MUSEATEX MELIOR PHONO
The Melior phono
Center is designed to work with the Melior Control Center, Melior A/V Center,
or as a stand-alone unit. In the latter case, the Museatex Floating Charge power
supply (PP-100) will have to be purchased separately.
Whether used independently or in tandem with Melior Control Center, the Melior
Phono Center offers one of the best phono preamplifiers in the market today.
The Meitner PA6i is heralded as one of the best preamplifiers in the market
today and the phono stage of the PA6i is one of the contributing factors to
this high rating among audiophiles. The Melior Phono Center, designed and manufactured
by Museatex takes the performance a step further.
Please take the time to read this owner's manual so that you can optimize the
performance of your phono playback system.
- Universal Phono
Stage. The user adjustable, infinitely variable gain control accommodates
both moving coil and moving magnet cartridges.
- User Adjustable
Gain. Balanced line Trans -impedance Input allows for DC controlled gain setting.,
The 20 dB gain adjustment allows you to match your phono input to that of
your other line inputs.
Load Network. The user can adjust the loading of the phono center to match
- High Pass Rumble
Filter. This is user switchable and is automatically selected for a few seconds
when the gain control is activated.
- Class A Output
Stage. Up to 10 feet of interconnect can be driven by the phono center. This
allows you to place the phono center where it belongs - close to the phono
- Balanced or
Regular Input. If your turntable has been custom wired for balanced line output,
the phono center can also be wired for balanced line input. This arrangement
will improve performance and your present Melior Phono Center can be modified
at a nominal cost to accommodate balanced line input.
When you first
unpack the Melior Phono Center confirm that the following are included:
- The Phono Center
- Warranty Registration
- Quality Control
Contact your dealer
or Museatex directly if any of these are missing.
In handling the
Melior Phono Center, take care not to scratch or damage the wood side panels.
Keep the packing. The Melior Phono Center cannot be safely shipped without the
packing. It is important that the unit is examined carefully for any shipping
damage. If there is any damage, please contact your dealer. The original packing
showing the damage must be retained to institute any claim against the carrier.
the Melior Phono Center
- place the Melior
Phono Center as close to the turntable as possible.
- Ensure that
the Melior Control Center (or Power Supply) is turned off prior to making
- Connect output
terminals of your turntable to the input RCA jacks of the Melior Phono center
taking care to match the channels. The bottom jack marked "R" with
the red color code is the right channel and the top jack marked "L"
with the white color code is the left channel.
- Connect the
ground wire from the turntable to the ground post on the Melior Phono Center.
Make sure this connection is tight as this is one of the most common causes
for hum originating with the turntable.
- Now connect
the power cable to the Melior Control Center (or supply). The Melior Phono
Center has a cable with a male DIN plug at the back and this should be connected
to ;the DIN power out of the Melior Control Center. In the case of the Museatex
Independent Power Supply, the DIN input is located at the end of the cable.
- Turn the Gain
Control knob at the back of Melior phono Center to its lowest setting by turning
it counter-clockwise. Switch the Rumble Filter to the "on" position.
- Turn the Melior
Control Center (or supply) on.
- Ensure that
the connections from the control center to the amplifier are made in accordance
with the instructions supplied.
- Select the appropriate
line input on your control center or preamplifier. If you are using another
preamplifier, make sure that you use on of the line inputs rather than the
"phono" inputs. The Melior Phono Center is an RIAA equalized phono
pre-amplifier and if you connect the output from the Melior Phono Center to
the "phono" input of another pre-amplifier, you will hear severe
distortion caused by "double equalization".
- You are now
ready to make the gain adjustments to match your cartridge.
- Adjusting Input
Select your normal listening level by using another source, say the tuner,
and switch the input back to the phono section on your control center. Now
gradually turn the knob clockwise until the sound level is approximately at
the level of your other inputs. Your phono cartridge is now adjusted for playback
in your system.
- High Pass Rumble
The Melior Phono Center has a 2 pole high pass rumble filter to eliminate
infrasonic frequencies below 10 Hz which can cause speaker damage at high
volumes. This filter is "automatically" activated for a few seconds
when the gain switch is used. This is to prevent any unpleasant thumps when
gain adjustments are being made.
The toggle switch at the rear of the Melior Phono Center allows the user to
leave the filter permanently activated. We recommend that you activate the
filter when playing warped records.
Adjustments Inside the Melior Phono Center
The Melior Phono
Center is factory adjusted for 51 Kohms input impedance and 50pF input capacitance.
In some cases, it may be desirable to vary these settings to suit your cartridge.
In most cases, the cartridge manufacturers suggest ideal settings and we would
recommend that your use the recommended settings as a starting point. In our
experience, however, the optimum settings are often obtained by trial and error
as factors like cable impedance, length of cable used, tone arm wiring etc.
Our customer service
department may be able to help you in many instances as we have experimented
with many of the high quality cartridges in the market.
To gain access
to the adjustment pins, it is necessary to open the Melior Phono Center. The
loading adjustments are directly in the signal path, and any rotary type pots
accessible from the outside would contaminate the signal path. Please ensure
when making the adjustments, to use a clean pair of tweezers. Opening the control
center is a simple process and requires a small Phillips screw driver. Please
follow these steps:
- Unplug the Melior
Control Center from your Melior Control Center (or Power Supply).
- Using a clean
surface to work on (preferably felt or cloth covered to prevent damage to
the cosmetics of the unit), place the Melior Phono Center upside down and
remove the four Phillips screws at the bottom. Now remove the two screws at
the rear of the unit. These groups (from front to back) are:
- Input Capacitance
Adjustments. You will see a white sticker showing the values for each
set of pins with a black jumper factory set at the 50 pF marking. There are
five pairs of settings from 50 to 250 pF.
- Input Impedance
Adjustments: The white stickers show values from 100 ohms to 51 Kohms.
The factory setting is at 51 Kohms.
- Jumpers for
converting to balanced line inputs: These require some rewiring and a
change of the rear panel. We recommend that you have this change done at the
- With tweezers,
remove the black jumpers and position them in the appropriate pins ensuring
that the same values are used for each channel.
- If you do not
wish to experiment any further, close the unit by placing the cover back and
inserting all 6 screws and tightening them. Follow installation procedures
as already explained. Remember not to turn the power on until all the connections
- If you wish
to experiment and optimize the settings, leave the cover off and try different
combinations. Careful listening with different types of music is recommended
prior to selecting the optimum settings. Whenever accessing the adjustment
jumpers, the power, inputs and outputs must be disconnected. Failure to follow
this precaution could result in damage to this unit, the preamplifier or the
In addition to
the user adjustments described above, the Melior Phono Center has provisions
for special factory modifications. The two adjustments offered are:
- Balanced line
- Increasing gain
by an additional 10 dB to accommodate a few moving coil cartridges that have
very low output.
your dealer for the cost of these modifications.
Pure copper printed circuit board - no tin plating.
- Power Supply:
External. Either in tandem with Melior Control Center, A/V Center, or Museatex
PP-100 Power Supply.
- Inputs: One
Phono Input. Variable gain. MM or MC.
- Outputs: One
stereo line-level output.
- Output Impedance:
- Signal to Noise
Ratio: MC: Typically 80 to 90 dB (A WTD), MM: Typically 85 to 100 dB (A WTD).
- RIAA Accuracy:
0.2 dB - RIAA timing capacitors are charge-biased. Left/Right match: 1%.
- Gain: 20 dB
from +30 dB to +50 dB.
- Filter: 2 Pole
High Pass Rumble Filter at 10 Hz.
more information please contact John Wright at (403) 968-1400 or email firstname.lastname@example.org