Atma-SphereMa-1 mkiii otl ampsAtma-Sphere Ma-1 mkiii otl amps any voltage, warranty, 50%"The World's Largest Online Seller of Ultra High End Audio".If you are looking for a world class pair of tube monoblocks you can live with ... for life, this just might be t...9900.00

Atma-Sphere Ma-1 mkiii otl amps any voltage, warranty, 50% off [Expired]

no longer for sale

"The World's Largest Online Seller of Ultra High End Audio".

If you are looking for a world class pair of tube monoblocks you can live with ... for life, this just might be the deal for you. Here we have an as-new pair of Atma-sphere MA-1 MkIII (latest current version amps), with the factory installed POWER SUPPLY BOOST option (retail $2400 for this option) and this pair of amps is not even broken in yet with only 30 hrs total use and WITH FULL FACTORY WARRANTY at almost 50% off. A-stock units, factory tubes, immaculate condition ... you probably couldn't tell them from brand new ones!

These are the same identical amps used in the Sound Lab room at this years 2011 CES - THE Show.
Dick Olsher, upon hearing the system, said:
"this was the best sound I heard in Vegas."

1) MUSICAL POWER: 140 watts of glorious Triode OTL power,
2) RANGE: amazing frequency response of 1hz to 200Khz,
3) RELIABILITY: totally stable operation AND a warranty ... whew thats a deal thats hard to beat!

We take trades, provide interest free layaway and ship internationally (and yes we can provide these in YOUR voltage from 100 volts to 240 volts at no extra charge for voltage conversion).

Recipient of the Absolute Sound Golden Ear Award , the MA-1 has enjoyed an enviable reputation. The Mk.3.1 series builds on the advances of our decades-proven technology. An improved output section and enhanced driver circuit contribute to superior low level detail, smoother sound, wider bandwidth and AC power immunity. The new, rugged, non-magnetic chassis features classic looks with superior layout. Setup of the amplifier is simple with automatic bias.

The controls and switches are ergonomic without sacrificing performance. The MA-1 Mk.3.1 is easy to live with. It is easy on tubes and and tube failure is inconsequential. Despite its extreme performance, the MA-1 is known for remarkable ease of setup, ease of operation and day to day consistency.

REVIEW - by Paul Bolin Absolute Sound:
"Even though I spend much of the last two years listening to excellent power amplifiers, the Atma-Spheres proved to be a special and enlightening experience. The MA-1s, however, allow you to have your SET cake without those problems. The result of Ralph Karsten's patented design is an amplifier with high power (150 wpc) that can drive any speaker with a reasonably consistent impedance, ant that also has the harmonically luscious presentation associated with low-powered SETs. It combines that SET rich and lifelike midrange with superbly articulated deep bass and an open and airy treble. Its transient response is the finest I have heard at any price. It has no operational foibles and is a source of endless musical joy".

* Balanced Differential Design®
* All triode
* No tube matching
* Class-A operation
* automatic bias
* Patented Circlotronic® Output transformerless operation (OTL)
* Handwired mono construction
* Easily monostrapped for more power
* Standby switch for long output tube life
* Simple, reliable circuit --one stage of gain
* XLR and RCA input connectors
* V-Cap Teflon coupling capacitors- standard
* Custom built wire and resistors
* Precision components used throughout
* "Star" ground circuit
* Neo-classic chassis is available in custom finishes
* Three-year warranty - One year on tubes

* 140 watts/channel into 8 ohm load/135 watts into 4 ohm load before clipping.
* Power bandwidth: 2 Hz - 100 kHz within 1/2 db
* Frequency response (1 watt): 1 Hz - 200 kHz within 1/2 db
* IM distortion: less than .005% at full power
* THD: nominally less than 0.5% with proper setup
* 20 Hz Square Wave Tilt: unmeasurable
* Phase shift: less than 1 degree @ 20 kHz
* Power supply storage: 600 Joules/chassis
* Input impedance: 100K single-ended, 200K balanced
* Output section risetime: 600V/micro-second
* Output Impedance: ~2.3 Ohms (power method standard measurement)
* Input sensitivity: 2.8V
* Power consumption: 500 watts/chassis
* Tube complement: 14 6AS7s and 5 6SN7s per channel
* Weight: 36 lbs./chassis
* Dimensions 18" L x 17" W x 8.5" H

Trades accepted, interest free layaway available, international shipping no problem. See the LINK BELOW or visit

Best deal, best seller, safest transaction on this level of purchase as we regularly do $50K-$100K ONLINE transactions worldwide. Open to select partial trades.


PAYMENT & TERMS: Payment via bank wire transfer only on this item. Please allow 7 days for packing prior to shipping. All sales are final, no returns. HigherFi is not responsible for loss and/or damage that happens to any merchandise while being transported by a commercial carrier but we will file a claim with them on your behalf to assist you, if needed. To place an order, please call us, we are open 7 days a week.

