Mackie 32.8Bus Architect's Specifications - Page 2

2 6. DUAL I/O SIGNAL PATHS. Each inline input/output channel shall provide separate but selectable routing for input signals: a) the primary signal path ("channel") shall route signals from the mic or line input to the channel controls via the main channel fader, with signals from the tape input routed to the channel's Mix-B (Monitor) controls as determined by the Mix-B Source selector switch, b) the routing of the primary and Mix-B signals shall be reversible via the Flip switch, which shall therefore send the signal from the mic or line input to the Mix-B (Monitor) controls, and send the signals from the tape input to the primary signal path controls via the main channel fader. 7. AUXILIARY SEND CONTROLS AND SWITCHES. Each inline input/output channel shall also include AUX send controls as follows: a) rotary controls for AUX Send 1 and AUX Send 2 that allow the level from each individual channel output sent to the AUX 1 or AUX 2 output to be separately adjusted, along with an associated pre/post selector switch that determines whether the output is taken post EQ/post fader or post EQ/pre fader, b) rotary controls for AUX Send 3/5 and AUX Send 4/6 that allow the level from each individual channel sent to the the AUX output 3 or 5 or to the AUX outputs 4 or 6 to be separately adjusted, along with an associated shift switch, an associated pre/post selector switch, and an associated source selector switch. The shift switch shall select whether the signal as adjusted by its associated rotary controls is sent to AUX outputs 3 and 4, or AUX outputs 5 and 6, while the pre/post switch determines whether these outputs are taken post EQ/post fader or post EQ/pre fader, and the source switch selects whether the signal appearing at AUX outputs 3/4 or AUX outputs 5/6 is derived from the primary signal path or from the Mix-B (Monitor) signal path. 8. I/O CHANNEL EQUALIZATION. Each inline input/ output channel shall include an equalizer section consisting of one fully parametric himid equalizer utilizing separate rotary controls for boost/cut, frequency sweep and bandwidth ("Q"), with a control range of ±15dB boost/cut, a frequency range 500Hz to 18kHz sweep, and a bandwidth ("Q") range from 1/12 of an octave to 3 octaves, one semi-parametric lo-mid equalizer consisting of separate rotary controls for boost/cut and frequency sweep, with a control range of ±15dB boost cut, and a frequency range of 45Hz to 3kHz, a shelving high frequency equalizer providing ±15dB boost/cut at 12kHz, and a shelving low frequency equalizer providing ±15dB boost/cut at 80Hz. All equalizer circuitry shall be able to be inserted into or removed from the primary signal path via an associated in/out switch. Additionally, the high and low shelving equalizers shall be assignable to operate only in the Mix-B (Monitor) signal path, without regard to whether the parametric and semi-parametric equalizers are used in the primary signal path. 9. I/O CHANNEL HIGH PASS FILTER. Each inline input/output channel shall include an 18dB/octave, 75Hz low cut (high pass) filter, with an associated on/off switch. 10. I/O CHANNEL LEVEL INDICATORS. Each inline input/output channel primary signal path shall have two LED signal level indicators: a) a red LED that indicates signals 3dB below the onset of clipping in the input stage, the equalizer stages, and/or the output stage, b) a green "activity" LED that indicates signals at -20dB or greater @ 1KHz. 11. I/O CHANNEL FADER AND PAN. Each inline input/ output channel shall utilize a 100mm main channel fader that incorporates a complex precision resistive network to deliver true logarithmic attenuation. The main channel fader shall provide 10dB of gain over Unitey while also providing 100dB of attenuation. In addition, each input/output channel shall include an active buffered constant power pan control (-3dB @ center), providing a maximum of 85dB of attenuation. 12. I/O CHANNEL MIX-B (MONITOR) CONTROLS AND SWITCHES. An additional signal path and pair of L/R I/O Buses shall be provided in each inline input/output channel, and shall be dual purpose, and shall therefore be labeled Mix-B (Monitor). The Mix-B (Monitor) controls shall include switching that allows these Buses to derive their signals from either the tape input, mic/line preamp output or the channel output pre-fader, and additional switching that allows the high and low shelving equalizers to be removed 2