User manual
EXPERT 2K-FA
Pag. 22 of 22 Issue 2 – May 2011
7. POWER SUPPLY (PSU)
The power supply of the SPE Expert 2K-FA, unique in its category, is switching with a
PFC (Power Factor Correction) that allows a drastic reduction of the harmonic
components in the mains in accordance with IEC555-2, it consists of two separate
elements.
The first powers all the electronic circuits for command and control.
The second powers only the PA, its output voltages are 48 Vdc (MAX Pout), 35 VDC
(MID Pout), and 30 Vdc (LOW Pout).
This design was adopted as it provides maximum efficiency and therefore less heat to
dissipate.
The power supply meets the followings rules: UL60950-1, TUV EN60950-1, EN55022,
EN61000-3-2,-3, EN61000-4-2,3,4,5,6,8,11; ENV50204, EN5502.
Since the amplifier is sold all over the world, the power cord does not come with any
mains plug. Normally your SPE distributor will fit the plug appropriate to your domestic
supply network prior to purchase. Should it be necessary to rewire the plug due to
relocation in a different country, please seek advice from a qualified electrician.
To apply the plug (20 A minimum) proceed according with the following fig.
You should observe all precautions in accordance with national legislation.
The amplifier is supplied to a power supply that automatically adapts between 190 and
255 Vac. 47-63 Hz.
In case of "FATAL" alarm the power supply is blocked, to restore the linear set OFF for
about 30 seconds. via the rear switch, then back ON.
In order to reduce the noise, in “Operate” the speed of the fans is increased only during
the transmission time, while in “standby” they are stopped.