User manual SUNFIRE HRS-10

[. . . ] High Resolution Series Subwoofer HRS-8, HRS-10, and HRS-12 User's Manual Important Safety Instructions 1. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Unplug this apparatus during lightning storms or when unused for long periods of time. Refer all servicing to qualified service personnel. [. . . ] Whenever possible, keep the power cords away from the signal cables or speaker wires to prevent hum or interference. · · User's Manual 9 Location Here is a neat trick to find the best subwoofer location for your room: 1. Start by placing it right on the seat of your favorite couch or easy chair. (This method is odd, but it is based on principles of acoustic physics). If the subwoofer is part of a Home Theater system you can use the calibration test tone (pink noise) usually found in the processor/ receiver's setup menu; or you can simply plug the outputs from a CD player directly into the subwoofer's line-level inputs, remembering to turn down the volume level on the subwoofer first, and then playing some of your favorite music samples containing heavy bass. Stand in all the locations where you might place the subwoofer. Try crouching down, particularly in the corners. Find the place where the subwoofer's bass output sounds the loudest. Turn off the subwoofer and disconnect it from the power and from your processor/receiver or CD player. Next, install the subwoofer in the location you have just determined is best and remake all your connections. Magnetic Fields Remember to keep the subwoofer at least two or three feet away from any TV screen, computer, VCR or magnetic tapes and discs. This will reduce the chance of the magnetic fields upsetting the TV screen or erasing your magnetic media. . Using two Subwoofers If you wish to use two subwoofers, the sound output will double (an increase of 6 dB). Locate the subwoofers with one in each corner and experiment with the location and phase control to achieve the best bass response. Always drive each subwoofer through the left line-level input even though you are driving one subwoofer with a right channel drive and the other with a left channel drive. If your preamplifier has a single sub/LFE output, use a Y cable to split it into two outputs. . 4. Although low frequencies are non-directional, factors such as room reflections, standing waves, resonance and absorption will strongly affect your subwoofer's performance. Moving the subwoofer from one location to another can have a major effect on the bass response. 10 User's Manual System Configurations The following pages show some typical connections that you might make in your installation. They show how the inputs and outputs of the Sunfire Subwoofer are connected to your preamplifier or receiver. Connections to a preamplifier's subwoofer output If your processor or receiver has a subwoofer output (Sub/LFE), it should be connected to the subwoofer's Left input as shown. This is the simplest and recommended connection. If you have a Home Theater processor or receiver, it probably has an independent subwoofer volume and crossover control. If so, you should set the subwoofer's volume control to 0 dB, the crossover to Bypass, and use the processor's subwoofer level and frequency controls for adjustments. PREAMPLIF IER T L R SUB/LFE OU MAIN OUTPUTS AMPLIFIE R L R INPUTS TO FRONT SPEAKERS User's Manual 11 Connections using Y cables If your processor does not have a Sub/LFE output, you can use "Y" cables (or Y adaptors) to send its left and right main outputs to both the subwoofer and your amplifier. The subwoofer will play the low frequency range, and your front speakers will play the full range. Although bass is commonly distributed evenly between left and right channels (L+R bass), movie soundtracks often contain differential (L-R) bass. If this is not preserved, the bass in these scenes sounds anemic. The PREAMPLIF IER subwoofer utilizes differential gain on SUB/LFE OU the left and right T inputs to retain both the L+R and L-R information. [. . . ] Ground-loop isolators are available for audio lines and video. Once you have identified which components are causing a problem, you can fit the isolators between the component and the preamp. · · · No auto turn off · The subwoofer should turn itself off after approximately fifteen minutes with no audio signal present. If not, check there is no background hum. The subwoofer may sense hum as a small signal and stay on. [. . . ]