* 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

* Tight, deep bass, precise, transparent, spatial and 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 two channel-separated double triodes ECC83, extremely linear class A
  current mirror driver stages (built with hand-selected high-frequency transistors) and 10 or 12
  hand-selected to very high quiescent current adjusted power mosfets determine lowest distortion level and an

  excellent harmonic spectrum

* Channel-separated power supplies for the solid state sections, fast recovery diodes,

  a gigantic total power supply capacity of more than 88 000 Microfarads,

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

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

  * the solid state section,

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

* An intelligent security circuit controls loudspeaker outputs with 2 paralleled
  relais for each channel with gold plated contacts

* Switchable damping factor characteristic for perfect loudspeaker matching

* Switchable input resistance

* Gold plated cinch input jacks and 63 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

Specifications:


Gain: 17,9 times / +25,0 dB (level difference left/right at 1 kHz: <0,08 dB)

Input sensitivity: 1805 mVeff for full output into 4 Ohms, 2110 mVeff for full output into 8 Ohms 

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

Damping factor at 1 kHz: switchable: 470 / 250 (measured with 8,00 Ohm resistor at 10 Watts)

Output power (sinus) at 1kHz: 260 Watts (32,3 Veff) into 4 Ohms each channel,

                                                 180 Watts (37,8 Veff) into 8 Ohms each channel

                                                 (THD+N = 0,2 %, with nominal mains voltage)

                                     
Diagram: Frequency response at 10 Watts into 4 Ohms: 2,6 Hz - 90 kHz -3 dB

                (one channel shown in diagram)

Risetime/falltime: 3,85 µsec into 4 Ohms load (square wave 20 kHz, 12 Vss, measured from 10 % to 90 %)

Max. DC Output offset: +/- 22 mV

Crosstalk: 86 dB (input 365 mVeff, opposite channel with 40 Ohms loaded, (at 1 kHz, left/right, right/left)

                 test setup grounded, output load 4 Ohms each channel)

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

Total harmonic distortion (THD+N): into 4 Ohms: 0,008 %, into 8 Ohms: 0,008 %

                                                        (measured at 1 kHz and 10 Watts, test setup grounded,
                                                         measuring bandwidth 22 Hz - 22 kHz)

Quiescent current: left: 276 +/- 3 mA, right: 262 +/- 3 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 (1 kHz) 

Security circuit disconnects loudspeakers:

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

* at too high levels of very low frequencies or at DC offset at an output
* at too high levels of very high frequencies or oscillating at an output 

After end of a break-down both outputs will work again. 
 

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

Weight: 20,5 kg