The SP-BS21-LR is a two way, bass-reflex bookshelf speaker that is the brain-child of designer Andrew Jones who is Pioneer's Chief Speaker Engineer and the man responsible for their touted T.A.D. loudspeaker - clearly Jones knows a thing or two about loudspeaker design. The SP-BS21-LR come in a black ash finish and feature a curved cabinet design to minimize internal vibrations. A knuckle rap on the top of the cabinet reveals solid construction but nothing too inert either. So far, so good. The SP-BS21-LR measures in at seven inches wide by nearly 13 inches tall and eight inches deep. It weighs eight and a half pounds, which is light considering its size and build quality. The SP-BS21-LR possesses a four inch woofer mated to a one inch soft dome tweeter, giving it a reported frequency response of 65Hz to 20kHz meaning the SP-BS21-LR will require a subwoofer or two for true, full-range performance. Still its six Ohm load and 84dB sensitivity make it ideal for most modern AV receivers and/or integrated amps - such as the ones offered by Pioneer.
In terms of sound I must admit there's a lot to like here. I'm not going to shout from the mountain top that the SP-BS21-LR manages to somehow best speakers costing five times as much, however for its sub $100 asking price Pioneer has a lot to be proud of. While it would be easy for me to dismiss the SP-BS21-LR's bass performance as non-existent, what is present seems richer and deeper than what the spec sheet would have you believe. Still, you'll want to mate it to a subwoofer if you plan on any sort of spirited, full-range listening. There is a bit of bump in the lower midrange (no doubt one of the factors contributing to the illusion of more bass) that lends more presence and weight to vocals, be it male or female.
The SP-BS21-LR's high frequency performance is quite good, possessing a smooth, largely indifferent demeanor that has a bit of natural sparkle, which is surprising given the speaker's asking price. In terms of soundstage the SP-BS21-LR is, again, surprisingly able to create an intimate stage for the performances to exist within. Is it laser focused? No, but the definition it does have will have you scratching your head wondering how more expensive speakers manage to do worse. Dynamically, the SP-BS21-LR seems largely unflappable, able to produce copious amounts of volume without a great deal of strain, though at their limits things become a bit more two-dimensional. Clearly, there's a reason why Pioneer has chosen to package the SP-BS21-LR into a 5.1 home theater system in the SP-PK21BS that is available direct from Pioneer for $399. As good of a value as I believe the SP-BS21-LR's to be, I think a full 5.1 surround sound system comprised of four, SP-BS21-LRs, a matching center and subwoofer for less than $400 is even better.Read about the high points and low points of the SP-BS21-LR loudspeaker on Page 2.