In stock

Opamp: OPA275
Tube: RCA Clear top 12AU7
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:6lb (include packing)
Acessory: 12AU7 tube, DY-1 power supply, compatible from 110v to 240v
Hand built

Shipping cost in US: 20usd USPS priority mail with tracking

30 days refund. One year free repairing.

REVIEW: Head-Direct EF1 Desktop Tube Hybrid Amp

Review @ techPowerUp.com

Comments from Customers 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

In stock

Opamp: OPA275
Tube: RCA Clear top 12AU7
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:6lb (include packing)
Acessory: 12AU7 tube, DY-1 power supply, compatible from 110v to 240v
Hand built

Shipping cost in US: 20usd USPS priority mail with tracking

30 days refund. One year free repairing.