ESC
S-30 Mk. III.2

S-30 Mk. III.2

BrandAtma-Sphere
ManufacturerAtma-Sphere Music Systems, Inc.
FunctionAmplifier, Power
Produced2012-2015
CountryUnited States
Form FactorStandard Width
Signal PathAnalog Hardware
Dimensions43.2 × 20.3 × 33 cm (W × H × D)
Weight24lbs
Power400W
Frequency Response2Hz-75kHz ±0.5dB
Output Power (16/8Ω)45W/30W
Amplifier TopologyClass A
Amplifier TypeOutput Transformerless (OTL)
Input Sensitivity3V
Input Impedance (Unbalanced)100kΩ
Input Impedance (Balanced)200kΩ
Output Impedance7Ω
THD (Rated Output)1%
IMD (Rated Output)0.04%
Gain (8Ω)23dB
Frequency Response (1W)1Hz-200kHz ±3dB
Output Section Risetime600V/µs
SNR (1W)75dB
SNR (30W)95dB
Feedback2dB
Phase Shift (20kHz)<1°
Output Tube6AS7G
Tube Complement6AS7G (x10), 6SN7 (x6)
Connections
  • Input (Unbalanced) · RCA (Phono, Cinch) · Stereo, Socket (Female), Unbalanced
  • Input (Balanced) · XLR · Stereo, Socket (Female), Balanced