PA speakers are broken up into two distinctive types: Powered and Unpowered. Powered speakers (also referred to as “active” speakers) have built-in amplifiers. Unpowered speakers, (Also known as “passive” speakers), do not contain amplifiers & it is necessary to connect them to an external amplifier. At musician’s friend we have a great selection of both types, from the top brands, including Mackie PA Speakers and Electro-Voice PA Speakers. There are many different options to choose from in addition to whether you want powered or unpowered. The Speakers come in different sizes – typically either from 8” to 15” – as well as different outputs. When thinking about how loud you want the speakers to be depends on how they are going to be used. 115-120 dB is enough for a solo acoustic set, 120dB+ is enough for vocals with a band and 125dB will usually be sufficient to enable a band to be audible. This is a rule of thumb however, so please take the time to think about how the speakers will be used. As with everything we sell, all our PA Speakers are supported by our price & satisfaction guarantees and free standard shipping now applies to all orders over $25, including many heavy items.