During a power outage at my apartment this year, I watched movies on my MacBook Pro instead of on my television. While I had no complaints about the screen size, I did have an issue with how low the audio coming from my speakers was. External speakers would help, but I don’t want to buy them or lug them around every time I want to watch a movie.
I didn’t do anything about it at the time, but then I realized that I should be able to crank up the volume to any unsafe level I want. Turns out, there are a few different ways to boost a Mac’s volume level, some of which work system-wide, and others that are app-specific.
Option #1: System-Wide Volume Booster & Equalizer (Paid)
Boom 2 is an incredibly intuitive and beautifully designed volume booster and equalizer that works system-wide on Mac OS X, specifically for Yosemite. This means that music from iTunes and Spotify, videos from QuickTime, and movies streaming from Netflix and Hulu will now be louder. And the most surprising part is that even the quality of the audio increases.
The process to set it up is incredibly easy and actually pretty fun. When you open Boom, it does all the work for you, calibrating the best sound for your computer. A song will play in the background, showing you the differences in loudness and quality when the EQ is off and on. If you’re not satisfied with the end result, you can customize the equalizer, change the frequency controls, add effects, and more.
Boom 2 has a free 7-day trial, but costs $14.99 to purchase thereafter. If you’re running Mountain Lion or Mavericks, you can purchase the original Boom for $6.99 instead.
Option #2: System-Wide Volume Booster & Equalizer (Free)
If you don’t want to shell out any money, you can create your own system-wide equalizer for Mac OS X. For this, you’ll need to download the following two free programs.
Soundflower (download the latest version)
Apple’s AU Lab
Follow the instructions that both software programs provide, then reboot your computer. Now turn your volume all the way up and follow these steps to finish setting everything up:
Go to System Preferences -> Sound -> Output and select “Soundflower (2ch).”
Head over to Applications -> Utilities and open the AU Lab app. Select “Soundflower (2ch)” from the Audio Input Device settings and then click on “Create Document.”
1. Turn up both of the master volumes.
2. From the Effects tab, click on “AUGraphicEQ.”
3. Change the EQ from 31 bands to 10 bands (to make it easier).
5. When you’re satisfied with the sound (and how loud it is), save it from the tab that says Untitled.
6. Finally, open the AU Lab preferences, click on “Document,” check the box next to “Open a specific document,” and find the file you just saved. This will open your preferred EQ setup every time you open AU Labs.
7. speSince you need AU Labs open at all times for the EQ to take effect, right-click on the AU Lab icon, go to “Options” and select “Open at Login” so that it opens automatically every time you boot up.