Topaz 211A stereo amplifier

SPECIFICATIONS

Available in limited edition numbered quantities - built to order only

TUBE COMPLEMENT: (4)

1   octal base 6SN7GT dual triode
1   octal base 6BX7GT dual triode or optional 6BL7GT for increased sensitivity
2   4 pin base 211 VT-4C large triode

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 was implemented to improve the low frequency response.

OUTPUT STAGE

Single ended and self-biased the 211's drive the exquisitely refined Audio Note transformers to new heights of realism. Improved low frequency response, lower distortion, greater clarity, and resolution are the result of the improved dynamic headroom offered by these heavier outputs. Individual selection of speaker load impedance (4 + 8 Ohm) is accomplished via dual contact high current switches. (40 ampere rating)

ALL STAGES Operate in class "A1" single ended. Self-biased...no adjustments (tweaks can swap valves without consequence) < ZERO FEEDBACK > No LOCAL or GLOBAL FEEDBACK of any kind!

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)

FREQUENCY RESPONSE
(reference to a 1 kilohertz sine wave at 1 watt RMS/8 Ohm output)

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

IMPUT IMPEDANCE   200 kW

ABSOLUTE PHASE   non-inverting

GAIN   27 dB   (0.55V RMS maximum for full output) using 6BX7 Driver)
    31 dB   (0.35V RMS maximum for full output) using 6BL7 Driver....*optional)

POWER OUTPUT   18 watts RMS   (short durations of greater than 50 watts peak music power for extended dynamic headroom)

NOISE & DISTORTION   below audibility

STAGE WIDTH   wide open

STAGE DEPTH   exceptional layering

PERCEIVED SOUND FIELD   precise imaging

CLARITY   crystal clear

POWER CONSUMPTION   325 watts continuous

WEIGHT
NET   106 lbs   (48 kg)
SHIPPING   117 lbs   (53 kg)

DIMENSIONS:

  16" W x 22" L x 10" H


LIMITED WARRANTY
TUBES   1 YEAR PARTS
COMPONENTS   3 YEARS PARTS & LABOR

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