Electro-Harmonix 12DW7-EH Preamp Vacuum Tube

1 Review

Availability: Usually ships within 24 hours.

USD $‎41.95
The Electro-Harmonix 12DW7 preamp tube can be used in place of any 12DW7 or 7247 vacuum tube. The 12DW7 tube is used in some vintage Ampeg amplifiers.

Other Electro-Harmonix tubes12DW7 Types

Additional Information and Downloads

Electro-Harmonix 12DW7-EH Datasheet (PDF)

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Warranty Information and Return Policy

Warranty Period: 3 months

All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)

If you receive a tube that does not perform to the manufacturer's specifications, please do the following:

- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.

Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.

We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.

These guidelines may be updated without notice.

Ratings & Reviews

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Electro-Harmonix 12DW7-EH | Excellent for Hot Rod Deluxe V2 socket


From advice that I've heard from other Fender Hot Rod Deluxe owners, I tried out this EH-12DW7 tube in the V2 socket on my Mk IV Hot Rod Deluxe. What a difference! It doesn't make any changes to the clean mode (which bypasses the lower gain triode of the 12DW7) but it reduces the gain of the fourth preamp stage in the drive/more drive modes, allowing much better volume control and allowing even the more drive mode to be turned down to a clean tone, all the way up to a full volume, heavy overdrive sound, but with a nice, rich sounding overdrive. The sound quality of the Electro Harmonix 12DW7 is great; it should be good for other amps that either specify a 12DW7 or could benefit from the 12AU7 characteristics of the second triode.