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.

MM setting: this setting should be used with ALL moving magnet

cartridges and any high output moving coil cartridge with a voltage
output of 1.5 mV or HIGHER. Please consult your cartridge manual,
looking on the specification page for the output voltage, or dealer for
this information.

MC setting: this setting should be used with all low output moving coil
cartridges (voltage output lower than 1.5 mV). Again, please consult
your cartridge manual, looking on the specification page for the output
voltage, or dealer for this information.

1. Remove the four screws on the side of The Phono Box and remove
the top cover.

2. Adjust the jumpers to match your cartridge as indicated in the
diagrams above.

3. Replace the top cover and screws.

With the Phono Box properly configured for the cartridge in use it can
be installed into the system, following the instructions on the next
page.

1. Connect the interconnect cables from the turntable to the left and
right inputs of The Phono Box, and attach the ground wire to the
terminal between the pairs of input and output jacks.

2. Connect a standard stereo interconnect between the output jacks of
The Phono Box and any unused input (variously labeled aux., tuner, or
tape) on the receiver, integrated amplifier or preamplifier.

3. Connect the power supply to The Phono Box, and then plug the
power supply to a wall outlet.

Troubleshooting

●

If no output is heard, check to make sure that all connections, both
signal and power, are properly made, and confirm that the selector
switch on the system control unit is set to the correct input.

●

Hum may be heard if the ground connector is not connected, or if the
unit is placed on or near the power supply of other components. Be
certain to connect the ground, and/or move The Phono Box to an
alternate position among the equipment to eliminate any hum.

●

Some users of cartridges at or slightly below 2.5 mV using the MM
gain setting may find that overall volume is too low, that the volume
knob must be positioned considerably higher than normal (where CD
volume normally would be, for example), or that the sound is a bit thin.
In these cases switching to the MC setting may prove beneficial.
However, this may provide more output than may be desired, so if any
distortion is heard, or if the range of volume available at the volume
control becomes severely limited, returning to the MM setting is
advised.

WARRANTY

This entitles you to have the music hall mpp repaired free of charge, at our
discretion, for one year after the date of purchase, at any authorized music hall
Service Center, provided the unit was purchased from an authorized dealer.
Your original sales receipt is proof of purchase date. music hall takes no
responsibility for defects arising from accident, misuse, abuse, wear and tear,
neglect or unauthorized repair and/or adjustment. music hall cannot accept
responsibility for damage or loss that occurs during transit.

The warranty does not cover transportation costs.
CLAIMS UNDER WARRANTY

The mpp should be packed in the original packing and returned to the dealer
from whom it was purchased, or, upon authorization, to a music hall Service
Center. It should be sent by a reputable carrier, carriage prepaid. Do not send
the turntable via USPS (United States Postal Service). Since no responsibility
will be accepted for a unit in transit to the dealer, customer, or authorized service
agent, customers are advised to insure against loss, damage, or theft.

FOR FURTHER INFORMATION CONTACT:

music hall
108 Station Road
Great Neck, NY 11023
Tel: [phone]
Fax: [phone]

http://www.musichallaudio.com