AHX123 - Hi, There seems to be some relevant context missing from the question. In the chatroom where you were receiving advice kindly given by periblepsis, you said that you have built the circuit above, didn't you? (Albeit you report getting 7% THD, which is more than you want for the project.) || So the question cannot be the one in the title of "can the circuit be built {with} real parts" - you already know that, since you've done it. Yes? Therefore can you please update the question text & title to clarify exactly what the question is and what help you are asking for? TY

@SamGibson thank you for you referencing apologies for not paying attention to that. I’ve had made some changes to the circuit and manage to get the THD lower to the point where I’m at that point to start building and my supervisor has confirmed the go sign. I just want other peoples opinions to see if this is possible.

And I’ve simulated the circuit above and not built it. With my own edits of course to lower the THD to the point the where the quiescent current is not too high that it causes heat dissipation and thermal instability.

AHX123 - (a) In chat, you seemed to imply that you had built the circuit (at least I didn't see the word "simulated"). Thanks for explaining it has only been simulated. (b) Please avoid asking for opinions. This site is not a forum and should not encourage discussions in questions (that's why comments on your last question were moved to chat). (c) Also see this recent meta discussion where I've pointed out that asking for a general design review may not be well-received. It really should be asking about specific points of concern. TY

(continued) You've just commented that your design made edits to the circuit suggested by periblepsis - but the circuit in the question is a copy of his design, isn't it? So if you've changed the design, shouldn't you put your design in the question too? Otherwise any responses you get will relate to the circuit in the question, not your one with changes. || Or, if you want to ask about his original design, don't confuse readers by saying that you changed the design - or you'll get responses like mine asking where the changed design is.

I would have but due to some personal issues I don’t have access to my multisim as of right now. So I can’t reach the file that I have with the edits. But I agree with you

AHX123 - OK, I'm stopping here. I hope you can understand why I don't want to get involved analysing a circuit, only to find later that it was a waste of time as the real circuit (after your changes) was different. The situation is too unclear for me, but I wish you sincere good luck with the project.

Hi would it be okay if I deleted the question. I want to ask before risking the getting a block from asking. You are right the question is too unclear

@AHX123 Hi - Re deleting the question - by the time you posted this, it was already too late for you to be able to do that, as the answer by Transistor was already upvoted (you can only delete either an unanswered question, or one which has been answered but none have been upvoted). || I think the least-bad approach would be for you to accept the answer by Transistor (since it was given in good faith, as an attempt to answer what they saw as the question).

Accepting that answer will indicate that you don't need further answers. It doesn't guarantee that you won't get downvotes, but it usually reduces the chance of that.

That design kindly provided by periblepsis on your previous question, is complex when you get down to the details and tuning. That guy is an exceptional (and modest) engineer. But even though he can understand its theory of operation, that doesn't mean it's easy for someone else to do so, starting from scratch.

As I linked, someone else recently asked on our meta site about whether design review questions were on-topic. Previous guidance was that broad "please review the whole thing"-type questions will probably not be well-received, and IMHO that's still true.

My personal opinion is (similar to what Transistor said) trying to go from not designing a class AB amplifier, to one as complex as what you're trying, in one go, likely requires too much to be explained - or else lots of interactive mentoring. You got some of that from periblepsis in chat, but that level of mentoring is the exception, not the rule.

I have to go now - I may pop back later, but I've done my best to answer what you asked here. Bye for now :)

Thank you for your time I’ll take into account what you have said - Bye :)

That basic circuit looks reasonable. I would like to point out something that your circuit simulator doesn't do well - power dissipation in transistors. Q1, Q2 are rather puny when you try to drive current into a loudspeaker load. However with no load, they shouldn't run hot. I'd look for transistors that can be attached to a heat-sink.