SPECIFICATIONS
TOPAZ 572M MONOBLOCK

TUBE COMPLEMENT ( 4 each per monoblock )

1 octal base 6SN7GT dual triode
1 octal base 6BX7GT dual triode
2 SV-572-10 SVETLANA large triode rated for 125 watts plate dissipation

1ST & 2ND STAGE

The large octal based triodes have lower microphonics and improved resolution over their smaller 9-pin counter parts. Our exclusive use of exceptionally large value Solen polypropylene coupling capacitors is one of the reasons for our extended low frequency response.

OUTPUT STAGE

Single ended and self-biased, each Svetlana directly heated triode( DHT ) drives its own Audio Note output transformer and merges the two outputs to get 45 watts (RMS) of pure CLASS A1 power output. Each monoblock contains two channels identical to the Topaz stereo version. The output transformer windings from each channel are added together using high current toggle switches to allow the selection of speakers rated for 2, 4, 8 or 16 Ohm loads. This is the most ideal (pure) way of doubling the output power and avoids the parralleling of output tubes. It also gives better low and high frequency response than would occur when using only a single output transformer of an equal power rating. The reason for this is the inverse effect ( between the low/high frequencies ) that the amount of iron in the output transformer has on the frequency response.

ALL STAGES Operate in class "A1" single ended and contain automatic self-biasing circuitry NO FEEDBACK of any kind is required from our low distortion linear amplification.

POWER SUPPLIES

MECHANICAL CONSTRUCTION

CIRCUIT BOARDS (Hand crafted Vectorboards using precision double turret terminal posts)

The components are mounted on Vector boards which contain swaged terminal post. These posts are divided into two areas. The wiring used is laid out on both top and bottom of the board and is soldered to the bottom layer of the terminal post. This point to point wiring allows the highest possible component density while maintaining the shortest possible SIGNAL PATH! The components are then soldered into place on the top layer of the terminal which allows the replacement of any part without removing the circuit board. High quality Teflon coated Silver plated OFHC copper wiring is used where appropriate and silver solder is used throughout.

AUTO-SEQUENCING (Power on cycle completes in 60 seconds)

Three time-delay relays provide proper power sequencing for stabilized circuitry before use and to provide extended tube life.

STANDBY SEQUENCE 1 Allows filaments to reach operating temperature before applying high voltage. Can also be invoked manually via the POWER SWITCH.
POWER SEQUENCE 2 Applies high voltage to input stages and allows circuit elements to stabilize before next sequence.(red LED lights)
POWER SEQUENCE 3 Applies high voltage to output stage. (Green LED lights--red LED turns off)
POWER SEQUENCE 4 A few seconds later the auto-mute is disengaged completing the turn-on sequence.

POWER SWITCH SETTINGS (A 3 position toggle provides the following functions:)

TOP ON ( auto-sequencing )
MIDDLE OFF  
BOTTOM STANDBY ( sequence 1 only )

IMPEDANCE MATCHING: Two high current toggle switches enable setting for 2,4,8 or 16 ohm speakers and can be switched while in operation.

CONNECTORS: Two sets of RCA input and two sets of WBT output connectors. This feature is useful for Bi-Amping or Bi-Wiring

FREQUENCY RESPONSE: (reference to a sine wave at 5 watts RMS/8 Ohm output)

1. +/- 0 dB FLAT 100 Hz to 10 kHz
2. + 0 dB/ -1 dB 20 Hz to 25 kHz
3. + 0 dB/ -3 dB 16 Hz to 37 kHz

INPUT IMPEDANCE:

100 KW

ABSOLUTE PHASE:

non-inverting
GAIN: 25dB (0.75V RMS maximum for full output)

POWER OUTPUT

45 watts RMS each monoblock

NOISE & DISTORTION

below audibility

STAGE WIDTH

wide open

STAGE DEPTH

exceptional layering

PERCEIVED SOUND FIELD

precise imaging

CLARITY

crystal clear

POWER CONSUMPTION

375 watts x 2 = 750 continuous watts
WEIGHT NET: 104 lbs x 2 = 208 lbs ( 95 kg )
  SHIPPING: 238 lbs (108 kg)

DIMENSIONS: 16" W x 22" L x 10" H (each monoblock)

LIMITED WARRANTY
  TUBES 1 YEAR
COMPONENTS 3 YEARS PARTS & LABOUR

EXTENDED WARRANTY (See warranty registration)
  COMPONENTS ONLY 20 YEARS PARTS & LABOUR

LIMITED EDITION

>> Maximum production is 4 pairs per year <<

(each unit comes with a gold plated solid brass nameplate
that is individually engraved with its own unique serial number)