Model 740 Spectral Processor User`s Manual

WARNING: To reduce the risk of fire, use the correct rating and type of fuse:

For 100/110V, use 500 mA ¼" x 1¼" slow-blow fuse

For 220/240 V, use T200 mA 5 x 20 mm time lag.

Close the compartment door making sure that it clicks firmly into place.

Power Connections

Connect the power cable between the model 740 Spectral Processor and the power outlet.

SEE SECTION 6 (APPENDIX A) FOR IMPORTANT INFORMATION

ON WIRING CONVENTIONS.

Note

For some markets the unit is supplied with a three-wire power cord with a three-pin polarized plug for connection to a power source and a safety ground (earth). The ground terminal of the plug is directly connected to the chassis of the model 740. For continued protection against electric shock, a three-pin power receptacle MUST be used, and the ground wire MUST always be connected. DO NOT use a ground lifting adaptor and NEVER cut the ground pin of a three-pin plug.

Connections For the United Kingdom:

WARNING: THIS APPARATUS MUST BE EARTHED

As the colours of the cores in the mains lead may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: x

The core which is coloured green and yellow must be connected to the terminal in the plug which is marked with the letter E or by the earth symbol or coloured green or green and yellow.

x

The core which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black.

x

The core which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red.

Bringing Out Ambience

Reverberation and ambience tend to have most audible effect at midfrequencies. The crossover controls on the Spectral Processor will allow the width of the Mid band to be adjusted, and this can be used very successfully to amplify any ambience present on a track.

THRESHOLD

Active

EQUALIZATION

Side Chain

Low Mid

10

SOURCE NR

-6

0 20

In

Eq

Out dB

-12

High

Side

Chain

OUTPUT

CHANNEL

The settings shown above cover a broad range useful in enhancing ambience. Adjusting the spectral balance between Mid and High allows the “color” of the ambience to be altered. The Threshold adjustment is important in order to differentiate between lower level ambience and higher level direct sound. Switching to Side Chain mode can help in locating which parts of the ambience are being boosted.

Notice that because of the way the Spectral Processor works, the ambience will only tend to be brought up when there are no other spectral components masking it. In this way, more ambience is perceived on the track, yet the intelligibility of vocals or the clarity of the instruments is not smeared by that ambience.