Rated Output Power

HIGH  IMPEDANCE SETTING

minimum continuous sine-wave power, 
from 20Hz-20KHz with no more than:

0.3% THD (FTC) @ rated line voltage
0.3% THD (FTC) @ rated line voltage
0.5% THD (FTC) @ rated line voltage
1% THD (FTC) @ rated line voltage

 

 

110 Watts into 8 Ohms (Class A operation). 
220 Watts into 4 Ohms (55 Watts Class A operation). 
400 Watts into 2 Ohms (27.55 Watts Class A operation). 
600 Watts into 1 Ohm (13.75 Watts Class A operation).

LOW  IMPEDANCE SETTING

              minimum continuous sine-wave power, 
              from 20Hz-20KHz with no more than:

              0.3% THD (FTC) @ rated line voltage
              0.5% THD (FTC) @ rated line voltage
              1% THD (FTC) @ rated line voltage

 

 

110 Watts into 4 Ohms (Class A operation). 
220 Watts into 2 Ohms (55 Watts Class A operation).
400 Watts into 1 Ohm (27.55 Watts Class A operation).

Rated Output Voltage

HIGH  IMPEDANCE SETTING

with continuous sine waves, from 20Hz-20KHz @ rated line voltage:

• 42 Volts peak into 8 Ohms, corresponding to 220 Watts peak.

• 42 Volts peak into 4 Ohms, corresponding to 440 Watts peak.

• 40 Volts peak into 2 Ohms, corresponding to 800 Watts peak.

• 34.64 Volts peak into 1 Ohm, corresponding to 1,200 Watts peak.

LOW  IMPEDANCE SETTING

with continuous sine waves, from 20Hz-20KHz @ rated line voltage:

• 29.66 Volts peak into 4 Ohms, corresponding to 220 Watts peak.

• 29.66 Volts peak into 2 Ohms, corresponding to 440 Watts peak.

• 28.28 Volts peak into 1 Ohm, corresponding to 800 Watts peak.

Rated Output Current

HIGH  IMPEDANCE SETTING

with continuous sine waves, from 20Hz-20KHz @ rated line voltage:

• 5.24 Amps peak into 8 Ohms, corresponding to 220 Watts peak.

• 10.48 Amps peak into 4 Ohms, corresponding to 440 Watts peak.

• 20 Amps peak into 2 Ohms, corresponding to 800 Watts peak.

• 42.43 Amps peak into 1 Ohm, corresponding to 1,200 Watts peak.

LOW  IMPEDANCE SETTING

with continuous sine waves, from 20Hz-20KHz @ rated line voltage:

• 7.42 Amps peak into 4 Ohms, corresponding to 220 Watts peak.

• 14.84 Amps peak into 2 Ohms, corresponding to 440 Watts peak.

• 28.28 Amps peak into 1 Ohm, corresponding to 800 Watts peak.

Maximum (clipping) Output Power

HIGH  IMPEDANCE SETTING

continuous 1 KHz sine-wave power,
with no more than:

 1% THD (FTC) @ rated line voltage
 1% THD (FTC) @ rated line voltage
 1% THD (FTC) @ rated line voltage
 1% THD (FTC) @ rated line voltage

150 Watts into 8 Ohms. 
300 Watts into 4 Ohms. 
500 Watts into 2 Ohms. 
700 Watts into 1 Ohm.

  LOW  IMPEDANCE SETTING

               continuous 1 KHz sine-wave power,
               with no more than:

               1% THD (FTC) @ rated line voltage
               1% THD (FTC) @ rated line voltage
               1% THD (FTC) @ rated line voltage

 

 

150 Watts into 4 Ohms. 
300 Watts into 2 Ohms. 
450 Watts into 1 Ohm. 

Maximum (clipping) Output Voltage

HIGH  IMPEDANCE SETTING

with continuous 1 KHz sine wave, 
@ rated line voltage:

 

• 49 Volts peak into 8 Ohms, corresponding to 300 Watts peak.

