User manual B&K REFERENCE 50 2

[. . . ] B & K Components, Ltd. REFERENCE 50 SERIES 2 User Manual Seven Channel Surround A/V Preamplifier Processor 13790 1104 ii ACCESSORIES AND WARRANTY USER MANUAL - Reference 50 Series 2 © 2004 B & K Components Ltd. No part of this manual may be copied or reproduced in any form without prior written consent from B & K Components, Ltd. SHALL NOT BE LIABLE FOR OPERATIONAL, TECHNICAL OR EDITORIAL ERRORS/OMISSIONS MADE IN THIS MANUAL. The information in this manual is subject to change without prior notice. Accessories Included S IMPLY B ETTER! B&K 1 1 1 1 - SR10. 1 Remote Control - AM Antenna - FM Dipole Antenna - Power Cord 1 1 1 1 - Warranty Card - User Manual - Serial to RJ-45 Adapter - BKcSuite CD-ROM SIMPLY BETTER! [. . . ] Shelving equalization helps to adjust level and frequency to aid in adjusting your room for a flat frequency response. Room Equalization parameters are applied globally regardless of the selected user EQ (The Variable EQ, the Loudness EQ, or the Vocal EQ). The graphs on the next page help describe how shelving equalization can affect the frequency response for a room. Room equalization is applied in all listening modes except DVD-Audio, Direct, and LtRt. 6. Room Resonance (Notch Filters) No speaker has perfectly flat frequency response. These deviations in frequency response contribute to each speaker's characteristic sound. When a speaker is put into a room with walls, floor and a ceiling, reflected sounds can cancel or reinforce one another which further alters the frequency response. SETUP ROOM RESONANCE Test Tone 100. 0 Hz 30. 0 dB Notch 1 150. 0 Hz 0. 0 dB Notch 1 Width 146. 4-153. 6 Hz Notch 2 100. 0 Hz 0. 0 dB Notch 2 Width 146. 4-153. 6 Hz Notch 3 50. 0 Hz 0. 0 dB Notch 3 Width 146. 3-153. 6 Hz Subwoofer Phase Invert next item adjust MENU setup speakers At higher frequencies, hundreds of small peaks and dips can be measured in the frequency response. Attempts to remove all these small deviations would result in colorations to the sound that may not be desirable. The characteristic sound that made the particular speaker(s) attractive could be completely lost. Even if the hundreds of small peaks and dips would be adjusted, it would only be correct for a single position in the room. Moving your head just a few inches would require a completely different set of corrections. At low frequencies, the picture is different. The peaks and dips persist over a much larger portion of the listening area. If the original and reflected waves cancel each other, they will cancel at 1 watt or 1000 watts. If you have major dips in the frequency response you can try repositioning your speakers, particularly the subwoofer. Fortunately, dips in the bass response are typically not that noticeable. When an instrument plays that particular frequency, the bass is lost, but the higher harmonics of the instruments tone are still there. To some degree, your ear and brain will fill in the missing information. Continued on next page. . . 28 MENU SYSTEM SETUP The situation is different for large low-frequency peaks. These peaks are what tend to shake the knick-knacks off the shelves and result in an overall tubby sound to the bass. Fortunately, this CAN be remedied electronically. . . and without drastically altering the characteristic sound of your speakers. Typically a room will have 3 large peaks due to the distance between the front/back walls, left/right walls, and the floor/ceiling. A test tone generator is provided to assist in the process of identifying the resonant peaks. [. . . ] If the unit will not communicate through RS-232, perform a factory reset. Know how to properly set the COM port protocol in your version of Windows: Window 9x/Me - Go to your system's "Control Panel. " Double click the icon labeled "System. " Click the Device Manager button. Scroll down until the section labeled "Ports. " Click the small "+" located next to "Ports" to expand the tree and view the installed communication ports. Double click the COM port that corresponds to the port on the PC that the CT/CK/SR product will be physically connected to. [. . . ]