Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
Product Strengths
- Sturdily built and beautifully finished, with real-mahogany wood veneer
- High sensitivity (90db), making them tube-friendly and easy to drive
- Laid-back tonal signature, making them easy to listen to for extended periods
- Clear and openly defined midrange
- Punches well above their weight and did not sound out of place on the reviewer's system
Product Considerations
- Bass may be a touch loose—in a warm fashion
- Not overly detailed or 'fast' compared to some other speakers
Comparisons (according to reviewers)
- Knight 4's are not as 'fast' compared to the Linn/Naim sonic signature
Takeaway: The Knight 4 loudspeakers are beautiful and easy to listen to. For those seeking quality speakers around this price, they are worth checking out, as they sound better than one might expect.
All
Knight 4
reviews

Manufacturer details
- Model: Knight 4
- Function: 2 channel
- Format: Floorstanding
- Bass Driver: 2 x 130mm
- Tweeter: 25mm
- Amplifier Power (rec.): 25 - 150W
- Impedance (Nominal): 8 Ohms
- Sensitivity (1W@1M): 90 dB
- Nominal Frequency Range: 36Hz - 24kHz
- Freq. Fb: 45Hz
- Crossover Frequency: 3 kHz
- Dimensions (HxWxD): 840 x 165 x 270 mm
- Height on plinth and spikes: 900 mm
- Net Weight: 12.5 kg (27.5 lbs)
- Gross Weight: 27.1 kg (59.6 lbs)
- Carton Size: 970 x 330 x 450 mm
- Finishes: Specially selected Deep Figured Veneers sealed with 'natural feeling' semi matt clear lacquer
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- Castle speakers prioritize hand-crafted cabinetry using real wood veneers, meticulously book-matched and finished, reflecting a commitment to furniture-grade aesthetics.
- The brand uses transmission line loading in their speaker designs, particularly in floor-standing models, to achieve deeper and more controlled bass response without relying on bass-reflex ports.
- Castle frequently employs ribbon tweeters in their higher-end models, valuing their ability to deliver detailed and extended high frequencies, enhancing the reproduction of instrumental textures.
- They often use woven cones (carbon fiber or polypropylene) in their drivers, aiming for a balance of stiffness, lightness, and controlled resonance to improve overall sound quality and accuracy.
Select products
Richmond IV
- Position: A compact, standmount speaker that offers a classic monitor approach.
- Description: Delivers a surprisingly wide and detailed sound from a miniature design, thanks to a larger drive unit and updated cabinet damping. Compared to floorstanding models like the Avon 5 and Knight series, it suits small rooms and tighter budgets while meeting basic functionality needs.
Avon 5
- Position: A floorstanding speaker with transmission line technology.
- Description: Uses twin drive transmission line technology to ensure smooth, full-spectrum performance in a refined cabinet with real wood veneers. Unlike the compact Richmond IV and the more traditional Knight speakers, it targets users with larger spaces who need advanced technology.
Knight 4
- Position: A floorstanding model that emphasizes natural tone and meticulous wood veneer craftsmanship.
- Description: Offers balanced, clear sound reinforced by its unique cabinet design and acoustic control. When compared to the Avon 5 and the more robust Knight 5, it provides an economy in design and build quality for buyers with focused sonic goals.
Knight 5
- Position: A robust floorstanding speaker in the Knight range with enhanced power handling.
- Description: Builds on traditional design with larger drivers and a higher recommended amplifier power for improved bass and dynamic range. Compared to the lighter Knight 4 and compact Richmond IV, it caters to users in larger settings.
Windsor Duke
- Position: A high-end bookshelf speaker distinguished by premium craftsmanship and advanced drive integration.
- Description: Features cast-alloy drive units with woven cone technology and hand-finished veneers to minimize distortion and deliver superior clarity in a compact format. In contrast to floorstanding options like the Avon 5 and Knight series, its exceptional construction and detail make it stand out in the lineup.
Our take on the brand
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Used
Castle
What if you spend more?
