The PA-1 Battery Operated Pre-Amplifier

Designed by Dick Sequerra

PA-1 Pre-Amplifier

The PA-1 dual phono preamplifier and its battery operated power supply represents a state of the art realization of the best thinking of Dick Sequerra to reach the goal of a completely transparent noiseless preamplifier and control system.

The PA-1 and PA1-P will give the user an open door to music without adding or subtracting anything.

A product made by a music lover for music lovers.

PA-1 PRE-AMPLIFIER TECHNICAL SPECIFICATIONS
• Frequency Response: ± .2dB 5Hz to 100kHz.
• Harmonic distortion plus noise: 10Hz to 50kHz.
- .003% @ 10v output.
- .006% @ 1v output.
• Signal to Noise - unweighted 5Hz to 100kHz - 120dB.
• Maximum input level - Line - 3 volts RMS.
• Maximum input level - Moving coil phono - 50 mv.
• Maximum input level - Moving Magnet phono - 500 mv.
• Input Impedance: Line levels:
- Balanced: 10K ohm.
- Unbalanced: 10K ohm.
• Input Impedance - Moving coil phono: Switch 250, 350 and 500 ohms.
• Input Impedance - Moving Magnet phono: 47K ohms.
• Output Impedance:
- Balanced: 100 ohms.
- Unbalanced: 100 ohms.
• Input Level Attenuator: 0dB, -3dB, -6dB, -9dB, -12dB, -15dB, -18dB, -21dB, -24dB.
• Inputs phono (2 ea.):
- Unbalanced moving coil preamp.
- Unbalanced moving magnet preamp.
• Inputs (4 ea.) line level inputs switchable balanced or unbalanced.
• Input sensitivity phono for 5 cm velocity: Moving coil: 0.3 mv - Moving magnet: 2.0 mv.
• Outputs:
- Main (2 ea.) balanced and unbalanced.
- Tape (1 ea.) balanced and unbalanced.
- Sub-woofer: (1 ea.) unbalanced.
• Sub-woofer output frequency response: 90Hz -6dB, 800Hz -50dB.

PA-1 PRE-AMPLIFIER FRONT PANEL CONTROLS
• Selector,6 position: moving coil, moving magnet, CD, tuner, tape, aux.
• Input level attenuator: 9 position.
• Balance.
• Sub-woofer level.
• Volume.
• Tape copy - switch.
• Channel - normal/reverse switch.
• Stereo/Mono - switch.
• On/Off switch.
• Phase - normal/reverse switch.
• Mute on/off switch.
• Indicators:
Input overload - Red LED.
+18 volts - Green LED.
-18 volts - Green LED.

PA1-P POWER SUPPLY TECHNICAL SPECIFICATIONS
• Input voltage 120 -240 VAC 50Hz - 60Hz.
• Output voltage ± 18 volts DC @ 10 Amp hours.
• Battery compliment: 6 ea. 6 volt @ 10 Amp hours lead acid.
• Ultra low noise AC supply for operation from the AC line.
• Built-in automatic battery chargers.

PA1-P POWER SUPPLY BATTERY CONDITION STATUS INDICATORS
• AC on.
• Charge.
• Float.
• Low battery.
• Operate.

PA-1 PRE-AMPLIFIER MECHANICAL SPECIFICATIONS
• Width: 21” (533 mm)
• Depth: 11” (280 mm)
• Height: 7 ½” (190 mm)
• Weight: 11 lbs. Cabinet 15 lbs., 26 lbs. Total (11.8 kilos)

PA1-P POWER SUPPLY MECHANICAL SPECIFICATIONS
• Width: 21” (533 mm)
• Depth: 11” (280 mm)
• Height: 7 ½” (190 mm)
• Weight: 43 lbs. Cabinet 15 lbs., 58 lbs. Total (26.4 kilos)

LIMITED WARRANTY AND MANUFACTURING INFORMATION
• PA-1 Pre-Amplifier Warranty: Unconditionally to the original owner for a period of (5) years against any manufacturing error or defect EXCEPTING BATTERIES.
• Sequerra Associates, Ltd. Reserves the right to change and/or modify the PA-1 Pre-Amplifier and/or PA-1P Power Supply at anytime without notice.

PA-1 PRICE AND PURCHASE INFORMATION
• The PA-1 Pre-Amplifier is part of the Sequerra Music System.
• SMS components are availlable in a variety of exotic wood cabinets.
• The PA-1 is made To Order on a Custom Basis Only.
• Price: US$ 30,000.00 (each).
• Please contact Sequerra Associates to audition the PA-1 in the Sequerra Music System.