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8 Inches 3-Way Bookshelf Speakers (Pair) - Black
In Stock This item should ship today (11/25/2015) if ordered within 3 hours 40 minutes

8 Inches 3-Way Bookshelf Speakers (Pair) - Black

Get some sweet sounds from these moderate sized bookshelf speakers from Monoprice!

These attractive speakers feature a single 8" polypropylene woofer, a 4" polypropylene mid-range driver, and a 1/2" dome tweeter on each unit. They have a sensitivity of 88 dB and can handle 120 watts of power, making them a perfect match for moderately powered amps.

The flat black wooden cabinet measures about 16 7/32" tall, 11 3/8" wide, and 9 3/8" deep. They can be mounted vertically or horizontally on a bookshelf or vertically on a wall, using the keyhole bracket on the back of the speaker enclosure. The spring-loaded speaker wire connectors can accept wires up to 16-guage thick.

Outstanding sound quality, an attractive finish, and solid performance make these the perfect stereo speakers or replacements for smaller satellites in a 5.1 channel home theater configuration. Combine two pairs of these with one (or two) of our 12" powered subwoofers and you will have a 5.1 sound system that will rival that of your local theater!


Support Files:

Frequency Response 50 Hz to 20 kHz
Power Capacity 120 watts
Impedance 8 ohms
Sensitivity 88 dB
Woofer 8" polypropylene
Mid-range 4" polypropylene
Tweeter 1/2" dome
Dimensions (HxWxD) 16 7/32" x 11 3/8" x 9 3/8" (including grill)
Weight 7.5 kg (16.5 lbs) each

Included in the Box:
  • 2x Speakers

43 Reviews

89.07% of the reviewers recommend this product


Part of my ultra-budget home theater speaker system

  • Bigstuff,
  •  Forked River, NJ 
  • 11/1/2015 7:46:00 PM

Pros: Price, 3-way, great sound

Cons: Could be too big for some! Would be great with 5-way posts for speaker wire connection. Shipping to NJ was a little expensive.

What a deal I got on these speakers! Perfect timing with a Monoprice sale and an additional percent off promotion. I got 1 pair of these 3-way 8251, 3 pair of the 8250, and the 8248 8" powered subwoofer. I have it all hooked up to an Onkyo HT-RC360 and added an Infinity BU1 sub for a full 7.2 setup. The 8251s are the front L/R, and the 8250s are the center, surround, and height speakers. I have about 60 hours of break-in on the 8250s and 30 hours on the 8251s and the sub. All of this was set up using the Audyssey room-correcting auto setup. All of this is in my small home office of about 11'x13'.

When I decided to set up my Onkyo receiver in my home office, I intended to just have a pair of speakers as left and right for a 2-channel stereo setup. The first speakers I looked at were Yamaha NS-6490 available for about $129 online. They are a large 3-way sealed speaker with an 8" woofer, 4" mid, and 7/8" tweeter. Sound familiar? After doing a lot of research and reading of reviews, I was drawn to the 8251s based on a review of the 8250s. The reviewer said he had these as front L/R and the 8250 as a center channel in a home theater setup. I was all set to get 4 pairs of the 8250s for a 7.2 setup, but with the reviews here and on Amazon being mostly positive, I decided to get the 8251 for the front L/R. No regrets! In my review of the 8250s, I said that I could barely tell a difference between the 8250 and my Wharfdale Diamond 7.2 speakers. I did the same side-by-side A/B comparison with the Wharfdales and these 8251s. The difference was immediately noticeable! I preferred the sound of the 3-way 8251 over the 2-way Wharfdales. No doubts. The 8251s are crisp, clear, and warm. They made the Wharfdales (which sound great) sound muffled and muddy in comparison. It was good advice from the other reviewer to use these as from L/R in a home theater set up. I'm a little surprised that the bass isn't more powerful with the 8" woofers. Maybe it's that they are sealed? Doesn't matter for me as I'm also using 2 subs. I have one of these on a 30" stool, and the other hung using the keyhole hanger and a 50-lb picture hook nailed into a stud. I wasn't confident with just that, so I screwed in a 2x4 that is a little wider than the speaker and the bottom of the speaker rests on this for more support. The sound with these and the 8250s is great in all decoder modes, DTS Master, Neo6, Dolby Digital, PLIIz, Audyssey DSX, 7-channel stereo, 2-channel stereo, 2-channel direct, and sounds great with music (pop, rock, hip-hop, jazz, classical) as well as TV & movies. The setup I have is probably overkill for this small room, but it sounds great. ...and these 8251s aren't even broken in yet. Probably another 20 hours or so to go.

I have to thank CNET for the good press they gave the Monoprice products, and thank Monoprice for putting out such great products at such amazing prices! I never imagined I could get so much for what I paid! All of it for the same price as one pair of the Yamahas! Customer service is great too!

