and your personal conclusions about it ?
I like it
and your personal conclusions about it ?
It is completely stable to any load you may imagine. No feedback power amplifier I have ever built was as stable as this one. Attached is step response to 6.8ohm + 1uF in parallel. Noise is not very low because of input MOSFETs, but they are operated at quite high idle current. S/N = -86dB/2.83Vrms unweighted, over 20Hz - 20kHz bandwidth. The noise bottom is similar to 1/f.
Zeus amplifiers & Jordan JX92's
My understanding thus far is that one has to choose between these two option
Happy to be corrected if my thinking is erroneous
Your Perception is your reality , if you think it sounds bad then It is, no instructions necessary ..
It is necessary to understand the various kinds of badness, as of to understand where they come from. One may put the blame on the bad recording on defense of his transparent system.
A transparent system often has an 'edge' added to it from higher order distortion, etc. This is one of the trade-offs in amplifier design. Sometimes, having a lot of low order IM and harmonic distortion gives a forgiving 'veil' over the higher order products.
But how can a transparent system sound bad UNLESS it is a bad recording?
Yes Jay, but if one has a transparent system that can handle very well one classical recording with lots of very fine detail and ambiance etc, it is not fair to assume when one plays another classical recording where the fine detail and ambiance and been degraded into a mushy, rough, burbling mess that it's probably not the system that is to blame ?
Charles has moved on to proprietary current mirror technology instead of cascode
Simple logic is like this:
1) Single driver will not give top level transparency, so we use crossover technology, which gives evils as compromise. But every ones system has different amount of evil.
2) Rigid cone is necessary for top level transparency, or ideal pistonic behavior, but it gives compromise at many areas.
3) You want a flat response at crossover frequency? You can opt for LR4, but watch out for 360 deg phase lag. You want less phase lag? LR2 will do it but 3dB bump will not give accurate sound, and so absolute phase issue. You want perfect transient? You may get it but compromise is at off axis listening.
Many things can be said. Thinking that one's system is perfect, is blind.
Simple logic is like this:
You can opt for LR4, but watch out for 360 deg phase lag. You want less phase lag? LR2 will do it but 3dB bump will not give accurate sound, and so absolute phase issue.
It is possible to get both transparent and pleasing, though it needs some effort .