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Crutchfield

Definitive Technology BP-8040ST

Bipolar floor-standing speaker with built-in powered subwoofer

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  • Definitive Technology BP-8040ST

    Front

  • Definitive Technology BP-8040ST

    Back

  • Definitive Technology BP-8040ST

    Back connection panel

  • Definitive Technology BP-8040ST

    Cutaway view

  • Definitive Technology BP-8040ST

    Transparent view

 

Our take on the Definitive Technology BP-8040ST

by Kristen Schaub
Definitive Technology

Floor-standing speakers — still standing tall

Sure, floor-standing tower speakers buck the industry trend toward smaller, visually inconspicuous speakers, but they're hard to beat if great sound is your primary goal. Tower speakers produce powerful sound with excellent bass, making them a great choice for serious music lovers and for folks who want high-impact home theater.

Big sound from a slim powered tower

Tired of sub-par speakers that just fire sound at you, rather than all around you? Then check out Definitive's high-performance BP-8040ST Bipolar SuperTower™. It uses a unique driver design with both front- and rear-firing speaker arrays to surround you with rich, lifelike sound. This tower also adds a built-in powered subwoofer to the bottom of the cabinet for intense bass. Even in large rooms, every listener will experience a huge, three-dimensional soundstage with both music and movies. Plus, this speaker has attractive high-gloss black top and bottom caps with a cloth grille-wrapped enclosure for a sleek look.


Bipolar speaker technology immerses you in detailed sound

sound waves

Front and rear speaker arrays work together to create enveloping sound.

Here's how it works: direct sound from the front midrange drivers and tweeter arrives at your ears first, to provide clear, focused imaging. That's followed by sound from the rear mid and tweeter, which is slightly delayed, to enhance spaciousness. The combination creates a lush, seamless soundstage that's more like the way we hear sounds in real life. And thanks to Definitive's Balanced Double Surround System (BDSS) drivers, your music and surround effects will sound incredibly clear, allowing you to pinpoint the soloist in a band or the direction of a jaguar's call in the jungle.

Cutaway view

Cutaway view of the BP-8040ST's drivers

Powerful bass built right into the cabinet

At the base of the speaker is an 8" side-firing subwoofer coupled to two bass radiators. This trio creates a total surface area that nearly matches that of a traditional 15" woofer, but has better bass control, speed, and detail than a single huge woofer could achieve. A built-in 300-watt amplifier powers the subwoofer, delivering hard-hitting bass that eliminates the need for an external sub. And because a subwoofer is built into the cabinet, bass output is already perfectly blended with the mids and the highs. All you have to do is set the bass volume to match your room and taste, then sit back and enjoy your music and movie soundtracks.

Build a complete Definitive Bipolar home theater system using perfectly matched centers (see the CS-8040HD, CS-8060HD, and CS-8080HD) and bipolar surrounds (see the SR-8040BP and SR-8080BP).

Got wire?

Most speakers don't include any. Learn about choosing and installing speaker wire at the Crutchfield Learning Center.
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Did you know?
Your new speakers will probably sound better after several weeks of use than they do right out of the box. That's because the material surrounding the woofers will loosen up, allowing the drivers to move more fully. Definitive Technology estimates a break-in period of 24 to 48 hours of playback before the speakers will deliver optimum sound quality. For more information and helpful tips, check out this article from Definitive's website about conditioning your speakers.


See more info on this item

Highlights:

