Meyer Sound MPS-488HP Manual Do Utilizador

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Ultimate Short-Term Peak Current — A rating for fast-
reacting magnetic breakers.

■

Inrush Current — The spike of initial current encoun-
tered when powering on.

You can use the following table as a guide for selecting 
cable gauges and circuit breaker ratings for the system’s 
operating voltage.

The minimum electrical service amperage required by an 
MM-10AC subwoofer system is the sum of the Maximum 
Long-Term Continuous Current for each unit. An additional 
30 percent above the minimum amperage is recommended 
to prevent peak voltage drops at the service entry.

For the best performance, the AC cable 

voltage drop should not exceed 10 V, or 

10 percent at 115 V and 5 percent at 230 V. Make 
sure that even with AC voltage drops that the AC 
voltage always remains within the operating window.

Pay close attention to these important electrical and safety 
issues.

■

The MM-10AC requires a grounded outlet. Always use a 
grounded outlet and plug.

■

Do not use a ground-lifting adapter or cut the AC cable 
ground pin.

■

Do not exceed the current capability of the 20-amp AC 
Input connector for the MM-10AC. When looping 
MM-10ACs, consider the total current draw for all units 
on the circuit, including the first.

■

Make sure the AC power cable for the MM-10AC has the 
appropriate power plug (on the other end) for the area in 
which you will operate the unit. In addition, the AC power 
cable must be rated for the total current draw of all 
MM-10ACs looped from the power source.

■

Do not operate the unit if the power cable is frayed or 
broken.

■

Keep all liquids away from the MM-10AC to avoid haz-
ards from electrical shock.

The MM-10AC includes an XLR female Audio In connector 
and XLR male Audio Loop Out connector.

The XLR female Audio In connector accepts balanced audio 
signals with an input impedance of 10 kOhm. The connector 
uses the following wiring:

■

Pin 1 — 220 kOhm to chassis and earth ground (ESD 
clamped)

■

Pin 2 — Signal (+)

Idle Current

0.13 A rms

0.13 A rms

0.14 A rms

Maximum Long-Term 
Continuous Current

0.40 A rms

0.25 A rms

0.46 A rms

Burst Current

0.9 A rms

0.4 A rms

1.1 A rms

Ultimate Short-Term 
Peak Current

2.0 A peak

1.4 A peak

2.3 A peak

Inrush Current

4.0 A peak

2.4 A peak

4.0 A peak

Earth ground

Chassis ground