Audio Research GSPre Preamplifier 規格特點
• Stereo Vacuum tube Line and Phono preamplifier with Headphone amplifier in one attractive package.
• Pure Class-A differential amplifiers in the Line stages, no feedback.
• Pure Class-A SE amplifiers in the Phono stages, no feedback.
• VF display with Blue LED’s for Phono Loads and mode selected, and rotating Volume & Input Select encoder.
• Hand held IR Remote and RS-232 and remote IR inputs for whole home audio system.
• Balance and SE input/output.
• 7 levels of voltage regulation and a low noise R-core power transformer.
• Phono stage features low noise JFET inputs and 6H30 outputs as well as programmable loading.
• Line stage features low noise JFET inputs and 2 parallel 6H30 outputs.
• Features custom designed coupling capacitors in the line and phono stages.
• +12v trigger output to turn on power amplifier and other system components.
• Low distortion vacuum tube headphone amplifier designed for driving a wide impedance range, 30-300 ohms.
• Removable 15A IEC power cord.
FREQUENCY RESPONSE:
line: +/-.3dB 2Hz to 80kHz; : -3dB 0.8Hz to 220KHz
Phono: +/- 0.1dB of RIAA 10Hz to 20KHz, +/-0.4dB 5Hz to 80KHz
Headphone: +/-0.05dB 20Hz to 20KHz; : -3dB 0.8Hz to 220KHz
THD+N @ 1KHZ:
line: <.002% at 2V RMS, Bal output
Phono: <.005% at 3V RMS output, to Record output
Headphone: <.009% at 1V RMS output
GAIN @ 1KHZ
line: 13.8 dB, Processor: 0dB
Phono: 58dB @ 1KHz to Record output
Headphone: 11.3dB
NOISE (A-WEIGHTED)
line: <-101dBV volume at max.
Phono: <-77dBV to Record output
Headphone: <-88dBV volume at max.
CHANNEL SEPARATION @ 1KHZ
line: > 75dB Balanced output
Phono: >70dB to Record output
Headphone: >60dB
SIGNAL TO NOISE RATIO @ 1KHZ, A-WEIGHTED
line: >125dB Balanced output
Phono: >94dB to Record output
Headphone: >110dB
INPUT IMPEDANCE
150K ohms Balanced, 75K ohms SE; Phono impedance programmable (100, 200, 500, 1000 or 47K ohms w/200pf unbalanced)
OUTPUT IMPEDANCE @ 1KHZ
500 ohms Balanced, 250 ohms SE; <.05 ohms Headphone SE.
MAXIMUM INPUT
line: 12V RMS Balanced, 6.0V RMS SE.
Phono: 11mV RMS at 1KHz.
RATED OUTPUT
line: 2V RMS (1V RMS SE) into 200K ohms balanced load (maximum balanced output capability is 15V RMS at less than .5% THD+N at 1KHz.)
Phono: 0.5V RMS into 200K load, Max output same as Line stage.
Headphone: 6V RMS maximum into 30 to 300 ohm load.
CONTROLS
Volume, Input Selector.
5 Push Buttons: Power, Mute, SPKR Off, Mono, Menu.
Rear; RS-232 control, Remote IR input & Remote Trigger out.
POWER SUPPLIES
Electronically regulated low and high voltage supplies.
Automatic 45 sec. warm-up & brown-out mute.
Line regulation better than .01%.
TUBE COMPLEMENT: (6) 6H30P dual triodes.
POWER REQUIREMENTS: 100-125VAC 60HZ (200-250VAC 50/60Hz) 105 Watts. Standby: 1.5 Watts.
DIMENSIONS: TBD
WEIGHT: TBD
Audio Research GS150 Power Amplifier 規格特點
POWER OUTPUT: 155 watts per channel continuous from20Hz to 20kHz. 1kHz total harmonic distortion typically 0.6% at 155 watts, below 0.03% at 1 watt.Approximate actual power available at ‘clipping’ 160 watts (1kHz). (Note that actual power output is dependent upon both line voltage and ‘condition’ i. e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.)
POWER BANDWIDTH: (-3dB points) 5Hz to 80kHz.
FREQUENCY RESPONSE: (-3dB points at 1 watt) 0.5Hz to 120 kHz.
INPUT SENSITIVITY: 2.0V RMS BAL for rated output. (24 dB Bal gain into 8 ohms.)
INPUT IMPEDANCE: 300K ohms Balanced.
OUTPUT POLARITY: Non-inverting. Balanced input pin 2+ (IEC-268).
OUTPUT TAPS: 8 ohms, 4 ohms.
OVERALL NEGATIVE FEEDBACK: 14dB.
SLEW RATE: 13 volts/microsecond.
RISE TIME: 2.0 microseconds.
HUM & NOISE: Less than 0.1mV RMS – 114dB below rated output (IHF weighted, input shorted).Controls: Rotary selector for tube bias, Power on/off, fan speed, auto shut-off on/defeat, RS232, 12V trigger
POWER SUPPLY ENERGY STORAGE: Approximately 1040 joules.
POWER REQUIREMENTS: 105-125VAC 60Hz (210-250VAC 50Hz) 730 watts at rated output, 900 watts maximum, 420 watts idle.
TUBES REQUIRED: 4 – Matched pair KT150 – Power Output; 4 – 6H30 Driver.
DIMENSIONS: 19″ (48.3 cm) W x 9 3/8″ (23.8 cm) H x 22 3/4″ (57.8 cm) D.
WEIGHT: TBA
