{"product_id":"audio-research-vsi55","title":"Audio Research VSi55","description":"\u003cp\u003eVacuum Tube Integrated Amplifier (2003)\u003c\/p\u003e\n\n\u003cp\u003ePOWER OUTPUT: 50 watts per channel continuous from 20Hz to 20kHz. 1 kHz total harmonic distortion typically 1% at 50 watts, below .05% at 1 watt. Approximate actual power available at clipping 52 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) 12Hz to 90kHz.  FREQUENCY RESPONSE: (-3dB points at 1 watt) 1.0Hz to 100 kHz.  INPUT SENSITIVITY: 0.5V RMS Single-ended for rated output. (32dB gain into 8 ohms.)  INPUT IMPEDANCE: 50K ohms Single-ended.  INPUTS (5): CD, Tuner, Video, SE1, SE2 (Single Ended RCA connectors).  MAXIMUM INPUT: 3.5V RMS (any input). Optional 6dB pad for CD input.  OUTPUT POLARITY: Non-Inverting (any input).  PUSH BUTTONS: Volume up, Volume down. (70 steps, 20 LED indicators), Input, Mono, Mute, Power. All functions on IR remote control.  OUTPUT TAPS: 8 ohms, 4 ohms.  OUTPUT REGULATION: Approximately 1.5dB 8 ohm load to open circuit (Damping factor approximately 5).  MONO SUBWOOFER OUTPUT: 1V RMS at rated power.  OVERALL NEGATIVE FEEDBACK: 10dB.  SLEW RATE: 10 volts\/microsecond.  RISE TIME: 2 microseconds.  HUM \u0026amp; NOISE: Less than 0.14mV RMS 103dB below rated output (IHF weighted, input shorted).  POWER SUPPLIES: Electronically regulated Low and High voltage supplies for input stages. Automatic 30 sec. warm-up\/brown-out mute.  POWER SUPPLY ENERGY STORAGE: Approximately 166 joules.  POWER REQUIREMENTS: 100-125VAC 60Hz (200-250VAC 50Hz) 320 watts at rated output, 500 watts maximum, 205 watts at idle. 0.5 watts power off.  TUBES REQUIRED: 2 Matched pair 6550EH Power Output; 3 6N1P input and driver.  DIMENSIONS: 14\" (35.6 cm) W x 8\" (20.3 cm) H x 16\" (40.6 cm) D. Rear connectors extend .88\" beyond chassis.  WEIGHT: 34 lbs. (15.5 kg) Net; 40 lbs. (18.2 kg) Shipping.\u003c\/p\u003e","brand":"Audio Aero","offers":[{"title":"Default Title","offer_id":59370731831641,"sku":"2423","price":1790.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1066\/5721\/8905\/files\/audio-research-vsi55-1.jpg?v=1789119110","url":"https:\/\/wenwaudio.com\/products\/audio-research-vsi55","provider":"W\u0026WAudio","version":"1.0","type":"link"}