Mal Valve
HighEndHifi
D. Mallach
Towersgarten 11
45239 Essen
Germany

Tel +49-(0)201-408084
Email: info@malvalve.de


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Preamp Four Line Mk 7

completely balanced preamp

 
Preamp4L-vorne
 

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

 

 
Preamp4L-innen
 


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)



Preamp4L-Stimmung
 


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

 
Preamp4L-hinten

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

Remote