• 49 Volts peak into 4 Ohms, corresponding to 600 Watts peak.

• 44.72 Volts peak into 2 Ohms, corresponding to 1,000 Watts peak.

• 37.42 Volts peak into 1 Ohm, corresponding to 1,400 Watts peak.

LOW  IMPEDANCE SETTING

with continuous 1 KHz sine wave, 
@ rated line voltage:

• 34.64 Volts peak into 4 Ohms, corresponding to 300 Watts peak.

• 34.64 Volts peak into 2 Ohms, corresponding to 600 Watts peak.

• 30 Volts peak into 1 Ohm, corresponding to 900 Watts peak.

Maximum (clipping) Output Current

HIGH  IMPEDANCE SETTING

with continuous 1 KHz sine wave, 
@ rated line voltage:

• 6.12 Amps peak into 8 Ohms, corresponding to 300 Watts peak.

• 12.24 Amps peak into 4 Ohms, corresponding to 600 Watts peak.

• 22.36 Amps peak into 2 Ohms, corresponding to 1,000 Watts peak.

• 37.42 Amps peak into 1 Ohm, corresponding to 1,400 Watts peak.

LOW  IMPEDANCE SETTING

with continuous 1 KHz sine wave, 
@ rated line voltage:

• 8.66 Amps peak into 4 Ohms, corresponding to 300 Watts peak.

• 17.32 Amps peak into 2 Ohms, corresponding to 600 Watts peak.

• 30 Amps peak into 1 Ohm, corresponding to 900 Watts peak.

Small Signal Frequency Response

HIGH  IMPEDANCE SETTING

at 1 Watt into 8 Ohms 
@ rated line voltage:

(+0; -3dB) 4 Hz - 155 KHz.

LOW  IMPEDANCE SETTING

at 1 Watt into 4 Ohms
@ rated line voltage:

(+0; -3dB) 4 Hz - 155 KHz.

Frequency Response

HIGH  IMPEDANCE SETTING

at 110 Watt into 8 Ohms
@ rated line voltage:

(+0; -3dB) 4 Hz  - 155 KHz.

LOW  IMPEDANCE SETTING

at 110 Watt into 4 Ohms
@ rated line voltage:

(+0; -3dB) 4 Hz -155 KHz.

Slew Rate

Vout=83.9 Volts peak-to-peak of
square-wave signal into 8  Ohms,
F=10KHz @ rated line voltage:

33.5 Volts per microsecond

Rise Time

Vout=83.9 Volts peak-to-peak of
square-wave signal into 8 Ohms,
F=10KHz @ rated line voltage:

2 microseconds

Noise

Signal/Noise ratio ref. 2.83 Volts RMS into 8 Ohms (1 W):

22 Hz – 22 KHz
A weighted

Signal/Noise ratio ref. 29.7 Volts RMS into 8 Ohms (110 W):

22 Hz – 22 KHz
A weighted

typically  68.5 dB
typically  75.5 dB

 

 
typically  89 dB
typically  96 dB

IM Distortion

HIGH  IMPEDANCE SETTING

(60Hz:7KHz  4:1) SMPTE:

from 0.1-110 Watts into 8 Ohms 
@ rated line voltage

from 0.1-220 Watts into 4 Ohms
@ rated line voltage

from 0.1-400 Watts into 2 Ohms
@ rated line voltage

from 0.1-600 Watts into 1 Ohm
@ rated line voltage               

no more than 0.5%

no more than 0.5%

no more than 1.5%

no more than 1.5%

 LOW  IMPEDANCE SETTING

              (60Hz:7KHz  4:1) SMPTE:

from 0.1-110 Watts into 4 Ohms 
@ rated line voltage

from 0.1-220 Watts into 2 Ohms
@ rated line voltage

from 0.1-400 Watts into 1 Ohm
@ rated line voltage                

no more than 0.5%

no more than 1.5%

no more than 2%

Voltage Gain

Voltage Gain

39 ± 2% or 31.8 ± 0.2dB.

