[Nankai]

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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

30 days refund. One year free repairing.


EF5 Thread @ headphone amp forum

Pictures made by George (head-fi ID Hydrocity)

 

[electropop]

Very nice.

So I take it that the accessories (power supply and the tube) are included in the package. I sort of answered my own question there..

 

[plonter]

is the power supply unit sold seperately? can we use it with the EF1? would it be a worthy improvement to the existing EF1 wall wart?