MELIOR ACC (Analog Control Center)

Overview | Features | Unpacking | Setup | Variations | Operation | Panel Display | Panel Control | Remote Control | Programming | Specifications


Thank you for purchasing the Melior Analog Control Center.

The Melior Control Center represents the next generation in high definition musical reproduction. It combines the elegance of functional versatility with a sophisticated rendering of music's subtle nuances. It allows you, the owner, to possess the highest level of control flexibility while retaining the ultimate in listening quality.
Museatex Audio now produces the Meitner PA6i preamplifier, heralded as one of the best preamplifiers in the world. The Melior Control Center, designed by Ed Meitner, and manufactured by the same craftsmen who build the Meitner series retains this high level of performance, yet is intended for those requiring more inputs and switching flexibility.
Please take the time to read this manual so that you can enjoy all of the features of your Control Center.



When you first unpack the Melior Control Center, confirm that the following are included:

Contact your dealer if any of the items are missing.
Remove all parts from the packing. In handling the Control Center, take care not to mar or scratch the wood side panels or acrylic top. Replace the packing materials in the shipping carton. Remove the protective self adhesive covering on the acrylic top only after the unit is installed. This will protect the top from damage during the installation.
Keep the Packing. Be sure to keep the shipping carton complete with the packing materials in the event the unit must be re-shipped. The Control Center can't be shipped safely without correct packing.
Shipping Damage. It is important that the unit be examined carefully for any shipping damage. If there is any indication of damage, please contact your dealer. It is important that the packaging be retained to institute any claim against the carrier.

Connecting the Control Center

Place the Control Center where it will be used. The AC cord can be plugged into the wall AC outlet. The LCD display will now be lit.

A Cautionary Note

When connecting an input or an output ensure that the following conditions are observed:

  1. the source component is not on and playing
  2. the input that you are making the connection to is not selected for listening.
  3. the amplifier is turned off

Your attention to the above conditions may prevent loud noises or speaker damage when connecting an audio system.
Any source components that you wish to use, whether it be CD player, tape deck, tuner or the audio signal from a VCR or LaserDisc player, can be connected to the pairs of inputs numbered 1 through 8 on the rear panel of the Control Center. Be sure to observe correct left and right channel orientation when making connections. On the rear panel of the Control Center you will see the top row of inputs labeled as left channel and the bottom row labeled as right channel. Your source components will either be labeled in a similar fashion, or color coded with red as right channel and black as left channel, or both.
The Control Center is unlike conventional preamplifiers in that there are no names given to the inputs that describe what type of source component to be connected to it. Instead, you have the freedom to connect your sources to whichever inputs you choose. Later, in the section about programming the Control Center, we will describe how you can assign names to the inputs according to the components you've connected.
Make note of which source components you've connected and the input number each is connected to. Later you will use this information to program the front panel display so it will remember your choices.

Connection of Tape Decks

When you are connecting a tape deck that has both inputs and outputs, bear in mind that an output on the tape machine has to connect to an input on the Control Center. The input of the tape player would connect to one of the pairs of tape outputs on the Control Center. On a tape unit "input" often corresponds to "record", and "output" corresponds to "play". If in doubt consult the owner's manual for your tape deck. If you don't get any sound when you play a tape you may have your connections reversed. Correct the situation and everything should work properly.

Use of Tape Outputs

When a source, for example, a CD player connected to input 1, is selected as the source to record (it shows up on the front panel display as R: - the input being recorded), this source signal is present at all four pairs of tape outputs. This is the signal that will go to whatever is connected to any of the pairs of tape outputs.
CAUTION: When connecting a tape deck that will be used for both record and playback, it is vital that inputs 5 through 8 be used for the play outputs of the machine, and that the TAPE OUTPUT of the same number be used as for the RECORD IN of the deck.
In the event that the tape deck is accidentally selected as the source to record from, this guarantees that a feedback loop cannot be set up that could damage the system.

Connection of the Melior Phono Center

If you also have the companion Phono Center, you can connect this to the input of your choice. Please follow the instructions for that unit when using it. The power cord with the DIN plug can be connected to the corresponding receptacle at the back of the Control Center.

Connecting Amplifiers

Single Amplifier Use

One or both of the two pairs of main outputs are intended to be connected to the inputs of one or more amplifiers. Main output pair number 1 are normal signal polarity. These should be used initially when you are using only one pair of outputs to connect either one stereo amplifier (or one pair of non amplifiers).

There are two recommended methods of using the Control Center to drive a bi-amplified (two stereo amplifiers; or two pairs of mono amps, or any similar configuration) system.

  1. Use Y adapters to convert output pair number one to two pairs. A high quality splitter cable accessory can be used to get two pairs of outputs from one pair on the Control Center. This option avoids the need to compensate for polarity reversal at the speaker connection end.
  2. Invert Polarity of Speaker Cables. Use the two pair of Main Outputs to connect to the amplifier inputs in a conventional manner. Connect both right channel outputs to right channel inputs on the amplifiers, and correspondingly for the left channel. Since Main Output Number 2 is phase-inverting, you must now compensate for this by changing the polarity of the speaker connections to the amplifier fed by Outputs Number 2. At this amplifier's speaker terminals, reverse positive and negative. This will leave you with positive of the amplifier connected to negative of the speaker, and vice versa.
    Your system will now operate correctly.