Product Strengths
- Flat in-room frequency response, especially from 200 Hz upwards, contributes to accurate sound reproduction
- Amplifier and receiver friendly due to its high sensitivity and 8-ohm impedance, performing well with entry-level to flagship AV receivers and amplifiers
- The new, larger Tractrix horn waveguide design offers improved directivity control and high-frequency focus
- Excels in dynamics, delivering raw impact and presence that enhances the excitement of movies and gaming, as well as rock and electronica music
Product Considerations
- Treble might become fatiguing with lesser recordings or at higher volumes, and may not be agreeable with all genres for listeners seeking a very smooth top end
- The midrange, while linear, isn't completely neutral due to some cabinet resonance, adding extra energy that may or may not be desirable depending on listener preference
- For true full-range playback, a subwoofer is required to compensate for the lack of deep bass extension
- The vinyl finish may disappoint fans of natural materials
- Best listened at within a 5-degree angle, and listening at a height level with the tweeter is clearly the best choice
Comparisons (according to reviewers)
- Vs. Polk R700: R700 is a more versatile all-rounder, but preferred for rock and electronica
- Vs. Sonus Faber Lumina 5: The Sonus Faber is better built and looks nicer, but more refined
- Vs. Q Acoustics Concept 50s: The Concept 50s image a little better, disappear just a little bit better, and they are exceptional off-axis, but do not play as low
- Vs. Heco Aurora 1000: The Heco is more linear across the range
- Vs. SVS Prime Pinnacle: The SVS Prime Pinnacle has a tweeter that is lower in level, offering a warmer sound
Takeaway: The Klipsch RP-8000F Mark II is a speaker that brings a dynamic sound to movies, gaming, and music. For speakers that are easy to set up, are amplifier-friendly and deliver punchy, clear audio, these could be a great option.
Video review
Our take on the brand
Following in the footsteps of the highly acclaimed LRS, the LRS+ takes it up a notch. "This is another slam-dunk POY (Product of the Year) nominee, and, IMO, the best buy (along with the MG1.7i) in an affordable loudspeaker for modest-sized rooms.” 2022 Golden Ear Award. Jonathan Valin, October 7th, 2022
Our summary
Product Strengths
- Creates a very open and transparent soundstage, which crosses the threshold of believability in a small to medium-sized room
- Low distortion, especially in the midrange and upper bass, making listeners realize how imperfectly transparent many speakers are
- Highly resolving, with impressive performance on acoustical instruments and vocal reproduction
- Offers a unique and remarkable experience due to the story and love behind the speaker's creation
- Presents a challenge, helping users understand speaker positions as the sound changes completely with movement
- Considered 'eminently affordable' and provides incredible sound for the price
Product Considerations
- Requires significant time to install, tweak, and dial in due to its dipole design, making positioning critical
- Bass is not powerful—it doesn't do pounding bass, and listeners won't feel the bass pounding on their chest, so a subwoofer might be needed, especially for rock, pop, dance, and electronic music
- Needs good power and high current to sound clean and not cause fatigue, it is not a powerful-sounding speaker
- The stand included is considered subpar and not very versatile
Comparisons (according to reviewers)
- Vs the original LRS, the LRS+ has ameliorated treble, has smoother upper mids, and has a reduced nosedive in the power range and midbass
Takeaway: The Magnepan LRS+ is a special speaker with an open soundstage, great details, and makes music sound real and enjoyable. Though not perfect, it is well worth buying because it offers an excellent way to experience a panel speaker without spending too much.
