Electro-Harmonix 7591A Platinum Matched Quad Amplifier Tube

Pick up a modern replacement for 7591 power tubes to make your amp sound like new again. A factory 24-hour burn-in period ensures great tone out of the box.
Electro-Harmonix 7591A EH's are available in platinum matched sets. Our platinum matching process consists of a 24 hour tube burn-in period followed by a bias (plate) current measurement in milliamps. Please specify matched tube grouping (ie. pair, quad, sextet, etc.) when ordering (no odd-quantity groups, please).
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Dimensions and Weight in Packaging
Matched Duet
Shipping Weight: 0.25 lbs
Shipping Dimensions: 5 x 4 x 2 in
Manufacturer Part Number (MPN): EHX 7591AEHD
Matched Quartet
Shipping Weight: 0.5 lbs
Shipping Dimensions: 5 x 4 x 4 in
Manufacturer Part Number (MPN): EHX 7591AEHQ
For support or warranty questions, please contact the manufacturer:
Phone: 718-937-8300
(1 ratings)
Submitted January 7, 2015 by Gary Soldat in West Chicago, IL
"Electro-Harmonix 7591A output tubes"
Verified Customer zZounds has verified that this reviewer made a purchase from us.
Tubes are beautiful. However, the tubes are taller than all 7591A tubes I have used in the past. Thus, if one sufficient clearance above his existing 7591A tubes, the Electro-Harmonix tubes are fine.
Musical Background:
In 1966 I sang in a group with my future fiancee. The group liquidated, but I am engaged presently.
Musical Style:
Progressive Jazz
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