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TELEFUNKEN

6550-TK Vacuum Tube, Matched Quad

Tubes

Power vacuum tube matched quartet, beam-tetrode design, 35-watt output per tube, high gain, stable operation, rich balanced tone

$660.00 CAD
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Description

The 6550-TK Vacuum Tube, Matched Quad is a matched set of four high-output beam-power tetrodes for compatible guitar amplifiers and Leslie speaker systems. Each tube can deliver 35 watts of output, providing strong gain, dependable stability, and the powerful tonal character associated with classic Marshall, Fender, and Ampeg tube circuits.

Manufactured in partnership with JJ Electronic in Slovakia, these new-production tubes are rigorously tested, cryogenically treated, and extensively burned in. Their harmonically rich, tonally balanced response and long service-life characteristics support reliable performance across demanding amplification applications.

Features

Matched Quartet
Four power tubes are selected for balanced and consistent operation.

High-Output Performance
Provides the strong power and gain required by demanding amplifier circuits.

Stable Operation
Maintains dependable performance in guitar amplifiers and rotating speaker systems.

Rich, Balanced Tone
Produces a harmonically detailed sound with a controlled tonal response.

Long Service Life
Supports extended use with fewer replacement cycles.

Cryogenic Treatment
Each tube receives specialized processing as part of quality control.

Extensive Burn-In
The complete quartet is thoroughly conditioned before use.

Rigorous Testing
Every tube is evaluated for reliable and consistent performance.

Specifications

General Specifications
Device Type: Power vacuum tube
Tube Configuration: Beam-power tetrode
Production Type: New production
Quantity: Matched quartet
Country of Manufacture: Slovakia

Electrical Characteristics
Output Power: 35 W per tube
Output Characteristic: High output
Gain Characteristic: High gain
Stability: High
Application: Guitar amplifiers and rotating speaker systems

Tonal Characteristics
Harmonic Response: Rich
Tonal Balance: Balanced
Sound Character: Powerful

Processing and Testing
Matching: Quartet matched
Treatment: Cryogenic
Burn-In: Extensive
Testing: Rigorous

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