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Started by megatrav, December 28, 2023, 03:02:36 PM
Quote from: phatt on February 20, 2024, 08:59:41 PMhi Megatrav,Wise not to focus on one aspect like Efficiency.Heck, Valves waste a lot of energy as heat yet they are still considered the holy grail of tone for a lot of guitar players.There are just so many rabbit holes in this field that are mostly a waste of time.I have 3 Valve Amps but my main setup is a pedal board which delivers a great sound into an old 70's 80's era Keyboard Amp.If you research how Valves actually work you will realise that a lot of the magic is due to a very poor Power supply.Depending on the design With no signal the HT voltage might read 400VDC in a valve amp. Turn up the volume and hit a big power chord hard and that 400V will drop like a brick, You might see it drop by 100V or more, depends on The ability of the PSU design.As that signal fades away that voltage rises back up.This is effectively causing compression so the sound level actually drops and limits the absolute SPL and as the Voltage rises back up it gives the impression of more sustain.But with SS amps the supply voltage is very stiff and hence no magic sustain.A SS 40 volt supply might only sag 2 or 3 Volts and by then you get into hard clip which is ugly, so hence SS gear gets a bad reputation.So to recreate that effect with SS gear you will need a compressor.I do all of that with my pedal board and the Amp just makes it louder.The Amp adds very little colour to the final sound although it does have a spring Reverb which adds a final touch. I use 3 OD dirt pedals into my Compressor.the Gain of all 3 dirt pedals are set fairly low and as you turn each one on you get more drive. And the compressor does 2 jobs obviously it adds compression but it also keeps the absolute SPL in a set range so when I play leed parts nothing gets too loud.I use an optical compressor as they tend to work very well for OD rock guitar sounds.As for Class D stuff I've noticed that the freq response often goes down way too far and that can be a big problem if you are trying to reproduce the classic sounds.Understanding and limiting the bandwidth of your gear will help refine your sound.Too much Low and High freq will just frustrate you and drive you crazy.There are many ways to great tone and even when you get there you will find that different venues and rooms can give different results. I have built many circuits and thought I had cracked the holy grail only to find that when I played live it sounded like crap.If it interests you I posted a recording of my gear on here a while back.This will give you some idea of what can be done with all SS gear.https://www.ssguitar.com/index.php?topic=5309.msg41595#msg41595 Regards from an old bloke who has spent lots of time down these rabbit holes, Phil