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  #1 (permalink)  
Old 08-04-2008, 02:09 AM
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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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  #2 (permalink)  
Old 08-11-2008, 03:52 PM
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Woah... tell us more!
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Old 08-11-2008, 05:47 PM
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i listened to this at Canjam....great little amp....must have more details on price.
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Old 08-11-2008, 09:27 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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Old 08-11-2008, 11:51 PM
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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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Old 08-12-2008, 12:39 AM
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Such a cool amp, sounded great at the NJ meet.
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Quote:
Originally Posted by ericj View Post
And keep in mind that some headphones are hard to tame the 'colorations' out of... Taming it requires buying esoteric materials and using tools such as a screwdriver and scissors.
NJ MEET IC
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Old 08-12-2008, 02:35 AM
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Thats just awesome, its free through google checkout. In for one.
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Old 08-12-2008, 02:51 PM
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Looks like a nice little amplifier.
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Old 08-13-2008, 08:57 PM
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Price?
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Old 08-14-2008, 08:40 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, 02:08 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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Old 08-17-2008, 03:38 PM
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Just wanted to say that this amp sounds great with grados
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Old 08-19-2008, 10:15 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, 03:19 AM
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wait?
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  #15 (permalink)  
Old 09-03-2008, 11:21 AM
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What's the producer for the tube that comes with the amp?
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