i have also swapped all these models around in my amps .ive often wondered if the different valves had more bass or treble etc as we associate pushed power amp valves with more bass... im not listening with headphones now but i agree with your assessment that there isnt a great tonal difference , but you can lose the range of gain where the guitar sounds nicest and you probably create hiss by turning up the amp to compensate for low volume hitting the power amp. it as interesting to see the graphic EQ . thanks.
@@LotharsGuitarSchool I thought it was about showing difference in sound and gain, guess you were testing V1. It is interesting to observe tubes didn't really sound different if input level was matches to gain of the tube, that shows guitar amp sound is dictated more by distortion (even in clean mode) than other things. I did a few tests with ECC88 vs 6N1P in pro audio preamp output driver designed for ECC88; despite tubes being similar and use of NFB they sounded very different. Without change in bias 6N1P always sounded muddy with ~5dB higher gain which made very good circuit sound bad. Changing bias didn't help which is probably what one would also find in guitar amps.
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i have also swapped all these models around in my amps .ive often wondered if the different valves had more bass or treble etc as we associate pushed power amp valves with more bass... im not listening with headphones now but i agree with your assessment that there isnt a great tonal difference , but you can lose the range of gain where the guitar sounds nicest and you probably create hiss by turning up the amp to compensate for low volume hitting the power amp. it as interesting to see the graphic EQ . thanks.
Yes, the graphic analyzer makes a more objective comparison possible.
Excellent Video Content!!
Much appreciated, Ernie!
ecc83 1:22 ecc82 4:30
All the tube alternatives are listed in the timeline!
Yup
Thanks - did you notice any differences?
You can't compare different types of tubes in same circuit because that only show one tube functioning properly, the rest are at least out of bias....
The goal was, to show the differences of amplification factors. You certainly can improve the performance by changing the bias.
@@LotharsGuitarSchool I thought it was about showing difference in sound and gain, guess you were testing V1. It is interesting to observe tubes didn't really sound different if input level was matches to gain of the tube, that shows guitar amp sound is dictated more by distortion (even in clean mode) than other things. I did a few tests with ECC88 vs 6N1P in pro audio preamp output driver designed for ECC88; despite tubes being similar and use of NFB they sounded very different. Without change in bias 6N1P always sounded muddy with ~5dB higher gain which made very good circuit sound bad. Changing bias didn't help which is probably what one would also find in guitar amps.