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Electro Harmonix - 7591A EH Duet Platinum - Matched Pair

Electro Harmonix - 7591A EH Duet Platinum - Matched Pair

The 7591A EH tubes are smooth, yet punchy, with a sweet harmonix finish, from this year's vintage from Electro Harmonix. A real 7591A! Ampeg owners, rejoice! Matching power tubes for equal current draw is important for maximum performance. Electro Harmonix's platinum matching process consists of a 24 hour tube burn-in period followed by a bias (plate) current measurement in milliamps to ensure accurate matching.

All Electro-Harmonix tubes are made in Russia.

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