Visit our Web Site to see over $8,000,000 of the worlds most exotic audio gear ... at far below retail prices. We have the largest selection of ultimate high-end audio available for sale, anywhere plus much, much more.

If you are a manufacturer of high end audio located anywhere in the world and seeking international sales, marketing and representation, we are currently looking for a few more product lines to represent, please contact us.

Contact us for details on how we can help you sell your high end system or components with no hastle, no risk, maximum results and no cost until until we sell. No matter where you are located, we can help you sell your audio and without risk.

We specialize in selling the worlds ultimate audio and have an extensive list of international client testimonials available online.


Open 10:00Am-8:00PM (Eastern Time / Florida) - 7 DAYS A WEEK
On the Web:
Email us at:
By Phone at: (952) 440-2226


Here is what some of our past customers had to say about us:

Having been an audiophile and a reviewer for over ten years, I have dealt with many people in the industry. My experience with Chris Moon of was one of the smoothest, hassle free experiences I have had. I'm sure we will work together again soon. Thanks Chris,
Greg Petan, Managing Editor/

Chris, many thanks for facilitating my purchase of the Wilson X-1 Series 3's. The speakers were just like new, as you said they would be, and your post-purchase advice about setting them up in my room has been extremely valuable. You made a deal happen that neither the seller nor I would have been able to make happen by ourselves ... but you made it happen. Thanks.
Professor L. Schwarz - Purdue University

The new Rockport Sirius III turntable ($55,000) arrived safely in mint condition as promised. I can wholeheartedly recommend you to any high-end purchaser looking for the most exclusive equipment in mint condition. I will be using your service again I have no doubt for many years to come.
Simon Kern - Hemisferik Audio (AUSTRALIA)

We were so happy purchasing ($50,000) Goldmund Apologue speakers from you. Especially, kind consideration about the satisfaction of
goods since arrival to Korea was so happy for us. I can be sure that we have a reliable relation for purchasing more goods from you. Thank you again!
James Jin-Sung, Park (SOUTH KOREA)

I just purchased the Wilson Wamm 7 speakers (retail $220,000) from you at HigherFi and could not be happier. After wiring the funds to you advance, you made everything happen smoothly and professionally. I would not hesitate to buy from you again or recommend you. Thanks for a smooth deal.
Ron Lapporte


Some of our past sales include:

Apogee Grand speakers -$75,000 retail
Audio Research Ref 600 amps -$35,000 retail
Audionote GakuOn amps -$100,000 retail
Avantgarde Trio speakers -$60,000 retail
B&W 800 Nautilus "SHELL" speakers -$80,000 retail
Boulder 2050 amps -$80,000 retail
Burmester 909 amps -$75,000 retail
Dali Megaline speakers-$50,000 retail
dCS - Scarlatti digital system-$70,000 retail
Dynaudio Evidence Master speakers -$85,000 retail
FM Acoustics 811 amps -$110,000 retail
Genesis 1.1 speakers -$180,000 retail
GamuT S-300 amps - $40,000 retail
Goldmund Apologue speakers -$90,000 retail
Jadis JA800 amps -$75,000 retail
JM Labs Grand Utopia Be speakers -$80,000 retail
Krell Evolution amps -$50,000 retail
Krell Master Reference MRA amps -$150,000 retail
Levinson ML33 amps -$35,000 retail
Magico Reference speakers -$150,000 retail
MBL 101e speakers -$50,000 retail
Metronome Kalista Reference CD -$50,000 retail
NTT Audiolabs Model 101 Mk II speakers - $200,000 retail
Pipedreams Model 21 speakers - $85,000 retail
Rockport Sirius III Turntables -$70,000 retail
Sonus Stradivari speakers -$40,000 retail
Transparent OPUS speaker cables -$35,000 retail
Transrotor Gravita turntable -$110,000 retail
Tube Research GT 800 amps -$160,000 retail
YG Acoustics Anat Ref 2 speakers -$107,000 retail
Von Schweikert VR-11 speakers -$150,000 retail
Walker Proscenium Gold turntable -$30,000 retail
Wavac SH-833 amps - $350,000 retail
Westlake Audio SM-1 speakers - $250,000 retail
Wilson WAMM 7A speakers -$225,000 retail
Wilson X-2 Alexandria speakers -$150,000 retail
and many more...

Open 10:00Am-8:00PM (Eastern Time / Florida) - 7 DAYS A WEEK
On the Web:
Email us at:
By Phone at: (952) 440-2226
Seller Information

HigherFi, Inc.  Verified Dealer

Last 12 months

Member since January 2012