Unfortunately, wattage ratings, particularly those posted by JBL, Roland, and a few others, rarely list power consumption, though Roland does list this under the specifications. Here's the specs from the User Manual of the JBL One:
21Section 7: System Specifications
System
Type:Self-powered, two-way, 8” woofer, 1” tweeter
Sensitivity (SPL):112 dB
Frequency Response: 37.5 Hz – 20 kHz
Bluetooth:
Audio streaming and full control; range: 10 m (30 ft)USB:2x external charging ports: port 1 = 5V, 2A; port 2 = 5V, 1A
Amplifier
Power Rating: 150W peak
Mixer
Mixer:4 channels
Inputs:2x XLR/TRS combo jacks, 1x 1/4” Hi-Z, 1x 1/8” aux
Outputs:1x 1/8” headphone, 1x 1/4" pass thru
Effects:Reverb, delay, chorus
Battery
Battery Charge Time:2.5 hours with no signal, 6 hours with signalBattery Life:Up to 12 hours
Speaker
Coverage Pattern: 100º x 60ºNet Weight: 8 kg (17.63 lb)
Dimensions (L x W x H): 291 x 255 x 399 mm(11.46 x 10.04 x 15.71
If the manual were to list the actual power consumption, amps and volts consumed, then you can easily use OHM's Law and determine the actual wattage, which is the only true method of wattage measurement for amps, and of course, any other electronic or electrical device. Peak wattage, which could possibly only be produced for a micro-second, which the human ear cannot detect, is just about as useful teats on a bull.
Additionally, take note of the coverage pattern, which is just slightly more than a conventional speaker, at 100-degrees, horizontal X 60-degrees, vertical.
In contrast, the Bose L1 Compact has a 180-degree horizontal coverage area, with virtually no falloff within 50 feet and less than 10 percent at 100 feet (if my memory serves me correctly). Conventional speakers have significantly more falloff, usually about 25-percent at 50 feet, and as much as 50 percent at 100 feet.
When I was on stage, falloff was always a big issue with me until I went to the Bose vertical array systems. When I performed at larger venues, large ballrooms, etc..., the folks sitting close to the stage were exposed to ear bleed volumes so those at the back end of the venue could hear normal volumes. This problem was completely eliminated when I went to the Bose vertical array systems, beginning with the Bose L1 PAS system, which I purchased a day after hearing Uncle Dave perform with his at a Philadelphia Italian Restaurant. That system was rated at 1000-watts RMS, plus a 250-watt, 10-inch, long-throw subwoofer. It was absolutely awesome, both indoors and outdoors and could handle huge venues with ease.
Hope this helps,
Gary
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