posted by manaox2 View Post
Thats just awesome, its free through google checkout. In for one.
Quote:
Originally Posted by jellojoe View Post
Price?
haha, wait for it...
post #11 of 19
8/17/08 at 11:08am
Just wondering what difference does the number of tubes make to an amp, I have seen one with three tubes.
post #12 of 19
8/17/08 at 12:38pm
Just wanted to say that this amp sounds great with grados
post #13 of 19
8/19/08 at 7:15pm
Fang always has good products for good prices.

Good luck with your sales, dude!
post #14 of 19
9/3/08 at 12:19am
wait?
post #15 of 19
9/3/08 at 8:21am
What's the producer for the tube that comes with the amp?
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