Audison thesisHV Description

Audison has always aimed at the highest quality. Every product is unique. It is designed and developed in order to join the very best worldwide production; its special features make it peerless. Sometimes, however, choices have to depend on technical reasons, on the fact the product must be easy to use, on market demands. The Thesis brand, which indicates absolute Hi-End audison products, aims at escaping this indisputable reality.
Thesis doesn't want to be a complete line of products, since only when Audison continuous research proves that something really special in terms of ideas, performances, materials may be created, can the development of a Thesis product begin.
If a product doesn't meet these "utmost" features, it will not be a Thesis, alltough it will sport the Audison breand, which always means top level performance.
Thesis is a direct link between audiophile designers and audiophile enthusiasts, who always, simply, look for the best in a common passion: listening to music.

• Innovative “Dual Power” function allows to configure the amplifier for two output power
sets: Hi Current or Hi Power.
• “Dual Bias” selectors permit to change Class A percentage and the amplifier related
idling current.
• Crossover module with selectable cut-off frequency provided as accessory. In order
to insert it, bypass module has to be removed, so that when the crossover isn’t used,signal path is minimized.
• Cooling system realized with heatsink, natural convection, and a pair of fans for each
heatsink side which let air flow within side cooling ducts.
• ASC (Amplifier Status Control): microprocessor based unit designed to manage every
amplifier operations. It shows amplifier temperature, protection and others importantinformation about its the status.
• Innovative output power stage topology, discrete IGBT, realized with a complementary
pair of Hitachi DMOS driving two pair of complementary Sanken power BJT, each ratedfor 30A peak current and 200W dissipation.
• Balanced Class A biased driver with separate 150V Flyback power supply.
• Thermally stabilized with central fan independent from the others on the side ducts.
• Fully balanced JFET differential input preamplifier with output buffer for control unit.
• ABS inputs and ABS bypass outputs, decoupled through two audio-grade polypropylene
capacitors per channel.
• Four Synchro-PWM power supplies allow to obtain very fast transient current response
and to realize Dual Mono configuration.
• Wide range of protections: power limiter in case of loudspeakers shortcircuit or overload,
over 90°C thermal protections, power output terminals shortcircuit to vehicle chassis,battery protection operating with voltage lower than 11V or higher than 16V, DC at outputterminals, power supply fuse.

Power Supply

Power supply voltage: 11 ÷ 16 VDC
Idling current when off: 0.006 mA
Minimum idling current: Hi Curr. Hi Pow.
Low BIAS 4.2A 5.6A
High BIAS 6.5A 10.4A
Consumption @ 13.8 VDC 90A(1Ω) 100A(2Ω)

Amplifier stage

Distortion - THD (1kHz): <0.05%
Distortion - IMD (IHF): <0.05%
Bandwidth (-3 dB): 4Hz ÷ 75 kHz
S/N Ratio (A weighed @1 V): 100 dB
Damping factor (1kHz, 4 Ohms): 80
Slew rate >20V/μs
Input sensitivity (high): 0.25 ÷ 1.6 VRMS
Input sensitivity (low): 1 ÷ 7 VRMS
Input impedance: 22 kΩ
Load impedance: Hi Curr. Hi Pow.
Stereo 4 - 2 - 1Ω 4 - 2Ω
Mono 4 - 2Ω 4Ω

Filters / inputs

Pre IN: L/R (ABS)
Pre OUT (pre in bypass): L/R (ABS)
Crossover frequencies High pass & Low pass stereo
45 - 55 - 65 - 80Hz, 12dB/oct.
Lo-pass mono
45 - 55 - 65 - 80Hz, 24dB/oct.

Other functions

Remote In: 7 ÷ 16 VDC - 1 mA
Demo mode ext. supply: 12 VDC - 600 mA
Cap terminals: 18 VDC cap min
Fuse (strip): 100 A