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Bose FreeSpace IZA 250 Integrated Zone Amplifier The Bose FreeSpace IZA 250 is a versatile integrated zone amplifier designed for professional audio applications. Ideal for small to medium-sized commercial sound systems, it offers flexible input options, precise tonal control, and reliable performance. Key Features Power Switch - ON/OFF AC power control Power LED - Indicates when the unit is active Input Clip LED - Alerts when input signal approaches threshold (-3 dBFS) Mic/Line Input - Combination balanced XLR-TRS connector for dynamic microphones Mic/Line Input Gain - Adjustable gain from 0 dB to +50 dB for microphone inputs AUX Input - 3.5 mm stereo line-level input with priority override Input A/B Selector - Selects rear line-input channels A or B (disabled when using REMOTE connection) Treble/Bass Controls - Tonal adjustments with ±6 dB at 7 kHz and 100 Hz Master Level Control - Overall system volume for loudspeakers and AUX OUT (disabled with REMOTE connection) Front Panel Note: When using a REMOTE connection, the INPUT A/B selector switch and MASTER LEVEL control are disabled. Rear Panel Input A/B - Two channels of stereo RCA input connectors Input Gain - Adjustable from -20 dB to +20 dB for each Input A/B channel Page Input - Euroblock mic/line input with trigger contact closure for push-to-talk microphones Page Input Gain - Gain control from 0 dB to +50 dB for page input signal DIP Switches - Four switches to configure amplifier settings Remote - Input jack for Bose® volume control with A/B switch AUX Out - Variable line-level output for ZA zone amplifiers or additional audio equipment EQ - Loudspeaker equalisation presets for FreeSpace DS 16 and DS 40 loudspeakers; includes high-pass filter option Mute - Contact closure to mute all outputs including AUX OUT Output 1 / Output 2 Trim - Up to 20 dB attenuation of individual loudspeaker outputs relative to master level Output - Speaker connections for two 4Ω or 8Ω loudspeakers (IZA 250-LZ) or one 3-pin Euroblock for 70/100 V systems (IZA 190-HZ) AC Mains Receptacle - AC line voltage input