Adcom GTP-830 Speaker Settings Preset Main Large, Center Large Surround Large Subwoofer On

INITIAL SETUP

Installing surround speakers will greatly enhance the surround experience as these add considerably to the overall “ambiance.” Dolby Pro Logic encoded material is deliberately limited in dynamic range and frequency bandwidth for the surround channel and thus only requires speakers of far lesser capa- bilities compared to the front channels. Dolby Digital, however, is a full range system with two independent surround channels and with dynamics equal to that of the front channels. For this reason it is advisable to choose loudspeakers which are simi- lar in power handling and performance capability to those of the front channels. If you are using only one pair of surround speakers, make sure to con- nect them to the Surround Rear outputs. If you choose to install another pair of surround speakers, locate them behind your listening position, and con- nect them to the Surround Back outputs. Surround Back channels add to the spaciousness and coher- ence of the sound field, but the Surround Rear channels must be present for the desired effect.

Many film soundtracks rely heavily on very low fre- quency sound effects which are difficult for normal or smaller hi-fi speakers to reproduce. To faithfully reproduce these low frequencies you can use a specially designed low frequency loudspeaker with its own built-in amplifier (“active subwoofer”). Because it is difficult to hear which direction very low frequencies are coming from, you only normally need one subwoofer and this can be placed virtual- ly anywhere in the room. Dolby Digital uses a dedicated Low Frequency Effects (LFE) channel. If a subwoofer has been selected, the LFE channel will be fed to the subwoofer output.

First you need to indicate which speakers are pres- ent in your system. Besides the Main speakers (Left

&Right), these can include a Center, two Surround Speakers and a Subwoofer.

Call up the SETUP menu of the On Screen Display.

Select the SPEAKER SETTINGS.

Highlight PRESET and use the Left and Right arrow buttons to select the preset (PRESET 1, 2 or 3) that best applies to your setup. Select a preset based on speaker sizes, then use the Up and Down arrow but- tons to adjust for the absence of Center or Surround speakers.

Preset 1: Main - LARGE; Center - LARGE; Surround - LARGE; Subwoofer - ON

In this mode, all speaker channels are large, i.e. full range, and the home theater system has a sub- woofer. This preset is particularly useful for large rooms.

Preset 2: Main - LARGE; Center - SMALL; Surround - SMALL; Subwoofer - OFF

This preset is necessary for a home theater system that does not have a subwoofer. The bass frequen- cies from the center and surround channels are redirected to the main speakers.

Preset 3: Main - SMALL; Center - SMALL; Surround - SMALL; Subwoofer - ON

This preset is ideal for those systems using 5 small speakers combined with a subwoofer. The bass frequencies from each of these 5 channels are redirected to the subwoofer.

NOTES:

Regardless of the available main speakers, select Preset 2 when subwoofer is not available to redirect bass frequencies to the main speakers.

The Surround settings affect both the Surround Rear and Surround Back speakers.

SPEAKER SETTINGS

PRESET : 1

MAIN : LARGE

CENTER: LARGE

SURROUND : LARGE

SUBWOOFER : ON

DO NOT SAVE AND EXIT

SAVE AND EXIT

ADCOM OWNER’S MANUAL 33