Audison 1600W Total Power 2-Channel A-Class Amplifier - HVVENTI
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Amplifier | 1600 W total power | 2 x 800 W @ 2ohm | A-class
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.
FEATURES
- 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.
OVERVIEW
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.
TECHNOLOGIES
Hi-Res audio
According to the definition of HiRes audio provided by JAS (Japan Audio Society – jas-audio.or.jp), HV venti far exceed the above 40 kHz bandwith analog requirement, providing an astonishing 5 ÷ 75k Hz (@ -3 dB, 2 VRMS, 4 Ω).
MOSFET-BJT HYBRID CONFIGURATION
Unique output power stage topology, FUNCTION discrete IGBT, realized with a complementary pair of Hitachi DMOS driving two pair of complementary Sanken power BJT, each rated for 30A peak current and 200W dissipation.
DUAL POWER FUNCTION
A revolutionary function allowing the user to select the amplifiers output power configuration and the operating class.
DUAL MONO CONSTRUCTION
Four Synchro-PWM power supplies allow for a very fast transient current response and to create a Dual Mono configuration.
JFET DIFFERENTIAL STAGES
Fully balanced JFET differential preamplifier inputs with output buffer for control unit.
| AMPLIFIER TECH DATA | |
|---|---|
| Channels | 2 |
| Class | A-Class |
| Hi Level Input | Yes |
| Low Level Input | Yes |
| Digital Input | No |
| Power supply voltage / fuse | 11 ÷ 16 VDC |
| Idling current | 4.2 A |
| Idling current when off | 0.006 mA |
| Consumption @ 14.4 VDC, 2Ω, Max Musical Power | 90 A |
| Remote IN | 7 ÷ 16 VDC - 1 mA |
| AMPLIFIER STAGE | |
| 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 weighed @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 Power RMS | 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 Fucntions | 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 |