Thesis HV venti

Thesis HV venti is a 2-Channel Amplifier from Audison with dual-mono construction and four synchro-PWM power supplies. The MOSFET-BJT hybrid configuration uses discrete IGBTs, two Hitachi DMOS, and two pairs of complementary Sanken Power BJTs, each designed for 30 A peak current and 200 W power loss. The Class A preamplifier and driver is symmetrically built up to the driver outputs, with 90 V supply for the front-end stage and two separate channels. A separate 150 V power supply is thermally stabilized and biased in Class A. The symmetrical input combines a complementary JFET differential and a complementary BJT differential; the voltage amplifier is implemented as a cascode with a buffer. The output power is 400 W x 2 at 4 Ohm, 800 W x 2 at 2 Ohm, and 900 W x 1 at 4 Ohm at 14.4 VDC and 1% THD, with a total RMS power of 1600 W. The bandwidth is 4 Hz to 75 kHz, the S/N ratio is 100 dB, and the damping factor is 80. Additional features include fully relay-switched signal routing, exclusively discrete components, Dual Power and Bias Selector functions, Hi and Low Level inputs, and a 5 mm aluminum housing with two side cooling channels.

• 2-Channel Amplifier
• Dual-mono construction with four synchro-PWM power supplies
• MOSFET-BJT hybrid configuration with discrete IGBTs; two Hitachi DMOS drive two pairs of complementary Sanken Power BJTs (each 30 A peak current, 200 W power loss)
• Class A preamplifier and driver, symmetrically built up to the driver outputs
• Fully symmetrical input circuit with complementary JFET differential (first stage) and complementary BJT differential (second stage)
• Voltage amplifier as a cascode with buffer to drive the output stage
• Separate power supply: 90 V for front-end and channels; separate 150 V power supply, thermally stabilized and biased in Class A
• Manufactured exclusively with discrete components; signal routing exclusively via relays
• Power supply on a separate board
• Dual Power function to switch between Hi-Current and Hi-Power
• Bias Selector to change the Class A percentage
• Hi Level Input and Low Level Input
• High-quality Crossover module included
• 5 mm aluminum housing with two side cooling channels

• Channels: 2
• Amplifier Class: A-Class
• Hi Level Input: Yes
• Low Level Input: Yes
• Digital Input: No
• Supply Voltage: 11–16 VDC
• Idle Current: 4.2 A
• Idle Current when Off: 0.006 mA
• Power Consumption at 14.4 VDC, 2 Ohm, maximum music power: 90 A
• Remote IN: 7–16 VDC, 1 mA
• Distortion (THD) @ 100 Hz, 4 Ohm, 70% rated power: < 0.05 %
• Bandwidth (-3 dB, 2 VRMS, 4 Ohm): 4 Hz – 75 kHz
• Signal-to-Noise Ratio (A-weighted @ 1 V): 100 dB
• Damping Factor (1 kHz, 4 Ohm): 80
• Input Sensitivity (Pre-In high): 0.25 – 1.6 VRMS
• Input Sensitivity (Pre-In low): 1 – 7 VRMS
• Total RMS Power: 1600 W
• Output Power (RMS) @ 14.4 VDC, 1% THD, 2 channels at 4 Ohm: 400 W x 2
• Output Power (RMS) @ 14.4 VDC, 1% THD, 2 channels at 2 Ohm: 800 W x 2
• Output Power (RMS) @ 14.4 VDC, 1% THD, 1 channel at 4 Ohm: 900 W x 1
• Adjustable Crossover: No
• Input Type: Pre IN L/R (ABS)
• Outputs: Pre OUT (pre in bypass) L/R (ABS)
• Filter Pass A: High-pass & Low-pass stereo 45 / 55 / 65 / 80 Hz, 12 dB/Oct.
• Filter Pass B: Low-pass mono 45 / 55 / 65 / 80 Hz, 24 dB/Oct.
• Fuse: 100 A
• Other Functions: Demo mode ext. supply: 12 VDC, 600 mA; Ext. Cap terminals: 18 VDC cap min
• Weight: 15 kg
• Dimension A: 510 mm
• Dimension B: 85 mm
• Dimension C: 280 mm