Music hall MPP user Manual

music hall

mpp

INSTRUCTION MANUAL

music hall

http://www.musichallaudio.com

In the past, all audio system control components (integrated amplifiers,
receivers and system pre-amplifiers) had phono inputs. As digital
mediums have become the primary source for most audio systems,
these special phono stage inputs have disappeared from the majority
of system control components. These phono inputs were different from
all other inputs because of the unique output signal from any phono
cartridge.

When a record is cut the bass is decreased and the treble increased
so that the full stereo signal can be stored within the grooves of a
record. The phono stage reverses this process by equalizing the signal
to restore flat full frequency response. Equally important is the need to
amplify the very small signal that comes from a phono cartridge, which
is many times smaller than the output from a CD player, tuner or tape
deck. A phono stage raises the output, or gain, so that it is equivalent
to the output levels of standard output components. In addition, there
are two types of phono cartridges: Moving Magnet (MM), typically high
output; or Moving Coil (MC), typically low output, which may need as
much as ten times the gain of a MM cartridge, unless described as a
high output moving coil.

The Pro-Ject Phono Box is a complete phono stage, providing the
necessary gain and equalization, that allows for the hook up of any MM
or MC cartridge to any available standard level input.

The gain of The Phono Box can be adjusted for either MM or MC
cartridges. Moving jumpers on the circuit board inside The Phono box
makes this adjustment. The Phono Box is configured for MM

cartridges at the factory, so if a MM or high output MC cartridge
is being used no changes to the settings are required.