Search results

My view is different from the established view. I have the impression that imaging is definitely better when both drivers are in phase and when there is less phase shift over the audible frequency band. I've designed a two way speaker with a 2.3Khz crossover where they both are in phase and over...

Your're uninformed - it is digital by virtue of being a switching amplifier. https://en.wikipedia.org/wiki/Class-D_amplifier The filter is not sufficient to supress the RF.

60 years ago I was informed by a well informed source that 2% harmonic distortion of 30Hz, being 60Hz, sounds louder than the fundamental 30Hz. No wonder that there seems to be no audible difference since all are hearing the harmonics and not the fundamental bass. There have been speakers...

Because digital amplifiers leak considerable amount of low frequency RF which affect the T-cell bloodcounts in your blood potentially leading to leukemia. Us, old HAM operators, know to stay out of RF fields. No guessing how I know.

That's not a bi-polar designed for crossover purposes.

Tube amplifier do sound different from each other. This is due to the different implementations (or not) of global negative feedback and the amount of damping factor. Speakers react differently to different damping factors and some are a better match than others. Solid state normally has a very...

Update: I've solved the problem by adding a fraction of global negative feedback (-2.5dB). Resorted to this to reduce the phase shift at the lowest frequencies which potentially can result in instability with a reactive load. The value of the coupling capacitor no longer is critical and has...

The primary of the output transformer is 18H with a DC resistance of 101 Ohm and a reflected load impedance of 3500 Ohm. When modelled it shows a phase shift between input on g1 / cathode and secondary at 50Hz. But at 400Hz that has largely disappeared. Due to using UL and cathode feedback the...

Thanks, it explains the why. It leaves open the question what is more objectionable (audible): The increased distortion or the increased phase shift in the bass region. Simulation indicated about 1dB drop in output. I'm using UL and cathode feedback and as a result the inductance of the...

Perhaps some of the more knowledgeable persons are able to provide an answer (or some insight) for me. Using LtSpice I am modelling a single ended tube amplifier using UL and CFB using only local feedback in the output stage. All is fine, I get at 400Hz 0.65% distortion at onset of grid...

Tubes having the same designation are supposedly the same. Unfrortunately this is not the case as different manufacturers, and even the same manufacturer, may construct the tube totally different. This results in different optimum operating points. And if you use a tube outside its optimum...

I have been reading elsewhere that the generic ASIO4ALLis did not perform as good as an ASIO that was provided by the manufacturer. In other words: There was a marked difference in performance and the recommendation was to stay away from the ASIO4ALL. Cannot exactly remember the old saying from...

Lifespan is determined by a number of factors. It depends on the temperature of the equipment (capacitor), the applied voltage and the amount of ripple current. I have capacitors rated for 8000 hours in a tube amplifier's PSU and when I worked it out they would survive at least 260 000 hours...

Proac Tablette 10 perhaps?