Bose FreeSpace ZA 250-LZ
Bose FreeSpace ZA 250-LZ zone amplifier (Product Code 344872-1420)
Bose FreeSpace ZA 250-LZ zone amplifiers are designed to provide basic amplification and sound system expansion when using front-end signal processing from products such as the FreeSpace IZA 250-LZ / IZA 190-HZ integrated zone amplifiers, the FreeSpace 4400 business music system and ControlSpace® engineered sound processors.
Premium sound quality from a reliable, high quality Class-D amplifier designed to expand sound systems for loudspeaker installations
Expandable amplification allows for easy system expansion when coupled with a FreeSpace IZA 250-LZ integrated zone amplifier. The two amplifiers will function together as one system
Compact, lightweight design enables the FreeSpace 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
Two models available, 4/8 Ω or 70/100 V output, allow for better fit options for specific installations
- Retail stores
- Restaurants and bars
- Hospitality venues
- Conference centers
- Auxiliary zones
Architects’ and Engineers’ Specifications
The amplifier shall employ Class-D amplification topology. The amplifier shall incorporate a switch-mode power supply allowing normal operation from AC outlets ranging from 100 – 240 V (+/- 10%) at 50/60 Hz. The amplifier shall have an IEC 320-C14 electrical power inlet and shall be equipped with a removable power supply cord. A power switch shall be located on the front panel. The product shall include protection from shorted loads and general overheating. The amplifier’s physical size shall be 1 RU in height by 1/2 RU in width and be capable of rack mounting using an accessory kit. Two models shall be designed to be rack mounted together horizontally to combine for a full 1 RU installation. The product shall have venting appropriate for natural convection without fans. The amplifier section shall have two amplifier configurations offered in two separate models. Each output channel shall have output trim controls.
The low impedance model shall have two output channels with a frequency response of 20 Hz to 20 kHz (+0/-3 dB) and drive 4 ohm loads at 50 watts continuous power or 25 watts per channel continuous power into 8 ohm loads. The low impedance model shall have THD+N at full-rated power less than or equal to 0.3%. Output connection shall be made via two terminal strips that accommodate 22-14 AWG wires using included spade lug connectors.
The high impedance model shall have a single output channel with a frequency response of 60 Hz to 20 kHz (+0/-3 dB) and drive 70/100 V distributed audio systems. The low impedance model shall have THD+N at full-rated power less than or equal to 1%. Output connection shall be made via a 3-pin Euroblock connector.
Both models shall meet or exceed the following performance specifications: channel separation (crosstalk) less than or equal to -60 dB below rated power at 1 kHz and dynamic range of 88 dB. The amplifier shall incorporate one set of line-level inputs (two RCA stereo) with a nominal input sensitivity of 0 dBV. The rear panel shall contain a stereo/mono switch that allows optimization of the amplifier output (low impedance model only) when using a mono source. The front panel shall have a power switch and an LED (blue) for power indication.
The amplifier chassis shall be constructed of painted steel. The dimensions of the amplifier shall allow for 19-inch (483 mm) EIA standard rack mounting using the optional rack mounting kit accessory. The amplifier shall be 1.8 inches (45 mm) in height, 8.4 inches (214 mm) in width, and 11.9 inches (302 mm) in depth. The low impedance model shall weigh 4.4 pounds (2.0 kg). The high impedance model shall weigh 6.7 pounds (3.0 kg). The amplifier shall be the Bose FreeSpace ZA 250-LZ (or ZA 190-HZ) zone amplifier.
2 x 50 W @ 4 Ω, 2 x 25 W @ 8 Ω
1 x 90 W @ 70/100 V
FreeSpace® ZA 250-LZ zone amplifier: 20 Hz – 20 kHz (+0/-3 dB, @ 1 W reference 1 kHz)
FreeSpace® ZA 190-HZ zone amplifier: 60 Hz – 20 kHz (+0/-3 dB, @ 1 W reference 1 kHz)
FreeSpace® ZA 250-LZ zone amplifier: ≤0.3 % (at full rated power)
FreeSpace® ZA 190-HZ zone amplifier: ≤1 % (at full rated power)