De Graaf WFB Two is een veelzijdige voorversterker van topwaliteit. Hij maakt nergens gebruik van feedback-schakelingen.

Fexibele phono-ingang. Geschikt voor MM- en MC-elementen

Verkeert in uitstekende staat. Er zit een minimale beschadiging op een knop (zie foto 6). Verder in nieuwstaat.

Originele verpakking is aanwezig. Staat aangesloten en is te beluisteren in Amsterdam-West.

Hij laat zich niet graag fotograferen. Foto's 3 en 4 zijn van het web geplukt.

The GRAAF 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 coil (MC) cartridges.

To assure that all cartridges are compatible with WFB TWO, you can select three different moving magnet (MM) or moving coil (MC) gain levels with impedances of 100, 500, 47000 ohms. Copper shielded. 

A very musical sounding hi-end preamp at a very reasonable price. 

Manually assembled. As all other GRAAF products this is already a classic.

Excellent condition and flawless operation. Original box. 

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 - 47000 ohms
Output impedance............220 ohms 
Maximum output voltage......60 V RMS 
Harmonic distortion (THD)...0.4% to 10V
Signal / noise ratio........line 103 dB to maximum output 
Phono MM 90 dB  Phono MM / MC 78 dB  Phono MC 74 dB Frequency response..........4 Hz to 80 KHz (-3 dB)  EQ-RIAA.....................+/- 0.4 dB from 20Hz to 20KHz 
Supply voltage..............105 ÷ 120/210 ÷ 240 V  (50 ÷ 60 Hz)
Absorption..................30 W 
Dimensions (L x W x H)......410 x 105 x 300 mm  Weight......................4.6 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.