Atma-Sphere Atma-Sphere S-30
High End OTL Tube Amplifier, 2 x 30 Watts, Mk 3.3
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 those who seek the ultimate in amplifier design the S-30 gives you the same precision and sound quality for which Atma-Sphere is known. Featuring automatic bias and a large VU meter, operation is elegantly simple.
The S-30 utilises decades-proven patented handwired circuitry so is stable with any load. It performs and sounds better than any single-ended amplifier; a nice choice for a loudspeaker that does not need high power. Its fully-balanced design and proven class-A triode operation makes the S-30 the ideal choice for the discerning audiophile.
FEATURES
- Balanced Differential Design®
- Class-A2 operation- Patented Circlotronic® direct-coupled (OTL) output stage- Dual-mono chassis construction- Automatic bias- Built in VU meter for tube and output monitoring- Uses only one gain stage for supreme clarity of sound
- Precision components used throughout
- Low-noise "star" grounding topology- No circuit boards- hand wired- Stable (will not oscillate) with all input and load conditions- Uses only octal triode vacuum tubes- Classic open chassis construction with Wrinkletex™ finish- Three-year general coverage warranty, one year warranty on output tubes
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Specifications
- Output power
- 30 watts per channel into 8 Ω 45 watts per channel into 16 Ω
- 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 ¾ dB
- Frequency response
- 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
- Power consumption
- 400 watts
- Dimensions & Weight
- 13" deep x 17" wide x 8" tall ( 33 x 43 x 20 cm ) 24 lbs ( 10.9 kg ), without tubes
- Warranty
- Three year general coverage, one year for output tubes
Manufacturer's Description — Atma-Sphere
High End OTL Tube Amplifier, 2 x 30 Watts, Mk 3.3
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 those who seek the ultimate in amplifier design the S-30 gives you the same precision and sound quality for which Atma-Sphere is known. Featuring automatic bias and a large VU meter, operation is elegantly simple.
The S-30 utilises decades-proven patented handwired circuitry so is stable with any load. It performs and sounds better than any single-ended amplifier; a nice choice for a loudspeaker that does not need high power. Its fully-balanced design and proven class-A triode operation makes the S-30 the ideal choice for the discerning audiophile.
FEATURES
- Balanced Differential Design®
- Class-A2 operation- Patented Circlotronic® direct-coupled (OTL) output stage- Dual-mono chassis construction- Automatic bias- Built in VU meter for tube and output monitoring- Uses only one gain stage for supreme clarity of sound
- Precision components used throughout
- Low-noise "star" grounding topology- No circuit boards- hand wired- Stable (will not oscillate) with all input and load conditions- Uses only octal triode vacuum tubes- Classic open chassis construction with Wrinkletex™ finish- Three-year general coverage warranty, one year warranty on output tubes
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Authorized dealers for Atma-Sphere Atma-Sphere S-30
- Afton Mountain Audio — in-store — Afton, Virginia, United States (website)
- Audio Perfection — online and in-store — Minneapolis, Minnesota, United States (website)
- Audio Revolutions — in-store — Khwaeng Thung Phaya Thai, Krung Thep Maha Nakhon (website)
- Phantom Audio — in-store — Jakarta, Jakarta, Indonesia (website)
- Salon One Audio — in-store — Ormond Beach, Florida, United States (website)
- Signature Sound — in-store — Liverpool, New York, United States (website)
- Sounds Of Silence — in-store — Nashua, New Hampshire, United States (website)
- Sun Mountain AV — in-store — Colorado Springs, Colorado, United States (website)
- Triode Picture + Sound — in-store — New York, New York, United States (website)
- USA Tube Audio — online and in-store — Phoenix, Arizona, United States (website)
and 1 more verified dealer