Review – JJ 5751 Tube
The JJ 5751 is an excellent 5751 vacuum tube and does exactly what you want from a tube with this designation. It has a very low noise floor and no tendency toward microphonics. It is…
Review – JJ E83CC / 12AX7 Tube
Everything special about this JJ E83CC amplifier tube is under the hood. It looks like the JJ ECC83S vacuum tube and if it wasn’t for the screening you couldn’t tell them apart. So why a…
Review – Shuguang 12AX7B Tube
Although this Shuguang 12AX7B vacuum tube is listed as a variant of the 12AX7A amplifier tube there is really very little difference to discuss. Physically, they look virtually identical. There may be a slight difference…
Review – Tungsram ECC83 / 12AX7 Tube
When I first looked at these Tungsram ECC83 amplifier tubes I thought of vintage Mullards. I don’t know if they were using the old Mullard equipment to build them or if they were just trying…
Review – Electro-Harmonix 7025 Tube
Here’s something completely different from Russia. Electro Harmonix has released the all-new EH 7025 Tube and it’s quite a departure from their previous 12AX7 offering. Clearly this was new from the ground up and not…
Review – Shuguang 12AX7A Tube
When the tube stockpiles dried up in the 80’s, and before modern tube production ramped up, there was little available on the market except the Shuguang 12AX7A vacuum tube. These 12AX7 amplifier tubes have been…
Review – JAN-GE 12AX7WA Tube
If you have a Fender amp from the 60’s this JAN-GE 12AX7WA vacuum tube was often used as original equipment. The JAN-GE 12AX7 amplifier tube is a classic and you won’t find a better replacement…
Review – Preferred Series 12AX7 Tube
The Preferred Series 12AX7 vacuum tube is a versatile, quiet amplifier tube that will be at home in just about anyone’s guitar or HIFI rig. In a Fender Champ they displayed no microphonics or rattling,…
Review – Gold Lion CV4004 / 12AX7 Tube
The Genalex brand has earned a reputation as the premium tubes coming out of Russia. The Genalex Gold Lion CV4004 / 12AX7 vacuum tube is a fine example of why they got there. Tube construction…
Burning In 6SN7 Tubes for the Dark Voice 336SE Headphone Amp
If you have a Dark Voice 336SE headphone amp you likely had the same thought as many other owners. Why does such a nice little amp come with such poor vacuum tubes? Well most Chinese…
