APB ProRack- House (H1020)

• 20 Microphone pre-amplifiers in total. 12 Mono mic/line input channels and 4 Dual-Mono/Stereo mic/line input channels, all with Spectra-quality microphone preamplifiers in a 10u (17.5" in x 19") package.
• Minimum phase shift circuitry and internal Mother Board/Daughter Board construction derived from the Spectra console design.
• 48 volt Phantom Power switch, Polarity Reverse switch, Mic/Line switch, Mic Pad switch on input channels. (Combo mic/line/pad switch on stereo input channels).
• Variable frequency high-pass filters on all Mono and Stereo input channels with a 20Hz to 400Hz sweep range at 12dB per octave.
• Mono input channels feature fixed high and low frequency EQ bands and two mid-sweep EQ bands, with EQ On switch with LED. The Stereo channels feature fixed high and low frequency EQ bands and a single mid-sweep EQ based on Spectra circuitry.
• Six aux sends; each pair of sends switchable between a pre or post fader source. In the pre-fader position, an additional front panel switch determines if that pre-fader signal is derived pre or post EQ. Aux controls 5 and 6 may be switched to become a stereo pair.
• All channels can assign to Left-Right, Center and Mono mix bus assignment along with additional assignment switches to subgroups 1-2 and 3-4. These outputs (including aux outputs) each have balanced XLR outputs, TRS bus inputs and TRS insert connectors.
• Left-Right, Center and Mono mix output level can be switched from line level to mic level.
• Internally illuminated Mute and PFL/AFL switches along with 6-segment LED channel metering and 100mm faders on all input channels.
• Four LED meters can monitor the Left, Right, Center and Mono outputs or the Group 1-4 outputs. Meters auto-switch to show Solo levels.
• Bus level signal monitoring using bi-color LED's on all 14 mix buses: Left, Right, Center, and Mono, Groups 1-4, and Aux 1-6.
• 100-240 VAC, 50/60Hz Power Supply - Field replaceable (plug in) without disassembly of mixer.
• Rear panel rotates and may be locked in any of three preset angles (referenced to the front panel) - 90 degrees, 135 degrees, or 180 degrees.
• Adjustable lamp dimmer provided for the 4-Pin XLR connector for use with (optional) gooseneck lamp.

General Specifications
Frequency Response (any input to any output): +0/-0.5dB 20Hz to 20kHz (ref to 1kHz)
THD + Noise (Mic Input to Main Output): <0.01% @ +15dBu output
Phase Response (Mic Input to Main Output): +10/-15 degrees 20Hz to 20kHz (ref to 1kHz)

Noise
Mic EIN: -128dBu @ 60dB gain, 150? source
Main Bus (L-R-C-M) Output Noise: -85dBu (All channels assigned w/faders down, Master faders at unity)
Group Bus (1-4) Output Noise: -85dBu (All Chan assigned w/faders down, Group Master
fader at unity): Aux Bus (1-6) Output Noise
-90dBu (Aux Sends down, Aux Master at unity): Crosstalk (measured at 1KHz)
Channel Mute: >100dB
Channel Fader Attenuation: >100dB
Channel Routing: >80dB
Channel Pan Isolation: >80dB
Channel to Channel Isolation: >90dB
Aux Send Attenuation: >90dB
Aux Pan Isolation: >70dB

Input / Output Impedance
Channel XLR Input: >3K? Balanced (with or without Pad)
Channel Line Input (via TRS): >20K? Balanced
Channel Line Input (via XLR w/Pad): >4K? Balanced
Channel TRS Direct Out: 100? Impedance-Balanced
Bus XLR Outputs (Main, Group, Aux): 100? Symmetrically-Balanced (To Feed 600? or greater)
Channel and Bus Insert Sends/Returns: 100? Unbalanced / 5K? Unbalanced
(To Feed 2k? or greater)
Monitor TRS Outputs: 100? Impedance-Balanced

Input / Output Levels
Channel Insert: +4dBu (Tip= Send, Ring= Return, Sleeve= Audio Gnd)
Max Out= +22dBu: Channel Direct Out +4dBu

TRS Impedance Balanced, Tip= “Hot": Max Out= +22dBu
XLR Balanced Outs: +4dBu (Symmetrically-Balanced, Pin 2= “Hot”) Max Out= +26dBu
TRS Balanced Outs: +4dBu (Impedance-Balanced, Tip= “Hot”) Max Out= +22dBu
Bus Insert: -2dBu (Tip= Send, Ring= Return, Sleeve= Audio Gnd) Max Out= +22dBu