  • Forward Focused Bipolar Array™ technology for lifelike imaging and pinpoint localization
  • Balanced Dual Surround System (BDSS) driver technology places rubber surrounds on both the outer and inner edges of each speaker cone for improved clarity
  • frequency response 25-30,000 Hz (±3 dB)
  • sensitivity 92 dB
  • 8-ohm impedance
  • handles up to 300 watts
  • front array: dual 3-1/2" mids and 1" pure aluminum dome tweeter
  • rear array: 3-1/2" mid and 1" pure aluminum dome tweeter
  • 8" woofer with dual 8" passive radiators
  • built-in 300-watt subwoofer amp
  • one set of 5-way binding posts
  • high-gloss black finish on top and bottom caps with cloth grille-wrapped enclosure
  • 10-9/16"W x 39-1/16"H x 12-1/4"D (with included stabilizer feet)
  • warranty: 5 years woofers, 3 years subwoofer amp
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Enclosure
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Passive Radiator
Finish
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Cloth-covered MDF
Color
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Black
Tweeter
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Dome
Tweeter Size (inches)
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1
Midrange Size (inches)
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3.5
Woofer Size (inches)
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8
Woofer Composition
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Polymer composite
Woofer Surround
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Rubber
Built-in Powered Sub
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Yes
Video-Shielded
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Yes
Connector Type
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5-way post
Bi-amp Inputs
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No
Parts Warranty
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5 Years
Labor Warranty
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5 Years
Specifications
Power Range
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20-300
Frequency Response
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25-30k Hz
Sensitivity
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92 dB
Impedance (Ohms)
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8
Amplifier Power
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300
Height (inches)
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39-1/16
Width (inches)
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10-9/16
Depth (inches)
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12-1/4
Weight
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40 lbs
Product Research
What's in the box?

Download owner's manual

  • One tower loudspeaker (with black cloth covering and glossy black top cap installed)
  • 7' AC power cord (IEC 2-prong type)
  • 4 Black stabilizer feet
  • 8 Self-tapping screws (length=1.375")
  • 8 Threaded carpet spikes
  • 8 Threaded rubber floor glides
  • Owner's Manual
  • Feature booklet
  • Registration card

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Speaker Features
Connections
Dimensions

Speaker Features

Bipolar Design: The Definitive Technology BP-8040ST is a 3rd generation "SuperTower." This bipolar speaker contains drivers on the front and rear of the cabinet. The BP-8040ST uses a new patent-pending design called Forward Focused Bipolar Array. By radiating sound both forward and rearward, the speaker produces sound as it is in real life, with improved pinpoint localization of soloists, greater placement flexibility, and superior intelligibility.

Non-Resonant Tapered Cabinet: The BP-8040ST features a highly-engineered inert and resonance-free heavy MDF (medium-density fiberboard) cabinet to prevent coloring the sound. The front of the enclosure is tapered to make it appear slimmer. Wherever a driver is attached to the cabinet, a second layer of MDF is attached to prevent the drivers from causing vibration to the rest of the enclosure. The sealed midrange enclosures serve as braces for the side walls, while MDF cross braces near the woofer further stiffen the cabinet. The entire enclosure is wrapped in a cloth "grille sock", while the high-gloss polymer composite end-cap and bottom panel add a touch of elegance.

High-Definition Drivers: The BP-8040ST utilizes two cast-basket 3-1/2" high-definition polymer composite midrange drivers surrounding a 1" annealed Pure Aluminum dome tweeter in a D'Appolito front array. On the rear, there is a single identical 3-1/2" driver and the same 1" aluminum dome tweeter as used in the front array. The front and rear arrays are housed in separately sealed MDF enclosures to isolate the midranges from the influence of the subwoofer. The drivers feature Definitive Technology's patented 2nd-generation Balanced Double Surround System (BDSS) that supports the speaker cone at both the inner and outer edges, allowing longer, more linear excursion over a wider area. A new patent-pending Linear Response Waveguide smoothes off-axis frequency response and disperses sound over a wider area.

Built-in Powered Subwoofer: The BP-8040ST is equipped with a long-excursion, side-firing 8" subwoofer, driven by a 300-watt Class D amplifier with an integrated Digital Signal Processor. The subwoofer is pressure-coupled with two 8" Low Bass Radiators. The combination of the active subwoofer and two bass radiators gives you 30% more surface area than a single 12" woofer, but with better control, speed, and detail. The benefits of a built-in subwoofer include:

  • Eliminates the need for a separate subwoofer that takes up additional floor space.
  • More bass output from two subwoofers, compared to one.
  • Two subwoofers reduce standing wave room resonances and dead zones for more evenly distributed bass.
  • The subwoofers are perfectly integrated and blended with the mids and highs, eliminating the crossover and phase controls of a separate subwoofer.

