This tube boosted the midrange and "warmed" up the tone a bit too much.

With these tubes, I have no doubt these amplifiers are acting as good as or better that their impressive specs

With these tubes, I have no doubt these amplifiers are acting as good as or better that their impressive specs

Very dynamic and detailed in my Bellari Phone Pre-amp....good value....!

The clean channel on my amp was very clean and chimey, sounded great.

The only reason I am giving them 3 stars is that the clean channel sounded rich and chimey, and so they might be suited for some applications, but definitely not a guitar amp where you want to overdrive it or have any distortion.

With these tubes, I have no doubt these amplifiers are acting as good as or better that their impressive specs

Put this Tube in my Art Tube studio MP preamp (yes I know its not the best preamp)

With these tubes, I have no doubt these amplifiers are acting as good as or better that their impressive specs

As others have commented it provided excellent clarity, gain, and improved bass response.

But when I switched to the lead/gain channel it sounded like poo-poo.

With these tubes, I have no doubt these amplifiers are acting as good as or better that their impressive specs

Worked just fine, low noise

Excellent vendor would buy again

If you can afford it, buy tested NOS from a reputable vendor.

Vendor was phenomenal in fulfilling/shipping the order, rec'd w/in 2days after placing order

While this product has a very good reputation, it did not compliment the sound of my Vox ac15c1.

Good product

The bass response is powerful and clear, detailing all of the aspects of the notes whether from Steely Dan's punchy clean style, Chicago's flowing melodic style, or Yes with that distinct Rickenbacher/rotosound combination

They make my beautiful vintage style tube amp less of a conversation piece

Given this excellent performance in my High Fidelity system, I would agree; these tubes contribute no discernable distortion which would make them undesirable in a most guitar amplifiers, but it makes them AWESOME in a home stereo!My choice of the Mullards for the 12AX7 and the 12AU7 tubes was based on similar research where the Mullards were being criticized as too clean for guitar amp service but praising the small Tung-Sol tubes for a sweet guitar amp tone

With these tubes, I have no doubt these amplifiers are acting as good as or better that their impressive specs

With these tubes, I have no doubt these amplifiers are acting as good as or better that their impressive specs

Given this excellent performance in my High Fidelity system, I would agree; these tubes contribute no discernable distortion which would make them undesirable in a most guitar amplifiers, but it makes them AWESOME in a home stereo!My choice of the Mullards for the 12AX7 and the 12AU7 tubes was based on similar research where the Mullards were being criticized as too clean for guitar amp service but praising the small Tung-Sol tubes for a sweet guitar amp tone

This tube boosted the midrange and "warmed" up the tone a bit too much.

and it was very easy to adjust the tone and gain to find a sweet spot at a lower volume than I was accustomed to.

It had bad trebly tone and not much power

Again, I am sure that they would work well in other darker sounding amps or stereos--just didn't give me the 'wow,' that I wanted to hear.

Amp works good again but it sounds flat , no rich harmonics

My amp was not very humbucker-friendly with the stock tubes

I do alot of tube swapping and for my cheap little amp

Definitely sweetened up my Marshall hybrid practice amp.