Inputs

Balanced

 

 

Non-inverting

Inverting

3-pin gold-plated XLR connector.

Pin assignment:

pin 1 = signal ground;
pin 2 = non-inverting input (+);
pin 3 = inverting input (-).

brass, gold plated, single-ended RCA connector (connected in parallel with pin 2 of XLR connector).

brass, gold plated, single-ended RCA connector (connected in parallel with pin 3 of XLR connector).

Input Sensitivity

HIGH  IMPEDANCE SETTING

LOW  IMPEDANCE SETTING

0.761 Volts RMS ± 2% for 110 Watts into 8 Ohms.

 0.538 Volts RMS ± 2% for 110 Watts into 4 Ohms.

 0.538 Volts RMS ± 2% for 220 Watts into 2 Ohms.

 0.513 Volts RMS ± 2% for 400 Watts into 1 Ohm.

Input Impedance

41 KOhms shunted by 470pF.

Outputs

Two sets of brass, gold plated binding posts

Output Impedance

at 1 KHz: 

from 20 Hz – 20 KHz:       

typically 0.082 Ohm.

typically 0.082 ^{+0.007/-0.002} Ohm.

Damping Factor

at 1 KHz: 

from 20 Hz – 20 KHz:   

typically 98 re: 8 Ohm.
 
typically 98 ^+2/-8 re: 8 Ohm.

Operating Temperature

Operating Temperature

-4 to +104 degrees Fahrenheit 
(-20 to +40 degrees Celsius) ambient.

Grounding

Grounding

Separated ground and earth.
Floating chassis connected to mains earthing.

Power Supply

nominal line voltage

100-240 Volts, 50/60Hz.

Input voltage range

±10%.

Two power transformers, two filter chokes, eight separate power supplies.

AC voltage intensively filtered by special RFI power line filter.

Power Supply Energy Storage

Power Supply Energy Storage

Approximately 220 joules.

Front Panel Controls

Front Panel Controls

LED control.

Rear Panel Connectors and Controls

Rear Panel Connectors and Controls

POWER SWITCH.
LOAD SWITCH.
AC POWER INLET.
AC MAINS FUSE, along with the corresponding fuse holder.
One input XLR connector, gold-plated.
Two input RCA connectors, gold-plated.
Two sets of gold-plated SPEAKER BINDING POSTS.
Two DC power jacks (central pin 2mm dia.) for connecting remote link cables.
EARTHING (GROUNDING) post, gold-plated.

Features

AC voltage selector

100/120/220/230/240 Volts, internally switchable.

Transformer hum reducer

Special circuit reduces power transformer core saturation and residual mechanical hum.

Ultra low-noise power transformer

Custom-made toroidal power transformer has no mechanical contact with either the transformer cover or the chassis, as transformer is suspended in a special encapsulant that almost completely absorbs even the residual mechanical vibrations.  This plays a significant role in assuring the absolutely unique clarity and micro-resolution during sound reproduction.

Bias setting (load) switch

Switch-selectable biasing circuit maintains pure Class A operation of the output stage for all load conditions between 4-16 Ohms.

Remote control

Power on/off.

Available remote link cable coordinates the remote functions of two or more amplifiers.

Safety/Protection

"Soft-start" circuit protects power supply components from large in-rush currents when the amplifier is turned on.

Protection against possible damages from high voltage transients on AC power line.

Thermal resetting fuse connected in series with AC mains fuse controls heat-sink temperature. 

Threshold:       176 degrees Fahrenheit 
                         (80 degrees Celsius).

Thermal resetting fuse controls internal temperature of the power transformer.

Threshold:         248 degrees Fahrenheit 
                          (120 degrees Celsius).

Unique electronic protection circuit guards against accidental abuse (e.g., overload, shorts across the output, excessive DC at the input or output, etc.).

 AC voltage fuses:

6.25 Amps slo-blo for 100/120 Volts (3 Amps slo-blo for 220/230/240 Volts);
0.125 Amps slo-blo for 100/120/220/230/240 Volts, internally mounted.