Silk Audio
23-Step Supermalloy Transformer Volume Control



Silk Audio 23 step Transformer Volume Control, Supermalloy SQ annealed core, high purity silver plated/Teflon lead out wires, beautiful stainless 5x7cm can with mounting brackets.

NEW! Premium core offers +40% increase in permeability with even lower hysteresis.. The new core has almost double the permeability ! The new SILK Supermalloy products have the highest inductance, highest Q factor and lowest hysteresis. Transfer of signal energy
(even minute details) is improved to new level. Bass to rock the foundations: at 20Hz. The new TVC has an inductance between around 1100 to 1200 Henry. The quality difference between this and normal Permalloy is huge!






Silk Audio 23-step TVC
(without the switch in the photo)



€ 351.25
ex.VAT
€ 425.00
incl.VAT
set of 2 pcs.






Silk Audio Supermalloy Transformer Attenuator

We are exciting to announce the availability of the new SILK Transformer Volume Control STA-522A. This new attenuator extends the sound performance of its very successful predecessor by adopting the newest development of Supermalloy core with even higher permeability and lower loss. Winding scheme and implementation are improved to increase linearity, frequency response and boost the working level up to +8Vrms.

The former/old STA-522 did already established the highest quality Supermalloy transformer with 22 carefully selected steps in the secondary winding to function as an stepped attenuator with very high inductance (in excess of 450 Henry or equivalent to 50Kohm) with very low loss winding technique (called Nano winding technology). The primary coils are made such that it can be connected to generate +0dB or +6dB which acts like a step up transformer in a system where load input sensitivity is low (= high input impedance).

The new STA-522A retains all these features and further boost the total primary inductance up to +1100 Henry !!! Without a doubt the new SILK STA-522A offers the highest value, sound and joy for the most serious audiophiles.

 

It can be clearly seen in the above plot of the frequency response characteristic of the new STA-522A, that the nasty peak/dip usually associated with regular transformer based attenuate has been eliminated. From 10Hz to 35,000Hz the frequency response is only -1dB deviation from the 1KHz reference point. Source impedance is 12K ohm, load impedance is 10K ohm. Series primary connection.



The improved winding scheme of the new STA-522A brings a very smooth phase response plot. Superior phase behavior is ensured throughout audio spectrum.
Out of phase will not happen near or close to audio spectrum.





After extensive experiments, we finally found new ways to create a super inductor
(in excess of 1100 Henry) with perfect waveform. The actual screen shot of a 10KHz square wave response at high voltage level (11.3V peak to peak) Series primary connection (1:1), 12K ohm source impedance, 10K load


Step

0 dB attenuation
+6dB attenuation
1
mute
mute
2
-48
-42
3
-44
-38
4
-40
-34
5
-38
-32
6
-36
-30
7
-34
-28
8
-32
-26
9
-30
-24
10
-28
-22
11
-26
-20
12
-24
-28
13
-22
-16
14
-20
-14
15
-28
-12
16
-16
-10
17
-14
-8
18
-12
-6
19
-10
-4
20
-8
-2
21
-6
0
22
-3
+3
23
0
+6