Rockville RPG15BT 15" 1000W Powered DJ PA Speaker with Bluetooth, USB, SD Card, EQ & Remote - Perfect for DJ Gigs, Live Performances & Outdoor Events

My interest in this item was for it to serve as a primarily for-voice loudspeaker for Karaoke purposes. I had read in an article somewhere that using regular music speakers for karaoke sessions (especially enthusiastic ones) would not only compromise the voice reproduction but also the music reproduction. The article claimed that music speakers were not designed to faithfully reproduce voice input. Additionally, it mentioned that the for-music speakers could suffer some damage when used for voice inputs which were meant to be reproduced by for-voice loudspeakers. Whether true or not, I was not willing to risk the hardware health of my for-music speakers - Bose 901 Series V speakers - which at this time is quickly approaching its 30th anniversary.My intention was to channel voice inputs solely through the Rockville RPG15BT speaker while channeling the karaoke/minus-one/accompaniment background music through the Bose 901s (driven by a Carver M400t). The karaoke minus-one/accompanying music would also be inputted into the Rockville speakers. The music source is from a laptop PC through its headphone output port and, through a splitter, the audio content is distributed (1) to the amp driving the Bose 901s and (2) to the RCA input ports on the Rockville RPG15BT.After some configuration/re-configuration, I was able to accomplish this. As originally expected, the Rockville was unable to reproduce the music component of the audio as well as the Bose 901s. But the Rockville speaker was able to reproduce the voice input/component of the karaoke performance in a way the Bose 901s did not. And it was LOUD. Am still playing with the equalization settings for the Rockville speaker so it's possible that there will be some incremental improvement in the fidelity of music reproduction though I can't see how it can approach the fidelity of the Bose 901s to any appreciable extent.So I now presumably have the best of both worlds for my karaoke set-up; i.e. the musical fidelity with the Bose 901s for the background/accompaniment music and the loud and robust sound of voice inputs on the Rockville speakers performing together.Eventually, I hope to integrate my Behringer Xenyx 1202FX audio mixer into my karaoke setup so I can incorporate more sound effects and accommodate as many as 6 microphones into the karaoke setup. Not sure if anyone's noticed but once karaoke singers get wound-up, they are no longer given to either giving up their microphones or stop singing.On the performance of the Rockville speaker itself, as far as I can see and have experienced, it performs pretty much in the manner described in the item description. USB connection works okay playing mp3 files using either a flash drive or a portable hard disk. Haven't tried the Bluetooth or SD components.My greatest apprehension (fortunately unfounded) was to receive an item that wouldn't work initially. But as most electronic equipment go, once it performs continuously without problems during the entire "burn-in" period, it should work well for the next several years.BTW, being the miserly penny-pincher that I am, I placed my order of this item with Audiosavings (listed as "Other Sellers") as their item price was $10 lower with no other additional charges (price offered was net).I notice that the equipment emits a noticeable "hum" while idling. Not sure if this is typical of this genre of audio equipment. Once the music and the voice inputs get going though, the "hum" is no longer noticeable or in any case drowned out by the audio being played/sung.Will try to post updates to this review if I encounter any significant experience with the Rockville RPG15BT that other prospective buyers may find useful.