Audison Thesis HV Venti Amplifier Class A 2 Channel Dual Mono Amp 1600w RMS

HV venti

Amplifier | 1600 W total power | 2 x 800 W @ 2ohm | A-class

"The Amplifier"

Absolute lack of compromise in achieving maximum performance is the mantra followed by the Audison R&D for the HV venti, a project with unique features. The total void of integrated operational circuitry allowed the engineers to work at higher voltages and with a Class biasing of the intermediate stages.

• Exclusive circuitry IGBT (Insulated Gate Bipolar Transistor).
• A Class preamplifier, intermediate stages and drivers.
• Dual Mono construction featuring four power supplies in Synchro-PWM
• configuration.
• Made exclusively with discrete components.
• Signal switching made exclusively with relays.
• Fully balanced input circuit.
• Power supply on separate board to eliminate interference.
• Dual Power’ function to switch between Hi-Current and Hi-Power.
• Bias Selector’ function to change the percentage in A Class.
• High quality crossover module supplied.
• 5 mm aluminium chassis connecting two side cooling ducts.

DUAL MONO CONSTRUCTION

Four Synchro-PWM power supplies allow a very fast transient current response and create a Dual Mono configuration.

MOSFET-BJT HYBRID CONFIGURATION

HV venti employs a unique output power stage topology, discrete IGBT, made by two Hitachi DMOS driving two pairs of complementary Sanken power BJT, each rated for 30A peak current and 200 W dissipation.

A-CLASS PREAMPLIFIER AND DRIVER

It is made of two groups, Front End pre-amplifier and control unit. The whole stage is balanced up to the driver outputs. The power supply voltage is 90 V and is specific for this stage and dedicated to the two separate channels. The separate 150 V power supply is thermally stabilized and A Class biasing. Input is balanced with the first stage, complementary JFET differential and the second stage, complementary BJT differential. The voltage amplifier is Cascode type with a buffer to drive the output stage.