Video review
Our take on the brand
Our summary
Product Strengths
- The Emit 30 delivers a satisfying and full-bodied sound, particularly excelling in the midrange, making vocals, piano, strings, and horns sound 'right'
- Bass performance is impressive for its size, delivering clean, fast, and airy bass with low distortion
- Good clarity and detail, rendering a wide range of recordings
- Good dynamics and energy, making music lively and engaging
- Top-notch build quality
Product Considerations
- The Emit 30's presentation might favor sophistication over excitement, with rhythmic drive being somewhat muted
- High-frequency non-linearity
- Some reviewers found the upper frequencies 'off', sometimes a little too soft
- The vinyl finish may be a drawback for some, as it is not as luxurious as real wood veneers
- Speakers like a bit of power
Comparisons (according to reviewers)
- Vs Triangle Comet: The Emit 30 is rich, warm, and sweet, whereas the Comet is fast, quick, hyper-detailed, and exciting
- Vs KEF LS50 Meta: The Emit 30 gives a more complete, full-bodied sound, while the LS50 offers clearer vocals and more air
Takeaway: The Dynaudio Emit 30 is a well-rounded speaker that offers a satisfying and engaging listening experience with impressive bass and midrange performance. It's a great value for those seeking a refined and capable floorstanding speaker without breaking the bank.
Video review
Our take on the brand
The AE109² is designed to offer effortless, room filling performance from a slim-line floor-standing loudspeaker in much the same way the world acclaimed original AE109 did 20 years ago. To do this, two 130mm paper drivers utilising an ultra-high force motor system are used in partnership with a 25mm soft dome tweeter. The 2.5-way crossover features a unique topology allowing integration and power handling previously un-achievable from this type of speaker. Particular attention has been paid to the phase and time alignment for the most cohesive performance possible. Like the AE100² stand-mount speaker, the driver and crossover are housed within a substantial 15mm HDF cabinet that takes styling cues from the award winning 500 Series. The result is an audio product with clean and uncluttered lines that can still deliver the thrilling and powerful presentation Acoustic Energy owners have come to expect. Black and walnut vinyl veneer finishes are available.
Our summary
Product Strengths
- Well-rounded sound for the price
- Easy to drive with various amplifiers
- Easy to place in a room, even close to a wall, thanks to the rear slot port design
- Wide sound dispersion, making them suitable for enjoying with friends and family
- Smooth, warm, and non-fatiguing sound, suitable for long listening sessions
Product Considerations
- Bass can sometimes muddy the midrange, especially with tone controls that increase bass
- Soundstage depth may fall a bit short compared to more expensive speakers
- The provided spikes attach directly to the base of the cabinet, which could affect side-to-side stability
- Accessories could be better
Comparisons (according to reviewers)
- Vs Magnepan LRS+—AE109² easier to own, less finicky with amp requirements and placement, and better for sharing due to wider sweet spot, though Magnepan sounds better
- Vs DALI Spektor 6—AE109² presents a genuine challenge, with better looks, though DALI has more 'fizz' of excitement
Takeaway: The AE109² is a budget-friendly floorstanding speaker that provides a balanced and enjoyable listening experience, especially for those prioritizing ease of placement and a wide soundstage. These speakers are a great option for creating a solid system.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- Sleek design with a balanced aesthetic
- Big, warm, and muscular sounding presentation
- Treble response is a little elevated, yet very easy to listen to
- Midrange has a warm, full-bodied sound with real scale and density
- Imaging is a strong suit, providing a good locked-in center image and wide soundstage
Product Considerations
- The speaker can sound shouty in the higher frequencies, specifically around 4-6kHz
- Bass can be too strong—thick in some rooms, and a subwoofer might be needed for deep bass
- High frequencies narrow rapidly when not aimed directly at the listener, reducing 'air'
- The up-firing Dolby Atmos configuration may not be the best immersive experience
- Dynamic output is okay but not as agile as other speakers
Comparisons (according to reviewers)
- The R500 has more emphasis in the treble, richer midrange, stronger bass, and better imaging compared to the Elac Debut Reference Series, while the Elac Debut Reference Series is more balanced sounding
- The R500 is easier to work with, has a fuller mid-range scale, and stronger bass compared to the Wharfedale Evo line, while the Wharfedale Evo line has greater resolution and refinement
- The R500 is smoother, more forgiving of poor recordings, has a warmer midrange, stronger bass, and superior imaging compared to Klipsch
- Driver integration and bass are better than the Triangle Borea Series, while the Borea series has a more open and brighter sound
- The R500 is smoother, more resolute, has better driver integration, a fuller mid-range, stronger bass, and better imaging compared to the Polk Signature Line
Takeaway: The Polk R500 is a good speaker overall and offers a big, warm sound that works well with most music. It's a stylish speaker that offers great value and ease of use.
