Mal Valve
HighEndHifi
D. Mallach
Towersgarten 11
45239 Essen
Germany

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




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Head amp three Mk 4

balanced head amp in full tube technique 
for electrostatic  +  magnetostatic  +  dynamic  headphones

 
Preamp3L-vorne
 


Design * Construction

· operation of electrostatic, magnetostatic  and dynamic  headphones
. full tube technique in the signal path
· completely balanced signal processing in all operation modes
· balancing of unbalanced input signals
· input transformer for balancing and galvanic isolation
· parallel push-pull design
· class A-operaton in all stages
· output transformers for impedance balancing
· input and output transformers from own manufacturing
· modular catridge technique
· volume control by processor-controlled relays and fixed resistors (1%)
· volume control with high resolution
· all switching processes relay-operated
· switch mode power supply for all supply voltages
· on-off muting
. individual adaptation to the efficiency of the headphones
· remote control(option)
. balanced preamp output (option)

Front - keyboard

· display
· input 1+2
· input 3+4
· volume
· mode
· on



for operating mode
line 1+2 balanced
line 3+4 unbalanced
127 x 0,7 dB steps
4 Ohm + 16 Ohm + ESH + preamp output (option)
on-off + store





 

 
Preamp3L-innen
 




Features

· 2 x ECC 81 tubes
· 4 x EF 184 tubes
· 4 x 6V6 power tubes
· 2 x input transformers with Mu-metal-shielding
· 2 x output transformers
· display for input, mode and volume
· internal switch mode power supply 150 VA
· power cable 2m
· remote control (option)

Specifications

· balanced in          
· unbalanced in          
· inpute impedance
· input sensivity        
· outputs                        

· power outputs             
· output impedance  
· output impedance pre out (option)
· high outputs                

· high voltage
· Stax Pro Bias
. total harmonic distortion (THD)
. frequency response
. signal-to-noise ratio               
· supply voltage
· power consumption
· standby                



2 x line
2 x line
100 kOhm
1 V
2 x XLR 4pole Stereo balanced
2 x 6,3 mm headphone jack stereo or 2 x 3pole XLR (pre out)
2 x 12 Watt 4 / 16 Ohm
4 - 16 - >600 Ohm
< 1 Ohm
2 x special sockets for Stax-Pro headphones
2 x high voltage sockets for other electrostatic headphones (option)
800 Vpp
580 VDC
0,05 %
10 - 50.000 Hz
92 dB (A)
90 - 250 VAC, 50 - 60 Hz
100 Watt
0,3 Watt

Headamp3-hinten

Connectors

· 4 x gold plated cinch sockets
· 4 x gold plated 3pole XLR sockets
· 2 x gold plated jack sockets
· 2 x gold plated 4pole XLR headphone sockets
· 2 x special sockets for electrostatic headphones (Stax)
· 2 x high voltage sockets for other electrostatic headphones (option)
· AC power socket


Storage operation

· input select
· mode select
· individual volume adjustment for 4 Ohm, 16 Ohm, ESH and preamp output (option)
· display brightness control (remote control)


Options

· balanced preamp outputs with 2 x 3pole XLR - 2 x jack sockets not applied
· High-voltage outputs for additional electrostatic headphones
· MalValve-metal remote control
· front plate / chassis natural anodized

Housing

· 10 mm aluminum front plate brushed and black anodized
· alumninum chassis brushed and black anodized
· engraved front plate labeling

· dimensions: 
· weight:

483 mm (W) x 100 mm (H) x 310 mm (D)
11 Kg

 

Remote control (option)

· input select
· volume adjustment
· mute
· display brightness control
· 20 mm massive aluminum chassis
· engraved labeling
· brushed surface
· black or natural anodized
· dimensions:                                   
· weight:                                             












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

Remote

 

Front plate / chassis natural anodized

 

 

 

 

 

 

 

 

 

 

Upgrade MK 4

· new driver stage
· at the front side adjustable gain to compensate different efficiencies of the headphones
· mechanical decoupling of the volume module
· balance control
· brightness control of the display
· new software
· new output impedances
· new output transformers