Mackie SR244 / SR324 Architect's Specs - Page 3

3 11. AUXILIARY SEND CONNECTIONS. The mixer shall include impedance balanced, line level outputs from the six auxiliary send buses, appearing on the rear panel as 1/4" TRS phone jacks. 12. AUXILIARY RETURN CONNECTIONS. The mixer shall include 4 stereo auxiliary return inputs. Each auxiliary return shall have a left and a right balanced line level input, accommodating a nominal line level of between -10 dBu and +4 dBu, and shall appear on the rear panel as 1/4" phone TRS phone jacks. The jacks shall be fitted with internal switching contacts to accommodate monaural configuration. 13. AUXILIARY RETURN CONTROLS AND SWITCHES. The mixer shall include 4 dual-channel auxiliary return gain controls, each feeding the main stereo buses. Auxiliary returns #1-2 shall have their signals assignable to auxiliary send buses 1 and 2, respectively, through rotary level controls. Auxiliary return #4 shall be assignable to three different pairs of destinations, feeding either the main left and right buses or the submix buses. 15. PHYSICAL CONFIGURATION. The mixer shall have a steel chassis frame painted grey-black and designed rest on a horizontal surface. The mixer's dimensions shall be 6" high by 31" wide by 19.2" deep. (SR32•4: 6" high by 41.4" wide by 19.2" deep.) 16. OVERALL MINIMUM SPECIFICATIONS. In addition to specifications previously cited, the mixer shall meet or exceed the following performance criteria: Total Harmonic Distortion. (1 kHz @+14 dBu measured 20 Hz-20 kHz.) Line in, one channel: main L/R, .0022%; control room L/R, .003%. Aux return in: main L/R, .0022%; control room L/R, tape in, .003%; control room L/R, .003%. Frequency Response. Typically 20 Hz-60 kHz ± 1 dB, any input to main output. Equalization. High frequency shelving @ 12 kHz, ±15 dB. Midrange frequency: peaking @ 100 Hz8 kHz (monaural channels), peaking @ 800 Hz and 3.5 kHz (stereo channels). ±12 dB. Low frequency shelving @ 80 Hz, ± 15 dB. Equivalent Input Noise. Microphone input noise, 150 ohm termination, 20 Hz-20 kHz: -129.5 dBm. Common Mode Rejection. Microphone input, maximum gain, 1 kHz, 78.5 dB. Noise. (20 Hz-20 kHz referenced to 0 dBu) Main L/R, main faders off, channel gain controls off, -92 dB; main faders at unity gain, channel gain controls off, -85 dB; main faders at unity gain, channel gain controls at unity gain, -82 dB. Control room, same as main L/R. Gain Structure. Microphone input, minimum gain, +10 dB; maximum gain, +60 dB. Line input, minimum gain -10 dB (attenuation); maximum gain, +40 dB. Auxiliary return, maximum gain, +20 dB. Auxiliary send, maximum gain, +15 dB. Main L/R outputs, maximum gain, +10 dB. Solo circuit, maximum gain, +16 dB. Talkback 57 dB. Maximum input levels. Microphone input, +13.5 dBu. Line input, +22 dBu. Tape input, +22 dBu. Auxiliary return input, +22 dBu. Maximum output levels. L/R/mono balanced outputs +28 dBu. Main L/R and tape outputs, +22 dBu. Control room outputs, +22 dBu. Sub outputs, +22 dBu. Auxiliary sends, +22 dBu. Impedances. All outputs 120 ohms unbalanced, 240 ohms balanced. Microphone input, approximately 1.8 kohm. Line input, 20 kohm. Tape monitor input, greater than 10 kohm. Auxiliary return input, greater than 10 kohm. Crosstalk. (20 Hz-20 kHz) Line input to adjacent channel, 1 kHz, at 0 dBu, less than -85 dB. Signal at main L/R output, 1 kHz at 0 dBu at line input: channel gain off, -84 dBu; channel muted, -85 dBu; main faders off, -92 dBu. Pan control attenuation, greater than 70 dB. 17. DESIGNATION. The audio mixer shall be a Mackie Designs SR24•4 (SR32•4). ® 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 Because Mackie Designs constantly endeavors to improve its products with new components and manufacturing methods, all specifications are subject to change without notice. Rev 1.2 ©1995-1998 Mackie Designs. "Mackie.", is a registered trademark of Mackie Designs Inc. 3