ieales
Responses from ieales
| Let me end the Premp/Amplifier sound debate ... Another seldom checked SS / tube difference is DC offset. A tube amp w OPT has none and an SS amp likely has some. DC is a voice coil heater. When voice coils heat, their resistance changes. Resistance changes cause corner frequency changes with p... | |
| Let me end the Premp/Amplifier sound debate ... And I further disagree as I have the NIOSH app on my iPad No mention of calibrated microphone or calibration standard. Both are necessary. I trust Bob Carver about as much as a preacher. Carver made the claim, the Doubting Thomases verif... | |
| Subwoofer between speakers? 32 foot organ pipe is 16.4Hz The head displacement 'whhomph' on a kick drum is about ½Hz in a rock band. Harp, contrabassoon, piano about 28Hz Tuba about 30Hz Large spaces have sub harmonics. Reproducing them transports one to the venue. Sorr... | |
| Let me end the Premp/Amplifier sound debate ... "The Final Achievement After this last bit of tweaking, where Bob was able to reinstate his 70dB null while driving a very difficult load, we now had what sounded like two absolutely identical amplifiers." [emphasis added] If one amp was maki... | |
| Let me end the Premp/Amplifier sound debate ... The difference you hear isn't on account of power! Yes it is. It's not that the distortion signature is too small, it's that no one measures it. No SPL meter is going to be better than ±0.1db @ 85dB. It likely has a nonlinear response. In abso... | |
| Subwoofer between speakers? @whitefishpoint1175 I have no subwoofers at all. Well treated room with outstanding setup, no need. Tried them and sold them….. Not all subs are created equal and not all can correctly integrate. Unless you have speakers that can get to 30Hz ... | |
| Let me end the Premp/Amplifier sound debate ... @holmz If a single frequency SPL is measured with the same terminal voltage, that SPL should be the same for any amp. Since almost agree that tubes sound different than solid state, then what makes up the ’voltage’ must vary. So if you measure 1... | |
| Let me end the Premp/Amplifier sound debate ... Music is a sequence of fundamentals rich in harmonics. The ear brain can definitely tell when the harmonics are shifted. OTL - Output TransformerLESS - is off topic. The images are for "tube amplifier output transformer". Let’s take it as writte... | |
| Let me end the Premp/Amplifier sound debate ... Maybe I am simple fellow… but how can the sound (SPL) be the same, if the current (and voltage) are not the same? There’s much more to sound than SPL. Mostly, the measurements quoted in HiFi are THD and IM @ a power level. Occasionally, a squ... | |
| Let me end the Premp/Amplifier sound debate ... Have you looked? For decades... Most tube amp manufacturers these days seem to eschew lots of feedback. FWIW, I've never measured a tube amp output voltage into a loudspeaker that was anywhere close to what an SS amp delivered into the same l... | |
| Let me end the Premp/Amplifier sound debate ... Ended on the opening post... | |
| Let me end the Premp/Amplifier sound debate ... BTW, my videos were all made using a Nikon D750 SLR. 😴😴😴😴😴😴😴 | |
| Let me end the Premp/Amplifier sound debate ... This statement is incorrect. This amp uses about 15 dB of feedback, allowing it to behave as a voltage source with most speakers. Most Speakers vary immensely. 😉 To date, I've yet to see a tube amp measurement that does not look similar to th... | |
| Let me end the Premp/Amplifier sound debate ... Voltage from a tube amplifier OPT will vary considerably depending on the speaker impedance at the test frequency. The ENTIRE UBoob demo idea is nonsense from the git-go | |
| Let me end the Premp/Amplifier sound debate ... UBoob compresses audio. UTTER waste of time! |