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Item#: 9SIA8792VY7451

Pioneer SP-BS21-LR Bookshelf Loudspeakers Pair

  • Superior Crossover Design for Full-Spectrum Clarity
  • Curved Cabinet Construction Designed to Reduce Vibration
  • 1" Soft Dome Tweeter for Crisp, Accurate High Frequencies

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Pioneer SP-BS21-LR Bookshelf Loudspeakers Pair


Created by world-renowned speaker engineer Andrew Jones, SP-BS21-LR bookshelf speakers offer high-performance and exceptional quality to deliver a stunning music and home theater experience.

When you're looking for bookshelf speakers, the desire is always the same: to find high-quality, great-sounding speakers that don't require a co-signer to buy. And it wouldn't hurt if they could look spectacular sitting on your shelf as well.

That's always been the challenge. Until now. Introducing the SP-BS21-LR Bookshelf Speakers from Pioneer.

70 Years of Audio Firsts

These speakers come with a remarkable pedigree of over 70 years of Pioneer audio heritage and industry firsts. Like every speaker we build, these are engineered to offer incredible design and amazing sound quality. But then that's exactly what you'd expect from speakers designed by internationally renowned speaker engineer Andrew Jones. As Pioneer's Chief Speaker Engineer, Andrew has designed some of the world's finest loudspeakers, some costing as much as $70,000. Now he has brought his high-end expertise and passion to the creation of this affordable bookshelf speaker. And while the price is considerably lower than some of his other efforts, the expectation and delivery of accurate sound reproduction is the same.

Thinking Out of the Box

Typically you'll find most bookshelf speakers not only come in a box, they are a box. And while that might be better for production costs, it isn't better for sound reproduction. The SP-BS21-LR speakers utilize a true curved cabinet design. So besides the aesthetics being considerably more pleasing, this stiffer design reduces standing sound waves inside the cabinet, resulting in high-performance and exceptional sound quality.

As you look at them, you'll also notice our unique speaker grills. They're beautiful and elegant in their own right, but not for their own sake. This visually pleasing design also has a specific function, which is doing a superior job of protecting the speaker drivers.

The Inside Story

The job of the cross-over in a speaker is to break the audio signal into low, high and sometimes mid-range frequencies. It's an important job, and it uses circuitry like inductors and capacitors to accomplish it. Much of the competition uses an extremely simple, low-cost cross-over made up of a single capacitor and inductor. The Pioneer SP-BS21-LR utilizes a sophisticated 6 component high-quality cross over. The reasoning is simple: we do it because it's one more way of insuring high-quality sound that makes its presence known.


  • › Oversized magnets for powerful bass
  • › Oversized magnets for powerful bass
  • › Curved cabinet construction designed to reduce vibration
  • › 1" soft dome tweeter for crisp, accurate high frequencies
  • › Designed for both 2-Channel Music and Home Theater applications


  • › Enclosure: Bass-reflex Bookshelf Type
  • › Configuration: 2-Way
  • › Frequency Range: 65Hz - 20kHz
  • › Nominal Impedance: 6 Ohms
  • › Sensitivity (2.83 V): 84dB
  • › Maximum Input Power: 80W
  • › Crossover Frequency: 2kHz
  • › Dimensions (W x H x D): 7-1/8 x 12-5/8 x 8-1/16"
  • › Weight (each): 8 lbs 6 oz
  • › Woofer: 4"
  • › Tweeter: 1"

Learn more about the Pioneer SP-BS21-LR

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the Pioneer SP-BS21-LR

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  • Joseph E.
  • 7/1/2015 2:24:04 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsSBP-BS21

Pros: Price, Sound

Cons: Can only play so loud. Sound slightly boxy. Limited bass

Other Thoughts: These speakers are aimed at the buyer who is interested in good sound. If you want something that doesn't advertise its presence (Bose cubes) these are not for you. Bookshelf speakers is what they are. They deserve to be mounted on stands well away from any wall. They sound very good, especially for the money. They're better than any other $49 a pair (what I paid) speaker that I've ever heard. They have a relatively smooth and extended frequency response without the exaggerated highs and boom filled bass of a lot of inexpensive speakers. The bass while relatively accurate doesn't go very deep (with a 4.5” woofer what else did you expect). However, when paired with a sub woofer they make a system that many would never feel the need to upgrade.

They do not work well in the near field. Any true bookshelf speaker will be extremely directional when used in the near field. The near field being less than 4 feet. So forget desktop placement and listening distance. They were designed to be stereo speakers not PC desktop speakers. For the best sound they should be placed on stands that get the tweeters to ear height when seated. They have no mounting brackets because they're rear ported. Remember, these are aimed at the audio/AV market not the Bose using HT bunch. They need some real power to come into their own. The 20WPC chip amps (Lepai 2020A for example) do not have enough “juice” to drive them properly. I have a Lepai 2020A so I know of what I speak.

The ones I own are on 28” high stands connected to a Yamaha receiver/8” subwoofer (not the Pioneer)/ Minimus 7's (rears), with no center channel, in my bedroom system. I'm quite happy with the sound I'm getting for music or movies.

My reference is my tube driven ESL system with SS driven dual TL sub woofers and ARC preamp.

