Klipsch or Definitive Technology? Speakers Compared in 2026
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This guide compares the Klipsch R-51M bookshelf speakers against the Definitive Technology Dymension DM20 center channel. You are looking at the klipsch vs definitive technology speaker options for different room roles. Both brands prioritize clear audio reproduction. The main difference is their intended placement. The Klipsch model is a compact bookshelf speaker. The Definitive Technology unit is a slim center channel designed for under-TV mounting.
Key differences
| Aspect | Klipsch R-51M Bookshelf Speakers | Definitive Technology Dymension DM20 Slim Center Channel |
|---|---|---|
| Speaker Type | Bookshelf | Center Channel |
| Woofer Size | Dual 5.25" spun-copper IMG | Four 4" long-throw midrange |
| Tweeter Type | 1" Aluminum LTS | 1" |
| Enclosure Type | Bass-reflex via rear-firing port | Slim 5-array |
| Dimensions | 15.3" H x 7" W x 8.5" D | 5.3" H x 30.5" W x 6.5" D |
Which one should you choose?
Choose Klipsch R-51M Bookshelf Speakers if
- You need versatile bookshelf speakers for stereo or surround setups.
- You prefer a compact footprint with rear-firing bass reflex.
- You want detailed highs from an aluminum LTS tweeter.
Choose Definitive Technology Dymension DM20 Slim Center Channel if
- You need a dedicated center channel for movie dialogue.
- You require a wide, slim speaker to fit under a TV.
- You want timbre-matched speakers within the Dymension series.
Verdict: The Klipsch R-51M suits listeners who need flexible bookshelf speakers for stereo or surround channels. The Definitive Technology DM20 is the better choice for dedicated center channel duty under a television. Your decision depends on whether you prioritize placement flexibility or specialized dialogue clarity.
Klipsch vs Definitive Technology Speaker Specs
speaker type
You need to match the speaker to its role in your system. The Klipsch R-51M is a bookshelf speaker, designed for stereo pairs or surround side channels. It offers flexibility for general music and movie listening. The Definitive Technology Dymension DM20 is a center channel speaker. It is built specifically for the front center position in a home theater setup. This design focuses on dialogue clarity and timbre matching with other Dymension series speakers. Choose the bookshelf for versatility or the center channel for dedicated movie watching.
woofer size
Low-frequency response depends heavily on driver size. The Klipsch R-51M uses dual 5.25-inch spun-copper IMG woofers. This configuration allows for more air movement and deeper bass extension compared to smaller drivers. The Definitive Technology DM20 features four 4-inch long-throw midrange woofers arranged in a 5-array. While the total surface area is comparable, the 5.25-inch drivers in the Klipsch are larger individually. Larger woofers typically provide better bass performance for music. The Definitive Technology drivers are optimized for midrange clarity rather than deep bass.
tweeter type
High-frequency detail comes from the tweeter. Both speakers use a 1-inch tweeter. The Klipsch R-51M specifies an aluminum LTS tweeter. This material is known for rigidity and fast transient response, which can add brightness and clarity to cymbals and vocals. The Definitive Technology DM20 lists a 1-inch tweeter but does not specify the material in the provided data. Aluminum is a common choice for high performance. Without specific material details for the Definitive Technology, the Klipsch offers a more defined specification for high-frequency reproduction characteristics.
enclosure type
The cabinet design affects bass efficiency and placement. The Klipsch R-51M is a bass-reflex enclosure with a rear-firing port. This design uses the port to extend bass response and increase efficiency. It requires space behind the speaker for the port to function correctly. The Definitive Technology DM20 is a center channel speaker, which typically uses a sealed or specific acoustic loading design for dialogue focus. The data does not specify the enclosure type for the Definitive Technology model. The Klipsch rear-firing port offers a clear mechanical advantage for bass output in a bookshelf form factor.
size
Physical dimensions determine where you can place the speakers. The Klipsch R-51M is compact, measuring 13.3 inches in height, 7 inches in width, and 8.5 inches in depth. It fits easily on standard bookshelves or stands. The Definitive Technology DM20 is a slim center channel, measuring 5.3 inches in height, 30.5 inches in width, and 6.5 inches in depth. Its width is significant, designed to fit under a TV or on a long media console. The Klipsch is more compact for general placement, while the Definitive Technology is wider for specific center channel mounting.
weight
Weight indicates build density and stability. The Klipsch R-51M weighs 11 pounds per pair. This is a standard weight for bookshelf speakers of this size. The Definitive Technology DM20 weighs 22.1 pounds. This single center channel speaker is significantly heavier than the entire pair of Klipsch speakers. The higher weight suggests a dense cabinet construction, which can reduce resonance and improve sound quality. The Definitive Technology unit is much heavier, indicating a robust build for its form factor.
