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For background/foreground music and paging applications, the Bose Professional FreeSpace IZA 250-LZ and IZA 190-HZ integrated zone amplifiers are designed to deliver premium sound, provide simplified set up and easy daily operation, and offer the flexibility to expand when more loudspeakers are required. When used with FreeSpace FS2 and FS4 loudspeakers, even further sound optimization is possible through onboard selectable EQ presets.
Amplification for premium sound from a reliable, high quality Class-D amplifier provides optimized performance and premium sound quality through the use of internal digital signal processing
Installation made simple with set up done locally from the front and rear panels of the amplifier—no computer is required
Opti-Voice paging provides smooth automatic transition between the music and page signals
End-user friendly front panel allows users to connect devices easily, make tonal adjustments or select between two sources. Optional wall mountable Bose Professional Volume control with A/B switch user interface allows volume and source selection controls to be placed away from the amplifier for user convenience
Compact, lightweight design enables the FreeSpace integrated zone amplifier to be placed out of the way—on a table, desk, counter, shelf or in an equipment rack using the optional Rack Mount Kit accessory
Designed for a wide range of applications, including:
Retail stores
Restaurants and bars
Hospitality venues
Conference centers
Schools
Auxiliary zones
Channel Separation (Crosstalk)
≤ -60 dBV below rated power, 1 kHz
Dynamic Range
88 dB
Frequency Response
40 Hz – 20 kHz (+0 dB/-3 dB) at 1 W, 1 kHz reference
Number of Channels
2
Power Class
Class D
Rated Power, Symmetrical
50 W per channel at 4 Ω / 25 W per channel at 8 Ω
THD+N
≤ 0.3% at full rated power
Adjustment Range
-20 dB to +20 dB, line / 0 dB to +50 dB, mic/line / 0 dB to +50 dB, page / fixed, auxiliary
Input Channels
2 unbalanced, line + 1 balanced, mic/line + 1 balanced, mic (page) + 1 unbalanced, line (auxiliary)
Connectors
(1) RCA stereo pair, (1) XLR-1/4-in combo, (1) 4-pin Euroblock, (1) 1/8-in (3.5 mm) TRS
Input Impedance
20 kΩ, line / 2 kΩ, mic/line / 2 kΩ, page / 20 kΩ, auxiliary
Input Range
-10 dBV to +10 dBV, line / -60 dBV to +10 dBV, mic/line / -60 dBV to +10 dBV, page / 0 dBV to +10 dBV, auxiliary
Maximum Input Level
+10 dBV
Nominal Input Level
0 dBV, line / -40 dBV, mic/line / -40 dBV, page / 0 dBV, auxiliary
Sensitivity
0 dBV, auxiliary / N/A, line, mic/line, page
Channels
(1) 2-terminal barrier strip, (1) RCA stereo pair
Nominal Output Level
2 × 50 W at 4 Ω minimum / 0 dBV maximum (auxiliary)
Output Impedance
4 Ω / 400 Ω (auxiliary)
Current Draw, Inrush
7.6 A at 120 VAC, 60 Hz / 13.9 A at 230 VAC, 50 Hz
Mains Connector
IEC C14 inlet
Mains Voltage
100–240 VAC (±10%), 50/60 Hz
Protections
High temperature, short circuit
AC Power Consumption
15 W idle, 200 W maximum
Controls, Front Panel
(1) power switch, (1) input selection switch, (1) treble knob, (1) bass knob, (1) mic/line gain knob, (1) master level knob
Controls, Rear Panel
Amplifier Mode DIP switch, Loudspeaker EQ preset selector, Input Gain (A/B/Page mic), Output trim
LED Status Indicators
(1) power LED, (1) input clip LED
A/D and D/A Converters
48 kHz / 24-bit
Audio Latency
10.4 ms (analog input to analog output)
Presets
Flat, Bose Professional loudspeaker presets (FreeSpace FS2C/FS2P/FS2SE/FS4CE/FS4SE)
Processing Functions
Loudspeaker EQ, Opti-Voice EQ (paging), Dynamic EQ (low-end compensation)
Cooling System
Natural convection
Net Weight
4.8 lb (2.2 kg)
Product Dimensions (H×W×D)
1.8 in × 8.4 in × 12.2 in (45 mm × 214 mm × 310 mm)
Rack Spaces
1 RU high, half rack wide
5 years
(1) 2-pin Euroblock connector
(1) 4-pin Euroblock connector
(1) FreeSpace IZA 250-LZ amplifier
(1) owner’s guide
(1) power cord
(4) feet with pins
(8) spade lug connectors
The FreeSpace IZA 250-LZ / IZA 190-HZ integrated zone amplifier provides signal processing, routing, paging and amplification for a wide range of commercial applications such as retail stores, restaurants and bars, hospitality venues, conference rooms, schools and auxiliary zones. The integrated zone amplifier offers a variety of easy-to-use input connections (mic/line/page), input gain and output level adjustments, and operational modes. Built-in FreeSpace FS2 and FS4 loudspeaker EQ presets can be selected for loudspeaker optimization.
