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OWNER'SPAGE

 

Products

Power amplifiers
M1.2 Reference
     description  specs
M2.2
   
description  specs
ML2.2
   
description  specs
ML3 Signature
    
description  specs
Preamplifiers
LL2.1(regular/deluxe)
    description  specs
LL1.1 Signature
   
1 description 1 specs
L2 Reference
   
description  specs
LP1 Signature
    
1 description 1 specs
LP2.1 (regular/deluxe)
                phono preamp
    1 description   1 specs

 

1
  HYBRID POWER AMPLIFIER

 

1 1 1 1
11 1 1 1 1
1 1 1 1 
1 1 1
1 1 1
1 1 1 1

The above figures represent M2.2 measurements as performed 
by an independent party,
Mr. Bascom H. King of BHK Laboratory (bhk@rain.org)

 

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

 


 

220 Watts into 8 Ohms (41 Watts Class A operation). 
440 Watts into 4 Ohms (20.5 Watts Class A operation). 
700 Watts into 2 Ohms (10.25 Watts Class A operation). 
900 Watts into 1 Ohm (5.125 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

 



220 Watts into 4 Ohms (41 Watts Class A operation). 
440 Watts into 2 Ohms (20.5 Watts Class A operation).
600 Watts into 1 Ohm (10.25 Watts Class A operation).

Rated Output Voltage

 


HIGH  IMPEDANCE SETTING

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



  • 59.33 Volts peak into 8 Ohms, corresponding to 440 Watts peak.
  • 59.33 Volts peak into 8 Ohms, corresponding to 440 Wattspeak.
  • 52.92 Volts peak into 2 Ohms, corresponding to 1,400 Watts peak.
  • 42.43 Volts peak into 1 Ohm, corresponding to 1,800 Watts peak.


LOW  IMPEDANCE SETTING

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

 


  • 41.96 Volts peak into 4 Ohms, corresponding to 440 Watts peak.
  • 41.96 Volts peak into 2 Ohms, corresponding to 880 Watts peak.
  • 40 Volts peak into 1 Ohm, corresponding to 1,600 Watts peak.

Rated Output Current

 


HIGH  IMPEDANCE SETTING

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

 


  • 7.42 Amps peak into 8 Ohms, corresponding to 440 Watts peak.
  • 14.84 Amps peak into 4 Ohms, corresponding to 880 Watts peak.
  • 26.46 Amps peak into 2 Ohms, corresponding to 1,400 Watts peak.
  • 42.43 Amps peak into 1 Ohm, corresponding to 1,800 Watts peak.


LOW  IMPEDANCE SETTING

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



  • 10.49 Amps peak into 4 Ohms, corresponding to 440 Watts peak.
  • 20.98 Amps peak into 2 Ohms, corresponding to 880 Watts peak.
  • 40 Amps peak into 1 Ohm, corresponding to 1,200 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


 



280 Watts into 8 Ohms. 
480 Watts into 4 Ohms. 
780 Watts into 2 Ohms. 
1,000 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

 

 

300 Watts into 4 Ohms. 
500 Watts into 2 Ohms. 
780 Watts into 1 Ohm. 

Maximum (clipping) Output Voltage

 


HIGH  IMPEDANCE SETTING

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


 

  • 66.93 Volts peak into 8 Ohms, corresponding to 560 Watts
  • 61.97 Volts peak into 4 Ohms, corresponding to 960 Watts peak.
  • 55.86 Volts peak into 2 Ohms, corresponding to 1,560 Watts peak.
  • 44.72 Volts peak into 1 Ohm, corresponding to 2,000 Watts peak.


LOW  IMPEDANCE SETTING

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



  • 49 Volts peak into 4 Ohms, corresponding to 600 Watts peak.
  • 44.72 Volts peak into 2 Ohms, corresponding to 1,000 Watts peak.
  • 39.5 Volts peak into 1 Ohm, corresponding to 1,560 Watts peak.

Maximum (clipping) Output Current

 


HIGH  IMPEDANCE SETTING

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




  • 8.37 Amps peak into 8 Ohms, corresponding to 560 Watts peak.
  • 15.5 Amps peak into 4 Ohms, corresponding to 960 Watts peak.
  • 27.93 Amps peak into 2 Ohms, corresponding to 1,560 Watts peak.
  • 44.72 Amps peak into 1 Ohm, corresponding to 2,000 Watts peak.

LOW  IMPEDANCE SETTING

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

 

  • 12.25 Amps peak into 4 Ohms, corresponding to 600 Watts peak.
  • 22.36 Amps peak into 2 Ohms, corresponding to 1,000 Watts peak.
  • 39.5 Amps peak into 1 Ohm, corresponding to 1,560 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 220 Watt into 8 Ohms
@ rated line voltage:





(+0; -3dB) 4 Hz  - 155 KHz.


LOW  IMPEDANCE SETTING

at 220 Watt into 4 Ohms
@ rated line voltage:





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

Slew Rate

 

Vout=118.66 Volts peak-to-peak of
square-wave signal into 8  Ohms,
F=10KHz @ rated line voltage:


42 Volts per microsecond

Rise Time

 

Vout=118.66 Volts peak-to-peak of
square-wave signal into 8 Ohms,
F=10KHz @ rated line voltage:


2.2 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. 41.95 Volts RMS into 8 Ohms (110 W):

22 Hz – 22 KHz
A weighted




typically  72.5 dB
typically  78.2 dB

 

 
typically  96 dB
typically  101.5 dB

IM Distortion

 

HIGH  IMPEDANCE SETTING

(60Hz:7KHz  4:1) SMPTE:

from 0.1-220 Watts into 8 Ohms 
@ rated line voltage

from 0.1-440 Watts into 4 Ohms
@ rated line voltage

from 0.15-700 Watts into 2 Ohms
@ rated line voltage

from 0.1-900 Watts into 1 Ohm
@ rated line voltage







no more than 1%


no more than 1%


no more than 1%


no more than 1%

LOW  IMPEDANCE SETTING

              (60Hz:7KHz  4:1) SMPTE:

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

from 0.1-440 Watts into 2 Ohms
@ rated line voltage

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







no more than 1%


no more than 1%


no more than 1%

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


1.076 Volts RMS ± 2% for 220 Watts into 8 Ohms.

0.761 Volts RMS ± 2% for 220 Watts into 4 Ohms.

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

 0.628 Volts RMS ± 2% for 600 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 0.098 Ohm.

typically 0.098 +0.007 Ohm.

Damping Factor

 


at 1 KHz: 

from 20 Hz – 20 KHz:   


typically 82 re: 8 Ohm.
 
typically 82 +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 250 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:

8 Amps slo-blo for 100/120 Volts (4 Amps slo-blo for 220/230/240 Volts);
0.125 Amps slo-blo for 100/120/220/230/240 Volts, internally mounted.

General

 


POWER CONSUMPTION

Nominal:


Maximum:

 


Typically 280 Watts @ rated output @ 8(4) Ohms (class A operation) and at idle.

Typically 1000 Watts @ rated output @ 1 Ohm 
(low impedance setting).

Burn-in Time at Factory:

Minimum 72 hours.

Recommended Burn-in Time in End-user's System:

Minimum 200 hours.

Warm-up time:

Minimum 35 minutes.

Dimensions

8.25"(21cm)H x 17"(43.2cm)W x 19.5"(49.5cm)D 
[add 2.8125"(7.14cm) of depth for front and  rear handles].

Unit weight

71 Lbs (32.2 Kg).

Shipping weight

97.4 Lbs (44.2 Kg).

Tube Complement

V101 - 6922 (second amplification stage)


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