Actually, If you use DPS, you really don’t need Boom. If I understand Boom correctly, it simply boosts the volume louder than what the normal volume control allows. This is because the CoreAudio engine for OSX is floating point and has LOTS of headroom for you to make stuff loud. That is why we have a Volume Boost in our Preferences page. Depending on the profile and this Volume Boost feature, you can probably get louder than Boom.
However, be careful with this on USB sound card and Bluetooth. They may be using PCM audio and the Volume Boost may cause distortion.