Amp tinkerers and people who aren't afraid of 700 volts or so in here....

Moderators: Slowy, Capt. Black

#826077
have you done anything with a 'depth' dial? Ryan put one on my old soldano, and it was great. I've got them on my two marshalls as well. you can thicken up the sound at lower volumes.
#826081
Optical wrote:Also the SLO tone isnt totally locked up in the transformers. Ive built a SLO and done a lot of transformer swapping, including a deyoung set and it isnt as important as internet folklore suggests. The cheaper Soldano models dont have 100% the same preamp circuit so of course they are going to sound a little different.


Isn't there basically 2-3 minor differences between the SLO and HR preamp? I had both and found the gain structure virtually the same but the SLO has the big 3D-ness which aren't there in any other derivative of that circuit I've tried. I didn't buy into the whole magical transformer bizzo either... until I tried one.
#826082
AiRdAd wrote:have you done anything with a 'depth' dial? Ryan put one on my old soldano, and it was great. I've got them on my two marshalls as well. you can thicken up the sound at lower volumes.


I remember Ryan saying the hardest part about the depth mod is drilling the hole on the chassis. :rofl:
#826121
godgrinder wrote:Isn't there basically 2-3 minor differences between the SLO and HR preamp? I had both and found the gain structure virtually the same but the SLO has the big 3D-ness which aren't there in any other derivative of that circuit I've tried. I didn't buy into the whole magical transformer bizzo either... until I tried one.


I think it depends on your perspective, yes there are about 3 component value differences and that is insignificant from an electrical component perspective. But those components are right at the start of the preamp and that means the harmonic content generated by that first stage (the SLO generates more harmonics), and that multiplication of that harmonic content through subsequent stages means that the net result is quite significant from a tone and playing dynamics perspective. For example, there are only two component differences (which set the first stage mids content) between a SLO and a dual rec preamp and the end result is quite different sounding circuits.

Edit, just looked at the HR circuit again and there is a cathode follower missing in the HR and the power amp NFB is different too. Not really going to sound or feel close to a SLO imo. Anyway, I think the point is unless you are swapping OPTs with everything else being the same, there are too many other variables which will dominate the differences experienced.
#843791
higainer wrote:Dredge.

Saw the latest Tone Talk interview with Mike Soldano.
The new BAD built SLO’s should start appearing in 10 weeks according to Friedman.
Will be interesting to see how they stack up to the OG SLO’s.


Agree. Apparently the new transformers he uses sounds slightly better.
I really like the idea of the 30w SLO eh