Skip Navigation

Definitive Technology CS-9040

Center channel speaker

13 Reviews

Watch a first-look video

Item # 735CS9040

In Stock

Add to Cart

Ask an expert

Our VA-based experts can help.


Chat Email


Our take on the Definitive Technology CS-9040

Have you ever struggled to hear the dialogue on your favorite TV shows and movie soundtracks? With a high-performance center channel speaker like Definitive Technology's CS-9040, that won't be a problem. This powerful speaker uses advanced driver design and solid build quality to reproduce movie dialogue and on-screen action with exceptional detail and presence. Add it to a pair of Definitive's Bipolar Series home theater speakers to enjoy a huge, three-dimensional soundstage with both music and movies.

Hear what you've been missing

Have you ever struggled to hear the dialogue on your favorite TV shows and movie soundtracks? With a high-performance center channel speaker like Definitive Technology's CS-9040, that won't be a problem. This powerful speaker uses advanced driver design and solid build quality to reproduce movie dialogue and on-screen action with exceptional detail and presence. Add it to a pair of Definitive's Bipolar Series home theater speakers to enjoy a huge, three-dimensional soundstage with both music and movies.

High-tech drivers for exceptionally detailed sound

The CS-9040 has two 4-1/2" midranges flanking a 1" dome tweeter, for perfectly blended highs and mids. The aluminum dome tweeter is heat-treated to relax the crystal structure of the metal, then attached to a silk surround to help produce crisp, sparkling highs without a trace of harshness. And thanks to Definitive's Balanced Double Surround System (BDSS) driver design, which places a surround on both the outer and inner edge of the speaker cone to help it remain more stable as it moves, movie dialogue and special effects will sound clear, never muddy. There's also an upward-firing bass radiator in the top of the cabinet, so you'll hear just a little more boom in TV explosions and depth in bombastic movie scores.

Build a complete Definitive home theater system using perfectly matched bipole towers (see the BP-9020, BP-9040, BP-9060, and BP-9080X) and surrounds (see the SR-9040 and SR-9080).

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.

Product Highlights:

  • Balanced Dual Surround System (BDSS) driver technology places rubber surrounds on both the outer and inner edges of each speaker cone for improved control and clarity
  • dual 4-1/2" BDSS midranges for clear, accurate dialogue
  • one 1" annealed aluminum dome tweeter with silk surround for smooth, extended highs
  • upward-firing 8" passive radiator for enhanced bass output
  • frequency response 50-40,000 Hz
  • sensitivity 89 dB
  • impedance: compatible with 8-ohm outputs
  • recommended amplifier power: 50-200 watts
  • one set of 5-way binding posts
  • cloth grille-wrapped enclosure with aluminum trim rings
  • 20-3/4"W x 6"H x 12"D
  • warranty: 5 years
  • Our 60-day money-back guarantee

What's in the Box:

  • Center-channel loudspeaker
  • Owner's Manual
  • "What Obsession Sounds Like" card

Featured Video:


Definitive Technology CS-9040 Reviews

Average Customer Review(s):

(13 Reviews)

Definitive Technology CS-9040

Anonymous from Pinole, CA on 7/8/2018

Crutchfield Customer Review (What's this?)

Sounds great.




Jim from Independence, OH on 6/12/2018

Crutchfield Customer Review (What's this?)

Even though I got this speaker on sale, it was still expensive. It improved my ability to understand dialogue of TV drama programs by about 50% - but - no cigar. I purchased this speaker specifically to improve my ability to understand TV drama program dialogue. Turning up the volume does not work since it becomes too loud for others watching TV eve though they also cannot always understand the dialogue. I know it is not the receiver since it is also new and is at 130 watts and I have tried every Movie/TV audio setting on the receiver. Not sure if I am going to return the speaker or keep it. I rated this speaker 4 stars because of all the other reviews and I am probably an exception because I wear hearing aids.

Pros: Impovement over Def Tech 1000 center speaker.

Cons: Did not completely resolve my issue of not being able to understand dialogue of TV drama shows, ie. NCIS, Bull, Elementary, etc. - especially dialogue from females.

Definitive Technology CS-9040

Charles from GA on 4/12/2018

Crutchfield Customer Review (What's this?)

This center speaker smell like electrical burn coming from it. Defective Will be sending it back.

Pros: Sounds good

Cons: Electrical smell.

Definitive Technology CS-9040

Anonymous from Miami, FL on 3/21/2018

Crutchfield Customer Review (What's this?)

sounds great. good voice separation from L/R speakers.



Finally a Center Channel that fills the middle!

Eric from San Diego, CA on 1/22/2018

Crutchfield Customer Review (What's this?)

Fills in Center channel that Ihad been missing with my DT Mythos center. Big upgrade and love it. Crutchfield is the best.

Pros: The 9040 finally fills in my center audio field wit rich full sound and I can actually hear the dialogue.

Cons: Expensive if paying full price and non-powered sub.

Definitive Technology CS-9040

Anonymous from Belleville, IL on 12/16/2017

Crutchfield Customer Review (What's this?)

Excellent sound for both music and home theater use. Definitely recommend. Crutchfield customer service is top notch!



Definitive Technology CS-9040

Edward from Cary, NC on 12/10/2017

Crutchfield Customer Review (What's this?)

Really nice center speaker Voices fill the room No distortion

Pros: Free with purchase of front Speakers

Cons: None

Definitive Technology CS-9040

Hassan from Riverview, FL on 12/7/2017

Crutchfield Customer Review (What's this?)

Definitive Technology is the brand to go with, this center channel offers exactly what I was looking for, clarity of the speech.



Great deal and sound!!

David from Akron, OH on 11/3/2017

Crutchfield Customer Review (What's this?)

