Meyer Sound MM-10 Manuel d'utilisateur télécharger pdf (Page 17)

MM-10 OPERATING INSTRUCTIONS

Routing Two Inputs to Four Outputs Each

To route two Channel Inputs to four Channel Outputs each:

1. Set the Link 4 switch to OFF and all other Link switches

to ON.

Routing Eight Inputs to Eight Separate Outputs

To route eight Channel Inputs to eight separate Channel

Outputs:

■ Set all Link switches to OFF.

Input Impedance for Linked Channel Inputs

When a Link switch is enabled, the Channel Input’s unbuf-

fered source signal is transmitted in parallel to each linked

Channel Output. This causes the Channel Input’s imped-

ance (normally 10 kOhms for one MM-10XP) to be reduced

for each linked output. For example:

■ 1 Channel Output, 10 kOhm input impedance

■ 2 Channel Outputs, 5 kOhm input impedance

■ 4 Channel Outputs, 2500 ohms input impedance

■ 8 Channel Outputs, 1250 ohms input impedance

To avoid distortion when linking Channel Inputs, make sure

the source device can drive the total load impedance of the

linked MM-10XP subwoofers. The source device must be

capable of delivering a minimum of 16 dBV (6.3 V rms into

600 ohms) to yield the maximum peak SPL over the operat-

ing bandwidth of the subwoofer.

NOTE: Most source devices are capable of

driving loads no smaller than 10 times their

output impedance. To drive eight MM-10XPs linked

from a single Channel Input, the source device should

have an output impedance of approximately

100 ohms or less.

Channel Outputs

The MPS-488HP’s eight Channel Outputs deliver DC power

(48 V DC) and balanced audio to up to eight MM-10XPs. The

channel outputs can be equipped with either Phoenix 5-pin

male connectors (on the MPS-488HPp model) or EN3 5-pin

male connectors (on the MPS-488HPe model).

NOTE: For information on MM-10XP cable

requirements, see “MM-10XP Current Draw

and Cable Requirements” on page 13. For informa-

tion on cables and cable accessories available from

Meyer Sound, see Appendix A, “MM-10 Accesso-

ries.” For information on cable assembly, see

Appendix C, “Phoenix and EN3 Cable Assembly.”

TIP: A single composite cable (such as Belden

1502) wired for both DC power and balanced

audio can be used to connect MM-10XPs to Channel

Outputs.

CAUTION: When wiring cable connections for

the MPS-488HP channel outputs, it is

extremely important that each pin in the connector is

wired correctly. Make sure the 48 V DC from the

MPS-488HP is wired directly (and only) to the 48 V

DC pins on the MM-10XP connector, and that the

polarity is observed (negative to negative, positive to

positive) to avoid damage to the subwoofer. In addi-

tion, make sure the audio pins are wired correctly;

polarity reversals for audio signals will affect system

performance.

Link 1 Link 2 Link 3 Link 4 Link 5 Link 6 Link 7

On On On Off On On On

Link 1 Link 2 Link 3 Link 4 Link 5 Link 6 Link 7

Off Off Off Off Off Off Off

1 23 11554 5 678 1155

12 1 3 5 7456 8372468

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 55 56

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Meyer Sound MM-10 Manuel d'utilisateur Page 17

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