Rega Ios Reference - Manual (Page 9)

CARTRIDGE SELECTION
The IOS phono pre amplifier is not suitable for use with any Moving Magnet
(MM) cartridges, it can only be used with moving coil (MC) cartridges. The IOS
has been designed to work with most manufacturer’s moving coil (MC)
cartridges. There are five different input load settings, select the required load
to match to that specified by the cartridge manufacturer. The IOS has five
different DC resistance settings, 1-5. Note: It is permissible to try different
loading conditions and resistance settings as sometimes changing the load
gives a different sonic performance more suited to your personal taste. These
variables are explained in greater detail in the controls section of this manual.
Your Rega dealer will be able to give guidance to help match your specific
cartridge to the correct gain settings.
POWERING UP
IOS is activated by depressing the ON/OFF switch situated to the left of the
front panel. Power on is indicated by the REGA LOGO in the centre illuminating
red. It is recommended to activate the IOS before the power amplifiers
and deactivate after they have been switched off. After switching off, the
indicator will extinguish. Due to the nature of the circuit topology, there is a
short period immediately after switching on when the quiescent current has
not stabilised. This condition results in reduced output from the pre-amp. This
Rega amplifier circuit has been carefully designed to work with a minimal
“warm up” period. Some manufacturers and retailers may recommend leaving
amplifiers permanently switched on, Rega cannot condone such practise in
these environmentally sensitive times. We would recommend that your Rega
amplifier is always switched off after use. Full sound quality is attained after
less than ten minutes (a process speeded up by playing music)!
REGA LOGO ILLUMINATES RED WHEN THE UNIT IS POWERED ON.
ON/OFF SWITCH
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