indeed...it looks a bit better being more simmetrical, probably due to lower input bias current, yet it's not RRO so you won't go too low with the supply rails.a bit slower so it needs a bit of compensation around 1 megHz not like the others which are ringing around 10 meg , but 5pF is more effective here as the opamp is better suited for audio.How about Ad8672? Its specifically for nested feedback duties
I'd rather try 220uF for C1 ...even though i can't sim it this century.Shouldnt there be decouplers to gnd after r3 r6 also or does it not care?
What does other measurements look like? Maybe r3 c1 is forming an aggressive lpf
What do you mean? It has the most simmetrical arangement you coyoul could get for two channels...It's just a downgraded version of THS6012.Check its datasheet.You could buy THS6012 instead but that's not going to get you a better sound .They are made to work in the megahertz range...so you need a good pcb artwork but that's not something out of reach.And they are already the highest end chips on the market...You can buy high end circuits based on them in any shape and form from countless manufacturers...I have a friend that's using two of them in parallel on one channel to drive some Fostex based horns for more than a decade now...From anacdotes alone 6120 is very appealing but their pin arrangements turn me off. Its a nightmare if u want any high end configuration out of it.
This buffer yields better distortion performance and wider bandwidth than the diamond buffer.If used with silicon transistors you need to tame it by shunting the base-collector junction of the final transistors with almost 1nF capacitance to cancel some 10 Mhz oscillations.The buffer itself is at about -100db thd so no global feedback is needed.As i used germanium transistors i didn't need any BC compensation. https://www.diyaudio.com/community/threads/germanium-foundation-chapter1.381869/#post-6910850Hey dont knock it until you try it. This one has that certain magic and thats compared to countless circuits ive already tried
Very nice Dreamth. Ive currently made myself busy with the vssa topologyThis buffer yields better distortion performance and wider bandwidth than the diamond buffer.If used with silicon transistors you need to tame it by shunting the base-collector junction of the final transistors with almost 1nF capacitance to cancel some 10 Mhz oscillations.The buffer itself is at about -100db thd so no global feedback is needed.As i used germanium transistors i didn't need any BC compensation. https://www.diyaudio.com/community/threads/germanium-foundation-chapter1.381869/#post-6910850