Which speaker fits your setup best
You want flexible stereo or surround pairs
The Klipsch R-51M is a bookshelf speaker designed for stereo pairs or surround side channels. It uses dual 5.25-inch spun-copper IMG woofers and 1-inch aluminum LTS tweeters. The bass-reflex enclosure features a rear-firing port. These specs provide dynamic sound suitable for music and movies. You can place them on shelves or stands for versatile audio reproduction.
You need clear dialogue for a home theater
The Definitive Technology Dymension DM20 is a slim center channel speaker. It features a 5-array configuration with four 4-inch long-throw midrange woofers and a 1-inch tweeter. This setup delivers dynamic sound with ultra-clear vocals. The design allows placement in cabinets or wall-mounting under your TV. It is timbre-matched to other Dymension series speakers for seamless surround sound.
You prefer a compact design for tight spaces
The Definitive Technology Dymension DM20 has a slim profile measuring 5.3 inches in height. Its discrete design is wrapped in an acoustically transparent black cloth grille. This minimalistic look helps it disappear into your room. You can use it as a center channel or LCR speaker. The compact dimensions make it ideal for tight spaces or wall mounting.
The products compared
Klipsch R-51M Bookshelf Speakers
Best for: small rooms needing efficient horn-loaded sound
- Speaker Type
- bookshelf
- Woofer Size
- 5.25" spun-copper IMG woofers
- Configuration
- dual 5.25" woofers
- Tweeter Type
- 1" aluminum LTS tweeters
- Enclosure Type
- bass-reflex via rear-firing port
- Dimensions
- 8.46 × 7.01 × 15.3 inches
View on Amazon: Klipsch R-51M Bookshelf Speakers Affiliate link
The Klipsch R-51M bookshelf speakers use 1-inch aluminum LTS tweeters and dual 5.25-inch spun-copper IMG woofers. They feature 90x90 Square Tractrix Horns and a bass-reflex design with a rear-firing port. The pair measures 15.3 inches high and weighs 11 pounds each. You get clear highs and defined bass in a compact black enclosure. This setup suits listeners who want efficient, horn-loaded sound in a small footprint.
Pros
- 1-inch aluminum LTS tweeters for detailed highs
- Dual 5.25-inch spun-copper IMG woofers
- 90x90 Square Tractrix Horns for wide dispersion
- Rear-firing bass-reflex port for enhanced low end
Cons
- Rear-firing port requires space behind the speaker
- No included wall-mounting hardware listed
- Only available in black finish
Good fit if
- You need efficient bookshelf speakers for a small room
- You prefer horn-loaded tweeters for clarity
- You have space behind your shelves for the port
Skip if
- You require front-firing ports for tight wall placement
- You need multiple color options
- You want a center channel speaker
Verdict: Klipsch R-51M Bookshelf Speakers deliver efficient, horn-loaded sound in a compact package. You should buy them if you value tweeter clarity and have space for rear-firing ports.
Definitive Technology Dymension DM20 Slim Center Channel
Best for: clear dialogue in tight TV spaces
- Speaker Type
- Center Channel
- Woofer Size
- 4"
- Configuration
- 5-Driver Array
- Application
- Home Theater
- Dimensions
- 6.5 × 30.5 × 5.3 inches
- Weight
- 22.1 pounds
View on Amazon: Definitive Technology Dymension DM20 Slim Center Channel Affiliate link
The Definitive Technology DM20 is a slim center channel speaker designed for home theater setups. It uses a 5-array configuration with four 4-inch midrange woofers and a 1-inch tweeter to deliver clear dialogue. Measuring 30.5 inches wide and 5.3 inches tall, it fits easily under a TV or on a shelf. This speaker timbre-matches with other Dymension series models for a cohesive surround sound experience.
