audio-talk

Thats awfully close to QUADs straight wire with gain...

But I guess we all go for closest approach to the original sound

I would say that breakup is not the only thing to listen for... I would listen for relative level changes and timbre changes through the overlapping region relative to each side of the overlapping region using male voice, female voice, solo grand piano and solo cello But really if you are happy with...

Nick said Yes, I would expect that. You are taking a signal that is mostly a sine wave with some harmonics, passing that through an amplifier that generates a set of distortion harmonics from that signal where the odd ones will dominate. You then add those new harmonics to the original signal and th...

Interesting challenge :-) There are some interesting examples of slot loaded woofers / subwoofers in the diy community some worth checking out are j-c morrisons: https://www.labjc.com/?p=4230 https://www.labjc.com/?p=4471 and XRK971 dipole https://www.diyaudio.com/community/threads/the-xsd-speaker.3...

Oh quick observation on the trumpet... The distortion level orcrather distortiion profile various with how strongly it is blown assuming the 'tonguing' doesn't chsnge...so power through the instrument rather than percieved volume. ..

I need to think on what you said and the possible rabbit holes but I agree that we fundamentally agree but express it differently. Thats part of what I enjoy in these discussions as it good to get that different perspective...

Running out of energy so I need to stop for a while...sorry

James

I've measured PP amps reducing the even harmonics of a mudic signal by comparing FFTs of a single note produced by an oboe... I tried six different amps and the 5 PP amps all reduced the second and fourth harmonic whilst the se amp increased them

Interesting question and equally is a sine wave with a dc offset symmetrical? I guess the definition depends on who does it and whst assumptions you wish to make... Fir a dc amplifier a sawtooth could be symmetrical but the sine with a dc offset wouldn't be. For an ac coupled amplifier both could be...

I suppose generically we would call them effects boxes :-) Not that I agree that all single ended amplifiers treat symmetric and asymmetric signals differently but certainly some ( alright - a lot) do... On the other hand PP amplifiers are inherently inaccurate in that they don't treat even and odd ...

It is a fallacy that an asymmetric waveform always produces a partial dc offset - what ever the partial means in that context. A symmetrical waveform or an asymmetric waveform can produce a dc offset it all depends on how the waveform sits relative to the long term average excursion value for the wa...

Thats true and its good marketing copy as its a distinct story rathercthan a rehash of the usual stuff. With regard to lobing the circular array has its own lobing pattern across its full frequency range and throughout the crossover region to the tweeter as does the woofer to circular array but in t...

Other than as marketing bull... where is the innovation? Everything in the design illustrations has been used before... for instance I did a circular array of small wide band drivers a few years ago based on older circular arrays for speakers and for radar arrays (same theory) and front to front mou...

Indeed! Completely agree that the asymmetric, symmetric signal argument is irrelevant - music signals are often asymmetric (more often than not) and by the arguments logic we would not hear them in PP amps when they are... Its often overlooked that all components, moment by moment, react to what com...

Nick, Am I right in thinking that the output device in the PP OPT case is the output transformer and not the active devices i.e. valves themselves. ...And in a OTL or conventional solid state PP device the cancellation takes place in the load - again not in the active device. ...And all of this is c...

Sorry for the delayed response - I had a long sleep this afternoon - still no energy or stamina... My take on Steve's response - with apologises for repetition of what others have said: 1) if we consider a triode (internal resistance ra) sitting on a cathode resistor (Rk) and with an anode resistor ...