Mackie 24.8Bus Architect's Specifications - Page 5

5 associated with AUX Returns 1 and 2 shall allow signals fed through these returns to be delivered to the L/R mix, or to the Submasters in pairs (1/2, 3/4, 5/6, 7/8), in any combination, used in conjunction with its associated balance potentiometer. Switchable assignment routing switches associated with AUX returns 3 and 4 shall allow signals fed through these returns to be delivered to phones 1, phones 2 and the L/R mix, in any combination. AUX returns 5 and 6 shall be dedicated to the L/R mix. Termination for all AUX returns is via unbalanced 1/4" TS connectors, which shall be capable of accepting nominal signal levels from -20dBU to +22dBU. 25. EXPANDER CONSOLE. The audio mixer is constructed to accept an (optional) separate expander frame capable of accommodating an additional 24 inline input/output channels, each channel providing performance and control functions identical to those provided by the inline input/output channels in the mainframe. Note: This feature is not available on the 16•8 console. 26. METER BRIDGE. An optional meter bridge shall be available for both the mainframe in 16, 24 and 32 channel configurations and the separate expander console 24-channel frame. The mainframe meter bridge shall consist of an enclosure that shall attach to the mainframe with supplied hardware. It shall provide 12-segment LED ladders calibrated from - 40dB to +10dB for each input channel. The signal source for these meters is globally selectable between the output of the corresponding tape return preamp or the channel's direct output. It shall also provide lighted VU meters indicating left and right Control Room selection. 27. OVERALL MINIMUM SPECIFICATIONS. CHANNEL STRIP. Mic In: Electronically balanced; discrete input configuration. Noise (Mic E.I.N.20Hz20kHz): -129.0 dBm, 150Ω source, -131.2 dBV, 150Ω source, -131.5 dBm, input shorted, -133.7 dBV, input shorted. Distortion: 0.005% 20Hz-20kHz @ 1KHz, +14dBU. Gain Range: +10dB to +50dB. Line In: Electronically balanced/unbalanced. Gain Range: Unity to +42dB. Max Input: +22dBU. Channel Fader Range: -100dB to Unity to +10dB. AUX Send Gain Range: off to Unity to +15dB. Mix B Gain Range: off to Unity to +15dB. Equalization: Hi Mid: full parametric,±15dB freq. sweep from 500Hz-18kHz bandwidth (Q) variable from 1/12 oct. to 3 oct, Lo Mid sweep: 45Hz-3kHz ±15dB, Hi shelving: 12kHz ±15dB, Lo shelving: 80Hz ± 15dB, Lo Cut (HPF): 75Hz 18dB/ octave (Tchebechev). Channel Direct Out Max Output: +22dBU Noise (Ch. @ Unity Gain) -101dBU. Output Impedance: 120Ω. Tape Returns: Bal./unbal. 1/4" jacks, globally switchable from +4dBU to -10dBV: Channel Insert Max Out: +22dBU, Max In: +22dBU. Ch.-to-Ch. Crosstalk -95dB @ 1KHz. SUBMASTER SECTION. Noise: -90dB re: 20Hz to 20KHz +4dBU 16 chs. assigned & set @ Unity Gain . Submaster Output Max Out: +22dBU bal., +22dBU unbal. Submaster Insert Max Out: +22dBU. Submaster Insert Max In: +22dBU. Fader Range -100dB to Unity to +10dB. MAIN L/R SECTION. Mix noise (24 channels assigned, channel faders at Unity Gain): -92dB, -96dB (ref. +4). Max Output: +28dBU balanced XLR, +22dBU unbalanced 1/4". AUX SECTIONS. AUX Returns Gain Range: off to Unity to +20dB. AUX Sends Max Out +22dBU. GENERAL. Distortion: 0.009%, @1kHz, 20Hz-20kHz bandwidth. Below 0.025%, 20Hz-20kHz at normal operating levels, any input to any output. Frequency Response: 20Hz-40kHz ±1dB any input to any output; 10Hz-120kHz ± 3dB The audio mixer shall be a Mackie Designs 8•Bus mixer. Because Mackie Designs constantly endeavors to improve its products with new components and manufacturing methods, all specifications are subject to change without notice. Rev 1.3 ©19951998 Mackie Designs. "Mackie.", is a registered trademark of Mackie Designs Inc. ® MACKIE DESIGNS INC. • 16220 WOOD-RED RD. WOODINVILLE • WA • USA • PHONE TOLLFREE 800/258-6883 FAX 425/487-4337 • OUTSIDE THE U.S., PHONE 425/487-4333 5