MalValve - Preamp Four Line

Preamp Four Line Mk 7 completely balanced preamp

Design * Construction . full tube technique in signal path · completely balanced signal processing in all modes · balancing of unbalanced input signals · galvanic isolation by input and output transformer coupling · display to show the choosen adjustment of front panel switches or remote control · cartridge module technique · volume control by processor controlled relays and resistors · volume adjustment with high resoultion and wide control range · all switching processes relay-controlled (no capacitive cable influences) · flexible switching functions by processor control · external switch mode power supply for all supply voltages · on / off muting

Features * Accessories · 4 x EF184-tubes · 16 x ECC88-tubes · 12 x circuitry catridge modules · 2 x input transformer with MU-metal-shielding · 2 x output transformer with MU-metal-shielding · display · external switch mode power supply 200 VA · remote control · control wire preamp four line <> power supply four (2 m) · power cable (2 m)

Front panel rotary step switches

· input	balanced phono, CD, DVD - unbalanced DVD, CD, phono, tuner, tape
· out	balanced out 1, 2, 1+2, out off,unbalanced out 1, 2, 1+2
· mode	stereo, stereo reverse, mono, mono left/right, left channel, right channel, phase 0 ° - 180 °
· bass	bass off, bass - 6/12 dB, 14-43 Hz
· balance	16 x 0,7 dB-stepwise
· volume	120 x 0,7 dB-stepwise
· on	on/off, adjustment store

Display

· display to show selected operations and adjustments

Specifiactions

· balanced input
· unbalanced input
· input impedance
· input sensivity
· balanced output
· unbalanced output
· output impedance
.·output voltage
· total harmonic distortion (THD)
· frequency response
· signal-to-noise ratio
· power supply
· power consumption
· Standby

Phono-(preamp), CD, DVD (SACD)
DVD, CD, Phono, Tuner, Tape
470 kOhm
1 V
2 x Preamp Out
2 x Preamp Out, Tape out
< 100 Ohm
20 V (RMS)
0,005 %
10 - 90.000 Hz
106 dB (A)
90 - 250 VAC, 50 - 60 Hz
110 Watt
0,3 Watt

Connectors

· gold plated cinch sockets
· gold plated XLR-sockets
· special connector for control wire

Housing

· 20 mm aluminum front plate brushed and black or natural anodized
· 10 mm aluminum chassis brushed and black or natural anodized
· massive aluminum transformer chassis brushed and black or natural anodized
· brass rotary knobs high-glass polished and chromed

· dimensions:
· weight:

483 mm (W) x 395 mm (D) x 90/140 mm (H)
18 Kg

Netzteil

Power supply

· front-sided operation display
· back-sided AC power socket
· back-sided special connector for control wire
· 15 mm massive aluminum front plate brushed and balck or natural anodized
· massive aluminum chassis brushed and balck or natural anodized

· dimensions:
· weight:

263 mm (W) x 315 mm (D) x 100 mm (H)
5 Kg

Remote control

· channel < > for input selection
· volume - / + for volume adjustment
· mute
· 20 mm massive aluminum chassis
· engraved labeling
· brushed surface
· black or natural anodized
· dimensions:
· weight:

67 mm (W) x 196 mm (D) x 20 mm (H)
0,5 kg

Preamp Four Line Mk 7

completely balanced preamp