Operating Manual 8260A, 8250A and 8240A DSP Loudspeakers
Introduction Congratulations and a thank-you for the purchase of this Genelec 8200 Series DSP Loudspeaker. These systems are designed to integrate easily into the digital production environment. There are several ways to configure and operate the DSP loudspeakers for a wide variety of high quality audio applications. The loudspeakers also have analog inputs, making them versatile and intelligent replacements for analog loudspeakers.
Figure 1. Connectors and controls on the back panel of a 8260A. 8240A and 8250A share the same layout but without the 12 V trigger voltage connector. feature high SPL output, low colouration and broad bandwidth in a small enclosure size. They are suitable for a wide variety of tasks, such as near field monitoring, mobile vans, broadcast and TV control rooms, surround sound systems and home studios.
“DIGITAL THRU AES/EBU” Connector Mounting Considerations This male XLR carries an unaltered copy of the digital signal fed into the “DIGITAL IN AES/EBU” connector. It can be used for daisy-chaining up to four loudspeakers together. Align the Loudspeakers Correctly “ANALOG IN” Connector Use this connector for analog audio signals. When operating an 8200 Digital system in the analog mode the A/D converter must not be overloaded, otherwise distortion will be heard. The maximum input level is +7.
Figure 2. The location of the acoustic axis is on the centerline of the speaker at the given height “h”. The acoustic axis of the 8260A is located at the centrer of the coaxial driver. Figure 4. Recommended distances from a single wall to the front baffle of free-standing loudspeakers. Correct (green), acceptable (orange) and not recommended (red). sufficiently large to dissipate heat so that the ambient temperature does not rise above 35 degrees Celsius (95°F).
Setting the Input Sensitivity The loudspeaker level sensitivity functions for both analog and digital input. The sensitivity can be matched by adjusting the rotary Level control together with the System Level switches located in the switch group 2. (switches 6 and 7). The switches provide attenuation levels of -10 dB (sw. 6 ON), -20 dB (sw. 7 ON) and -30 dB (both switches ON) The combined attenuation ranges from 0 to -42 dB. Figure 6.
AES/EBU CH This selects the audio channel(s) available on the AES/EBU cable to be reproduced by the loudspeaker. Turning both switches on reproduces the sum of the two channels on the AES/EBU cable. Turning both switches off has the same effect which has been done deliberately to avoid the situation where no input channel is selected and the loudspeaker is effectively muted. When two channels are selected, 6 dB of attenuation is automatically applied to avoid overloading the loudspeaker.
Figure 9. The curves above show the effect of the “Bass Tilt”, “Treble Tilt”, “Desktop Low Frequency” and “Bass Roll-Off” controls on the free field response of the 8240A. Figure 10. The upper curve group shows the horizontal directivity characteristics of the 8240A measured at 1 m. The lower curve shows the system’s power response. Genelec Oy 8250A (dBr) vs freq (Hz) 17 Jan 06 100 95 d B r A 90 0° 15° 30° 85 80 75 45° 60° 70 65 60 55 50 20 50 100 200 500 1k 2k 5k 20k 10k Hz Figure 11.
Figure16. 8240A vertical directivity plot. Figure 15. 8240A horizontal directivity plot. Figure 18. 8250A vertical directivity plot. Figure 17. 8250A horizontal directivity plot. Figure 20. 8260A vertical directivity plot. Figure 19. 8260A horizontal directivity plot. 95 d B r A Genelec Oy 8260A (dBr) vs freq (Hz) 12 Jan 11 90 85 80 75 20 50 100 200 500 1k 2k 5k 10k 20k 40k Hz Figure 21. 8260A on-axis free field response up to 40 kHz .
SPECIFICATIONS 8240A Drivers Bass Midrange Treble 8250A 8260A 165 mm (6.
www.genelec.com Genelec Document D0081R001a Copyright Genelec Oy 2.2011. All data subject to change without prior notice. International enquiries: In the U.S. please contact: In Sweden please contact: In China please contact: Genelec, Olvitie 5 Genelec, Inc., 7 Tech Circle Genelec Sverige Beijing Genelec Audio Co.Ltd FIN-74100, Iisalmi, Finland Natick, MA 01760, USA Ellipsvägen 10B Jianwai SOHO, Tower 12, Phone +358 17 83881 Phone +1 508 652 0900 P.O.
