7591 / 7868 Tubes > For your classic amplifiers - BOI AudioWorks from BOI AudioWorks
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7591A / 7868

Modern Audio Tube

7591 tube was originally introduced in 1959. It is a high output audio power tube that is flexible and easy to design with. Consequently, 7591 and its siblings were used in vast number of home audio equipment in the 1960s.

7591 vs 7868

7591 and 7868 have the same internals, and electrically they are the same. 7591 comes in octal base, while 7868 is in compactron package. Since they plug in to completely different sockets, they are not interchangeable. Be sure to select the right type when ordering.

Check the height

Current production 7591 work and sound great, but they are a bit taller than original 7591 tubes. Please check the height in product description to make sure you have clearance in your amp.

Tight fit of 7868

Please note that Electro-Harmonix 7868 pins are slightly fatter, making it a very tight fit in sockets. You will have to be very careful plugging it into your amp.

Quick Lookup

Mfr/ProductPairQuadSextetNote
JJ/Tesla 7591S $36.00 $72.00
Electro-Harmonix 7591AEH $39.00 $78.00
Electro-Harmonix 7868EH $57.50 $115.00

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Electro-Harmonix

7591AEH Matched Pair

Reproduction of NOS 7591A found in many vintage gear such as HH Scott, Fisher, Eico, McIntosh and Ampeg. Measures 3 1/4 inches (85 mm) tall and 1.45 inches (37 mm) dia so please make sure you have clearance.

Fits and sounds superb in our McIntosh MC225. Price is for a matched pair.

Available to order
7591AEH Matched Pair Buy Now $39.00

Electro-Harmonix

7591AEH Matched Quad

Price is for a matched quad of 7591AEH. These fit and sound excellent in McIntosh MC225.

Sold out - Please inquire
7591AEH Matched Quad

JJ/Tesla

7591S Matched Pair

Close in size to original 7591, this octal based tube is an excellent substitute for any NOS 7591. Measures 3.1 inches (79 mm) tall and 1.27 inches (33 mm) dia. It fits in HH Scott and other vintage amps, and works great in amps like Ampeg Mercury.

In stock
7591S Matched Pair Buy Now $36.00

JJ/Tesla

7591S Matched Quad

Price is for a matched quad of 7591S.

In stock
7591S Matched Quad Buy Now $72.00

Electro-Harmonix

7868EH Matched Pair

Great news for all Fisher owners! 7868EH is a faithful reproduction of NOS 7868 tubes and is a drop-in replacement. 7868EH is a very rugged tube that will take voltages far beyond the original rating, and has proven to provide excellent sonics in our own Fisher.

Price is for a matched pair.

In stock
7868EH Matched Pair Buy Now $57.50

Electro-Harmonix

7868EH Matched Quad

Price is for a matched quad of 7868EH tubes.

Available to order
7868EH Matched Quad Buy Now $115.00

NOS OFFERINGS

The following is NOS and vintage tubes in this category. Due to the scarcity of some items, inventory will change constantly, so please check back often. Be sure to check out our NOS terms.

The photos of NOS tubes are representative samples and actual NOS tube shipped may vary. "Various" means we have multiple brands in stock.


Various

7868 NOS

PENTODE, BEAM POWER AMPLIFIER
American made NOS

In stock
7868 NOS Buy Now $65.00

Various

7868 USED

PENTODE, BEAM POWER AMPLIFIER
American made USED

Sold out - Please inquire
7868 USED
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