Video review
Our take on the brand
Our Summary
Product Strengths
- Good neutral response top to bottom
- Detailed and articulate treble response without being too forward or bright
- Excellent soundstage and dynamics for the price
- Bass is weighty and deeper feeling than its measurements convey
- Nice looking exterior, especially for the price
Product Considerations
- Bass requires a subwoofer for full-range playback
- Tweeter can lose composure at high volumes
- Can require more volume than some other speakers
- With aggressive music, mid-range and low frequencies can sound like a traffic jam
- Grills are thin and flimsy
Comparisons (according to reviewers)
- Versus Klipsch R800F, the Polk XT60 is better, the R800F has messier bass, cabinet distortion, and port noise
- Versus Polk R700, the R700 is a demonstrably better loudspeaker with better bass, a better ability to handle volume and dynamic swings, and unflappable high frequencies
Takeaway: The Polk XT60 is a great entry-level tower speaker that offers surprisingly accurate sound and good performance for the price. It's a solid choice for building a home theater system or enjoying music.
Video review
Our take on the brand
Our Summary
Product Strengths
- Good, solid build quality
- Wide dispersed soundstage
- Good bass, and a subwoofer is not usually needed
- Punch higher than their price should be
- The drivers are specially designed for the mid-century to reproduce its noise, in addition to a more significant dispersion
Product Considerations
- The crystal clear and sharp noise is insufficient for the complete noise operation
- To receive the optimal adventure, one ought to use a surround sound installation having a subwoofer, rear or front
- Clients that are searching for an entire audio performance aren't advocating this item
- Amazon alone urges mixing the speakers together with all the Polk Audio PSW10 10-inch Driven Subwoofer, and also the Polk Audio CS10 Center Channel Speaker
- Polk Audio does not sell these anymore
Comparisons (according to reviewers)
- The Polk Audio Monitor 60 Series 2 had a more neutral—balanced sound than Klipsch speakers
Takeaway: The Polk Audio Monitor 60 Series 2 speakers sound very good and look stylish, making them a great option for people on a budget or with smaller rooms. They offer good quality audio for everyday use and fill the room with sound.
Video review
Our take on the brand
Our Summary
Product Strengths
- Super attractive and beautiful to look at
- Hard hitting speaker
- A lot of mid-bass, very authoritative
- Very strong bass
- Good efficiency
Product Considerations
- Piano black finish is a fingerprint magnet and prone to micro scratches
- Vocals aren't the last word in clarity
- Not an audiophile speaker
- Highs were ok, but metallic
Comparisons (according to reviewers)
- Faithfulness to horns is not as good as Klipsch
- Doesn't have the same instrument separation as Polk
Takeaway: The NS-777 speakers are beautiful and fun to listen to, especially for rock and hip-hop music, because of their hard-hitting sound and strong bass. They are efficient and provide a satisfying musical experience.
Video review
Our take on the brand
Our Summary
Product Strengths
- Ample sub-bass response eliminates the need for a separate subwoofer
- Performs very well in movies, providing a cinematic experience
- Sounds natural with ample clarity for vocal separation when used for movies
Product Considerations
- The veneer finish looks basic and somewhat cheap
- When the volume is pushed, the bass becomes more bloomy, and the mids become slightly more confused—mid performance and bass are areas of weakness
- It isn't geared toward audiophiles looking for pure fidelity, and other speakers may outperform it in detail retrieval and technical aspects for music listening
Comparisons (according to reviewers)
- Vs Polk ES60: The Polk ES60 has a far more stylized housing
- Vs Emotiva B1+: The Emotiva B1+ significantly outperforms it in detail retrieval and technicals for music listening
Takeaway: The Polk Monitor XT70 is a versatile speaker, great for both movies and music, especially because it delivers a powerful bass response. It's an ideal choice for anyone looking to simplify their setup and enjoy an immersive sound experience without needing extra equipment.
Video review
Our take on the brand
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