MalStat Four

electrostatic +  magnetostatic  loudspeaker

Features

- planar drivers in midrange and high frequency ranges
- excellent pulse processing
. high efficiency
- high sound pressure capability
- no dynamic compressions on high volume levels
- uncritical power amplifier load

Sound

- authentic reproduction of voices and acoustic instruments
- speaker detached reproduction
- natural mapping of size
- complementary tone color
- chassis for bass, midrange and treble with the same sound characteristics
- "fast", substantial Bass
- high dynamics in all ranges
- best dynamics even in low volume levels

Construction

- three way system
- planar drivers for midrange/ high frequencies (magnetostatic/electrostatic)
- coaxial dipole-midrange-high frequency chassis
- dynamic bass woofer
- passive or active operation
- recommended amplifier power > 20 Watt

magnetostatic woofer

- bass driver in closed damped box
- planar membrane
- push-pull operation
- impregnated and dual carbon fiber reinforced foamed sandwich membrane
- meandering membrane voice coil
- parallel membrane vibrations without partial effects
- voice coil in homogeneous magnetic field
- neodymium magnets for maximum field strengths
- damped low resonanting plate for magnets

Magnetostatic midrange speaker

- dipole speaker
- coaxial construction (surrounding the tweeter)
- neodymium magnets for maximum field strengths
- planar voice coil
- single ended operation for best acoustic transparency
- low reflective membrane aramid fiber reinforced
- damped low resonanting plate for magnets
- acoustically highly transparent touch protection for membrane

Electrostatic tweeter

- dipole speaker
- coaxial construction (surrounded by the midrange speaker)
- push-pull operation
- special dielectric
- efficiency optimised perforated electrodes
- low-resonance internally damped multi-layer construction
- doped dielectric conductivity of the membrane
- no age-related reduction of conductivity
- Mylar-diaphragm 5 mcm
- touch protected chassis

Passive crossover network (external)

- power transformer to adjust the levels for bass, mid- and highrange frequencies
- variable crossover frequencies for bass and midrange frequencies
- flexible adaptation of electrostatic tweeters to the power amplifier
- good adaptation to room acoustics
- adaptation to the amplifiers output impedances by transformer inputs 8 to 1 Ohms
- filter characteristics and slew rate for best pulse performance
- air-core coils with low internal resistance
- polypropylene-capacitors
- step-up transformers for signal voltage of electrostatic tweeters
- high voltage power supply for polarisation voltage of the electrostatic membrane
- rotary potentiometer for fine adjustment of the polarisation voltage
- operation indicator for polarisation voltage

speaker chassis

- woofer
- midrange speaker
- tweeter

Ø 405 mm
515 x 275 mm
373 x 120 mm

Connections

- 4 mm banana jacks for crossover
- 4 mm banana jacks for woofer
- 4 mm banana jacks for midrange speaker
- 4 mm banana jacks for tweeter
- 4 mm sockets to level bass, mid- and high range frequencies
- 4 mm sockets for crossover frequencies of bass and mid range frequencies
- 4 mm sockets to adjust the electrostatic tweeter
- high voltage connectors for the electrostatic speaker
- AC power socket

Accessories

- crossover with power transformer and high voltage power supply
- high voltage cables for electrostatic tweeters
- cables to adjust the crossover
- power cable

Specifications

· impedance
· loading capacity
· frequency range
· crossover frequencies
· efficiency
· recommended amp power
· power supply
· polarisation voltage

2 - 8 Ohm depending on the setting
> 500 watts
20 Hz - 30 kHz
250 Hz / 5000 Hz
96 dB SPL (2,83 V/1m)
> 20 watts
90 - 250 VAC, 50 - 60 Hz
up to 5 kV (adjustable)

Housing

- black matte finish or different colors
- dimensions:
- woofer
- mid-/high range
- crossover
· weight:  
· woofer
· midrange / tweeter
· crossover

750 mm (H) x 450 mm (W) x 500 mm (D)
590 mm (H) x 350 mm (W) x 150 mm (D)
280 mm (D) x 290 mm (H)

ca. 2 x 70 kg
ca. 2 x 20 kg
ca. 2 x 30 kg