People who search for Yamaha generator decibels usually find a range, such as 57 to 65 dBA, and no explanation. Yamaha sells six generator lines in the US, and it publishes a noise figure for all six. This page lists every one, explains what Yamaha's numbers mean, and ranks them only where the load and distance match.
All figures come from Yamaha's US product pages and its US owner's manuals, read on October 4, 2026. For how Yamaha sits beside other brands, see our guide to the quietest generators for camping. For a maker that publishes the same kind of two-load figure, see our Honda generator decibels page.
Our picks are listed above, with full specifications for each.
Yamaha's US spec pages have a row headed "Noise Level (1/4 Load - Rated Load)". For the EF2200iS it reads "57 - 65 dBA". The spec pages do not say how far away that was measured, and that missing distance is why Yamaha's figures have been hard to compare.
The owner's manuals fill the gap. Every current Yamaha manual gives its figure in "dB (A)/7 m", with this footnote: "The noise level in 'dB (A)/7 m' is the arithmetic mean value in four directions measured 7 meters away from each side of the generator. The noise level may vary in different environments." Each manual also says the noise level "is measured when the economy control switch is turned to" ON.
So a Yamaha figure is A-weighted sound pressure, averaged around all four sides, at 7 meters, which is about 23 feet, with the economy control on. Our dBA explainer covers the A-weighting. Seven meters is roughly the far side of a campsite, or the gap between a generator and the neighbor's fence.
The manuals give a second number too, in "dB/LWA". Yamaha says "LWA shows the sound power level under the ISO3744 satisfied test conditions." Sound power is the total noise the machine gives off, and has no distance attached. It is a different quantity from the 7 meter figure, and our explainer on sound power and sound pressure explains why the two are never compared.
Yamaha's US generator page lists six lines. Here is every figure Yamaha publishes for each, in its own words:
- EF2200iS: spec page "57 - 65 dBA"; manual "92 dB/LWA, 57-65 dB (A)/7 m".
- EF3000iS and EF3000iSEB: spec page "54.5 dBA"; features page "Very quite 54.5-61 decibels"; manual "85.5" dB/LWA and "54.5-61.0" dB (A)/7 m.
- EF4500iSE: spec page "58 - 60 dBA"; features page "Very Quiet 58 - 64 decibels"; manual "89.5" dB/LWA and "65-68" dB (A)/7 m.
- EF6300iSDE: spec page "58 - 64 dBA"; features page "Very Quiet 58 - 64 decibels"; manual "93" dB/LWA and "58-64" dB (A)/7 m.
- EF5500DE and EF5500D: spec page "74.1 dBA"; manual "99.4" dB/LWA and "74.1" dB (A)/7 m.
- EF7200DE and EF7200D: spec page "74.5 dB"; manual "100.0" dB/LWA and "74.5" dB (A)/7 m.
The manuals print each range with a dash we have replaced with a hyphen, and the EF3000iS features page really does say "quite". For the ranking below, we read the first number in each range as the 1/4 load figure and the second as the rated load figure, as the spec page heading says.
The inverters at the 1/4 load end
These are the quiet-end figures from the manuals, at 7 meters with the economy control on. Quietest first:
- EF3000iS and EF3000iSEB: 54.5 dB(A)
- EF2200iS: 57 dB(A)
- EF6300iSDE: 58 dB(A)
The gaps are small. The 2.5 dB(A) between the EF3000iS and the EF2200iS is a modest difference at the same load and distance. Roughly every 10 decibels sounds about twice as loud; our decibel chart puts these levels beside everyday sounds.
The inverters at rated load
These are the loud-end figures, with each generator delivering its full rated output, at 7 meters. Quietest first:
- EF3000iS and EF3000iSEB: 61.0 dB(A)
- EF6300iSDE: 64 dB(A)
- EF2200iS: 65 dB(A)
The order changes here. The smallest Yamaha, the EF2200iS, is the loudest of the three at full stretch, 1 dB(A) above the EF6300iSDE, which makes three times the power. A small engine working flat out is busy; a big engine at its rated output is less strained. If you need about 1,800 watts all the time, a bigger generator running gently may be the quieter choice.
The EF4500iSE is the one Yamaha we cannot place. Its spec page says "58 - 60 dBA". Its features page says "58 - 64 decibels", the same text as the EF6300iSDE page. Its manual, the third edition of November 2023, says "65-68" dB (A)/7 m. The 7 meter figures in the manual are 7 to 8 dB(A) above the spec page's, a big difference. Until Yamaha reconciles them, we treat the EF4500iSE as somewhere between 58 and 68 dB(A) and leave it out of both lists. If you are planning around it, assume the higher figure.
