ATMA-SPHERES-30 MKII - CLASS A TUBE AMPATMA-SPHERE S-30 MKII - CLASS A TUBE AMP S-30 MK 3.3 Model - AWARD WINNING!NEW PRISTINE CONDITION SHOW DEMO AVAILABLES-30 MK3.3 model MADE IN USA6 MONTHS SAME AS CASH FINANCING AVAILABLE ! 0% APR - 1-2-3 YEARS SAME AS CASH ALSO AVAILABLE! 0% APR NO FINANCE CHARGESCOME VIS...4200.00

ATMA-SPHERE S-30 MKII - CLASS A TUBE AMP S-30 MK 3.3 Model - AWARD WINNING! [Expired]


no longer for sale

NEW PRISTINE CONDITION SHOW DEMO AVAILABLE

S-30 MK3.3 model 

MADE IN USA

6 MONTHS SAME AS CASH FINANCING AVAILABLE ! 

0% APR - 1-2-3 YEARS SAME AS CASH ALSO AVAILABLE! 0% APR NO FINANCE CHARGES

COME VISIT OUR WORLD CLASS SHOWROOM IN SCOTTSDALE ARIZONA


We assure our clients of our continued commitment to full satisfaction and delight.

Open 7 days, 10am to 8pm Ocean West

USA Tube Audio - Since 1976 
Please call 1-800-676-1085 Sales Ext 2 - USA + Canada 
1-323-657-5993 International 
52-55-8525-6102 Mexico 

www.usatubeaudio.com


USA TUBE AUDIO CAN OFFER ATMA-SPHERE PRODUCTS IN TERRITORIES WHERE THERE IS NOT  A LOCAL ATMA-SPHERE DEALER - USA TUBE AUDIO RESPECTS ATMA-SPHERE DEALER TERRITORIES  

ATMA-SPHERE S-30 - THE FINEST TRIODE, PURE CLASS A, STEREO VACUUM TUBE AMPLIFIER AT ANY PRICE!    

A fast tight bass, warm fluid mids, super smooth highs. Very three dimensional, holographic. Very Musical.

The S-30 is the unchallenged state-of-the-art in low power vacuum tube amplifiers. With its simplicity of operation, small footprint, and all the features of our larger amps, the S-30 represents the high-water mark of compact OTL design. 

For audiophiles who seek the ultimate in amplifier design and are realistic about their budget, the S-30 gives you the same precision and sound quality that Atma-Sphere is known and recognized for. Featuring automatic bias and a large VU meter, operation is elegantly simple. 

And because it utilises decades-proven patented handwired circuitry, it is stable with any load and both performs and sounds better than any single-ended amplifier ever produced, let alone conventional push-pull designs. Its fully-balanced design and proven class-A triode operation make the S-30 the ideal choice for the discriminating audiophile.

Balanced Differential Design®

• Class-A operation

• Patented Circlotronic® direct-coupled (OTL) output stage

• Dual-mono chassis construction

• Automatic bias - no adjustment needed

• Built in VU meter for tube and output monitoring

• Easily monostrapped for greatly increased power

• Uses only one gain stage for supreme clarity of sound

• Proprietary precision components used throughout

• Low-noise "star" grounding topology

• Fully hand-wired point-to-point electronics - no circuit boards!

• Stable with all input and load conditions

• Exclusively uses Octal-Triode based vacuum tubes

• Classic open chassis construction with Wrinkletex™ finish

• Three-year general coverage warranty, one year warranty on output tubes



SPECIFICATIONS

Output power

30 watts per channel into 8 Ω load

45 watts per channel into 16 Ω load

Impedance

Input Impedance: 100 KΩ single-ended, 200 KΩ balanced 

Output Impedance: 7 Ω

Input

3 V sensitivity 

RCA and XLR true balanced input

Tube complement

10 x 6AS7G output tube 

6 x 6SN7 driver tube

Gain

23dB ( for 8 Ω )

Power Bandwidth

2Hz-75KHz within ½ dB

Frequency response

( 1 watt, open loop ) 20 Hz squarewave Tilt; unmeasureable 

1Hz-200KHz within 3 dB

Hum and noise

Less than -75db below 1 watt, -95db below full power (30 watts) 

Distortion

Total Harmonic Distortion ( THD ) typically 1% at full power 

Intermodulation ( IM ) distortion typically under .04% at full power 

Phase shift less than 1° @ 20KHz 

Output section risetime

600 V/µs 

Feedback

2 dB

Warranty

Three year general coverage 

One year for output tubes



MADE IN USA

6 MONTHS SAME AS CASH FINANCING AVAILABLE ! 

0% APR - 1-2-3 YEARS SAME AS CASH ALSO AVAILABLE! 0% APR NO FINANCE CHARGES

COME VISIT OUR WORLD CLASS SHOWROOM IN SCOTTSDALE ARIZONA

We assure our clients of our continued commitment to full satisfaction and delight.

Open 7 days, 10am to 8pm Ocean West

USA Tube Audio - Since 1976 
Please call 1-800-676-1085 Sales Ext 2 - USA + Canada 
1-323-657-5993 International 
52-55-8525-6102 Mexico 

www.usatubeaudio.com

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