The OWI AMP1SGRN is a self-powered speaker/amplifier. The AMP1SGRN is UL Listed, Energy Verified, Energy Star audio product. This unit can drive up to four speakers connected series parallel to have a net impedance of 8 ohms. With an included UL Listed, Level 5 (Energy Star), 15 volt, 3.5 ampere power supply, the amplifier can output 32 watts, or 8 watts per speaker in a four speaker hook-up.
If no audio is present on any input for a factory set delay time of 2 minutes, the amplifier goes into a low power "shutdown" mode and power consumption of the speaker amplifier is less than one (1) watt to save energy (delay time is changeable).
Three Audio Inputs ![]()
"Normal" input is through a balanced input screw terminal and also accepts mono or stereo inputs. "Line Level" input can range from -20dBu to 0dBu. "Mic. Level" input can be -40dBu.
Priority Override Feature
The Priority input accepts balanced input levels of 100 volts, 70 volts, 25 volts and 1 volt audio. The input is muted during Priority Override, for example when using an infrared microphone. After the Priority audio stops, the unit waits a selectable time delay from 5 to 60 seconds.
Self Test Feature
The AMP1SGRN self tests by looking for a disconnected speaker string or otherwise high impedance. The self test occurs pressing a manual button.
![]()
Infrared Wireless Microphone Input
A 3.5mm connector is available to connect an infrared receiver which picks up an infrared signal from a wireless microphone. As mentioned above, the wireless microphone is interrupted by priority audio.
Balanced Line Level Output
A nominal 0dB level, balanced output is available through the Master Volume control which is located under the speaker grill.
Power Amplifier Features
The power amplifier outputs 32 watts total into 8 ohms and 15VDC power. It has reduced electromagnetic interference (EMI) by operating in a patented spread spectrum and it shuts down to protect itself from over-temperature, over-current and over-voltage conditions