dave robinson wrote:Didier wrote:AlanMcKillop wrote:There is a lot of talk about echo unit's and 'that sound' or 'shadows sound', but imho the amp is the most important ingredient. I've heard numerous echo units being used in EF86 loaded AC's and in the right hands, most of them sound great.

I've heard comparative A/B tests with AC's amps using or not EF86, and there was no noticeable difference !
Didier
So does that mean it's all a load of nonsense ? I would certainly beg to differ and can back up my findings any time you wish to compare - how about you Didier?
It only means that hearing is highly subjective, and that listening memory is not reliable, even for long experienced musicians.
The only valid way to compare two different devices is to make instant A/B comparisons, setting up a system allowing to listen alternatively and quickly to the devices to be compared.
I listened to such a test with an AC30 fitted with a EF86 preamp, switching alternatively from the EF86 preamp to the normal ECC83 preamp. There was no noticeable difference...
I also attended an even more significant test using a well known "box" supposed to give "that sound", but this time it was a "blind" test, apart for the one who conducted the test (and said nothing during it), no one knew when the "box" was used or not. Then the audience (all of them long experienced Shadows' music listeners and players) was asked to tell when the "box" was used or not. The result was about 50/50, I was among those who were right, but it was probably a matter of luck, because the was no really noticeable differences.
I think all comparisons should be made with the same "blind" way, and I guess there would be a lot of surprises !
I will not have the cruelty to post again sound files which were posted some years ago by people who claimed they had at last reached "that sound"...
Didier