Rear panel features – SWR Sound Amplifier POWER 750 User Manual

Page 9

REAR PANEL FEATURES

INPUT SECTION

UNBALANCED INPUTS

This is the main power amp input jack for most applications, and should connect to the "Unbalanced Output" on your preamp of

choice (preferably an SWR Interstellar Overdrive or Grand Prix!). This input utilizes a standard 1/4" phone jack. Input impedance

for the unbalanced input is 33K ohms. Maximum input level is 16 volts RMS.

BALANCED INPUT JACK

Some preamps are equipped with XLR output jacks as a superior option to regular 1/4" patching. An electronically Balanced

(XLR) Input Jack is provided for premium signal integrity. Input impedance for

the balanced input is 10K ohms. Maximum input level is 8 volts RMS.

Pin assignments for the Balanced Input is American Standard as follows:
Pin 1 = ground Pin 2 = + Pin 3 = -

GROUND LIFT

A ground lift is provided for the Balanced Inputs. In the normal (out) position of the push switch,

Pin 1 on the XLR connector is grounded. In the Lift (in) position, the ground on Pin 1 is disconnected. When using the

Balanced Inputs, always be aware of the position of the ground lift switch. This function only affects the Balanced Inputs and

does not affect the Unbalanced Inputs.

SLAVE OUTPUT

A 1/4" Slave Output (some call it a "patch-through") is provided in the event you want to "daisy chain" more than one power amp

at a time. To use the Slave Output to run an additional power amp, run a shielded patch cord from the Power 750 Slave Output

to the input of the additional power amp. Whatever signal is coming into your Power 750 will be available at the Slave Output,

where the signal can be sent to the additional power amp of your choice (preferably ANOTHER SWR Power 750!). The Volume

controls on the Power 750 do not affect the level of the Slave Output. The Slave Output can also be used as an unbalanced

record out or a monitor send.

SPEAKER OUTPUT SECTION

The following section of the manual will deal with the proper connection of speaker cabinets to the power amplifiers in the Power

750. Some of this ground has already been covered in the "Getting Started -Connecting Your Speaker Cabinets" section in the

beginning of the manual. This is meant to

supplement that section and provide information in greater detail, as power amplifiers, impedance

and speaker cabinets are all crucial in determining how best to operate your new Power 750.