Sherbourn Technologies PT-7010A owner manual Surround Back Speakers, Subwoofer Location

dipole speakers, intended for use as an effects or surround speaker, have excellent details on optimum positioning for the best overall results based on the application.

Conventional surround speakers can be placed behind the listener, on the rear walls or the side walls or in the ceiling. Adjust the angle so they do not point directly at the listener but cause reflections from the sidewalls, floor, or the ceiling. Avoiding direct aim at the listening positions will give the effect of broadening the rear soundstage so that you cannot distinguish the sound as coming from a small box on the wall but from a larger area behind you.

Surround Back Speakers

The PT-7010A has two extra outputs for surround back speakers. These create a wonderful sense of realism in surround effects during playback of Dolby Digital EX, Dolby Pro Logic 11x, and DTS ES.

The PT-7010A can be configured for one or two surround back speakers. Ideally, all the surround speakers should be of the same make and model, and fitted at similar heights to produce a smooth continuous sound field. If you are connecting one surround back speaker, connect its amplifier input to the PT-7010A LEFT CHANNEL SURROUND BACK output. Place the speaker behind your listening position.

Subwoofer Location

The PT-7010A has identical output connections for up to three subwoofers, in addition to a fourth, balanced sub output.

A subwoofer typically sounds best in a corner with at least 5 feet of wall to either side. Due to the short wave-lengths of high-frequency sounds, they don’t interact strongly with the size and shape of a room. Lower frequencies long wavelengths can cause “Standing wave” problems. Placing the subwoofer in a corner usually creates the best possible situation for the sound to interact with the room, allowing even distribution of the bass frequencies. Often the corner that offers nearby placement to the front speakers may yield the best results, but you should try several locations before settling on just one.

The best location for a single subwoofer can be found by playing a couple of different low frequency test tones (or some music with heavy sustained bass passages) and proceeding with the following easy

1 -2-3 process:

1.Place the subwoofer right on the seat of your couch or listening chair.

2.You can then either run the calibration (noise) signal

through it, or simply plug the analog outputs of a CD player directly into your subwoofer’s low-level inputs. Turn down the subwoofer’s volume level before turning on the CD, then play the test tones or some music with heavy sustained bass passages.

3.Walk around the room, standing in all the positions where you might be able to place the subwoofer. Again, this is usually near the corners of the room. Try locations fairly close to the front speakers.

Notice where in the room the bass output from the subwoofer sounds the loudest. Shut things down and install the subwoofer there. This is the best position for the subwoofer. The bass will sound the best when you are sitting in your normal listening position.

If your subwoofer seems to sound best when it is near the front speakers (often the case), keep in mind that most television sets may not react well to the subwoofer if it is not built specifically for use in a home theater application. While most front Left/Center/Right speakers do have shielding when intended for use in a home theater application, subwoofers are not always magnetically shielded and may damage the television if placed too close. If you want to check if this will be a problem, select an unused video input on the television to bring up a single color screen. If you see any color distortion anywhere on the screen, an unshielded speaker is too close to the screen and should be moved away from the television until the color distortion disappears.

Note - most powered home subwoofers feature a phase control with a range between 0-180 degrees. This is present so that in situations where the optimum location is not particularly desirable, you can locate the subwoofer elsewhere nearby and make a slight adjustment to the phase so that is sound arrives to the listener at the same time as the other speakers. Ideally, sound arriving at the same time is what allows the subwoofer to create the illusion of the main speakers making the bass. This is what enhances the listening experience.

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