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Electro-Harmonix KT88 Matched Quad Set
Electro-Harmonix KT88 Matched Quad Set
Canor

Electro-Harmonix KT88 Matched Quad Set

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Available from

Knox Audio New South Wales Simply HiFi Western Australia Vinyl Revival Victoria HiFi Connoisseur Queensland Magenta Audio South Australia

Precisely selected, quad matched vacuum tubes

The Electro-Harmonix KT88 Matched Quad Set is a factory-matched set of four current-production KT88 beam power tetrode vacuum tubes. It is widely used in high-end stereo amplifiers, monoblocks, and high-power guitar amplifiers that require four matched output tubes.

Key Features

  • Tube Type: KT88 Beam Power Tetrode
  • Configuration: Factory Matched Quad (4 tubes)
  • Manufacturer: Electro-Harmonix
  • Production: Current production
  • Replacement For: KT88, 6550, and 6550A (when supported by the amplifier and correctly biased)
  • Application: Hi-fi audio amplifiers, monoblocks, integrated amplifiers, and guitar amplifiers

Technical Specifications

Tube Type

KT88 Beam Power Tetrode

Heater Voltage

6.3 V

Heater Current

1.6 A

Plate Voltage (Typical)

400 V

Plate Current (Typical)

90 mA

Screen Grid Voltage

225 V

Screen Grid Current

5 mA

Transconductance

9.5 mA/V

Input Capacitance

18.5 pF

Output Capacitance

12.5 pF

Transfer Capacitance

1.1 pF

Maximum Cathode-Heater Voltage

+300 V / -200 V

Dimensions

Approximately 125 mm height × 52 mm diameter
Electro-Harmonix KT88 Matched Quad Set
Electro-Harmonix KT88 Matched Quad Set

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