With a switch on the rear panel, selectable Bose Professional loudspeaker EQ presets optimize performance of FreeSpace FS2 and FS4 loudspeakers
Bose Professional Dynamic Equalization circuitry automatically adjusts tone based on the output level to maintain tonal balance at all volume levels
Opti-Voice paging automatically provides a smooth transition between music and page signals
System set up is done locally from the front and rear panels. No computer required
Four rear panel DIP switches offer flexible operation modes: Page Normal/Bypass Master, Output Mono/Stereo, Front Mic Mix/Duck, Aux Out EQ/Flat
Five inputs: two stereo line inputs, one mic/line input, one page input and one auxiliary stereo line input
Input source levels can be adjusted with independent gain controls
Output level (trim) controls available for adjusting individual channel outputs relative to the overall master level
Source select and master output level can be easily controlled from the front panel
Volume control with A/B switch enables access to amplifier volume level and source selection from remote locations
Front panel allows for quick connection of hand-held microphones via an XLR/TRS combination connector
Auxiliary input on front panel allows quick connection with mobile devices
Fine tune the sound with front panel treble and bass tone control knobs (±6 dB @ 100 Hz and 7 kHz)
Amplifier outputs can be muted remotely via a contact closure
High- and low-impedance models available. Choose between 2 channels each at 50 watts (model IZA 250-LZ, 4Ω ) or 1 channel at 90 watts (model IZA 190-HZ, 70/100V systems) for loudspeaker installations
Compact, lightweight design. Place unit out of the way—on a table, desk, counter or shelf
Easily install single amplifier—or two amplifiers side-by-side—in a 1 RU rack with optional Rack Mount Kit accessory
Natural convection design—no fan noise
The IZA 250-LZ comes with an amplifier unit, AC power cord, plastic feet with locking pins (4), installation and operating guide, 4-pin Euroblock, 2-pin Euroblock, 4 blue spade lugs (16–14 AWG) and 4 red spade lugs (22–16 AWG). The IZA 190-HZ comes with an amplifier chassis, AC power cord, plastic feet with locking pins (4), installation and operating guide, and 4-pin Euroblock connector.
The unit does not come with rack ears in the box. For rack-mounting applications, a separate Rack Mount Kit is available which comes with hardware to mount one or two amplifiers in a 1 RU space. It also comes with link brackets for affixing two amplifiers side by side.
The IZA integrated zone amplifier features a fixed global compressor/limiter, FreeSpace FS2 and FS4 loudspeaker equalization presets, dynamic equalization, Opti-Voice paging, detection and prioritization algorithms, and AGC (Automatic Gain Control).
The IZA integrated zone amplifier can easily be adjusted using front and rear panel controls. Source selector and master volume control, located on the front panel, allow a customer to adjust their system for daily operation. Bose Professional ControlCenter CC-2 zone controllers provide volume and A/B source selection for FreeSpace and ControlSpace products.
Connections can easily be made to the front and rear panels. No computer is required. The amplifier comes with plastic feet for surface placement. An optional Rack Mount Kit accessory is also available to mount one or two amplifiers in a standard mounting rack.
The FreeSpace IZA integrated zone amplifier is designed to provide optimized performance of FreeSpace FS2 and FS4 loudspeakers. A simple switch allows the selection of either loudspeaker, or a generic high-pass mode for use with other passive loudspeakers.
The integrated zone amplifier system will reboot when the power returns and audio will resume.
