Discover the "Thesis HV venti," a 2-channel amplifier that will revolutionize the heart of your sound system. Manufactured by Audison, a leader in audio technology, this amplifier sets new standards in power and sound quality. With its uncompromising pursuit of maximum performance and a unique dual-mono design, the HV venti stands out from conventional amplifiers. Resistant to integrated circuits, it allows the sound carriers to operate at higher power and voltages for an unbeatable listening experience.

DUAL-MONO DESIGN

Four Synchro-PWM power supplies enable very fast transient response and create a dual-mono configuration.

MOSFET-BJT HYBRID CONFIGURATION

The HV venti uses a unique output stage topology with discrete IGBTs, consisting of two Hitachi DMOS devices driving two pairs of complementary Sanken Power BJTs, each rated for 30 A peak current and 200 W power dissipation.

CLASS A PREAMPLIFIER AND DRIVER

It consists of two groups, the front-end preamplifier and the control unit. The entire stage is symmetrical up to the driver outputs. The supply voltage is 90 V and is specific to this stage and the two separate channels. The separate 150 V power supply is thermally stabilized and biased in Class A. The input is symmetrical with the first stage, a complementary JFET differential, and the second stage, a complementary BJT differential. The voltage amplifier is a cascode amplifier with a buffer to drive the output stage.

SPECIFICATIONS

AMPLIFIER TECHNICAL DATA

• Channels: 2
• Amplifier Class: A-Class
• Hi Level Input: Yes
• Low Level Input: Yes
• Digital Input: No
• Supply Voltage / Fuse: 11 - 16 VDC
• Idle Current: 4.2 A
• Idle Current when Off: 0.006 mA
• Current Consumption @ 14.4 VDC, 2Ω, Max Music Power: 90 A
• Remote IN: 7 - 16 VDC - 1 mA

AMPLIFIER SECTION

• Distortion - THD @ 100 Hz, 4Ω, 70% Rated Power: <0.05%
• Bandwidth A (-3 dB, 2 VRMS, 4 Ω): 4Hz ÷ 75 kHz
• S/N ratio A (A weighted @1 V): 100 dB
• Damping Factor A (1kHz, 4 Ohms): 80
• Input Sensitivity: Pre-In Input sensitivity (high): 0.25 - 1.6 VRMS, Input sensitivity (low): 1 - 7 VRMS
• Total RMS Power: 1600 W
• Output Power (RMS) @14.4 VDC, 1% THD
• 2 Ch: 400 W x 2 (4Ω)
• 2 Ch: 800 W x 2 (2Ω)
• 1 Ch: 900 W x 1 (4Ω)
• Adjustable Crossover: No

INPUTS

• Input Type: Pre IN: L/R (ABS)
• Filters Outputs: Pre OUT (pre in bypass): L/R (ABS)
• Filter Pass A: Crossover frequencies High pass & Low pass stereo 45 - 55 - 65 - 80Hz, 12dB/oct.
• Filter Pass B: Crossover frequencies Lo-pass mono 45 - 55 - 65 - 80Hz, 24dB/oct.

OTHER

• Fuse: 100 A
• Other Functions: Demo mode ext. supply: 12 VDC - 600 mA ; Ext. Cap terminals: 18 VDC cap min
• Weight: 15 kg

DIMENSIONS

• Dimension A: 510 mm
• Dimension B: 85 mm
• Dimension C: 280 mm

FEATURES

• Exclusive IGBT (Insulated Gate Bipolar Transistor) circuit.
• A class preamplifier, intermediate stages, and driver.
• Dual-mono design with four power supplies in Synchro-PWM configuration.
• Made exclusively with discrete components.
• Signal switching is done exclusively with relays.
• Fully symmetrical input circuit.
• Power supply on a separate board to avoid interference.
• "Dual Power" function to switch between Hi-Current and Hi-Power.
• 'Bias Selector' function to change the percentage in Class A.
• High-quality crossover module included.
• 5 mm aluminum housing connecting two side cooling channels.