User manual ATLANTIC TECHNOLOGY SP-8000 INSTRUCTION MANUAL

[. . . ] Instruction Manual SP-8000 Subwoofer Preamplifier High Performance Customized Bass Management For Any Freestanding Amplified Subwoofer SP-8000 Subwoofer Preamplifier Your Subwoofer 2 Safety Precautions SP-8000 Subwoofer Preamplifier IMPORTANT NOTE These instructions are for Atlantic Technology Model SP-8000, which must be used with either a powered subwoofer or a subwoofer with external power amplifier. The SP-8000 is a preamplifier controller only, it does not contain a power amplifier. The SP-8000 can be used with virtually any amplified subwoofer system which has either a balanced or unbalanced line-level input. Table of Contents 3 SP-8000 Subwoofer Preamplifier 4 SP-8000 Features 5 6 7 7 4 Preamplifier Front Panel Premplifier Back Panel Remote Control Connecting Your Preamplifier Test and Training CD-ROM Safety Precautions 8 Basic Hookup 9 Remote Control Connections 10 Subwoofer Placement 7 7 9 Input Output Power Connection Single Subwoofers Dual Subwoofers 10 System Setup and Operation 10 10 10 10 11 11 11 11 12 12 12 CAUTION: To reduce the risk of electric shock, do not remove the cover . WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. [. . . ] It is highly likely that you will find at The PHASE Control least one significant peak (between 20Hz and the crossover point set on A subwoofer operating out of phase with the rest of the amplifier or in the processor). Write down the center frequency of the the system won't provide optimum low frequency perpeak, how wide the peak is (by noting the upper and lower frequencies formance. Also, the correct subwoofer phase can help where it starts and stops) and how large it is, in dB. compensate for room acoustic anomalies. Therefore, Begin setting the paraa PHASE switch that will alter the phase of the SubFREQUENCY WIDTH ATTENUATION 75 1. 0 -10 metric EQ by adjusting woofer is provided on the SP-8000. It has 4 positions (0°, 90°, 180°, 270°) the FREQUENCY control for added flexibility. To set the PHASE control, insert the supplied Atlantic to the approximate center Technology/Sencore Test and Training CD in your CD/DVD player and select 25 125 0. 2 1. 5 -20 0db frequency of the peak. Next the broadband bass test tones on Track 16. Have someone sit in the prime adjust the WIDTH control listening position to evaluate the sound. Pay particular attention to the tranto the approximate width of the peak. Note that the WIDTH control is sition of bass from the subwoofer to the satellite speakers. An octave is a doubling or halving of any chosen You can also listen to a musical source such as a CD or DVD, with strong SA-700 frequency. For example, if the chosen frequency is 40Hz, 1 octave higher Servo Controlled bass content that spans the range from deep bass to mid bass (a well Subwoofer Amplifier would be 80Hz, and one octave lower would be 20Hz. Since the WIDTH recorded jazz disc with someone playing a full stand up bass is always a control ranges from 0. 2 octave to 1. 5 octaves you see that you can adjust good choice). It's best not to use a "one note" special effects track like a big from a fairly narrow band to a fairly wide band on either side of the center explosion or dinosaur stomping to test the subwoofer. Next, set the ATTENUATION control to the approximate minus position of the PHASE control(s) to get the best transition from sub to satdB value to compensate for the peak. Measure the bass response again ellites. It should be fairly obvious which is the correct setting. In particular, and see how much you have reduced the overall peak. You may need to there will be a smoother, more integrated transition between the satellites fine-tune the controls to smooth the response as much as possible. and the subwoofer when they are properly phased. Parametric Room Equalizer (EQ) In order to optimize the performance of your subwoofer the parametric room equalizer should be utilized. The built in Room EQ allows you to select the frequency you want to adjust, and how wide a band on either side of that frequency you're going to adjust with it. [. . . ] LEVEL TRIM and MUTE - The and buttons let you change the total output level of your subwoofer to compensate for soundtrack variations and your personal preferences. Each push of the button results in a 1dB change above or below the preset reference set with the BASS LEVEL control. The LEVEL TRIM readout on the amplifier indicates the level of adjustment in dB. Pressing the MUTE button turns off the volume of the Subwoofer. [. . . ]