SKU: 61749958926

Ypsilon PST100 TA Transformer Attenuator Preamplifier

Sale price$29250.00 Regular price$32500.00
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Description

Ypsilon PST100 TA Transformer Attenuator PreamplifierYpsilon PST 100 Mk2 TA Stereo Transformer Attenuator Preamplifier The PST100 approaches the concept of pre amplification in an outstanding way. At its heart are the in house made transformers used for attenuation. In addition, its valve state circuit combined with exquisite materials produce the finest and most elegant sound that any pre amplifier could ever achieve. Conventional wisdom suggests that the most critical part of a pre amplifier is the

Ypsilon PST-100 Mk2 TA

Stereo Transformer Attenuator Preamplifier

The PST–100 approaches the concept of pre-amplification in an outstanding way. At its heart are the in-house made transformers used for attenuation. In addition, its valve state circuit combined with exquisite materials produce the finest and most elegant sound that any pre-amplifier could ever achieve.

Conventional wisdom suggests that the most critical part of a pre-amplifier is the active circuit design. However, Ypsilon believe that the means of signal attenuation (the volume control) is the most critical to the overall sound of a preamplifier. Most designers use resistor attenuators for volume control. Ypsilon have used resistor attenuators with high quality resistors (eg. Vishay) in the past but felt unsatisfied with the character they induced in the signal. Ypsilon developed a very special transformer as the means of attenuation, using special winding techniques and highest quality wires and cores. Its performance surpassed that of the best resistor attenuators. In a transformer the magnetic circuit can be ultra linear when the very best core materials are used. The sound of such materials is much more musical and detailed compared with the best resistors. A transformer attenuator with 31 taps is used in the PST100 mk2 providing a total attenuation of 54db in its lowest tap.

The active gain stage is a no feedback S.E. C3M triode, transformer coupled. The power supply uses valve rectification (using the 6CA4) and choke filter. Wiring is point to point with custom made pure silver wire. The transformer attenuator is placed after the valve stage, preserving the purity and micro details of the signal. The gain is 16db. Output impedance is 150 Ω max.

PST 100 Mk2 TA is also available without the valve stage for systems that don’t require additional gain. This version is equipped with the transformer attenuators and is called PST 100 TA. Please note that it is fully upgradeable to the full version at any time by returning to factory.

The PST 100 mk2 represents the pinnacle in preamplification and is an essential component if you are building a ‘no-holds-barred’ system.

Reviews

Stereophile, Michael Fremer, 2014

For now, the Ypsilon PST-100 Mk.II is the most transparent and, therefore, the most perfect audio component I have ever heard—or not heard.

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Positive Feedback, Marshall Nack, 2014

Here’s the scoop: For those who are looking for a little bit of creature friendliness served up along with excellent grades on the audio scorecard, you’d be hard pressed to find better than the PST 100 Mk II at any price.

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Dagogo, Ed Momkus, 2009

there is no disputing the fact that this is a preamp that stands at the pinnacle of sonic splendor.

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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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SKU: 61749958926

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4.1 ★★★★★
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C
Verified Purchase
Courtney
Phoenix, US
★★★★★ 5
Dog toy
Color: Blue
Great toy for tough chewers
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
J
Verified Purchase
jennifer langan
Boise, US
★★★★★ 1
Smells like chemicals
Color: Blue
Good quality toy but it had a chemical smell. even after washing it my dog wouldn't play with it. Not recommended
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
F
Verified Purchase
Flash gordon
Belleville, US
★★★★★ 5
Durable
Color: Yellow
So far my huge pit mix breed likes this to a lot and I’m surprised that he hasn’t been able to chew it up little bit of pb inside it and he’s focused for a good 20 minutes it almost fits on his foot too
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Reviewed in the United States on February 5, 2026
A
Verified Purchase
Ask Angie
Battle Creek, US
★★★★★ 5
Cute chew toy for smaller dogs!
Color: Red, Color: Red
Soooo my new puppy Dottie was continually eating my favorite pair of crocs by sneaking into my closet. To solve this issue I thought I would buy her her own chewy croc and actually found one on Amazon! lol The chew toy is actually heavy and weighted and the material is hard enough for an effective teething toy but soft enough for the puppy to play with! My little Weeney dog loved it the second I took it out of the package! The fake croc chew toy is a very cute design with a fun, bright color. The chew toy material is constructed of durable rubber and will last a long time. I didn't like that it doesn't make noise and is small.. I believe it is better suited for smaller breads to use which was perfect for my puppies needs.
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Reviewed in the United States on September 24, 2025
J
Verified Purchase
JSpears
Draper, US
★★★★★ 5
You should have one on standby.
Color: Yellow, Color: Yellow
This product was great for my teething Bully puppy, she, is an aggressive chewer. It gave her relief and kept her busy. In the 6 or 7 weeks that we've had it, it stood the test of time. She would chew 10 or 15 minutes at a time and nap from exhaustion. Overall, several hours of chewing. I must say this toy is not indestructable. In the end it was necessary to remove it and substitute another toy. The bully on the picture looks like a twin of my own pup. I did remove loose slivers and pieces that could be chewed off immediately. I am attaching a pic of the pre-disposal remnants for clarity. This is a tough toy but again, not indestructible.
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Reviewed in the United States on September 8, 2025

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