The UA-1 Class "A" Amplifier
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The UA-1 Class "A" Amplifier
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| UA-1 PROPRIETARY DESIGN FEATURES |
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• Balanced differential DC Amplifier circuit topology for the input and driver
stages. • Only one capacitor coupling to the output stages. • Unique ultra wide band output transformer. • Amplifier power bandwidth of 10 Hz to 120 kHz. • Built in digital volt meter to check the output tubes for balance. • Separate regulated power supplies. • All power supplies have choke input filtering. • greatly reduces the interference from AC power lines as well as stabilizing the voltages prior to regulation. |
| UA-1 AMPLIFIER TECHNICAL SPECIFICATIONS |
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• Power Output: 100 Watts continuous. • Amplifier Class “A”. • Dynamic Head Room: +4dB. • Power Bandwidth: -3dB - 10Hz to 120 kHz. • Frequency Response: -3 dB - 8 Hz to 130 kHz. • Input Impedance: 10K ohms. • Signal to Noise: unweighted > 120dB. • Input Sensitivity: .565 volts for full output. • Negative Feedback: 4.5dB. • Harmonic Distortion: @ 1kHz - 100 Watts: - .36% - 50 Watts: - .2% - 20 Watts: - .07% - 10 Watts: - .038% - 1 Watt: - .01% • Harmonic Distortion: @ 80 kHz - 80 Watts: - 2.1% • Harmonic Distortion: @ 20 kHz - 80 Watts: - .4% • NOTE: all outputs to 100 Watts have a 3rd order harmonic distortion product. There are no measurable 5th , 7th or 9th order distortion products. • CCIR intermodulation products are below our measurement ability. • Phase Shift at 100kHz is 20 degrees. • Peak Soft Limiting. • Output impedance available: 4 ohms - 8 ohms. • Input connectors: 3-pin XLR and RCA Jack. • Dynamic Linearity > 120dB. • Number of Vacuum Tubes: 15. |
| UA-1P POWER SUPPLY TECHNICAL SPECIFICATIONS |
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• Power requirements 120-240, 50Hz - 60Hz: @ 7.5 Amps for 120 volts. @ 3.8 Amps for 240 volts. • Mains Power Switch Heineman Magnetic Circuit Breaker. • All Regulated Supplies individually fused. • All Power Supplies are choke input. • (6) ea. Regulated Power Supplies. - (2) ea. High Voltage Plate Supply with Time delay Relay. • (4) ea. Vacuum Tube Regulator. • (7) ea. Solid State Filament Regultaors. • (1) ea. Zener Regulator. • Low Stored Energy Rectifiers. |
| UA-1 AMPLIFIER MECHANICAL SPECIFICATIONS |
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• Width: 19” - (482 mm) • Depth: 24” - (610 mm) • Height: 12” - (305 mm) • Weight: 50 lbs. - (23 Kilos) |
| UA-1P POWER SUPPLY MECHANICAL SPECIFICATIONS |
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• Width: 19” - (482 mm) • Depth: 24” - (610 mm) • Height: 12” - (305 mm) • Weight: 120 lbs. - (55 Kilos) |
| LIMITED WARRANTY AND MANUFACTURING INFORMATION |
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• UA-1 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 UA-1 Amplifier and/or UA-1P Power Supply at anytime without notice. |
| UA-1 PRICE AND PURCHASE INFORMATION |
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• The UA-1 Amplifier is part of the Sequerra Music System. • SMS components are availlable in a variety of exotic wood cabinets. • The UA-1 is made To Order on a Custom Basis Only. • Price: US$ 90,000.00 (per stereo pair). • Please contact Sequerra Associates to audition the UA-1 in the Sequerra Music System. |
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