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Not bad, but not good

  • Rex Barry,
  •  Palm Desert, CA 
  • 8/25/2015 7:36:22 PM

Pros: Appear to be well made for the price.

Cons: Though they would be "warmer" with more mid-range with the three-way design.

They ware a little too "tinny" for me. I'm looking for a full, warm mid-range I'm sending them back to try the premium 2-way. I am doing both with a sub-woofer looking for a balanced and big sound. I want to give the Monoprice offerings a chance. My fall back is the B & W bookshelf speakers at $$$$

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Great speakers

  • Anonymous,
  •  ,  
  • 6/26/2015 8:16:23 PM

Pros: Surprisingly high quality sound, very sturdy construction, attractive, unbeatable price, very speedy delivery.

Cons: Mid - range unresponsive.

I guess I shouldn't be so surprised at the quality of these speakers as so many others have written great reviews, and it cannot be said enough: these speakers are outstanding. Guaranteed that they will make you say "wow".
I placed my order on Thursday, was happy that I got free shipping, and was expecting them maybe Monday so I could have some fun setting them up on my day off. They arrived the day after I ordered them, along with other pieces of equipment I had ordered on Wednesday afternoon. (Wow, that is fast!)
So I have had these speakers for a total of 2.5 hours and love the sound they produce. Well... sort of. I seem to have been part of the unlucky few who have received a pair of speakers with no mid range response from the 4" speaker. I have even tried changing the speaker cable, changing audio settings on all equipment, and using a different source. Nothing.
Otherwise they are great. Subwoofer turned off, they still push out very impressive lows that would trick you into thinking the sub is on. I have watched a couple of films in 2.1 stereo, listened to music, and run it through a couple of frequency tests While they sound so very good, there is just that feeling of emptiness that I cannot get over when watching the films. Have the lows, have the highs, have nothing to balance it out.
I plan on getting more speakers to complete a new 5.1 set up since these do sound so nice, but would truly like to have everything working properly.

In all honesty, I may wish to replace these with smaller 2-ways up front and complete the surround set up as that would better accommodate my home theater set up. Hopefully Monoprice can help me out with an exchange, as they seem to have some high quality customer service.
All in all these speakers are amazing, especially for the price and speed of delivery. It's just unfortunate that it seems to be a roll of the dice as to whether or not all 3 speakers work.

by Monoprice Administrator

Thank you for your feedback and truly sorry to here about the issue you have encountered with the mid range on PID 8251. It appears that you have received a defective speaker unfortunately. We do offer a 30 day return policy as well as a one year warranty on this item. If you would like I can assist you in setting up an RMA for a replacement which will be of no additional cost to you. Please let me know if you would like to continue with a replacement and I can get that started for you right away.

Gisselle B.
Tech Support

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  • Anonymous,
  •  Humble, TX 
  • 6/15/2015 1:05:41 PM

Pros: GREAT!!

Cons: NONE.

I've heard many speakers..and these little guys are some of the best I've heard at any price. I own JBL, Klipsch, Polk, Definitive Technology (outdoor) and these compare favorably with all of them! Fine sound and a superb value. Thanks Monoprice!

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So close to great, but not quite.

  • Anonymous,
  •  Gresham, OR 
  • 3/11/2015 12:53:31 AM

Pros: Great 8inch driver.
Great Tweeter.
Great Price.
Good sound.
Decent Finish.
Solid look.

Cons: The 4 inch driver does not work on either speaker.

I bought these guys and then in the midst of life, took a while to take them out of the box and set up. Once I did I immediately noticed the mid driver wasn't working. It doesn't necessarily ruin the experience, but as an audio professional it is definitely noticeable to me. The speakers are for home use and I use them on a low setting for background ambiance and so, it's not a total deal breaker. BUT - I paid for a three way speaker and got a two way speaker. That isn't cool. I haven't taken them apart to try to discern if the driver is even wired in quite yet because I'm hoping MonoPrice pulls through on this. I've tried different music, I've tried a different receiver, I've even brought some diagnostic tools home from my shop such as a RTA mic on my fancy DB meter and officially determined that 0DB of noise is being put out of the drivers on BOTH the speakers.

by Monoprice Administrator

Thank you for your review and truly sorry to hear about the issues experienced with PID 8251. Unfortunately, it appears as though you may have received defective speakers. If you would like, I can help setup an RMA for a replacement. We offer a one year warranty for this product and obtaining a replacement would be of no additional cost. If you wanted to proceed with the RMA, please let me know and I can get that started right away. Apologies again for any inconvenience and hope this helps!

Gabby Villa
Tech Support Associate

by Anonymous
Gabby, I would really appreciate setting up an RMA. Please let me know how I can proceed.
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