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  #1 (permalink)  
Old 08-04-2008, 03:09 AM
Premier Sponsor
Head-Direct
 
Join Date: Oct 2006
Posts: 576
Default HEAD-DIRECT EF1 Hybrid Headphone Amp

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

Head-Direct EF1

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

Head-Direct EF-1

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






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Last edited by Nankai; 10-24-2008 at 03:11 AM.
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  #2 (permalink)  
Old 08-11-2008, 04:52 PM
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Woah... tell us more!
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  #3 (permalink)  
Old 08-11-2008, 06:47 PM
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i listened to this at Canjam....great little amp....must have more details on price.
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  #4 (permalink)  
Old 08-11-2008, 10:27 PM
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Hey hey! Very interesting. If the price is right, I may just get this to drop back into the dynamic world.
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  #5 (permalink)  
Old 08-12-2008, 12:51 AM
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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!
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  #6 (permalink)  
Old 08-12-2008, 01:39 AM
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Such a cool amp, sounded great at the NJ meet.
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feedback : : inventory
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  #7 (permalink)  
Old 08-12-2008, 03:35 AM
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Thats just awesome, its free through google checkout. In for one.
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  #8 (permalink)  
Old 08-12-2008, 03:51 PM
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Looks like a nice little amplifier.
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  #9 (permalink)  
Old 08-13-2008, 09:57 PM
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Price?
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  #10 (permalink)  
Old 08-14-2008, 09:40 AM
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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...
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  #11 (permalink)  
Old 08-17-2008, 03:08 PM
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Just wondering what difference does the number of tubes make to an amp, I have seen one with three tubes.
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  #12 (permalink)  
Old 08-17-2008, 04:38 PM
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Just wanted to say that this amp sounds great with grados
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  #13 (permalink)  
Old 08-19-2008, 11:15 PM
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Fang always has good products for good prices.

Good luck with your sales, dude!
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  #14 (permalink)  
Old 09-03-2008, 04:19 AM
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wait?
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  #15 (permalink)  
Old 09-03-2008, 12:21 PM
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What's the producer for the tube that comes with the amp?
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