Roberts Radio 32-2054 owner manual 100%6+06*52#-45, 64/+0+0616#.52#-4 +/2%

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You can connect another MP-40 amplifier to this jack (shown on page 3) to double the size of your PA system. This lets you use up to four microphones and two turntables

(or two auxiliaries) sound sources.

Use a shielded cable with phono plugs at each end to connect the amplifier. Connect the cable between the two amplifiers’ MIX BUS jacks. For the best results, use the most appropriate cable length.

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You can connect one or more 4-, 8- or 16-ohm speakers to the amplifier, with or without transformers. To ensure equal volume from each speaker, all the connected speakers should have the same impedance rating.

Proper phasing is important when you use more than one speaker in the same room or area. Out-of-phase speakers can lose up to one-half of their potential volume, and can have a significantly decreased bass effect ±.

Most speaker terminals are color-coded or have a mark that indicates the terminal’s polarity. Usually, terminals with positive polarity are red or have a plus (+) symbol, and terminals with negative polarity are black or have a minus (-) symbol. Phasing is correct when you connect + to + and - to -.

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Before you connect speakers to the amplifier, you must determine the total speaker impedance. ￿

To determine total speaker impedance, you must first decide if you are connecting the speakers in series, parallel, or a series/parallel combination.

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Proper phasing occurs when speakers are set to allow sound to flow in the same direction.

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•A total speaker impedance higher than 16 ohms or lower than 4 ohms can damage your amplifier.

•When determining the total speaker impedance, first determine whether you are connecting the speakers in series, parallel, or a series/ parallel combination.

Connections

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