Special Applications

Making Use of Output Pair 2 - Reversed Phase
Main output pair Number 2 inverts the signal phase, otherwise known as polarity. These therefore present some versatile options in system connection. These reversed polarity outputs can be used to achieve one of the following conditions:

  1. Reverse phase, for more detailed sound if your system benefits from it. While the subject of absolute phase is beyond the scope of an owner's manual, you can usually form a preference by listening to both options and using the one that sounds best to you.
  2. Enhanced performance from stereo amplifiers.
  3. Amplifier bridging: you can connect two stereo amplifiers in such a way that each amplifier operates as a much more powerful mono amplifier.

Optimizing Stereo Amplifiers Stereo amplifiers which use shared transformers or complete power supplies for both left and right channels can benefit from the use of one normal phase and one reversed phase output.
Example: Connect Main Output 1, right channel, to the right channel input of the amplifier.
Connect Main Output 2, left channel, to the left channel input of the amplifier. At the input terminals for the left speaker, reverse the connection of the positive and negative cables. Now you will have positive from the amplifier connected to negative of the speaker, and negative from the amplifier connected to positive of the speaker. Do this for the left channel only. Connect the right speaker normally.

Because the phase of the signal and therefore the demands of the amplifier on its power supply are now 180 degrees opposite to each other, the power supply will provide peak power much more easily. The result is better sound with greater ease and wider dynamics. Note: This technique will work with stereo amplifiers only. It will not work with mono chassis amplifiers where the two channels do not share a common power supply.

Amplifier Bridging A stereo amplifier is said to be bridged when its two channels are combined in such a way that they make one channel of substantially higher power. Often, this is an effective way to upgrade the performance of your system without having to make a change from your present amplifier. If you're happy with it, you simply add a second one, assuming you have a means of bridging them. (If your speakers permit bi-amplification, bridging is seldom necessary.) With the Control Center, you can now bridge virtually any stereo amplifier to a higher powered mono one.

The Front Panel Display One of the most visible of the Control Center's features is the Liquid Crystal Display found on the left side of the front panel. This display provides you with a visual readout of the operating status of the unit at all times. By using the remote control you can view any of three different types of displays:

  1. General Status Display
  2. Expanded Status Displays
  3. Programming displays

The different displays and their uses are explained in the following section.

This is the default display that appears when the unit is first turned on, or when you leave any of the other display modes.

How to Read the General Status Display
M: The input you are presently monitoring, i.e. listening to. This is the signal that goes to the main outputs.
R: the input you are recording from. This is the signal that goes to the record outputs.
V: volume. This gives a numerical indication of the volume level. The scale is 0 to 127.
B: balance. This indicates balance changes in .5 dB increments, although the actual "steps" of audible changes are much finer. An arrow points either to the left or the right to indicate which channel is the louder.
If the balance is set to center the display reads "CNTR".

How the Display Shows Status of Processor Loop

The message "LOOP IN" will display at all times when the processor loop is engaged. If the processor loop is not engaged, the message "LOOP OUT" will appear for a few seconds and then disappear. To avoid clutter of the display the status of the processor loop is only seen when the loop is engaged.

Expanded Status Displays

There are four "Status" screens which you can view. In this expanded mode the information uses the full area of display, therefore is readable from a grater distance than is the case with the General Status Display.

The four Status screens appear as a series, one after the other, and can be seen by pushing the "STAT" button on the remote transmitter. You must be in the General Status mode to proceed to the Expanded Status Displays.

Using the Control Center

The Control Center is designed to be operated from either the front panel or by the remote control. The most basic and important operations can be performed by pressing the center of the areas on the front panel defined by grey boxes.

Front Panel Controls

The Remote Control

The buttons on the remote control transmitter are organized into three categories. Each of these categories relates to the type of operation to be performed:

  1. Principal Operations: these are the standard operations that you would use frequently such as VOLUME, BALANCE, MUTE, LOOP, STAT, REC and ON/OFF.
  2. Programming: the functions related to programming the display in order to assign names to inputs; also to preset volume and balance levels which can then be called by the listener from the remote control. Keys used are PROGRAM, V&B (volume and balance) and STORE.
  3. Selection of Volume & Balance Presets: the V&B (volume and balance) keys, when used in conjunction with the numbered keys, allow you to select one of four preset volume & balance levels for each input.

Performing Principal Operations

Principal operations refer to the every day functions that you would use repeatedly in the normal course of listening to music. It is not necessary to program input names nor to set preset volume and balance levels to perform these operations.

Performing Programming Operations

Unlike most of the functions described in the section on Principal Operations, Programming Operations must be performed from the remote control. These functions are generally used only once when you first set up your unit, or infrequently.

Protection Circuitry

As with other Museatex products, the Control Center features sophisticated protection circuitry that will guard against component or system damage as a result of DC offset errors.
If the Control Center recognizes an unusually high level of DC offset at one of its inputs, it will alert the user by going into a protection mode. The sound will be muted; the display for MUTE will flash. You will still be able to select another input. If the problem is caused by the source component connected to the input in use, you will be able to use one of the other inputs normally. If this is the case, the source component in question should be checked by a qualified service technician or its manufacturer. If selecting another input does not remedy the problem, contact your dealer or Museatex for additional service instructions.

Recommended Cables

The output characteristics of the Melior Control Center have been optimized to take advantage of the superior electrical transmission properties of Museatex interconnecting cables.

With the pairing of the Control Center and Museatex cables, the result will be an accurate transmission line for the musical signal. The frequency balance and phase characteristics will be optimized, as a result of the advantages of correct matching. While the Melior components will work normally with most makes of high quality cables, you should achieve the best sound by using Museatex cables. Consult you Museatex dealer or call us directly for details.




For more information please contact John Wright at (403) 968-1400 or email john@museatex.com