Bose ControlSpace ESP 880A Engineered Sound Processor. It features 8×8 analog audio I/O, a Bose AmpLink output, and advanced digital signal processing with 48 kHz/24-bit audio conversion. The Bose Professional ControlSpace ESP-880A engineered sound processor is design for a wide variety of applications.
Frequency Response: 20 Hz – 20 kHz (+0.3 dB/-0.1 dB)
Dynamic Range: > 115 dB A-weighted 20 Hz – 20 kHz, analog through
Output Impedance 66 Ω and Maximum Output Level +24 dBu
Dimensions: 1.7″ H x 19.0″ W x 8.5″ D (44 mm x 483 mm x 215 mm)