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MSB The S500 Stereo Amplifier

MSB redefined the idea of what an amplifier can be, embedding the S500 with a fully modular design alongside a 1.0 Farad Power Core, a matched impedance input stage and an all billet CNC case. The finest amplifier we’ve ever created, the 500 series redefines excellence and sets a new bar in the industry.

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The world’s leading DACs needed an amplifier to match. The result was a clean slate design that could meet our DAC’s ultra high dynamic range head on. With the amplifier’s architecture optimized in critical areas, audio performance, longevity, and an ability to drive any speaker became our principal design parameters. We redefined the idea of what an amplifier can be, embedding the S500 with a fully modular design alongside a 1.0 Farad Power Core, a matched impedance input stage and an all billet CNC case. The finest amplifier we’ve ever created, the 500 series redefines excellence and sets a new bar in the industry. The S500 features a discrete design featuring a class A matched impedance input stage. This result is a product with minimized signal reflections, input noise, and distortion while also maximizing power transfer and dynamic range in a zero negative feedback design. With custom low-noise high-current toroidal transformers and rugged high-current output buffers, the S500 provides a transparent, holographic listening experience that’s completely fatigue free. All components were meticulously chosen for their sonic performance and longevity, ensuring your amplifier is built to last. The 500 series amplifier is designed and lovingly crafted in our factory based in California. Each of the heatsinks start out as a 51lb aluminum block before sixty percent is removed over eight hours of machining, resulting in 17.5 lbs of refined aluminum. This high efficiency design provides a surface area of over 10,000 sq in per amplifier. What’s more–the fin thickness is slightly varied to help reduce resonances and ringing in the heatsinks, while multiple high power heat pipes distribute heat evenly for optimal thermal and electrical performance.
Technical Specifications
Static Power Consumption 270 Watts On Standby power less than 2 watts
Operating Voltage Range 100V or 105-130V/210-260V configured at the factory.
Fuse 1/4"x1-1/4" 15A 250V Slow Blow
Input 2x XLR Input
Output 1x Binding post set per channel
Controls Gain switch Input Impedance Switch On/Off Button Standby button Display Dimmer 12V Mode Switch 2x MSB 12V trigger port
Continuous Power Output (8Ω) < 1% distortion 500 W
Continuous Power Output (4Ω) < 1% distortion 900 W
Frequency Response (20 to 20kHz) ±0.025dB
Signal to Noise (20 to 22kHz) >134dB (>137dBA)
Equivalent Input Noise (22kHz BW) 0.5μV
Crosstalk @ 2kHz >110dB
Low Gain (75Ω input) 14.8dB
Medium Gain (75Ω input) 20.8dB
High Gain (75Ω input) 26.8dB
Input Impedance (User Selectable) 75Ω / 300Ω / 1.2kΩ
Chassis Dimensions
Width: 15 in (381 mm)
Depth: 23.25 in (590 mm)
Height: 10.5 in (267 mm)
Weight: lbs ( kg)

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