Short answer: the KEF LS50 Wireless II for better sound quality, the Presonus Eris E5 XT for the lower price. The KEF LS50 Wireless II ranks #16 of 48 powered bookshelf speakers at $2749.99. The Presonus Eris E5 XT ranks #19 at $119.99, $2630 cheaper.
On the KEF LS50 Wireless II side: Uni-Q coincident driver array (130mm aluminum woofer with a 25mm MAT dome tweeter mounted at its acoustic center) gives excellent, consistent off-axis dispersion, measuring the tightest directivity spread of this batch alongside a smooth listening-window response. The catch: Primary/Secondary architecture means one speaker handles every input while the other depends on a wireless or wired Ethernet link back to it - placement is less flexible than a fully symmetric pair.
The case for the Presonus Eris E5 XT: CEA2034 spinorama shows very smooth, consistent directivity through the crossover region and into the treble, with early reflections tracking the on-axis curve closely. Set against that: On-axis response is uneven, with peaks at both frequency extremes and a dip around the roughly 3kHz crossover, giving a bass-and-treble-heavy tonal balance with the midrange partially recessed.
Buy the KEF LS50 Wireless II if sound quality matters more than the price. Buy the Presonus Eris E5 XT if the price matters more than sound quality.
Specifications Side By Side
| KEF LS50 Wireless II | Presonus Eris E5 XT | |
|---|---|---|
| Price | $2,749.99 | $119.99 |
| Ranked | #16 of 48 in Medium Size Powered Bookshelf Speakers | #19 of 48 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-10dB) | 41.5Hz (measured, spinorama.org) | 65Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 51.3Hz (measured, spinorama.org) | 85Hz (measured, Audio Science Review) |
| Inputs | HDMI eARC, optical, digital coaxial, 3.5mm analog, USB-A (service), Ethernet, RCA subwoofer out | TRS, XLR, RCA |
| Drivers | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter | 5" (127mm) woofer |
| App | KEF Connect (placement EQ presets, source selection, firmware updates) | No |
| Bluetooth | Yes, 4.2 | No |
| EQ | Yes, fixed placement presets (desk/bookshelf/wall-mount) - no automatic room correction | Yes (Room adjustment) |
| Weight | 44.3 lbs / 20.1 kg (44.3 lb) for the pair | 10.1 lbs / 4.6 kg each |
| Output Power | 280W (LF) + 100W (HF) per speaker, bi-amped | 80w Per Speaker |
| Dimensions | 12" x 7.9" x 12.2" (305 x 200 x 311 mm) (12.0 x 7.9 x 12.2 in) each | 10.2"H x 7"W x 7.7"D (259.1 x 177.8 x 195.6 mm) |
| Frequency Response | 45Hz - 28kHz ±3dB | 53Hz - 22kHz (Manufacturer specified) |
| Max SPL | 108dB at 1m | - |
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The Two Speakers In Full
KEF LS50 Wireless II: $2,749.99 Amazon KEF Crutchfield
Pros: Uni-Q coincident driver array (130mm aluminum woofer with a 25mm MAT dome tweeter mounted at its acoustic center) gives excellent, consistent off-axis dispersion, measuring the tightest directivity spread of this batch (directivity_spdi_stddev 3.96) alongside a smooth listening-window response (smoothness_listening_window 0.375, aad_on_axis 0.343). Bass extends to a genuinely deep 51.3Hz at -3dB / 41.5Hz at -10dB for a compact standmount, backed by a bi-amped 280W (LF) + 100W (HF) design. One of the most complete input sets in its class: HDMI eARC, optical, coaxial, RCA, Ethernet, AirPlay 2, Chromecast, Roon Ready, and Spotify/Tidal Connect, so it can replace a full receiver-based setup for TV, turntable, and streaming use.
Cons: Primary/Secondary architecture means one speaker handles every input while the other depends on a wireless or wired Ethernet link back to it - placement is less flexible than a fully symmetric pair. No mic-based automatic room correction, only fixed placement EQ presets in the KEF Connect app. Bass alignment Q (lfq 0.676) sits toward the higher end of typical ported values. At $2,999.99/pair it’s roughly double the price of KEF’s own smaller LSX II.
Full KEF LS50 Wireless II review and specifications →
| App | KEF Connect (placement EQ presets, source selection, firmware updates) |
|---|---|
| Bass Extension (-10dB) | 41.5Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 51.3Hz (measured, spinorama.org) |
| Bluetooth | Yes, 4.2 |
| Dimensions | 12" x 7.9" x 12.2" (305 x 200 x 311 mm) (12.0 x 7.9 x 12.2 in) each |
| Drivers | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter |
| EQ | Yes, fixed placement presets (desk/bookshelf/wall-mount) - no automatic room correction |
| Frequency Response | 45Hz - 28kHz ±3dB |
| Inputs | HDMI eARC, optical, digital coaxial, 3.5mm analog, USB-A (service), Ethernet, RCA subwoofer out |
| Max SPL | 108dB at 1m |
| Output Power | 280W (LF) + 100W (HF) per speaker, bi-amped |
| Weight | 44.3 lbs / 20.1 kg (44.3 lb) for the pair |
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- Links
- Reviews, Comparisons and Sound Samples
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Presonus Eris E5 XT: $119.99 Amazon
Pros: CEA2034 spinorama shows very smooth, consistent directivity through the crossover region and into the treble, with early reflections tracking the on-axis curve closely.
Cons: On-axis response is uneven, with peaks at both frequency extremes and a dip around the roughly 3kHz crossover, giving a bass-and-treble-heavy tonal balance with the midrange partially recessed. Because directivity is otherwise good, room reflections closely mirror that same imbalance rather than smoothing it out. At 96dB SPL distortion spans a wide range of frequencies, and while dropping to 86dB helps, the woofer or its amplifier remains the weak link.
Full Presonus Eris E5 XT review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 65Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 85Hz (measured, Audio Science Review) |
| Bluetooth | No |
| Dimensions | 10.2"H x 7"W x 7.7"D (259.1 x 177.8 x 195.6 mm) |
| Drivers | 5" (127mm) woofer |
| EQ | Yes (Room adjustment) |
| Frequency Response | 53Hz - 22kHz (Manufacturer specified) |
| Inputs | TRS, XLR, RCA |
| Output Power | 80w Per Speaker |
| Weight | 10.1 lbs / 4.6 kg each |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- DSAUDIO.review: New PreSonus E5 XT and Yamaha HS5 could not sound any more different! SOUND AND RESPONSE COMPARISON
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- DSAUDIO.review: PreSonus Eris E5 XT vs PreSonus Eris E5 (new vs old) Sound & Frequency Response Comparison
- DSAUDIO.review: PreSonus E7 XT vs PreSonus E5 XT Sound & Frequency Response Comparison
- DSAUDIO.review: PreSonus Eris E8 XT vs PreSonus Eris E5 XT Sound & Frequency Response Comparison
- DSAUDIO.review: PreSonus E5 XT vs KRK Rokit 5 G4 Sound & Frequency Response Comparison
- Audio Science Review Measurements
- Audio Science Review Measurements (spinorama.org)
- Reddit Search for Presonus Eris E5 XT Review
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