User manual CREST AUDIO AM-411 AUTOMATIC MIXER SPECIFICATIONS

[. . . ] AMTM-411 Automatic Mixer SERIES Features · patented priority control circuitry Description The AM-411 is a professional, automatic microphone audio mixer intended for fixed installation applications. · single rack space package This single rack mount package is designed to provide high quality audio performance and easy-to-use con· four microphone inputs trols. [. . . ] Using patented (US · rear panel master/slave linking mode switch Patent number 5, 652, 800) Priority Control Circuitry, the · master balanced output AM-411 eliminates the irritating comb filtering that often occurs when a person speaking into a wireless lapel · mic or line level master output with switch mic moves close to an active podium mic. With the addition of the AM-411's ability to link multiple units, this unit · unbalanced aux out provides even more flexibility for a wide range of appli· removable "euro" connectors for all audio connections cations. · rear panel power switch · removable IEC power cable Specifications test conditions: reference: INPUT SPECIFICATIONS EIN: preamp gain range: input impedance: AMTM-411 Automatic Mixer 120 Vrms, 60 Hz line voltage maintained throughout testing 0 dBu = 0. 775 Vrms -128 dBu (R s = 150 Ohms), typical 10 dB - 65 dB (MIC inputs) -13 dB - 44 dB (LINE inputs) 2K Ohms (Mic inputs) >10K Ohms (LINE inputs) >10K Ohms (INSERT inputs) 0 dB to 9 dB +48 Volts MIC inputs LINE inputs INSERT inputs priority (channels 1 and 2): phantom power: input sensitivity: -61 dBu -40 dBu +4 dBu maximum input level: common mode rejection: OUTPUT SPECIFICATIONS frequency response: THD: signal/noise: output impedance: nominal output level: MIC inputs +12 dBu LINE inputs +30 dBu INSERT inputs +21 dBu >70 dB 20 Hz - 20 kHz 75 Hz (-3 dB) to 20 kHz (-1 dB) (at +4 dBu; reference: 1 kHz; 75 Hz HPF) >0. 1% at +4 dBu (22 Hz - 30 kHz BPF) (R s = 150 Ohms; 30 kHz LPF) >85 dB (all controls fully CCW) >200 Ohms LINE level output MIC level output INSERT outputs LINE level output MIC level output INSERT outputs +4 dBu -26 dBu +4 dBu +21 dBu (hi-Z load) +18 dBu (600 load) -9 dBu (hi-load) -12 dBu (600 load) +21 dBu (hi-Z load) maximum output level: GENERAL SPECIFICATIONS channel clip LED: red LED lights 2 dB before clipping also lights to indicate mute on channel 1 and 2 inputs red LED lights 2 dB before clipping yellow LED lights at +4 dBu green lights at -16 dBu 120 Vrms, 60 Hz domestic 230 Vrms, 50/60 Hz export 15 Watts nominal 1. 75" x 19" x 9. 38" (45 mm x 483 mm x 238 mm) 7. 5 lbs (3. 4 kg) output level indicators: power requirements: dimensions: weight: Architects' & Engineers' Specifications: The automatic microphone mixer shall have four electronically balanced, low noise microphone/line inputs . Each input shall have its own gain control. Input 1 and 2 shall each have the patented Priority Control Circuitry with a priority assign and individual front panel mute controls. Each channel shall have individual line level inserts with enable/bypass switch. Forty-eight Volt phantom power shall be available on all channels and be switched on inputs 1 and 2. A security cover is included, protecting the main controls on the front panel with marking zones for each input. The master section shall be equipped with gain management computer logic for seamless operation. There shall be a balanced mic or line master output with switch. In addition, there is a master, unbalanced auxiliary output. There is a master/ slave linking connection and switch on the back panel for connection to additional AM-411 units, and also the AM-811 as well as the MM 623 mixer. [. . . ] The unit shall operate from 120 VAC, 60 Hz domestic and from 230VAC, 50/60 Hz export. Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications. 9/4/01 v. 1. 5 *A4500016* Crest Audio Inc. Fair Lawn, NJ 07410 USA TEL: 201. 909. 8700 FAX: 201. 909. 8744 www. crestaudio. com [. . . ]