APart MA60 [11/28] Instruction manual ma30 ma60

Instruction manualMA30 - MA60

IMPORTANT!

This ampliﬁer relies on convectional cooling. In normal situations,

overheating will not occur due to the class-D ampliﬁer topology.

Since there are no cooling fans in the ampliﬁer, make sure the

convectional cooling system can work properly. The unit can be

built in a 19 inch rack system using the included 19 inch brackets,

but the ventilation holes should never be blocked. Therefore, it is

absolutely necessary to allow at least one free rack space or 44 mm

above the ampliﬁer.

Make sure the ambient temperature is between 0 and 35°C.

Operating the unit beyond its normal limits may cause overheating.

If necessary, use a forced ventilation system in your mounting rack

when the rack holds multiple ampliﬁers.

The mains fuse is located in the mains inlet. When the fuse is

broken, replace it with a fuse of the same current and voltage

rating:

- MA30: T 1 AL / 250 V

- MA60: T 1.6 AL / 250 V.

For qualiﬁed personnel only!

Before using the ampliﬁer for the ﬁrst time, check the total

impedance of your speaker lines using an impedance meter:

temporarily disconnect the speaker line from the ampliﬁer and

measure the speaker line. Minimum load impedance @ 100 volt

must be 167 ohms or more (MA60) or 333 ohms or more (MA30).

These values correspond to 60 and 30 watts @ 100 volt.