VT80 SE Stereo Amplifier The VT80SE was created as a flexible, great-sounding amplifier that is easy to enjoy and easy to live with, every day. A direct descendant of our Reference amplifiers that borrows from their acclaimed designs and using many of their parts, the VT80SE sounds like a much larger amplifier with impressive dynamics, control, and resolution. A fully-balanced design A fully-balanced design that uses only two pairs of KT150 output tubes, it can be connected via balanced or single-ended inputs. Operation is carefree; simply drop in the tubes and the VT80SE’s proprietary circuit automatically adjusts for tube wear or powerline fluctuations in real time, making the occasional bias adjustment a thing of the past. It also works with other common output tubes like the 6550, KT88 or the KT120. Each output tube is fused, so there are no worries, all you have to do is turn it on and enjoy the music. The VT80SE will be a revelation in your system. Its natural clarity, coupled to its intoxicating tonal palette and sheer dynamic swing, will bring your music to life. After more than 50 years, our focus remains the advancement of the state-of-the-art in music reproduction. Every component is meticulously hand-crafted and personally auditioned before it leaves our Minnesota facility. Our attention to detail, customer service, and product support create unprecedented value. An Audio Research component is more than a purchase, it is an investment. TECHNICAL SPECIFICATIONS Power Output 75 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at 75 watts, below 0.05% at 1 watt. (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) 7Hz to 60kHz Frequency Response (-3dB points at 1 watt) 0.7Hz to 80kHz Input Sensitivity 1.4V RMS BAL for rated output. (25dB Bal gain into 8 ohms. Input Impedance 300K ohms Balanced (150K ohms SE) Output Impedance Non-inverting. Balanced input pin 2+ (IEC-268) Output Taps 8 ohms, 4 ohms Output Regulation Approximately 1.0dB 8 OHM LOAD TO OPEN CIRCUIT (Damping factor approximately 8) Overall Negative Feedback 15dB Slew Rate 10 volts/microsecond Rise Time 4.0 microseconds Channel Separation 112dB Hum & Noise –84dBV weighted, 8 ohms tap Signal to Noise 112dB Control Power on/off, auto shut-off on/defeat, Input BAL/SE, RS232, 12V trigger Ambient Air Temperature 30° C (86° F) maximum ambient air temperature Power Supply Energy Storage Approximately 350 joules Power Requirements 100-125VAC 60Hz (200-250VAC 50Hz) 410 watts at rated output, 500 watts maximum, 230 watts idle. Sleep power < 1 watt Tubes Required 2 – Matched pair KT150 – Power Output; 2 – 6H30 Driver Weight 45.7lbs. (20.7 kg) Net; 60.5 lbs. (27.4 kg) Dimensions width: 19” (48.3 cm) height: 10.33” (26.2 cm) depth: 18.45” (46.8 cm) to chassis , 19.40” (49.3 cm) to terminals
