Specifications

 

Rated Power (8 ohms):

900 watts RMS continuous,

900 watts RMS with vocal and music

Frequency Response:

2 Hz to 85 kHz (-3 dB) 

Distortion:

Less than 0.5%

Power Bandwidth:

18 Hz to 28 kHz

Line Inputs:

2 (RCA); Normal (AC coupled) or
Lab Direct (DC coupled)

Input impedance:

100 K ohms 

Gain:

36 dB

Tube complement:

One 12BY7A, one 12AL5, three 12BY7A,
and twenty KT-120s

Hum and Noise:

Better than 120 dB, referred to 700 watts,
A-weighted 

Bias:

Rear panel potentiometer adjustment

Source Impedance:

1.7 ohms

Speaker Output Taps:

2, 4, and 8 ohms.

Designed to drive any load 0.75-ohm and higher

Color:

Deep burgundy with gloss black, natural aluminum, and bright chrome highlights

Dimensions

Amplifier Chassis: 9” (228.6mm) x 13” (330mm) x 20” (508mm) x 2

Power Supply Chassis: 9” (228.6mm) x 11” (279.4) x 20” (508mm) x 2

Weight:
Amplifier Chassis: 55 lbs. (25 Kgs) x 2

Power Supply Chassis: 45 lbs. (20.4 Kgs) x 2

Warranty:

Lifetime

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Specifications subject to change without notice.

Silver Seven 900 Tube Power Amplifier

​

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Features

 

  • 900 watts RMS into 8 ohms

  • Under 1-ohm capability

  • Separate amplifier and power supply chassis

  • Point-to-point wiring throughout

  • Tubes

    • 12BY7A x 1 (Input Stage)

    • 12AL5 x 1 (DC Restorer)

    • 12BY7A x 3 (Driver and Phase Inverter

    • Tungsol KT120 x 20 (18 for output; two for screen regulators)

  • Output Transformer

    • Super-wide-band proprietary design with hand-wound, interleaved windings of copper with silver interconnects on a high-tensile steel core; low leakage inductance

  • Controls

    • Volume Control

    • 2-position Feedback Switch

  • Four-function meter

    • Bias setting
      (in conjunction with rear panel control)

    • Tube Tester
      (tests at actual voltage and current conditions)

    • Tube Matcher
      (cool, but not really necessary)

    • VU Meter

  • Rear Panel

    • Power Switch

    • IEC AC Input Socket

    • Line Fuse

    • Tube Fuse

    • Recessed Tube Bias Control

    • 5-way binding post outputs

    • Common, 2, 4, and 8-ohm speaker load

    • XLR and gold-plated RCA Inputs

  • Physical

    • Pure silver solder used for all internal connections

    • Burgundy hand-rubbed piano lacquer finish

    • Convection cooling

    • Individually hand-signed by Bob Carver

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