Bose ZA2120HZ FreeSpace Zone Amplifier SLAVE 2x120W 230V EU


Recommendations to retail stores, restaurants and bars, hospitality venues, conference centers, schools, auxiliary zones

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The Bose® FreeSpace® ZA 2120-HZ zone amplifier is designed to provide basic amplification and sound system expansion when using front-end Bose products such as FreeSpace® integrated zone amplifiers and ControlSpace® engineered sound processors.


  • Reliable 2 x 120 W Class-D amplification optimized for low-impedance applications
  • Remote option for volume control eliminates the need for bulky, inefficient, and sound-altering in-line volume controls.
  • Expansion-ready connectivity with FreeSpace® IZA amplifiers when additional sources and loudspeaker processing is required.
  • Intuitive feature setup enables the amplifier to be configured without a PC for output and automatic standby options.
  • Auto-Standby feature allows the amplifier to consume less power when not in use.
  • Remote muting allows the amplifier to be muted via a centralized control system.

Power Rating


Amplifier Power

2 x 120 W @ 4 Ω, 2 x 60 W @ 8 Ω

Audio Performance


Frequency Response

20 Hz - 20 kHz (+0/–3 dB, @ 1 W reference 1 kHz)


≤ 0.5 % (at rated power)

Channel Separation (Crosstalk)

≤ –60 dBV (below rated power, 1 kHz)

Dynamic Range

88 dB

Audio Inputs


Input Channels

1 unbalanced, 1 balanced


Stereo RCA, 5-pin Euroblock

Input Range

–10 dBV to +10 dBV

Adjustment Range

–20 dB to +20 dB

Input Impedance

20 kΩ

Maximum Input Level

+10 dBV

Nominal Input Level

0 dBV

Audio Outputs





2-pin touch-proof Euroblock

Nominal Output Level

2 x 120 W @ 4 Ω, 2 x 60 W @ 8 Ω

Indicators and Controls



Power LED

Solid blue indicates power is on, blinking blue indicates standby mode

Input Signal Clip LED

Green indicates input signal is within –39 dBV to 9 dBV, red indicates signal is over 9 dBV

Output Signal Clip LED

Green indicates output signal is within –46 dBFS to –2 dBFS, red indicates signal is over –2 dBFS, approximately 80 W/channe

Controls, Front Panel

Power On/Off

Controls, Rear Panel

Auto Standby: On/Off switch, Output: Stereo/Mono switch, Mute, Output trims, Remote



Mains Voltage

100 VAC - 240 VAC (±10%, 50/60 Hz)

AC Power Consumption

21 W (Standby), 350 W (Max)

Mains Connector

Standard IEC (C14)

Maximum Inrush Current

5.0 Amps (230 VAC / 50 Hz), 2.7 Amps (120 VAC / 60 Hz)

Overload Protection

High temperature, output short, excessively low or high AC line voltage




1.7" H x 19.0" W x 12.8" D (44 mm H x 483 mm W x 324 mm D)

Shipping Weight

11.5 lb (5.2 kg)

Net Weight

8.5 lb (3.9 kg)

Cooling System

Single fan, continuous left-to-right air flow



Inputs (Control)

Remote input for Volume Control (PC041966), Mute input control via a normally open contact closure