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

posted 5 days ago

Ryan Speakers LLC knocking it out of the park with their new speakers at the LA Audio Show! :-)

Tom Norton of Sound & Vision stops by to hear the preview of the S840's at the LA Audio Show.

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Signature Sound High-End Audio

posted 1 day ago

Here is in of our best demo values currently available.... This Gloss White Rega Research RP6 ($1,495 msrp) demo is in excellent condition with factory box, manual and warranty. It comes with our demo Dynavector 20X2-L low output moving coil cartridge ($995 msrp) with less than 100 hours of use which is mounted with correct Rega machined aluminum VTA spacer ($39) on the Rega RB303 arm. The table comes with the factory counterweight AND (as shown) the ISOKinetik ISOWeight ($65 from the UK). As a EXTRA bonus, we are including a Herbies Audio Lab Way Excellent TT Mat ($60). This is a fantastic sounding turnkey turntable set-up worth $2,650 new. All items listed (as you see it pictured here) for just $1,750. Feel free to call, e-mail, or message us with any questions about this demo offering or your request to purchase!

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Signature Sound High-End Audio

posted 2 weeks ago

So, if you are looking for something better than our demo Planar 2 I listed for sale in a other post, how about a very minty, low hours demo (with full warranty) new version Rega Planar 3 with factory mounted Elys2 phono cartridge sound??? :-) This one year old demo is in excellent condition, complete with all factory packaging. As a special bonus it will come packaged with a new leather turntable mat from HideInTheSound (a $33 value). Retail new about a $1,190 value, yours for only $750!

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Signature Sound High-End Audio

posted 1 week ago

I have a really sweet demo Rega turntable package here (would make a great fathers day present!). This is our (very low hour ex condition) Demo Rega New Planar 2 with Rega Performance Pack Upgrade set-up in gloss white finish. Table comes complete with the original (brand new never used) Rega Carbon cartridge ( so, you have a good back-up/spare cartridge) and std felt mat PLUS with the Rega Bias2 cartridge (installed and aligned), and upgraded Rega Reference Belt, standard belt, and wool mat. Complete with all original factory packaging and Rega Warranty! New, the Planar 2 ($695) and the Performance Pack ($195) are $890, this demo deal is your for $575!

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Signature Sound High-End Audio

posted 2 weeks ago

This used Cardas Audio 2.0m (about 6.7 ft) power cord is in excellent condition, complete with factory packaging (including Cardas certificate). This is/was the latest version of this cord with the black heat shrink and Furutech plug and IEC. Retail new over $700 new, yours for only $375 plus shipping. These are great power cords for moderate size or small amps/integrated (tube or solid state) and also very good on digital sources.

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