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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: RE: You live in the dark ages ......Think like a caveman, posted by cpotl on January 12, 2015 at 18:07:53:
The stiffer a power supply is--- that is, the less it current-starves the amp stage it is powering, the better it will follow the "groove" of the music. It is IMPOSSIBLE, therefore, to follow the music's groove with a power supply that fluctuates (sags) enough to momentarily current-starve any amp stage that it is powering.Current starvation can come from several sources:
(1) Capacitors that store too much energy and release it too slowly. The cap's re-charge cycle takes current away from what is to be powered, and the release cycle of a large cap simply doesn't even get started (release isn't fast enough) until the musical transient has come and gone.
(2) Current starvation can come from a power transformer that's operated too close to its rating. Run about 30% of the rating, or less.
(3) Current starvation can come from too much stored inductance in chokes-- as in capacitors-- energy charge-up hogs current away from the device to be powered and energy release is delayed for too long.
(4) Current starvation can come from unnecessarily high resistances in the wrong places. These can be high-DCR chokes (anything over 20 ohms in most cases in tube amp power supplies).
(5) Current starvation can come from attaching devices onto the plate or cathode of a tube, in the attempt to correct for a sagging power supply. Examples of this include CCS devices, SRPP, etc., and several more.
(6) If a current-starving (under powered, or slow due to large capacitors, high value chokes, etc.) power supply is being operated, use of these (above) correction devices will usually improve bass performance at the expense of causing some current starvation of High notes that are extended and extremely dynamic, such as repeated cymbal clashes-- something very few amps ever get right-- so no one should feel bad if he's never heard an amplifier do it right. The use of these add-on devices nearly always also cause slight-- or sometimes worse-- degradation of signal purity, similar to a Tetrode or a Pentode VS a true triode-- that is-- slight signal homogenization and slight (or worse) image smearing.
The above effects (defects, actually) are euphonic and pleasing to many listeners because by homogenizing some signal information together, they more fully "flesh-out" the music-- it sounds solider and fuller than it actually is. This problem largely disappears with the use of medium or lower-efficiency speakers (usually under 96 db/watt) simply because those speakers can't reproduce it, but becomes apparent as an unwanted musical distortion when powering High-EFF, speakers that have large radiating surface areas, and have cables/wiring that is clean, efficient, and wideband.
The above are observed results and are not a set of personal opinions.
---Dennis---
Edits: 01/13/15 01/13/15
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Follow Ups
- RE: You live in the dark ages ......Think like a caveman, - tube wrangler 20:39:52 01/13/15 (7)
- RE: You live in the dark ages ......Think like a caveman, - kyle 04:52:02 01/14/15 (1)
- RE: You live in the dark ages ......Think like a caveman, - tube wrangler 16:57:22 01/14/15 (0)
- RE: You live in the dark ages ......Think like a caveman, - cpotl 22:08:12 01/13/15 (4)
- RE: You live in the dark ages ......Think like a caveman, - tube wrangler 17:49:46 01/14/15 (3)
- RE: You live in the dark ages ......Think like a caveman, - GEO 04:40:59 01/15/15 (0)
- RE: You live in the dark ages ......Think like a caveman, - LinuxGuru 23:27:32 01/14/15 (0)
- RE: You live in the dark ages ......Think like a caveman, - cpotl 19:50:20 01/14/15 (0)
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