entertainment · 40W typical
Running a powered bookshelf speakers costs about $1.19/month.
That's the typical powered bookshelf speakers at 40W, run 6 hours a day at the US-average rate of 16.5¢/kWh. Change any of those and the number moves — use the calculator below to see yours.
Estimated cost
Full-power draw for 6 hours at 16.5¢/kWh.
How you use it
Cost shifts with how long it's on.
The same powered bookshelf speakers can cost very different amounts depending on usage patterns. Three common scenarios, at the US-average rate.
desk listening
$1.19
per month
work-hours music
living room
$0.59
per month
evening listening
Where you live
$2.15 spread between the cheapest and priciest states.
Same appliance, same hours of use, different zip code — the monthly cost varies this much.
| State | Rate | Monthly | Yearly |
|---|---|---|---|
| Hawaii | 41.2¢ | $2.97 | $36.09 |
| California | 31.4¢ | $2.26 | $27.51 |
| Massachusetts | 30.8¢ | $2.22 | $26.98 |
| Connecticut | 28.7¢ | $2.07 | $25.14 |
| Rhode Island | 27.9¢ | $2.01 | $24.44 |
| New Hampshire | 24.6¢ | $1.77 | $21.55 |
| Alaska | 24.3¢ | $1.75 | $21.29 |
| New York | 22.3¢ | $1.61 | $19.53 |
| Maine | 22.1¢ | $1.59 | $19.36 |
| Vermont | 21.5¢ | $1.55 | $18.83 |
| Michigan | 19.3¢ | $1.39 | $16.91 |
| New Jersey | 19.1¢ | $1.38 | $16.73 |
| Maryland | 18.4¢ | $1.32 | $16.12 |
| Pennsylvania | 18.1¢ | $1.30 | $15.86 |
| District of Columbia | 17.8¢ | $1.28 | $15.59 |
| Wisconsin | 17.4¢ | $1.25 | $15.24 |
| Delaware | 17.2¢ | $1.24 | $15.07 |
| Illinois | 16.9¢ | $1.22 | $14.80 |
| Ohio | 16.6¢ | $1.20 | $14.54 |
| Nevada | 16.3¢ | $1.17 | $14.28 |
| Indiana | 15.8¢ | $1.14 | $13.84 |
| Virginia | 15.7¢ | $1.13 | $13.75 |
| Minnesota | 15.6¢ | $1.12 | $13.67 |
| Colorado | 15.4¢ | $1.11 | $13.49 |
| Alabama | 15.2¢ | $1.09 | $13.32 |
| West Virginia | 15.2¢ | $1.09 | $13.32 |
| Florida | 15.1¢ | $1.09 | $13.23 |
| New Mexico | 14.8¢ | $1.07 | $12.96 |
| Texas | 14.8¢ | $1.07 | $12.96 |
| Arizona | 14.7¢ | $1.06 | $12.88 |
| South Carolina | 14.7¢ | $1.06 | $12.88 |
| Kansas | 14.6¢ | $1.05 | $12.79 |
| Georgia | 14.2¢ | $1.02 | $12.44 |
| Iowa | 14.1¢ | $1.02 | $12.35 |
| North Carolina | 13.9¢ | $1.00 | $12.18 |
| Missouri | 13.6¢ | $0.98 | $11.91 |
| Oregon | 13.4¢ | $0.96 | $11.74 |
| Tennessee | 13.3¢ | $0.96 | $11.65 |
| Kentucky | 13.2¢ | $0.95 | $11.56 |
| Mississippi | 13.1¢ | $0.94 | $11.48 |
| Oklahoma | 13.1¢ | $0.94 | $11.48 |
| South Dakota | 12.7¢ | $0.91 | $11.13 |
| Montana | 12.4¢ | $0.89 | $10.86 |
| Nebraska | 12.2¢ | $0.88 | $10.69 |
| Arkansas | 12.1¢ | $0.87 | $10.60 |
| Washington | 12.1¢ | $0.87 | $10.60 |
| Louisiana | 11.9¢ | $0.86 | $10.42 |
| Wyoming | 11.6¢ | $0.84 | $10.16 |
| North Dakota | 11.5¢ | $0.83 | $10.07 |
| Utah | 11.4¢ | $0.82 | $9.99 |
| Idaho | 11.3¢ | $0.81 | $9.90 |
Efficient vs. inefficient
A $37.94/year difference across the wattage range.
Swapping a high-draw model for an efficient one pays for itself. Here's what that looks like annually at typical usage.
Most efficient
15W
$0.45 per month
$5.42 per year
Typical
40W
$1.19 per month
$14.45 per year
High draw
120W
$3.56 per month
$43.36 per year
When it hits hardest
year-round peak
Steady use.
Ways to cut the cost
- 1
Enable auto-off feature if supported
Saves 15-30 kWh/year
- 2
Use smart plug to kill idle draw
Saves 10-25 kWh/year
- 3
Lower volume — amp watts scale with output level
Cuts active draw 30-50%
Real-world wattages
Pulled from actual spec sheets.
| Brand | Model | Watts |
|---|---|---|
| Audioengine | A2+ | 30W |
| Edifier | R1280T | 42W |
| KEF | LSX II | 100W |
Picks that actually move the needle
Three products worth comparing if you're thinking about upgrading or supplementing what you have.
Some links below are affiliate links. If you buy, we may earn a small commission — it never changes the price you pay, and we only recommend picks we would stand behind.
See also
Related appliances
Sources: www.energy.gov · www.energystar.gov
Last updated: 2026-04-13