The EF5500DE and EF7200DE are what Yamaha calls "Dual voltage, Brushless, AC Generator", not inverters. Each gets one figure at 7 meters: 74.1 dB(A) for the EF5500 and 74.5 dB(A) for the EF7200. The spec pages put that single figure under the "1/4 Load - Rated Load" heading, and the manuals say only that it was taken with the economy control on. Neither says which load.
So we do not rank these two against the inverters, and we do not rank them against each other as if the load were known. What we can say is that 74.1 and 74.5 dB(A) sit in the 70 to 84 dB band of our decibel chart, where it lists a vacuum cleaner at around 70 dB. The EF7200 spec page shows its figure as plain "dB", without the A; the manual says "dB (A)/7 m".
The economy control switch, in Yamaha's words
Five of the six current Yamaha manuals describe an economy control switch in their controls section; the EF4500iSE manual mentions it only in its noise footnote. Every Yamaha noise figure assumes it is on. The EF2200iS manual puts the case plainly: "In order to reduce fuel consumption and operating noise, use the economy control switch." With it on, "the economy control unit regulates the engine speed according to the connected load. The results are better fuel consumption and less noise." With it off, "the engine runs at the rated speed (4900 r/min) regardless of whether a load is connected or not."
The product pages give it different names. The EF2200iS page calls it "Yamaha Smart Throttle" and the EF6300iSDE page "Smart Throttle", which that page says "Automatically adjusts engine speed to match power demand, reduces noise and fuel consumption." The EF5500 and EF7200 pages call it "Economy Mode", which "Determines load to adjust engine speed, helps reduce fuel consumption", with no mention of noise.
Each of those five manuals has the same exception. Yamaha says "The economy control switch must be turned to OFF when using electric devices that require a large starting current, such as a compressor or a submersible pump." So if you run a well pump or an air compressor, expect it louder than the figure on the page. On the EF3000iSEB, Yamaha's answer for starting loads is Boost Technology instead, which it says "Senses when power is needed for start up of air conditioners, power tools, and other equipment."
Noise Block, Twin Tech and other quiet features
Yamaha's features pages credit a "Noise Block Sound Reduction System" on the EF3000iS/iSEB, EF4500iSE and EF6300iSDE. Yamaha gives no description beyond the decibel range next to it. The EF2200iS page lists "Twin Tech", which "Connects two EF2200iS models"; the manual says not to parallel "Yamaha generators of different outputs or a Yamaha generator with any other brand." Yamaha publishes no noise figure for two units running together, and we do not add the figures up.
What changes the noise between Yamaha models
- Inverter or conventional. Yamaha's inverter figures run from 54.5 to 68 dB(A) at 7 m across the two loads. The two conventional models list one figure each, 74.1 and 74.5, with no load stated, so we keep the two types in separate groups.
- Size within the inverters. Not as much as you might expect. The 2,800 watt EF3000iS is quieter at both ends than the 1,800 watt EF2200iS, and the 5,500 watt EF6300iSDE is quieter at rated load.
- Load. The gap between the two ends runs from 6 dB(A) on the EF3000iS and EF6300iSDE to 8 dB(A) on the EF2200iS. Sizing up and running at a quarter load buys more quiet than any feature.
Safety comes before noise
It is tempting to box a generator in to quiet it. Don't. The EF2200iS manual says "NEVER use inside a home or garage, EVEN IF doors and windows are open" and "Only use OUTSIDE and far away from windows, doors, and vents." The EF6300iSDE manual asks for "at least 1 m (3 ft) from objects or other equipment" to prevent overheating. Every current Yamaha lists a CO Sensor, which Yamaha says shuts the engine off "if a high level of carbon monoxide is detected". Treat it as a backstop, not a reason to move the generator closer. For placement and 240 V models from other makers, see our guide to quiet generators for home backup.
What we left out
Yamaha's older EF1000iS, EF2000iSv2 and EF2800i are no longer on its US generator page, so we do not cover them here. Yamaha's US site shows no MSRP for any generator, so no prices are quoted; check a dealer.
We did not measure any of these generators. Every figure on this page is Yamaha's own, from its US product pages and US owner's manuals as read on October 4, 2026, quoted with the load and distance Yamaha gives, and with a note wherever it gives none or gives two.
