* in our special tube-hybrid technology we combine the precision,
power and speed of transistors with the smoothness, clarity and
richness in tonal colour of tubes

* Powerful, deep bass, precise, transparent, spatial and very dynamic reproduction of music, 
  exact timing with live-character

* High current capability and damping factor, especially for low-efficient loudspeakers 
  with critical or low impedance

* High stability driving capacitive loudspeaker loads

* The input voltage amplification with a double triode ECC83, an extremely linear class A current mirror
  driver stage (built with hand-selected high-frequency transistors) and 10 hand-selected to very high

  quiescent current adjusted power mosfets determine lowest distortion level and an

  excellent harmonic spectrum

* Separated power supplies for input/driver stage and power mosfets, fast recovery diodes, 
  a gigantic total power supply capacity of more than 92 000 Microfarads,

  stabilized power supplies for anode-voltage, heater-voltage and the soft-start section

* Shielded, plastic moulded 900VA torroid transformer with separated coils for

  * the mosfet section,

  * the driver stage, 

  * the anode-section,
  * the heater-section
  * soft-start section

* An intelligent security circuit controls loudspeaker output with 5 paralleled
  relais with gold plated contacts

* Scanning of the heat-sink-temperature, if a too high temperature is detected, the loudspeaker is disconnected

* Switchable damping factor characteristic for perfect loudspeaker matching

* Switchable input resistance

* Switchable power supply bypass-capacitors directly at the power mosfets

* Switchable onset-frequency of the boucherot-element for perfect loudspeaker matching

* Gold plated cinch input jack and 100 Amperes binding posts 

* Input wired with high-end-cable HMS 

* Noble, high glossy black acryl front, massive, solid high-end-casing with resonance 
  absorbing polished chrome feet 

* Every device comes along with "its own" original measuring record of the frequency response, 
  further measuring records are available on request

(Preliminary) Specifications:


Gain: 17,9 times / +25,0 dB (level difference of a power amp pair at 1 kHz: <0,08 dB)

Input sensitivity: 2320 mVeff for full output into 4 Ohms, 2540 mVeff for full output into 8 Ohms

Input resistance: switchable: 28 kOhms / 56 kOhms, input DC-coupled

Damping factor at 1 kHz: switchable: 800 / 470 (measured with 8,00 Ohm resistor at 10 Watts) 

Output power (sinus) at 1kHz: 430 Watts (41,5 Veff) into 4 Ohms, 260 Watts (45,5 Veff) into 8 Ohms
                                                 (THD+N = 0,2 %, with nominal mains voltage)

                                     
Diagram: Frequency response at 10 Watts into 4 Ohms: DC - 104 kHz -3 dB

Risetime/falltime: 3,35 µsec into 4 Ohms load (square wave 20 kHz, 12 Vss, measured from 10 % to 90 %)

Max. DC Output offset: +/- 22 mV

Signal to noise ratio: -96,5 dB (A-weighted, ref. to 6,325 Veff, input with 40 Ohms loaded, test setup grounded) 

Total harmonic distortion (THD+N): into 4 Ohms: 0,0039 %, into 8 Ohms: 0,0055%
                                                        (measured at 1 kHz and 10 Watts, test setup grounded,
                                                         measuring bandwidth 22 Hz - 22 kHz)
                                                         Please do take into consideration: The value of THD+N depends on
                                                         the used tubes

Quiescent current: 524 +/- 5 mA  (after a warm-up time of 90 min, at nominal mains voltage minus 3 V AC)

                                     
Diagram: Harmonic spectrum at 10 Watts into 4 Ohms (at 1 kHz) 

Security circuit disconnects loudspeaker:

* when device is switched on for a delayed switch-on of the output
* if an internal fuse blasts
* at break-down of an internal supply voltage
* at an interruption of mains voltage
* at too high temperature

* at too high level of very low frequencies or at DC offset at the output
* at too high level of very high frequencies or oscillating at the output 

After end of a break-down the output will work again. 

Dimensions: W 435mm x H 145mm x D 395mm (inclusive rear heat sink) 

Weight: 22,0  kg