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Ryobi 300 watt inverter with 40 Volt 4Ah battery:
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Decible Meter:
Electro Voice EKX 15sp:
Electro Voice EKX 12P:

In this video, John tests the Ryobi 300 watt inverter powering three Electro Voice speakers. In the demonstration, the inverter powers two subwoofers and one full range top speaker for over an hour at a peak volume of 107 decibels. The inverter worked when the ‘running’ wattage draw was under 100 watts playing pop music. Heavy bass music would cause the subwoofers to over-draw the inverter and it would shut down. The volume of the test was more than adequate for most background/back yard parties or wedding ceremonies for up to 1 hour.

The RYOBI 40-Volt Power Source provides convenient, on-the-go power both on and off the jobsite. With 300-Watt of continuous output, this inverter is perfect for powering laptops, tablets, cell phones and other small electronics. This compact and lightweight design is compatible with all of your existing RYOBI 40-Volt batteries making endless power even easier. Equipped with 1 USB-A outlet, 1 USB-C outlet and one 120-Volt wall outlet for convenient and reliable power. This 4.0 Ah battery lasts 2x longer than the standard RYOBI 40-Volt high capacity battery while delivering the same fade-free power and performance. All RYOBI 40-Volt batteries come with an on-board battery life indicator for user convenience and over-molded edges for impact protection. This battery works with all RYOBI 40-Volt tools and chargers. Charger not included.
Inverter: fits all RYOBI 40-Volt batteries
Inverter: battery and charger not included
Inverter: 300-Watt of continuous output
Inverter: outlet types: 1 USB-A outlet, 1 USB-C outlet and one 120-Volt wall outlet
Inverter: external LED light
Battery: works with all RYOBI 40-Volt lithium-ion tools and chargers
Battery: 40-Volt 4.0 Ah high capacity battery for extended run time
Inverter: 5-year warranty
Battery: 3-year limited warranty
Models included: RYi300BG and OP4040A1
Charger sold separately