Amta-Sphere

Atma-Sphere music systems, inc. is a small company in Saint Paul, MN that has been making world-class vacuum tube music amplifiers since 1976. We are known for our unique approach to circuit design, resulting in multiple patents and the creation of the first, truly reliable Output TransformerLess (OTL) amplifiers.

Atma-Sphere S-30 Mk III.1

Atma-Sphere S-30 MK III.1 Stereo OTL Amplifier – $3,990. Good OTL amps are just expensive to make… complexity from the power supply to the number of tubes requires drives up cost, but Ralph Karsten at Atma-Sphere has put together a great sounding hand-wired 30W/Ch OTL that cut no corners in a category where such (OTL) amps cost much more.The fully balanced, very stable & reliable design delivers the purity of tube tone that no other type of amplifier can. Click here to view manufacturer web page for the S-30 MKIII.1.

Optional Features:

Power Supply Boost option: $400
V-Cap Teflon® coupling caps: $500
V-Cap Copper Foil Teflon® coupling caps: $600
Caddock® resistor package: $1270

Amplifier

Signature Sound High-End Audio

3 weeks ago

A special deal here for our FB followers ... this is a new item returned by a customer as he decided to go another (more expensive) power cord route from us. So, I have this one JPS Labs Power AC Black (2.0m/6ft), brand new for sale at a special price (which I will not post here!). This a $995 MSRP power cod (again, brand new! - only taken out of the box to snap these pics), if you are interested please call, e-mail, or message us for your price! The Power AC Black is a outstanding cord for use with power amplifiers or on power conditioners. ... See MoreSee Less

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😮

Signature Sound High-End Audio is at Signature Sound High-End Audio.

4 weeks ago

Coming soon. . . ... See MoreSee Less

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Signature Sound High-End Audio added 3 new photos — at Signature Sound High-End Audio.

2 months ago

They are alive! Starting off as bare shells, these Merlin VSMs have been rebuilt using (almost) all new parts, to Merlin's last/best Black Magic Edition specs. ... See MoreSee Less

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Got to get my pair done!

Bobby would have approved.

Are they for sale Rich?

Wells amp 👌

Signature Sound High-End Audio

2 months ago

Very nice used Filarmonia SE for sale here (from a fellow customer/Merlin owner). I recently had it here for a minor repair (a failing/poor solder connection - while I had it here, I also did the factory spec'd updates for the SE series amps) last month and can attest that the unit is in excellent cosmetic condition and working order, especially considering it's age (11 years). The seller is planing on replacing it with a new Filarmonia in the near future. ... See MoreSee Less

Ars-Sonum Filarmonia SE

usaudiomart.com

This Filarmonia SE serial # 1126 is in outstanding condition with very little use . Serviced by Rich Brkich of Signature Sound along with upgrades and full inspection. Estimated by Rich to have less t...

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Damn, it looks just like a cardboard box! 🤔 🤔

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