Slewmaster - CFA vs. VFA "Rumble"

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#10,002
That was my design. The basic idea comes from Crest Audio. Unfortunately never built...

Sajti
 

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#10,003
LineSource said:
OS....how about a Thread Re-Boot for POST 10,000. Do you have any ideas?
like... "It's all about the sound quality you experience in your room"

BEST SOUND WHEN: Each speaker has its own room-optimized crossover and load-optimized amplifier. So, put an active crossover for each amp channel into the amplifier chassis.

---New PCB and packaging design ideas optimzed for combining digital/analog active crossovers along with multiple amplifiers of different power and design into one chassis.
---Shared power supply and protection = common standards
---Output PCBs which can be easly converted for 1 full set or 2 partial sets of output transistors
---Diverse circuit driver PCBs which can be mounted on top of common output PCB. full or partial output set.
Click to expand...


Beyond that = "Save the planet one amp at a time" More like - class D for
bass , class G for 100hz-20khz. SMPS to power them all.


While still retaining analog fidelity , BTW.

Edit - good idea. Bi-amping with class G +SMPS will be a new thread.
OS
 
#10,004
ostripper said:
"Save the planet one amp at a time"
More like - class D for bass , class G for 100hz-20khz. SMPS to power them all. OS
Click to expand...
Is there an accepted "amplifier efficiency vs. THD" grading system?

"Save the planet one amp at a time"
"Save the planet one horn speaker at a time"

For my home speakers, the woofers consume over 85% of the power.
==========
"It's all about the sound quality you experience in your room"

BEST SOUND WHEN: Each speaker has its own room-optimized crossover, and load-optimized amplifier selected for efficiency vs. THD.

Reference Candidate:
1) "Barney Oliver 26mv" Class_A/B bias point for the high power demand woofer amplifier.
2) Use Class_A Plateau Bias for the modest power demand midrange and tweeter amplifiers.
3) Share one large distributed capacitance analog power supply to reduce diode + resistance drops.

For Class_A/B amplifier circuits, there are a couple of clever, proven, efficient sliding bias schemes which could be revisited, analyzed, and updated. I've been using a Plateau Bias scheme which idles with a few watts of Class-A bias power/heat, and quickly selects a higher bias point to maintain Class_A for a modest period until a lower Class_A bias plateau can be used. None of the sonic artifacts of a fully dynamic sliding bias.
 
#10,005
As you stated Osipper, became the receiver. Philosophy of wolferine aka boy who cried wolf. As you probably already know what is the best way to ruin a kalman filter. Recycle, bicycle, as causality.
The Precycle followed by prediction not to have a long offcycle could been probably prevented by assuming to feed right values in simulator.
So what is the moral of the story, I leave it to you
 
#10,007
All the transistors are still available from Mouser for the Kypton-ND. Ostripper just used the LT1022 for simulation purposes. TL072 is the normal op amp of choice for Slewmaster servos.

512-KSA1381ESTU
512-KSC3503DSTU
512-BC560CTA
512-BC550CTA
512-KSA992FTA
512-KSC1845FTA
595-TL072CP
 
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