Which Tannoys, folks?

[realysm42]

Apologies mate.

The actual thread's provided some intersting reading and I'm interested to hear of your findings.

[Marco]

Jeez - Dunn still hasn't got the grace to admit defeat!

Here's his latest bull:

From AnthonyTD

"Marco's amplifier produces its full stated power of 50 watts per Chanel whilst staying in its Class A region (my hi-light).
I really, really hope he gets this now and leaves me out of any further debates or silly games he may have planned for Marco, lets hope.
Anthony,TD..."

Now we are getting to the truth of the matter, this is another ploy of the push-pull so called class A amp manufacturers - only claim the spec of the amp to the point that it *should* never come out of class A. Well as he perfectly well knows this depends on load and I could definitely put a load on the amp that would make it revert to class B, and I am sure the way Marco uses his amp to try and impress people by pinning them to the back wall (soft clipping), at that point it has reverted to class B - so ergo it is a class AB amplifier.

Perhaps if I thrashed the amplifier to within an inch of its life all of the time, then what Mr Dunn is saying would be correct. Also, is he talking about an electrical load or a musical load, in reference to his assertion that he could revert my amp to Class B? If it's simply the former, then that has no relevance when someone is listening to music in 'real world' conditions. If it's the latter, then I'd love to be informed of (and hear) the piece of music concerned, as I'd use it as part of my listening test procedures in future!

The fact is, however, even when I play the amp very loudly, when people are round for a sesh (as all of us here do who actually have friends and aren't too old to enjoy loud rock music ), the Copper amp is still operating well within its Class A power envelope, as you only need a few watts (and the few watts required for that task are unquestionably, and measurably, in Class A, as has been demonstrated already by Anthony and Nick), when the amp is operating within that zone, to create very loud SPLs (in a controlled and musical way), when using 95db efficient 15" drivers, in huge cabinets, playing music in my relatively small room.

Therefore, given that's case, I'm 100% happy (and as it's my amp being discussed, that's all that matters) that, during 90% of my music listening, which is done at normal levels, the Copper amp is operating well within its Class A power envelope; ergo when used thus, it is a true 50W Class A push-pull valve amplifier.

One further point, regarding this from RD: "Marco's so called class A push pull amp reverts to class B somewhere in its gain range depending on load...."

Possibly, although due to your lack of knowledge of how my amp has been designed (as has been evidenced before with your errors, regarding wiring looms, etc), and valve design topology in general, you can only surmise when, or indeed if that happens, when the amp is being used well within its performance limits, which is 90% of the time (as it doesn’t get thrashed often)!

You haven't measured or even listened to my amp under ANY conditions. Therefore, rather than being factual, your assertions, in that respect, are thus no more than conjecture.


*That* is the crux of the matter in this ridiculous dispute, so Mr Dunn can bleat away to the contrary on his toy forum, making himself in the process look like a dickhead to those with any proper understanding of electronics, and with everyone but him safe in the knowledge that he's been hoisted (rather hilariously) by his own petard!

Now, as Anthony and Nick, two highly respected audio engineers, have very eloquently stated the undisputable facts of the matter, I must apologise sincerely to Paul for messing up his thread, and ask that we all (including me), depart from the dispute about Class A and finally get the thread back on topic

Marco.

[anthonyTD]

I know I'm walking into a long standing thing here but what's the issue; even if Marco were wrong (and I'm not intimating he is, I don't understand all of the technical stuff but even a fool can tell all the techy people are agreed) why can't the other guy just laugh about it and move on?

Hi Martin,
Unfortunetly Its a long standing obsession RD has with AOS, and Marco in paticular, As this is Paul's thread originaly about his adventure's into Tannoy dual concentrics, i would ask that Marco moves all comments on the subject of RD to the dedicated thread started.
A...

[Marco]

If Paul would like that, then I will most certainly oblige. However, it might make the other thread difficult to read in its proper context.

Therefore, I'll leave it up to Paul. If he's fine with leaving the last few posts about Class A 'as is', with the promise that there will be no more 'unwanted interruptions', then that's fine, but if not, the OT stuff will be moved to the other thread.

Paul, just let me know what you're happy with

Marco.

[Reffc]

Happy top leave the comments as they stand as Marco suggests. Just trying to keep a semblance of the original thread intact

[anthonyTD]

Happy top leave the comments as they stand as Marco suggests. Just trying to keep a semblance of the original thread intact

[Marco]

Happy top leave the comments as they stand as Marco suggests. Just trying to keep a semblance of the original thread intact

Nice one, mate. The ridiculous dispute is over, as far as I'm concerned, so I'm off to listen to music on my 'kid-on' Class A P/P valve amp, and he (Dunn) can do the same on his Class AB/B/C/CBA/FUK, or whatever his idiocy that day, deems it to be, amp!

Marco.

[Marco]

Retrieved from earlier:

Hi Marco,

they'll need 50 to 100 hours to bed in but after that if you'd like to bring your amp, then you'd be welcome to come and listen. Of course, it's all dependant upon the Harbeths being sold first!

Top man. I'll defo take you up on that!

Marco.

[Reffc]

The new Tannoy stands should be ready around about the same time but for now am keeping the details under wraps

My guess is that the largest market for those would be the Far East.

[lewis]

The new Tannoy stands should be ready around about the same time but for now am keeping the details under wraps

My guess is that the largest market for those would be the Far East.

And one here in the west midlands

Here's hoping the price isn't too

Oh, and don't forget my AOS discount!