1 out of 1 people found this review helpful. Did you? Yes No

  • David C.
  • 4/26/2015 7:01:24 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

5 out of 5 eggsAlmost Audiophile Quality

Pros: Low Cost for Great Sound

Speakers are very fine for quality, near audiophile music listening. Short on bass, excellent mid, decent high end.

Very open sound, with instruments and voice clear and true

Excellent in a living room situation, would rock as a 2.0 set up for a TV with a decent amp or running music in a bedroom with a small amp hooked up to your phone/ipod/tablet playing music.

Cons: Not great for nearfield situations. They need distance from a wall (all ported speakers are like that) and they need some decent seperation to truly enjoy the sound.

Other Thoughts: For the price, unbeatable.

2 out of 2 people found this review helpful. Did you? Yes No

  • Michael H.
  • 1/20/2015 7:27:11 PM
  • Tech Level: Average
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggs

Pros: They look nice.

Cons: I wish they had a place for mounting. I ended up having to screw into the cabinet, which I did not want to do.

Other Thoughts: I bought the floor and center speakers and I really like them. When I got these I was disappointed. These guys can't compete with the front 3 speakers. It made sound like most of the sound was coming from the front speakers. At best, these could be used as the 6th and 7th (side or top front) speakers. I ended up replacing these with the sp-bs41. I am considering getting two sp-c21 to use as rear or side channels and not use these at all.

1 out of 6 people found this review helpful. Did you? Yes No

  • Kevin T.
  • 12/8/2014 5:38:34 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month

5 out of 5 eggsIt really fills a room

Pros: Great bass resonance - This will fill a medium size living room. Though I would still recommend a subwoofer if your house members allow it.
Sound is rich and level most of the time. Miles better than my Insignia NS-SP213 bookshelfs.

Cons: The highs are a little toned down. Maybe a tad too much for my taste.
Bass can muddle up the experience sometimes but only in certain songs and movies.

Other Thoughts: A great buy for $60 for a pair. Some people complain about the design of the box since it narrows down in the back. But I was kind of glad for it because I was able to wedge them right next to my TV without getting stands.

2 out of 2 people found this review helpful. Did you? Yes No

  • Kris H.
  • 9/28/2014 7:22:35 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsA bit large for surround speakers

Pros: These speakers are a great buy to go along with the floor speaker set if you are looking for a full surround sound speaker set up.

Cons: These speakers are much larger than you might think. You don't really realize their size just by looking at the dimensions on paper. They are well above average size for a bookshelf/surround speaker.

Other Thoughts: Overall, these speakers were a great buy to go along with the purchase of the floor speakers. The most important thing to keep in mind (in my opinion) when purchasing these speakers is to make sure you can accommodate their size. they weigh about 7-8 lbs each so mounting them to a standard surround speaker stand won't be an option.

3 out of 3 people found this review helpful. Did you? Yes No

  • Marc S.
  • 8/1/2014 11:58:19 AM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsdetailed and transparent as nearfield monitors

Pros: great value
just about all of the sonic accuracy you need
not fatiguing

Cons: their size and shape make them a bit cumbersome to integrate into an audio/recording station
highest highs and lowest lows are rolled-off
fairly directional which might make a difference for basic home stereo use.

Other Thoughts: paired with a quality (but not necessarily high powered) amp, I'm finding these pretty optimal as monitors for mixing and sound design. Again, some roll-off, so you need to double-check with headphones now and then, but let's face it, any powered monitor setup under $300 and anywhere near this size is going to strain for those frequencies if they even try.

2 out of 2 people found this review helpful. Did you? Yes No

  • maricela f.
  • 7/26/2014 10:55:49 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsWONDERFUL SPEAKERS!



0 out of 2 people found this review helpful. Did you? Yes No

  • Doug P.
  • 6/15/2014 10:50:38 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAt this price...Go!

Pros: Yes I have these! The negative reviewer missed many points in speaker design. #1- the plasti-shell mounting is for fast and accurate assembly, using the lowest cost driver frame, It is not correct to upsize a driver when vented. What you do is RIGHT-SIZE it to the correct volume. and here, as in the crossover, we see a designed, not thrown together unit. Cheap speaker? Yes! I found the harmonic distortion high in the bass driver, below 200Hz. It is also true that you DO NOT hear this unless you aspire to organ concertos! Tweeter is fine & is time-aligned!

Cons: Vinyl. You can peel it off & do elegant veneer. Just do paper-backed veneer

Other Thoughts: A serious quality spkr. at this size costs 10 times as much! For just one!

2 out of 2 people found this review helpful. Did you? Yes No

  • Evan J.
  • 3/24/2014 10:48:43 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGood Pair of Speakers

Pros: Great, Clear sound. Easy set up. Banana plug compatible. Look great.

Cons: None so far.

Did you find this review helpful? Yes No

  • Brett C.
  • 2/21/2014 5:45:58 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggs

Pros: I got these speakers to replace one of my surrounds that busted during a move for my 5.1 setup. They are a subtle yet noticeable upgrade to the ones I got years ago packaged with a receiver.

Cons: No mounting points to hold them to a wall, but they are bookshelf speakers so that's a little expected. Can't really fault the good people at pioneer for that.

Other Thoughts: Make sure you have a good place to put them if you get these. I typically mount my speakers a little above ear level but with no mounting points and my landlord not letting me put nails in the wall I have to sit these on the floor until I move.

2 out of 2 people found this review helpful. Did you? Yes No

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Item#: 9SIA8792VY7451
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