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User reviews on Guitar Amp Tube products

Groove Tubes 12AX7R (Groove Tubes - GT-12AX7R)

By MGR/Billy, 21/02/2011
The 12AX7R is Groove Tubes' take on the classic Russian sounding tubes. The Russian tubes are known for having higher quality control standards and a darker lower gain tone.

Groove Tubes has some issues a few years ago, but I feel they are back on top as far as mass produced tubes go.

The preamp tubes in a my bass amp went bad and I had to get something new. My local shop had a Bugera tube, an Electro Harmonix tube (what was previously in the amp) and the Groove Tubes 12AX7R.

I bought the Electro Harmonix tube as well as the Groove Tubes 12AX7R to compare. To my ears the Groove Tubes had less noise and I was able to get a louder and cleaner sound out of the amp, where the Electro Harmonix tube distorted quicker.

I believe I paid $15 for each of the Groove Tubes

Sounds great and I have been gigging heavily with the tubes in my bass amp for close to 2 years.

I also like that they are readily available at most guitar shops.

I can't think of any room or need for improvement. I like that there is a reasonably priced, decent sounding tube around.

So far so good. Two years of hard work on these tubes. Moving, weather changes and they keep in truckin'

My favorite tube out there for reliability and getting a loud and clean tone.

This review was originally published on http://www.musicgearreview.com
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The best 12ax7 from Sovtek (Sovtek - 12AX7LPS)

By MountAnDewMe, 29/07/2012
If you are like me you have probably tried many different tubes over the years. I had a bad experience with Sovtek 12ax7 tubes in the past and found them to be very unmusical. The experience left a bad taste in my mouth for the name for years. A few years ago I took the advice of a trusted retailer who called them "One of the finest 12ax7 builds I have seen in modern production." I replaced the tubes in my preamp with them and was simply shocked at how good they really did shine.

The main differences in this line of 12ax7 are denoted by the LPS in the name. It refers to the use of long plates and a spiral wound filament. These tubes produce a very rich tone across the useable frequency spectrum and are designed to reduce hum in an AC circuit. It is a quality tube in a preamp or for use as a phase inverter. Just be sure to order a tube with balanced triodes for the PI slot, but that goes for any tube in that position. The only downside to the tube is inherent to the long plate design. If you are using them in a combo where they will be subjected to high vibrations they may develop micro phonic problems quickly.

They function well in all applications I have tried them in. In a clean channel they sound full and warm, while not being muddy. The mids are complex and satisfying. The highs have just enough shimmer to make them pleasurable, not harsh like some older productions from Sovtek. These tubes do especially well in a high gain situation and seem to go a bit farther than most other brand. They seem to compress a bit less and as a result offer more useable gain while retaining their tone. I find the lows to be well defined under these circumstances. The mids are well balanced, and the highs very complimentary neither smooth or harsh but just right to my taste.

There are many fresh new builds available today that I will eventually get around to trying. Many of them are from the New Sensor Company which owns a lot of the branded tube companies we now have available to us. The quality from their plants has risen over the years, which is good news to all of use tube amp users. With that being said I will always have some Sovtek 12ax7LPS tubes in my tube locker whether or not they are in my amp or not. They have proven to be a valuable component to me over the past few years and is the tube I use as "the bar" when I preview others.
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powerful preamp tube (Tung Sol - 12AX7)

By MountAnDewMe, 18/08/2013
I had been waiting for some time to try these particular 12ax7 tubes out. I had read a great deal of good things about this model of tube and had very high expectations going into the purchase. I ordered these to go into the third high gain channel of my VL503. I had been very happy using the Sovtek 12ax7lps across the board in that amp for years. This is an early nineties model amp designed by Lee Jackson for those not familiar with the model the third channel is his custom modification design from when he used to modify Marshall JCM 800s for many name player back in the 1980s. Very loud, huge roar and growl with a lot less of the bad part of the upper registers. The Sovtek tubes had a very full and rich quality but I had to know how these tubes would perform given all the hype I had read on them.
At first I was a bit disappointed with the Tung Sol tubes, they had a harsh quality I was not accustomed to and honestly did not appreciate in that amp. I however gave them a good chance to break in and I am fortunate that I had the patience to do so. After about 8 hours of time they started to sound much better. I can say they have a very high tolerance to gain and sound very good when pushed hard. They do not seem to compress in a bad way but stay open sounding as you throttle them. They cover the full sonic range of the channel with ease and authority. They however are not a smooth sounding tube. They have a higher level of clarity to them. They are not brittle or harsh but simply clearer than I am used to with the LPSs. The bass is a bit more well defined as a result and that is a bonus because that channel of the amp has a tendency to get boomy and now the low tone control has a bit more functionality than with the Sovteks in there. I would not however say they are superior or worse than the Sovteks but simply different in a good way. Where the Sovteks add a smoother compressed fell these have a more open and airy feel. These will not replace any of the tubes I use on a regular basis but instead simply offer an additional soundscape that I find pleasurable and useable.
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News Guitar Amp Tube

[NAMM] [VIDEO] New Roland tone capsules & amp

Published on 01/26/16
At the NAMM, Roland has released a new Tone Capsule for its Blues Cube amps, and introduced a new amp: the Blues Cube Hot.

[NAMM][VIDEO] Roland EJ Tone Capsule

Published on 01/24/15