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SA255

SA255

Monaural Subwoofer Amplifier

The Stealth Acoustics SA255 is an integrated monaural subwoofer amplifier / crossover system designed as a low distortion power source for Stealth Acoustics wall or ceiling mounted, invisible subwoofer panels or other un-powered speakers. Intended for whole house audio or home theater bass applications, the SA255 may stack with other components or mount in a standard 19” equipment rack requiring only two RU spaces (3-1/2”). Removable rack mount ears are provided. The SA255 delivers a solid 250 watts into an 8Ω load and 350 watts into 4Ω. A variable low pass, 18db per octave filter allows for infinite crossover points from 50Hz to 100Hz.

With a full complement of input and output connectors, the SA255 is easily integrated into any audio system. Inputs include RCA line level, balanced XLR line level, and phoenix connector speaker level, all with pass-through capability. The speaker level input/pass-through connections allow the SA255 to feed directly from full-range speaker lines, anywhere in the system. The SA255’s amplifier output connection is via a 5-way binding post designed to accept heavy gauge speaker wires. A selectable automatic turn-on feature activates the amplifier only when audio signals are present. Other features include an internal, quiet, 8-stage cooling fan that automatically engages as required.

Front panel controls include volume control, variable low pass filter, phase control, power switch and six power output monitor LED’s. Rear power controls consist of filter bypass switch for full range operation, no signal mute switch and 3-position panel graphics control switch. 115VAC and 230VAC input line voltages are selectable, via a rear panel switch.

The Stealth Acoustics SA255 subwoofer amplifier is covered by a 2-Year manufacturer’s warranty.

Product Description

Features and FunctionsRack Mountable
(2) RU spaces: 3-1/2” (89 mm)(Provided rack ears are removed)DC Protected
Fixed high pass filter @ 18Hz

Variable Low Pass Filter
50 to 150Hz / 18 dB per octave

Power Standby LED
Red (blue when system is active)

Auto On/Standby Function
Switch selectable on/off

Flexible Inputs with Pass Through
Binding post speaker level inputs / outputsRCA line level inputs / outputs

XLR balanced line inputs / outputs

Amplifier Output Connector
5-way binding post

Output monitor LED’s
6 level readings

Phase Switch
Low Pass Filter on/off Switch
Fan Cooled
Automatic – 8 speed stages

110v and 220v Input Voltages
Specifications
Mono Power Output
250 watts @ 8 < 0.05 THD

350 watts @ 4 < 0.05 THD

Total Harmonic Distortion
<0.05 @ 1 watt 4 / 100Hz

Signal to Noise Ratio
86 dB below rated output

Crossover Section
Low Pass Filter: 50Hz – 150Hz / 18 dB per octave (variable with bypass switch)

High Pass Filter: 18Hz / 30 dB per octave (fixed)

System Impedance
8Ω nominal – 4Ω minimum

Current Draw
6.2A @ 350W/4 – 115VAC/60Hz

Dimensions
Width: 19” (482 mm)

Height: 3-1/2” (89 mm) – without feet

Depth: 13-5/8” (346 mm)

Finish
Black anodized aluminum

Product Weight
31.3 Lbs. (14.20 kg)

Shipping Weight
32.5 Lbs. (14.74 kg)

Included Accessories
Removable power cord

Removable rack ears

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