IZA 250-LZ
Amplifier power: 2 × 50 W @ 4 Ω; 2 × 25 W @ 8 Ω
Frequency response: 40 Hz – 20 kHz (+0/-3 dB, @ 1 W reference 1 kHz)
Output channels and connectors: 2 ch/zones, 2-terminal barrier strips
THD+N: ≤ 0.3% (at full-rated power)
Input channels and connectors
Line: 2 unbalanced RCA pair
Mic/line: 1 balanced combo XLR – 1/4-inch (6.5 mm) TRS
Page: (1) 4-pin Euroblock
Auxiliary: 1 unbalanced 1/8-inch (3.5 mm) TRS
IZA 190-HZ
Amplifier power: 1 × 90 W @ 70/100 V
Frequency Response: 60 Hz – 20 kHz (+0/-3 dB, @ 1 W reference 1 kHz)
Output Channel and Connectors: 1 channel, 3-pin inverted Euroblock
THD+N: ≤ 1% (at full-rated power)
Input Channels and Connectors
Accessories for the FreeSpace IZA include: Rack Mount Kit (PC 353689-0410), ControlCenter CC-1 and CC-2 zone controllers
There are 5 variants available for each model:
FreeSpace IZA 250-LZ integrated zone amplifier
US 120V product code: 344871-1420
AU 240V product code: 344871-2420
Japan 100V product code: 344871-3420
EU 230V product code: 344871-4420
UK 230V product code: 344871-5420
FreeSpace IZA 190-HZ integrated zone amplifier
US 120V product code: 344871-1410
AU 240V product code: 344871-2410
Japan 100V product code: 344871-3410
EU 230V product code: 344871-4410
UK 230V product code: 344871-5410
Front-panel controls on the IZA 250-LZ and IZA 190-HZ are identical and include the following:
POWER SWITCH – ON/OFF AC power
POWER – LED indicates if unit is active
INPUT CLIP — LED indicates when any input source approaches the threshold value of -3 dBFS
MIC/LINE INPUT – Combination XLR-TRS connector for use with dynamic microphones
MIC/LINE INPUT GAIN – Allows gain adjustment (0 dB to +50 dB) of microphones connected to the MIC/LINE INPUT
AUX INPUT – 1/8-inch (3.5 mm) stereo line-level input connector. Connection mutes INPUT A and INPUT B for priority override
INPUT A/B* – Allows selection of rear line-input channels A or B
TREBLE/BASS – Allows tonal adjustments of output channels. Provides ±6 dB adjustment at 7 kHz and 100 Hz
MASTER LEVEL* – Controls the overall system volume for both the loudspeakers and the variable AUX OUT connector
* When using a REMOTE connection with the system, the INPUT A/B selector switch and MASTER LEVEL control become disabled.
INPUT A/B – Two channels of stereo RCA input connectors
INPUT GAIN – Allows for -20 dB to +20 dB of adjustment to each INPUT A/B input
PAGE INPUT – Euroblock mic/line input with trigger contact closure for use with push-to-talk microphones
PAGE INPUT GAIN – Allows for 0 dB to +50 dB of gain control of page input signal
DIP switches – A bank of four switches set the amplifier configuration
REMOTE – Input jack for Volume control with A/B switch
AUX OUT – Variable output line-level signal for routing signal to additional audio equipment
EQ – Provides loudspeaker equalization presets for the FreeSpace FS2 and FS4 loudspeakers. Can be set to high-pass filter (HPF) for a flat response
MUTE – Contact closure connection that upon trigger (short) will mute all outputs (including AUX OUT)
OUTPUT 1 / OUTPUT 2 TRIM – Allows for up to 20 dB attenuation of the individual loudspeaker outputs relative to the master level
OUTPUT – Speaker connections for up to two 4Ω or 8Ω loudspeaker loads (IZA 250-LZ) or one 3-pin Euroblock for 70/100 V systems (IZA 190-HZ)
AC Mains receptacle — AC line voltage input
The Limited Warranty for Professional Systems products lasts five years from the date of purchase for the IZA integrated zone amplifier.
The IZA amplifier is appropriate for use in many applications including retail stores, restaurants and bars, hospitality venues, conference rooms, schools and auxiliary zones for large sound systems.
Four rear panel DIP switches offer flexible operation modes:
PAGE-MIC NORMAL / BYPASS MASTER: determines if the page input source will follow the master level output, or be set at independent fixed output level to ensure announcements are heard
OUTPUT MONO / OUTPUT STEREO: adjusts the AUX and loudspeaker outputs for mono or stereo input signals
FRONT MIC MIX / FRONT MIC DUCK: determines if front panel microphone input will be mixed in with the music source or if the music output level will be automatically lowered (ducked) when someone speaks into the microphone
AUX OUT EQ / AUX OUT FLAT: determines if AUX OUT will have a selected loudspeaker EQ preset applied to it or not. Allows for optimization of FreeSpace DS 16 and DS 40 loudspeakers when used with an additional zone amplifier
Bose Professional Dynamic EQ is a DSP function that automatically adjusts equalization based on the output to maintain tonal balance at all volume levels.
Opti-Voice paging uses DSP to automatically provide a smooth transition between music and paging signals.
No. All set up is done locally from the front and rear panels.
This control switch, located in the rear panel DIP switch bank, adjusts the gain of the amplifier’s AUX and loudspeaker outputs for a mono or stereo input signals. Use MONO when your source has only one RCA channel attached to either INPUT A or INPUT B. Use STEREO when both RCA connectors are used.
The amplifiers are fully protected against loudspeaker output shorts, high temperature damage, and excessively low or high AC line voltage conditions. The IZA 2120-HZ also has an integrated 55 Hz high pass filter to avoid potential transformer saturation.
No. This product must be used indoors. It is neither designed nor tested for use outdoors, in recreational vehicles or on boats.
Yes. The IZA 250-LZ has two output channels and individual output trim controls. It can be used as a dual-mono amplifier/mixer. Paging signals however, will run to both zones when used in this fashion.
The IZA amplifier does not supply phantom power for use with condenser microphones. The IZA 250-LZ / IZA 190-HZ will support low impedance signals from dynamic microphones.
