MOUNTING REQUIREMENTS
MUSICA volume control units are slightly taller, wider, and deeper than most volume controls. Use of a low voltage mounting bracket or a 22.5 cu. in. E.O. box with a minimum
inside depth of 2.75” and a minimum inside height of 2.985” is recommended.
CALCULATING THE PROPER IMPEDANCE SETTINGS FOR THE SYSTEM
The MUSICA volume control is an
To determine which setting should be used (1X, 2X, 4X, and 8X) you will need to know the number of loudspeaker pairs, the loudspeaker impedance, and the load capability (output impedance) of the amplifier. Most amplifiers will handle a load down to four or two ohms with some going as low as 1 ohm.
Using the chart on page one; cross reference the number of loudspeaker pairs to the amplifier impedance. Notice that the 4X jumper setting will allow twice as many loudspeaker
pairs.
EXAMPLE
If you have 8 pairs of 8 ohm loudspeakers and an amplifier capable of handling a 4 ohm load you must set the volume control at the 4X setting for the amplifier to drive all 8 pairs of speakers at full volume. Note that the 2X setting allows only 4 pairs of 8 ohm loudspeakers to operate on a 4 ohm load. If however, you could select an amplifier with a 2 ohm output impedance, the same 8 loudspeakers could operate on a 2 ohm load (at the 2X setting) or 16 loudspeaker pairs (at the 4X setting). Whenever possible, the lowest jumper setting for a given amplifier should be selected.
IMPEDANCE JUMPER SETTINGS
REQUIRED | MAX. QTY. 8 OHM | MAX. QTY. 4 OHM | |||||||
AMPLIFIER | LOUDSPEAKER PAIRS | LOUDSPEAKER PAIRS | |||||||
OUTPUT | JUMPER SETTING | JUMPER SETTING | |||||||
IMPEDANCE | @1X @2X @4X @8X | @1X @2X @4X @8X |
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8 OHM | 1 | 2 | 4 | 8 | 0 | 1 | 2 | 4 |
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4 OHM | 2 | 4 | 8 | 16 | 1 | 2 | 4 | 8 |
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2 OHM | 4 | 8 | 16 | 32 | 2 | 4 | 8 | 16 |
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1 OHM | 8 | 16 | 32 | 64 | 4 | 8 | 16 | 32 |
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CHANGING IMPEDANCE JUMPERS
Once the proper impedance setting is determined, locate the impedance jumpers (black plastic modules) on the back side of the circuit board. One jumper is for the right channel, the other for the left. Next, locate the 1X, 2X, 4X and 8X settings on the circuit board for each channel. If the settings are correct, continue to the next step. If the settings need to change, simply slide the jumper modules off and reinstall them on to the correct two pins.
LIMITATIONS
The MUSICA volume control limits the degree of impedance matching to eight times so that music quality and overall performance is not sacrificed. We do not recommend that any quality,
DESCRIPCIÓN GENERAL
El control de volumen MUSICA es un dispositivo de 8 ohmios con una placa decorativa de pared. Este control permite reproducir música estéreo nítida y sin distorsiones cuando se conectan uno o varios pares de altavoces a un solo amplificador.
La respuesta de frecuencias es de 20 Hz a 20 kHz
La perilla de control mide 1 1/4 de plg. de diámetro y sobresale sólo 11/16 de plg., lo cual permite operarlo de manera discreta, pero funcional. Las unidades miden 2 11/16 de plg. de profundidad y se pueden usar con un soporte de montaje de bajo voltaje o una caja E.O. estándar de 22.5 pulgadas cúbicas (no suministrada). Cada control de volumen tiene piezas plásticas correspondientes de color blanco. Estas piezas son la placa, la perilla y el ribete.
ESPECIFICACIONES
Procesamiento de potencia |
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| 50 Vatios | |||||||
Impedancia |
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| 8 Ohmios | |||||||
Respuesta de frecuencias |
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| 20 Hz a 20 kHz | |||||||
Pérdida de inserción |
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| 0.5 dB | |||||||
Tipo |
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| estéreo | |||||||
Pasos |
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| 6 de 3 dB | |||||||
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| 3 de 6 dB | ||||||
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| 1 de 9 dB | ||||||
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| 1 de 28 dB | ||||||
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| VISTA SUPERIOR | ||||||||
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| 43.2mm |
32.6mm |
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| VISTA LATERAL | ||||
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105mm |
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| 74mm | |
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| 66mm |
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| 68.5mm | ||||
