From Audison’s website : https://www.audison.eu/products/thesis-hv-venti/

Thesis HV venti was born with a unique target, to be the best amplifier in the world!

It represents the maximum expression of the Audison R&D staff, who have pushed themselves beyond the absolute without any brakes, looking for the perfect sound parameteres.

HV venti is a stereo Dual Mono amplifier realized according to absolute Hi End parameters. Four power supplies, low feedback, high bias current: these are only some of the adopted solutions to obtain reference performances.

Through the developing of HV venti project many technological innovations were introduced in audio field. Dual Power lets you set up final stage in two output power configurations, Hi Current or Hi Power. This function permits total conformation to loudspeakers impedance and power handling specifications.

The preamplifier PCB is able to dissipate the heat generated by the active devices while keeping their working temperature at the same level and positively affecting sound. In order to let you admire the masterpiece Audison designers created the electronics is covered by a special tempered scratchproof glass and it is lighted by several white, red and blue leds positioned in strategic spots.

The amp is like new, in the box with all accessories including additional crossover boards in the box

New Price is $15 000

https://www.safeandsoundhq.com/products/audison-hv-venti-thesis-two-channel-stereo-amplifier

https://studioincar.co.uk/products/audison-thesis-hv-venti-amplifier

Technical Features

1. Exclusive circuitry IGBT (Insulated Gate Bipolar Transistor).
2. A Class preamplifier, intermediate stages and drivers.
3. Dual Mono construction featuring four power supplies in Synchro-PWM
configuration.
4. Made exclusively with discrete components.
5. Signal switching made exclusively with relays.
6. Fully balanced input circuit.
7. Power supply on separate board to eliminate interference.
8. ‘Dual Power’ function to switch between Hi-Current and Hi-Power.
9. ‘Bias Selector’ function to change the percentage in A Class.
10. High quality crossover module supplied.
11. 5 mm aluminium chassis connecting two side cooling ducts.

Built-in fuses:

• Main fuse (strip fuse): 100A
• For Hi Current configuration fuses are built-in (blade mini-fuses): 4 x 15A
• For Hi Power configuration fuses are supplied (blade mini-fuses): 4 x 10A

Controls:

• Inputs (IN MODE) – PRE ON/OFF: Balanced / Unbalanced
• Output (OUT MODE) – PRE ON/OFF: Mono / Stereo
• L / R Alignment – PRE ON: +3dB Right / +3dB
• Left Sensitivity Ranges – PRE ON: High / Low
• Sensitivity Control – PRE ON: High range: 0.25 ÷ 1.5V RMS / Low range: 1.0 ÷ 6.0V RMS

More features:

• Dual power configurations: Hi Power / Hi Current check
• Cooling system progressive start-up and speed control (every channel)
• Optimum listening temperature indicator
• Left and right VUmeter
• Left and right peak distortion indicators

Protection:

• Power limiting circuit in case of overload or speakers short circuit
• Thermal (90°C / 194°F)
• Cooling fans failure
• Short circuit between cables, speakers and chassis
• Battery power supply lower than 11V or higher than 16V
• Direct current in the output

Power Supply

• Voltage: 11 ÷ 16 VDC
• Remote IN: 7 ÷ 16 VDC – 1mA
• Idling current when off: 0.006 mA
• Minimum idling current
• Low BIAS:(Hi Current) 4.2A / (Hi Power) 5.6A
• High BIAS: (Hi Current) 6.5A / (Hi Power) 10.4A
• Consumption @ 13.8 VDC (Max. musical power): (Hi Current – 1 ohm) 90A / (Hi Power – 2 ohms) 100A

Amplifier Stage

• Distortion – THD (1 kHz): <0.05%
• Distortion – IMD (IHF: 90% of max. power): <0.05%
• Bandwidth (-3dB): 4Hz ÷ 75kHz
• Damping Factor (1 kHz, 4 ohms): 80
• Slew Rate: > 20 Volts
• S/N ratio (A weighed @ 1V): (PRE ON) 103 dB / (PRE OFF) 108dB
• Input Sensitivity
• SENSITIVITY switch on High: (PRE ON) 0.25 ÷ 1.5 VRMS / (PRE OFF) 1.4V RMS
• SENSITIVITY switch on Low: (PRE ON) 1.0 ÷ 6.0 VRMS/ (PRE OFF) 1.4V RMS
• Input impedance: (PRE ON) 15k ohms/ (PRE OFF) 100k ohms
• Load impedance:
• Stereo: (Hi Current) 4 – 2 – 1 ohms / (Hi Power) 4 – 2 ohms
• Mono: (Hi Current) 4 – 2 ohms / (Hi Power) 4 ohms
• Output power (RMS) @ 13.8V (THD 1%:
  • Load (Dual Power):
  • 2 CH into 4 Ohms: 200W + 200W (Hi Current) / 400W + 400W (Hi Power)
  • 2 CH into 2 Ohms: 400W + 400W (Hi Current) / 800W + 800W (Hi Power)
  • 2 CH into 1 Ohms: 650W + 650W (Hi Current)
  • Mono into 4 Ohms: 800W (Hi Current) / 1600W (Hi Power)
  • Mono into 2 Ohms: 1300W (Hi Current)

Input and Filters

• Pre In: L/R (ABS connectors)
• Pre Out (Pre In bypass): L/R (ABS connectors)
• Crossover frequencies (factory optional module): 12dB stereo Hi pass and Lo pass ( 45 – 55 – 65 – 80 Hz ) 24dB mono Lo pass ( 45 – 55 – 65 – 80 Hz )