Pros
- Five-array driver configuration for dynamic sound
- Slim 5.3-inch height fits under most TVs
- Timbre-matched to Dymension series speakers
- Supports wall-mounting for discreet placement
Cons
- Single 1-inch tweeter limits high-frequency dispersion
- No included mounting hardware or remote
- Sold separately from main surround speakers
Good fit if
- You need a center speaker that fits under your TV
- You already own other Dymension series speakers
- You prioritize clear dialogue in movies
Skip if
- You want a speaker with a larger tweeter
- You need a complete 5.1 system in one box
- You prefer a floor-standing center channel
Verdict: Definitive Technology DM20 Slim Center Speaker offers a compact solution for users who need clear dialogue and have existing Dymension speakers. It is best for tight spaces under modern TVs.
Specifications side by side
| Spec | Klipsch R-51M Bookshelf Speakers | Definitive Technology Dymension DM20 Slim Center Channel |
|---|---|---|
| Speaker Type | bookshelf | Center Channel |
| Woofer Size | 5.25" spun-copper IMG woofers | 4" |
| Configuration | dual 5.25" woofers | 5-Driver Array |
| Tweeter Type | 1" aluminum LTS tweeters | not stated |
| Enclosure Type | bass-reflex via rear-firing port | not stated |
| Application | not stated | Home Theater |
| Dimensions | 8.46 × 7.01 × 15.3 inches | 6.5 × 30.5 × 5.3 inches |
| Weight | 11 pounds | 22.1 pounds |
| Size | Pair | not stated |
| Color | Black | Black |
| Model | R-51M | Dymension DM20 |
Frequently asked questions
Can I use the Klipsch R-51M as a center channel speaker?
You can use the Klipsch R-51M as a center channel, but it is designed as a bookshelf speaker. It comes in a pair, which allows for stereo or surround setups. However, the Definitive Technology DM20 is a dedicated center channel. The DM20 is wider, measuring 30.5 inches, making it better suited for mounting under a TV. The Klipsch model is narrower at 8.46 inches.
Which speaker is better for small rooms?
The Klipsch R-51M is ideal for small rooms needing efficient sound. It is a compact bookshelf speaker with a height of 15.3 inches. The Definitive Technology DM20 is a slim center channel, 5.3 inches tall but 30.5 inches wide. If you need stereo pairs for a small space, the Klipsch pair is the practical choice. The DM20 is best for dialogue in tight TV spaces.
Do these speakers come in pairs?
The Klipsch R-51M is sold as a pair of bookshelf speakers. This configuration supports stereo listening or surround sound side channels. The Definitive Technology DM20 is a single center channel speaker. You buy one unit for your TV setup. The Klipsch package includes two speakers, while the Definitive Technology item is a single component.
What are the dimensions of the Definitive Technology DM20?
The Definitive Technology Dymension DM20 measures 30.5 inches in width, 5.3 inches in height, and 6.5 inches in length. It weighs 22.1 pounds. This slim profile makes it suitable for tight spaces under modern televisions. The Klipsch R-51M is much smaller, measuring 15.3 inches tall, 7.01 inches wide, and 8.46 inches deep per speaker.
Is the Klipsch R-51M suitable for rear-firing ports?
Yes, the Klipsch R-51M features rear-firing ports. You should buy them if you have space for these ports behind the speaker. The bass-reflex enclosure design relies on this rear output. The Definitive Technology DM20 is a center channel designed for front-facing dialogue. It does not share the same bookshelf port configuration as the Klipsch model.
Which brand offers a dedicated center channel option?
Definitive Technology offers the Dymension DM20 as a dedicated center channel speaker. It is designed specifically for clear dialogue in home theater setups. Klipsch offers the R-51M as a bookshelf speaker. While bookshelf speakers can serve as centers, the DM20 is built for that specific role. It is wider and optimized for TV placement.
How heavy is the Klipsch R-51M compared to the DM20?
Each Klipsch R-51M speaker weighs 11 pounds. Since they come in a pair, the total weight is 22 pounds. The single Definitive Technology DM20 weighs 22.1 pounds. The individual Klipsch units are lighter, making them easier to place on shelves. The DM20 is heavier due to its larger center channel cabinet design.