Ordered open box unit for a great deal. Looked great and works flawlessly!!! Sounds great with my system!! Love the new center speaker!!!



Good overall sound

Carlos from Jupiter florida on 8/13/2017

Crutchfield Customer Review (What's this?)

Great center speaker for the money. Replaced procenter 2000

Pros: Good sound especially mid range

Cons: Quite large.

Definitive Technology CS-9040

Anonymous from Oak Lawn, IL on 1/28/2017

Crutchfield Customer Review (What's this?)

Purchased this center channel to go with my definitive technology 9040 tower speakers. After I connected everything I realized I was missing so much dialogue with my old system. The passive woofer adds just enough low end to the center channel.

Pros: Looks good and sounds great.

Cons: None

Definitive Technology CS-9040

Dan from Minneapolis, MN on 1/3/2017

Crutchfield Customer Review (What's this?)

Purchased CS9040 to accompany my BP9020's. Replaced older Bose surround system. Naturalness and clarity of sound is exceptional. Matches up well with the floorstanding speakers. When Def. Tech. says their center is "full range", they're not exaggerating.

Pros: Superb clarity with sound and dialogue. Well constructed.

Cons: None

CS-9040 center speaker

RINO from San Marcos, CA on 7/26/2016

Crutchfield Customer Review (What's this?)

before purchase of the CS-9040 we had difficulty following the dialog of both streaming and DVD movies. Now that has all changed and we can concentrate on the movie and soundtracks.




Hands-on research

Features and Specs

Enclosure Passive Radiator
Tweeter Dome
Midrange size (inches) N/A
Woofer size (inches) 4-1/2
Connector Type 5-way post
Power Range 50-200
Sensitivity 89 dB
Impedance (Ohms) 8
Frequency Response 50-40k Hz
Height (inches) 6
Width (inches) 20-13/16
Depth (inches) 12
Weight 20 lbs
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research


Center-Channel Loudspeaker: The Definitive Technology CS9040 center-channel loudspeaker delivers immense clarity and focus to the vocal range, accurately reproducing even the most demanding audio soundtrack content so you can experience every detail of your home theater.

Aluminum Dome Tweeter: The CS9040 center-channel loudspeaker features one 1" aluminum dome tweeters for crystal clear highs that bring the most demanding audio soundtracks to life. The Definitive Technology tweeter is designed to play higher in frequency than what is heard by the human ear, creating an authentic reproduction of sound as the artist intends in the studio or concert hall.

BDSS (2nd Gen) Drivers: The Definitive Technology CS9040 employs two 4.5" midrange cone woofers with patented Balanced Double Surround System (BDSS) technology (2nd generation). BDSS technology improves driver excursion which results in the selected driver producing bass output usually associated with a larger driver, while retaining the improved dispersion and midrange definition of a smaller driver.

8" Bass Radiator: The top-mounted 8" bass radiator offers deeper, more impactful bass from the center-channel speaker without the need to add a separate, powered subwoofer.

Resonance-Free Cabinet: The Definitive Technology CS9040 uses a resonance-free cabinet for high performance, distortion-free sound. The speaker cabinet's maximum rigidity with strategically placed bracing improves imaging while reducing resonance, further reinforcing the speaker's clean and powerful sound.

Acoustically Transparent Grille: The CS9040 loudspeaker's cabinet is wrapped in an acoustically transparent cloth grille for unaltered sound. Thanks to the speaker's acoustically transparent grille, you'll enjoy the subtle elegance of the speaker design without having to remove a speaker grille to enjoy natural, uncolored sound.

Binding Post Terminals: The speaker terminals are 5-way binding posts that will accommodate spade connectors, single or dual banana plugs, pin-connectors, and bare wire up to 10 gauge.

Mounting & Placement Options: The Definitive Technology center-channel loudspeaker can be placed on top of a flat-surface; such as a stand, shelf, cabinet or other piece of AV furniture. Integrated rubber feet make sure the speaker stays in place and does not scratch your furniture. To optimize its performance, please follow these simple guidelines.

  • The center-channel speaker should be placed as close to the center of your television as possible without obstructing your view.
  • To receive the full benefit of the built-in bass radiator, leave at least 1-2" of space between the top of the speaker and any surface.
Note: This center-channel speaker does not offer wall-mount compatibility.

BP9000 Series: The CS9040 is part of Definitive Technology's BP9000 series line-up of speakers. Definitive Technology's BP9000 series loudspeakers is its 4th generation of bipolar tower speakers, matching center channels, surrounds, and a height speaker module, designed to offer true, full-range performance for listeners seeking the highest quality audio reproduction. The BP9000 series of loudspeakers consists of the BP9020, BP9040, BP9060 and BP9080X bipolar tower speakers; the CS9040, CS9060 and CS9080 center-channel speakers; the SR9040 and SR9080 surround speakers; and the A90 elevation speaker module supporting Dolby Atmos.

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 verify what’s in the box, 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.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Heard great reviews about Def Tech [ Kenneth  Dec 29, 2017 ]
Due to moving houses had to replace my bookshelf DT speakers with floor speakers. [ D  Nov 13, 2017 ]
To match my Def 9020. [ Luis  Aug 04, 2017 ]
My procenter that I purchased is not as good as expected. [ Carlos  Jul 30, 2017 ]
It came with the purchase of 2 BP9060 [ Damon  Dec 19, 2016 ]
Liked the deal with free center speaker (CS-9040), besides the good reviews and very knowledgeable help from Crutchfield online sales reps. [ VEENA  Dec 19, 2016 ]
Limited space in entertainment center for center channel. Owners manual states that center channel can be placed inside an entertainment center with 1-2 inch height clearance. [ Kenneth  Jul 13, 2016 ]