Audionet AMP II MAX Manual do Proprietário - Página 10
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Technical information
Construction
The AMP II MAX is designed as a dual-mono amplifier. SMD tech-
niques are used to optimize high-frequency characteristics. All signal
paths are reduced to minimum length. No 'evil' elements (like coupling
capacitors, coils, relays) are located in the signal path. The design is mag-
netically and capacitively optimized. Negative magnetic and electric in-
fluence and interaction between input, decoupling and power section are
reduced to a residual minimum.
Power supply
Control, decoupling and power sections have separated transformers and
rectifiers. Two main transformers (each with 1100 VA) drive four Sie-
mens electrolyte capacitors (33.000mF each) by Schottky diodes.
Circuitry
For the input section Audionet uses a low-noise, monolithic dual FET.
The gain-bandwidth product of the succeeding dual-stage differential
voltage amplifier exceeds 1 GHz. Input and output sections are decoupled
using 'bootstrapped' emitter followers. The output section is equipped
with power MOS-FETs.
Peak level meter
In order to determine the impulse peak level the AMP II MAX detects a
voltage maximum and measures the current flowing at that point of time.
By that, impedance critical loudspeakers are processed automatically and
according to that a higher peak level is displayed. You will get the exact
effective power. If no loudspeaker is connected, only a small measuring
error is displayed (e.g. 3.0W instead of 200W for a 4W-loudspeaker). The
current number is displayed for about 2 seconds if not replaced by a
higher peak level.
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