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9 Technical information
9.1 Design
To optimize the high frequency properties the circuitry was consequently
miniaturized and SMD technology implemented. Signal path ways are
limited to a minimum length and contain no componets harmful to the
quality of sound like coupling capacitors, coils or relays. The construc-
tion is optimized magnetically and capacitively. Influences of interfer-
ences and interaction between amplifier stages are extensively ruled out.
The signal cables are made of pure silver and gold metallurgy.
9.2 Circuitry
The input stage is designed as a double differential amplifier with a low-
noise monolithic double-FET. The gain-bandwidth product of the input
stage is greater than 1 GHz. Double-boot-strapping decouples the input
from the power stage. The power stage consists of four Power-
MOSFETs. A complex correction circuit locally compensates distortion
in real-time.
9.3 Power supply
Each amplifier module has its separate power supply with a toroid trans-
former with a power of 600 VA. Shottky rectifiers drive six high current
capacitors with a capacity of 49,200
m
F for each channel resulting in a
total capacity of almost 345,000
m
F for an AMP VII equipped with 7
channels.
9.4 Handling
The microprocessor controls all functions and constantly monitors DC
level, high frequency, temperature and overload and switches off the
AMP VII from mains in case an error is detected. The display issues error
messages in plain text. Automatic power on/off is provided via the
Audionet Link interface. User configurable inputs are switched by gold
plated high precision relays.
Summary of Contents for AMP VII
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