JJ 6550 Power Vacuum Tube (Matched)

3 Reviews
SKU: JJ-6550

Availability: Usually ships within 24 hours.

USD $‎57.95

Need matched power tubes? Don't worry! Price includes matching in any quantity you need for no extra charge. Need a matched pair? Just order "2" tubes. For a matched quad order "4" tubes. Matched sextets and octets are available as well.

The JJ 6550 vacuum tube can be used in any 6550 tube amp. The large plates allow for more efficient cooling and headroom. Whether your application is a hifi amp, guitar, or bass amp, the JJ 6550 power tube will be up to the job.

Other JJ Electronics tubes6550 Tube Types

Additional Information and Downloads

Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System

JJ 6550 Datasheet (PDF)

Download Adobe Acrobat PDF reader

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

3 reviews

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JJ 6550 | Low price doesn't mean low quality


I've been running these JJ-6550 in my SEUL power amp for over a year. I run them hard at 80 ma of current and 380 plate volts. They have been excellent. Very low noise and able to reproduce the full range of my hi-fi amp. Low price doesn't mean low quality.

JJ 6550 | Totally happy with these tubes.


Blew a tube on my Marshall Slash AFD 100. They were 10 years old and original so I swapped all 4 out for these JJ-6550 tubes. Don't know what the original tubes were as they had the Marshall label on them but they looked pretty fancy, not cheap at all. I have to say I am totally satisfied with the JJ tubes. I think the amp sounds better. Crisp and lots of detail, better than before. I don't think you ever get quantum differences, it's subtle. Don't think you could go wrong with these.

We'll balance and loud.


These brought my Marshall Mk II 50 watt Lead back to life! I tried EL34 tubes for about 10 years but they always sounded congested. Not anymore! My tube spring retainers even fit again.I did modify the preamp to Atomic Soldano specs before the switch.  But now the tone controls are so responsive that I can go from clean to crunch with just the twist of my guitar volume. Not possible with EL34's. These are damn impressive sounding for the $.