Subwoofer Volume: The level of the subwoofer (relative to the other drivers) can be adjusted using the rotary dial on the back panel of the speaker. Once the bass level is set, the overall volume of the speaker system can be controlled by the receiver/amplifier.

Auto Power: The BP-8040ST has a special circuit that automatically turns on the amplifier when a signal is fed to the speaker. The LED on the back panel will glow when a signal is sensed and the amplifier turns on. After the signal ceases, it may take up to an hour for the amplifier to turn off. When first powering up after being unplugged, the LED will flash for about 30 seconds while the firmware is loading.

Stabilizer Feet: The speaker comes with four stabilizer feet which attach to the bottom of the cabinet, two per side, with the supplied self-tapping screws. Each foot has a threaded insert to allow you to screw in the supplied carpet spikes or smooth floor glides, depending upon the type of floor they're being placed upon. Four additional threaded inserts are provided on the bottom panel (along with 4 additional carpet spikes and floor glides) in case you decide not to use the stabilizer feet. The spikes and glides add approximately 1" to the overall height of the speaker.

Placement: The BP-8040ST Bipolar speakers have a lot of flexibility when it comes to placement and positioning. It is recommended that the speakers be placed at least 4" from a back wall, and at least 6" from a side wall. When used as left and right main speakers, you should set up the speakers and the listening position in an equilateral triangle, with the speaker cabinets turned slightly inward.

Connections

Binding Posts: The BP-8040ST is equipped with a pair of gold-plated, 5-way binding posts on the back of the cabinet to attach your receiver's speaker wire. The terminals will accept bare wire, pin connectors, spade lugs, single and dual banana plugs. Recommended amplifier power: 20 to 300 watts RMS.

LFE Input: For the powered subwoofer, the BP-8040ST has a single RCA LFE (low-frequency effects) input. Since you'll be using two speakers, you will need a Y-adapter to split the LFE output from your receiver to each subwoofer.

Wiring Options/Speaker Setup: You can connect the BP-8040ST in one of two ways, with or without the LFE connection. If you use only speaker wire, you should set the speaker setup on the receiver to "Large" and Sub to "No." If you connect the speaker with speaker wire and the LFE, the speaker setup should be "Large" and "Yes."

Note: It is recommended that you do not use the receiver's auto setup function, as it is often ineffective in setting up and adjusting speakers with built-in subwoofers.

AC Power: The speaker has an AC power input (IEC 2-prong type) on the back panel for plugging in the powered subwoofer. A 7' AC power cord is included.

Dimensions

  • Width:
    • 5.6" enclosure only
    • 10.5625" with stabilizer feet
  • Height:
    • 39.0625" enclosure only
    • 40.0625" with carpet spikes or floor glides
  • Depth: 12.25" including binding posts
  • Weight: 40 pounds
 

Product reviews from the Crutchfield Labs (what are the Labs?)

Video: Definitive Technology Bipolar Speakers Demo

Video: Definitive Technology Bipolar Speakers Demo

by Julie Govan
9/29/2010
 
Video: Definitive Technology Bipolar Speakers Demo

Mike Lang, a trainer from Definitive Technology, visited Crutchfield to show off their new bipolar floor-standing and center channel speakers.

 
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Definitive Technology BP-8040ST Reviews

Average Customer Review:

11 people say:

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Filter by rating:
5 out of 5

Fabulous Sound

Written By UncleBobby, The Woodlands TX on Monday, June 30, 2014
Crutchfield Customer Review (What's this?)
 
These speakers really blow my mind! Hooked up to a Marantz SR5008. A long time ago I had a pair of speakers with a 10" woofer and a 10" passive radiator. Loved them for the warmth they gave the bass. These are by far superior sounding speakers! Clarity, richness! The sound comes from everywhere. Incredible for movies! sounds like you are in the theatre. Couldn't be happier!
Pros:
Great sound!!!!
Cons:
none
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5 out of 5

Lovin it

Written By Gary, North Carolina on Friday, January 24, 2014
Crutchfield Customer Review (What's this?)
 
