If you want that your power amplifier works with 2
Ω
load impedances, you should
consult the speaker impedance curves that is going to connect and study each case in
particular. It is very advisable enable the power amplifier limiter, whenever it is working with
2
Ω
load impedances.
The ability to drive 2
Ω
load impedances is primarily intended to insure that the power
amplifier will never be pushed beyond its current limits when driving nominal 4
Ω
load im-
pedances that may reach a minimum of only 2
Ω
at some frequencies.
When the power amplifier is working in BRIDGE mode, the load impedance must be of
4
Ω
or higher, with the same consideration that in MONO or STEREO mode with 2
Ω
load
impedance. This is because in BRIDGE mode, it is as if each channel is driving with the half
load impedance.
MAINTENANCE
Periodically, and in a technical service, should clean the dust and dirt accumulated
inside the power amplifier, especially in the heatsinks, the fan and the cooling vents, with a
vacuum cleaner or with an air-compressor gun. The dirt diminishes considerably the capac-
ity of radiation and ventilation.
The input attenuators (potentiometers) are sensitive to the dust accumulated, and
therefore for they will be cleaned with an air compressor gun or be changed if they are very
wrong.
NOTE:
Equipos Europeos Electrónicos don't recommend the use of spray cleaners because
they could damage the lubricant layer of the potentiometers. Use compressed air to clean
them or replace with similar parts.
ALTAiR
PROFESSIONAL POWER AMPLIFIERS MF SERIES
18
