The Model 9-SS Amplifier

Designed by Dick Sequerra

Model 9-SS

The Model 9-SS power amplifier is a solid state input / vacuum tube output, low feedback design. It has 6 regulated power supplies assuring stable operation throughout its operational life of 30 years or more. Included is a precision digital voltmeter which is used to measure all the regulated voltages as well as the bias settings on the output tubes.


Click for larger image:
Model 9-SS FrontModel 9-SS OpenModel 9-SS Back

Switch selectable output class:
Ultra-Linear @ 80 watts.
Triode Class-A @ 40 watts.
Selectable inputs; balanced or unbalanced.
The Model 9-SS is based on the design of the UA-1 Power Amplifier.

MODEL 9-SS AMPLIFIER TECHNICAL SPECIFICATIONS

• Power Output: Ultra Linear - 80 watts continuous.
• Power Output: Triode Class 'A' - 40 watts continuous.
• Dynamic Head Room: +2dB.
• Dynamic Linearity 100dB.
• Power Bandwidth: -3dB - 8Hz to 120 kHz.
• Frequency Response: -3dB - 8 Hz to 120 kHz.
• Input Impedance: 10K ohms.
• Input Sensitivity: 150mv RMS for full output.
• Signal to Noise: unweighted > 90dB.
• Harmonic Distortion - Triode Class 'A' : 10 Watts @ 20Hz - 0.1%.
• Harmonic Distortion - Triode Class 'A' : 10 Watts @ 1kHz - 0.05%.
• Harmonic Distortion - Triode Class 'A' : 10 Watts @ 20 kHz - 0.2%.
• CCIR intermodulation products are below our measurement ability.
• Phase Shift at 100kHz is < 20 degrees.
• Peak Soft Clipping.
• Output impedance available: 8 ohms or 2 ohms.
• Input connectors: 3-pin XLR and RCA Jack.
• Number of Vacuum Tubes per chasis: Four(4) EL-34; One(1) 5687; One(1) 12B4.
• Power Consumption: 320 watts.

MODEL 9-SS AMPLIFIER MECHANICAL SPECIFICATIONS
• Chassis: Width: 17.5”; Depth: 18”; Height: 8”.
• Front Panel: Width: 18"; Depth: 1/4"; Height: 11 3/4".
• Finish: Chassis - Gold anodized; Front Panel - Clear Anodized.
• Weight: 51 lbs.

LIMITED WARRANTY AND MANUFACTURING INFORMATION
• MODEL 9-SS AMPLIFIER Warranty: Unconditionally to the original owner for a period of (5) years against any manufacturing error or defect EXCLUDING TUBES.
• Sequerra Associates, Ltd. Reserves the right to change and/or modify the MODEL 9-SS AMPLIFIER at anytime without notice.

MODEL 9-SS AMPLIFIER PRICE AND PURCHASE INFORMATION
• The MODEL 9-SS is made To Order on a Custom Basis Only.
• Price: US$ 15,000.00 (per stereo pair).
• Please contact Sequerra Associates to audition the MODEL 9-SS in the Sequerra Music System.