Love the sound, the look and the quality.
Pros:
Sound quality and size.
Cons:
None
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5 out of 5

Impressive

Written By DE3, Silver Spring MD on Sunday, October 27, 2013
Crutchfield Customer Review (What's this?)
 
Lock in on the Def-Tech's in general after six months of listening and researching speakers. I have a very open basement with sitting areas in front and behind the primary (standard 5.1, less separate sub) placement of these speakers (all 8040 series) Read quite a few comments regarding the placements of these speakers as it relates to getting the best sound. This was not an issue at all for me. Unpacked speakers placed towers slightly angled in to main sitting area, allowed them to play at moderate level for approx. 30hrs, cranked them up and now experiencing what I consider to be some of the most incredible sounding for speakers in this price range and 50% higher. Of course as with any sound system there is a sweet spot for listening. However, the performance of these speakers is great from any location my large and open basement. If you go with 8040 towers I strongly suggest matching with 8040 center and rears. Sweet! (Use Profile: Movies with sound slightly turned up but not trying to move and earth. Also tons of Jazz often played at level so I can hear as I move around the house.)
Pros:
Easy set-up and Great sounds played soft of turned up
Cons:
None so far but make sure you use the speakers legs to prevent tip overs.
1 out of 1 people found this helpful
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5 out of 5

Best Speakers Ever.

Written By john, Dallas, TX on Monday, June 24, 2013
Crutchfield Customer Review (What's this?)
 
Unbelievable sound. Use them in a 12 x 15 gameroom with no surround or center channel. The sound is perfect. Highs are clear, mids are defined, and bass rocks. Zero distortion or issues. Crystal clear. Everyone who has heard them thinks I have more speakers hidden in the room. Well worth the money. Can not go wrong. Crutchfield and UPS were outstanding on service and delivery.
Pros:
Best speaker ever heard.
Cons:
None.
1 out of 1 people found this helpful
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5 out of 5

Great sound

Written By Jimmy, Lafayette, LA. on Wednesday, March 20, 2013
Crutchfield Customer Review (What's this?)
 
Excellent speakers for the price. I have a small media room and these speakers sound great for listening to movies or music. Glad I went with these over the 8020 model. No regrets, I would recommend these if you have a smaller space.
Pros:
Great sound, easy to set up.
Cons:
None
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5 out of 5

BP8040ST's Great sound

Written By RD, Strafford, NH on Wednesday, March 20, 2013
Crutchfield Customer Review (What's this?)
 
Excellent sound, especially for movie/surround. Don't get me wrong, these are great for audio only too, but the surround is awesome (I have them couped with 8040 center and 8040 surround speakers). Built in subs in each tower conserve floor space too. Replaced an old Cambridge Soundworks system, and there is no comparison to how good these are. Crutcfiled advisors, sales and technical folks are terrific.
Pros:
Excellent Sound, subs are spot on and can be adjusted to your desired level.
Cons:
A bit pricey, but more than worth the extra $ in quality and performance.
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4 out of 5

Impressed

Written By Kevin, San Antonio, TX on Sunday, March 10, 2013
Crutchfield Customer Review (What's this?)
 
These replaced a 10 year old pair of Klipsch towers. Moving the sub into my sons room makes for a better presentation in the living room. Using the Audessy mike left me with only adjusting the level of sub enhancement. I knew that the Klipsch horns were more efficient but the horns have a better detail on the highs. These speakers are very smooth otherwise and my son was surprised at the authority they possessed while watching Red Tails. He commented that a speaker this slim didn't impress him until he heard the rumble and dialogue reproduced in a very clear manner. I listened to them at an AV store and want as impressed as I was with them at home. Great buy and value.
Pros:
No external sub needed, balanced sound from a very slim speaker, strong dialogue performance, dual subs may disturb neighbors if in apartment.
Cons:
High end could possess a slightly more detailed sound.
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5 out of 5

Amazing sound

Written By Stephen, Raleigh, NC on Wednesday, June 13, 2012
Crutchfield Customer Review (What's this?)
 
