AMC 2445 manual Ac Line Cord, 2. 2CH/4CH MODE SWITCHES, Inputs, Input Level Controls

1. AC LINE CORD.

Plag the AC line cord into a nearby wall outlet that provides the correct AC power line voltage, or into a convenience outlet on any AMC product.

2. 2CH/4CH "MODE" SWITCHES.

There are two slide switches on the back panel labelled "2CH 4CH". These switches allow the 2445/2445a to opreated in several modes depending on the number of loudspeakers to be connected. These modes of operation are defined as follows;- 2 CHANNEL MODE. With both switches in the 2CH. position, the 2445/2445a becomes a two channel (stereo) amplifier capable of driving two 8 ohm loudspeakers at 90 watts per channel. In this mode, the 2445/2445a can be used as a high power, audiophile quality, stereo power amplifier.

CAUTION: In the 2CH. mode, the speaker terminals should be directly wired to the loudspeaker and not to any accessory device like headphones adaptors etc. That may share a common ground with other channels.

4 CHANNEL MODE. With both switches in the 4CH. position, the 2445/2445a becomes a four channel amplifier capable of driving four 4 ohm loudspeakers at greater than 45 watts per channel. In this mode, the 2445/2445a can be used for Dolby surround sound systems and multi- room type applications.

3. INPUTS.

There are four RCA photo connectors on the back panel that connect to the inputs of each of the four power amplifiers. Connections to these inputs are made with reference to the MODE SWITCH settings described above;-

2 CHANNEL MODE. Connections for the left channel input can be made via CH3 RCA input connector and for the right channel input, use the input connector of CH1.

NOTE: In this mode, the input photo

connectors of CH2 and CH4 are disconnected.

4 CHANNEL MODE. In this mode, the 2445/2445a opreates as a 4 channel amplifier. Connections to the inputs of these amplifiers are made through the RCA phono connectors of CH1 through 4.

4. INPUT LEVEL CONTROLS.

Each channel of the 2445/2445a has its own, independant level control. Before turning on the 2445/2445a for the first time, make sure that all level controls are set to their fully clockwise position. These controls can be used for various functions. For example, they can be used to match the levels of loudspeakers in a multi-room installation, or to lower the sensitivity of the power amplifier, so that the volume control on the pre-amplifier is at a more convenient and usable position. They can also be used to optimise the balance in a stereo system. NOTE: In the 2 channel mode, only the input levelcontrols of CH1 and CH3 are operative. The controls for CH2 and CH4 are switched out of circuit.

5. CONVENIENCE AC OUTLETS.

There are 2 switched AC outlets and one unswitched outlet on the back panel of 120V versions of the 2445/2445a. For 220V/230V/240V version. there is only one unswitched AC outlet. These outlets can be used to provide AC power for other audio or video components.

6. LOUDSPEAKERS TERMINALS

The 2445/2445a is equipped with binding post type speaker terminals that are designed to handle the extremely high peak currents that this amplifier is capable of giving. Connections from these terminals to the loudspeakers should be made with heavy-duty wire. Stranded wire of 16 gaugeor thicker is recommended especially if low impedance loudspeakers are used. The following describes the connections for 2 channel and 4 channel