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The APB ProSpec 1U4M4S 4-Channel Single-Space Rackmount Mixer is designed for professional audio signal routing in recording, audio production, broadcast and mixing applications. The ProSpec 1U4M4S features 4 mono channels with XLR - TRS Phone combo-connections, and 4 stereo input channels with L/R stereo phone inputs. There are inserts connections on all mono channels, and balanced stereo and center channel output via XLR connections. The front panel features level and pan controls for each channel. Additional features include HPF switches, Mute switches and internally illuminated controls.
Live performance mixer designed to operate in Mono, Stereo, or LCR applications
4-Channels of Professional Quality Burr-Brown Microphone Pre-Amplifiers and 4 balanced stereo
line input channels
Balanced left, right, and mono (center) XLR outputs
All front panel switches are internally illuminated
Individual solo switch on each mono and stereo input channel
Monitor headphone level control with 1/4" and 1/8" headphone connectors and rear panel APB mixer link connector
Each input channel is assignable to left-right or mono (center) mix bus
Level and pan controls on mono input channels / level and balance controls on stereo input channels
Mono input channels have 48-Volt phantom power, high pass filter, polarity reverse and assignment switches
Stereo input channels have mute, polarity reverse, and assignment switches
Individual left, right, and mono (center) metering
Front panel left-right sum switch
Mono input channel use Neutrik XLR/1/4" combo connectors and TRS insert points
Stereo input use individual 1/4" balanced left and right input connectors
Low phase-shift, wide bandwidth electronic design derived from APB's Spectra and ProDesk products
Balanced mic input (XLR input of combo connector) Mic gain (Max): 60dB
Mic input Z: 2k Ω
Mic EIN: -127dBu @ 60dB gain, 150 Ω source
THD + Noise (mic input to main output)< 0.005% @ 15dBu output
Bandwidth @ 40dB Gain > 200kHz (ref to 1kHz) microphone input to main output
@ 60dB gain approx 160 kHz (ref 1kHz)
Phase response: +/-11 degrees, 20Hz to 20kHz (ref 1kHz)
HPF: 75Hz @-18dB/Octave
Unity Gain approx 2 o'clock Pot rotation
Balanced line input (TRS input of combo connector) Line gain (max): 42dB
Line input Z: > 10k Ω
THD + Noise (line input to main output): < 0.01% @ 15dBu output
Bandwidth approx 160kHz (ref to 1kHz): line input to main output
Phase response: +1.5/-17.5 degrees 20Hz to 20kHz (ref 1kHz)
Unity gain approx 10 o'clock Pot rotation 10dB
Balanced line input (TRS)
Max gain: 20dB
Line input Z: > 10k Ω
THD + Noise (input to main output <0.005% @ 15dBu output)
Bandwidth: > 200kHz (ref to 1kHz) input to main output
Phase Response +3/-9 degrees, 20Hz to 20kHz (ref 1kHz)
HPF: 40Hz @-18dB/octave
Unity gain approx 10 o'clock Pot rotation
10dB gain at approx 2 o'clock Pot rotation
Balanced XLR using OutSmarts Driver ICs (also capable of unbalanced operation)
Max output level: +26dBu (into 600 ohms or greater)
Bal output Z: 50 Ω
Residual output noise:< -95dBu *
*all channels unassigned and channel sends down, master at unity (2 o'clock)