The sound is amazing clear, Definitive Technology speakers are my favorate now. Also, Crutchfield is the best online shopping site for electronics, the service is awesome. It makes me won't go to Best Buy anymore.
2 out of 2 people found this helpful
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5 out of 5

Best Sound

Written By Joe, Lansdowne, VA on Thursday, March 08, 2012
Crutchfield Customer Review (What's this?)
 
Great speakers. The sound coming out these speakers, and without a separate subwoofer is something you will need to experience yourself. I can write a book trying to convince you, but reality is...you need to have a PAIR to believe.
Pros:
Excellent sound
Cons:
Price...but is worth it.
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5 out of 5

Very satisfied

Written By Jeff B, Cincinnati, OH on Friday, February 17, 2012
Crutchfield Customer Review (What's this?)
 
I was able to get permission from my wife for the speaker upgrade and couldn't be happier. The BP8040ST were a nice size choice and work in my smaller room. I previously listened to the BP8060's, but decided they were too much for my 11x15 room. At loud volumes, they can approach the feeling and sound of a live concert. Wife was impressed. Having powered subwoofer in each speaker seems to make the sound more realistic and less boomy than the subwoofer I replaced. Music you know sounds different, usually better, but I have noticed a few recordings that I have are not that great and you can tell.
Pros:
Realistic sound. Dual bass is cleaner.
Cons:
Expensive for me, but expect this to be a 10 year speaker.
1 out of 1 people found this helpful
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5 out of 5

WOW

Written By Joe, Mason City, Ia on Tuesday, February 14, 2012
Crutchfield Customer Review (What's this?)
 
Bought these to replace infinity primus 5.1 i can not be more pleased. there very clean and the detail is just awesome. the sub is more then enough. im going though all the music and rediscovering it. just love them well worth every penny. better then anything i have ever heard. even bose
Pros:
clean detailed sound with brillant imaging.
Cons:
nothing. these speakers rock.
Was this review helpful?    Yes | No
 

1 question already asked

Best receiver in the $800.00 range to drive my 8040 5.1 set-up. I have a Pioneer VSX1020 currently in use but feel the sound this produces is sub par especially on the high end. Suggestions please? [ thomas  Nov 27, 2013 ]
1 answer
  • Thanks for question Thomas. For product recommendation please reach out to an Advisor by phone or chat. They'll be able to look at current inventory and deals, and help find a receiver that will work great in your system. [ Jeff Staff  Nov 29, 2013 ]

Add accessories for the Definitive Technology BP-8040ST

You'll need speaker wire to connect your speakers to your amp or receiver. No wire is included with this speaker. See all categories & accessories

Original Monster Cable With gold pin connectors (15-foot pair)
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AudioQuest X2 Speaker Cable 14-gauge cable, connectors optional (30 feet, Gray)
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AudioQuest G2 Speaker Cable 16-gauge cable, connectors optional (30 feet, Gray)
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Monster Cable® 600sw Subwoofer cable (4 meters/13.2 feet)
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Monster Cable® 400sw Subwoofer cable (4 meters/13.2 feet)
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AudioQuest Black Lab Subwoofer cable (16 meters/52.5 feet)
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CableTruth 303S Subwoofer cable (9 ft.)
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AudioQuest Irish Red Subwoofer cable (12 meters/39.4 feet)
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AudioQuest Boxer Subwoofer cable (2 meters/6.6 feet)
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Monster Cable Y-adapter 1 male to 2 female
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AudioQuest FLX-X RCA Y-Adapter 1-male-to-2-female audio Y-adapter
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Panamax MD2 Space-saving surge protector with two outlets
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Definitive Technology CS-8040HD Center channel speaker with passive bass radiator
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Definitive Technology SR-8040BP Bipolar surround speaker
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For a more in-depth review and enhanced detailed information on the Definitive Technology BP-8040ST, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_735BP8040/Definitive-Technology-BP-8040ST.html ).

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