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GRAAF iti WFB TWO valve Preamplifier, with 3-gain mm/mc phono, and mains isolated power supply.

Brierley Hill, West Midlands £1,050.00
Posted
32 days ago

Description

The GRAAFiti WFB TWO is a high-quality, line and phono preamplifier, extremely versatile thanks to its circuitry with total absence of feedback.
It has seven inputs (five lines, one phono, one tape monitor) and three stereo outputs (one tape rec, two line outputs).
Listening to sound from digital sources has been made more musical and less artificial by using two double triodes 6922 in the line gain section.
Phono inputs are made using solid state technology using BJT and MOSFET capable of producing a high gain needed to amplify low output signal moving coils.
To assure that all cartridges are compatible with the WFB Two, there are three different mm/mc gain levels with impedances of 100, 500, 47kohms.

Specifications:
Gain.......................Line 16 dB
Line + phono........ MM 40 dB
Line + phono........ MM / MC 55 dB
Line + phono........ MC 62 dB
Input Impedance....Line 100 Kohms
Phono 100, 500, 47kohm.
Output impedance.220 ohms
Max. out volt..........60v. rms
THD.......................0.4% to 10V
Signal/noise ratio...line 103db to max. output
Phono mm 90dB
Phono mm/mc 78db
Phono mc 74db
FR..........................4 Hz to 80 KHz (-3 dB)
EQ-RIAA................+/- 0.4 dB from 20Hz to 20KHz
Supply voltage.......105,120, 210, 240v. (50-60 Hz)
Absorption..............30w.
Dimensions ...........410x105x300mm.
Weight................... 5 Kg
The particular WFB Two power supply disconnects it from the mains and allows it to work at +/- 10% oscillating voltages with respect to its nominal value.
The components of the GRAAFiti line are assembled manually with the same care and precision as Graaf products have long been distinguished.
Supplied with new valves (2 x Reflector 6n23-eb), among the best 6922 types on the market with better balance of tone. Some minor marks, nothing too scary!
The Phono stage, as expected from Graaf, is particularly good - easily drives my Denon (0.2v output) with ease and no noise.
Traditional valve sound. The soundstage is wide, deep and detailed more so since replacing the Sovtek valves supplied; sound is beautifully integrated, surrounding the listener - first to hear will buy!

Ad ID: 1295430357

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