Short answer: the Arendal 1528 Monitor 8 for better sound quality, the GR-Research X-LS Encore for the lower price. The Arendal 1528 Monitor 8 ranks #22 of 130 bookshelf speakers at $6000. The GR-Research X-LS Encore ranks #83 at $1300, $4700 cheaper.
What the GR-Research X-LS Encore offers: An amazing value, especially if you managed to snag one of these built by AV123 in the early 2000s for $200-300. CEA2034 spinorama shows a generally flat on-axis response, especially in the listening window. Predicted in-room response is generally smooth and on-target. Distortion at 86dB SPL/1m is pretty clean above 200Hz. Watch for: A slight depression in the upper bass and some peaking in the lower bass shows up on-axis, along with directivity error in the crossover region. Vertical directivity requires staying within about 20 degrees of the tweeter axis. At 96dB SPL/1m distortion becomes “rather unhappy,” with bass distortion, a possible woofer issue around 2kHz, and a tweeter problem above 7kHz. As a DIY kit, it requires building the cabinet and crossover yourself.
What the Arendal 1528 Monitor 8 offers: Three-way design featuring a 28mm tweeter, 5” mid-range, and dual 8” mid-bass drivers in a convertible sealed/ported HDF cabinet, with a supplied port bung for sealed operation near a wall. In ported configuration, reaches down to about 35Hz in most rooms (F3 41Hz, F10 26Hz) - deep enough that many listeners could skip a subwoofer unless they want output below 40Hz. Extremely low distortion and compression across the board (harmonic, multitone, and both long- and short-term compression testing) - among the best the reviewer has tested at this price, beating speakers costing twice as much. Wide, consistent horizontal soundstage of about ±60°. Smooth, non-fatiguing high frequency rather than the elevated “detail” boost common on speakers marketed for resolution. A slight forwardness around 1.5kHz adds a touch of attack without tipping into brightness. Watch for: A dip in the midbase around 100Hz noticeably reduces the “chestiness” of male vocals compared to the reviewer’s reference speaker. A diffraction-related flare in the upper-midrange/lower-treble (around 1.5-2kHz) gives a mild forwardness that benefits from sidewall absorption panels, though it’s not a major issue. Vertical sweet spot is fairly narrow at about ±20° - a bigger consideration for multi-row home theater seating than rivals like the MoFi SourcePoint 8, which manages about ±60°. The MoFi SourcePoint 8, a similarly-priced rival, also has more linear bass with no midbase dip, at the cost of a more elevated top end. Minor resonances appear around 400Hz and 800Hz in measurements, though the reviewer considers them inaudible or insignificant. Very heavy (about 104 lbs each) HDF cabinet requires dedicated, sturdy stands. Low EPDR (dips to about 1.9 ohms in two spots) means a Class AB amplifier needs to comfortably handle a 4-ohm load without overheating; a Class D amp is a safer choice for full-range use.
Buy the GR-Research X-LS Encore if the price matters more than sound quality. Buy the Arendal 1528 Monitor 8 if sound quality matters more than the price.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| GR-Research X-LS Encore | Arendal 1528 Monitor 8 | |
|---|---|---|
| Price | $1300 per pair | $6000 per pair |
| Ranked | #83 of 130 in Large Size Bookshelf Speakers | #22 of 130 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 44Hz (measured, Audio Science Review) | 26Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 64Hz (measured, Audio Science Review) | 41Hz (measured, Erin's Audio Corner) |
| Dimensions | 13.5"H x 8.5"W x 12.1"D (342.9 x 215.9 x 308 mm) | 31.8"H x 11.4"W x 17.6"D (807.7 x 289.6 x 447 mm) |
| Impedance | 8 ohms | 4 ohms nominal, 3.8 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 84.4dB (measured by Audio Science Review; 87dB manufacturer specified) | 84.4dB (measured, Erin's Audio Corner) |
| Drivers | 6.5" Peerless M-165 paper composite cone, non-resonant polymer frame woofer, 1" Peerless India T26SG tweeter | Dual 8" woofers, 5" midrange, 28mm tweeter |
| Weight | 17 lbs (7.7 kg) each | 103.6 lbs (47 kg) each |
| Woofer Cabinet | ported | ported |
| Spinorama Preference Score | - | 4.70 |
| Spinorama Preference Score with Perfect Sub | - | 6.16 |
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Prices on this page were last checked September 16, 2026 at 12:41 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
GR-Research X-LS Encore: $1300 per pair Gr-research eBay
Pros: An amazing value, especially if you managed to snag one of these built by AV123 in the early 2000s for $200-300. CEA2034 spinorama shows a generally flat on-axis response, especially in the listening window. Predicted in-room response is generally smooth and on-target. Distortion at 86dB SPL/1m is pretty clean above 200Hz. Measured bass extension of 64Hz (-3dB), with a measured sensitivity of 84.4dB.
Cons: A slight depression in the upper bass and some peaking in the lower bass shows up on-axis, along with directivity error in the crossover region. Vertical directivity requires staying within about 20 degrees of the tweeter axis. At 96dB SPL/1m distortion becomes “rather unhappy,” with bass distortion, a possible woofer issue around 2kHz, and a tweeter problem above 7kHz. As a DIY kit, it requires building the cabinet and crossover yourself.
Full GR-Research X-LS Encore review and specifications →
| Bass Extension (-10dB) | 44Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 64Hz (measured, Audio Science Review) |
| Dimensions | 13.5"H x 8.5"W x 12.1"D (342.9 x 215.9 x 308 mm) |
| Drivers | 6.5" Peerless M-165 paper composite cone, non-resonant polymer frame woofer, 1" Peerless India T26SG tweeter |
| Impedance | 8 ohms |
| Sensitivity | 84.4dB (measured by Audio Science Review; 87dB manufacturer specified) |
| Weight | 17 lbs (7.7 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- GR-Research X-LS Encore vs Dynaudio Special Forty
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- GR-Research X-LS Encore vs ELAC Debut 2.0 B6.2
- GR-Research X-LS Encore vs SVS Prime Bookshelf
- GR-Research X-LS Encore vs KEF Q3 Meta
- GR-Research X-LS Encore vs Polk Monitor XT20
- GR-Research X-LS Encore vs Philharmonic BMR Monitor
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Arendal 1528 Monitor 8: $6000 per pair Arendalsound eBay
Pros: Three-way design featuring a 28mm tweeter, 5” mid-range, and dual 8” mid-bass drivers in a convertible sealed/ported HDF cabinet, with a supplied port bung for sealed operation near a wall. In ported configuration, reaches down to about 35Hz in most rooms (F3 41Hz, F10 26Hz) - deep enough that many listeners could skip a subwoofer unless they want output below 40Hz. Extremely low distortion and compression across the board (harmonic, multitone, and both long- and short-term compression testing) - among the best the reviewer has tested at this price, beating speakers costing twice as much. Wide, consistent horizontal soundstage of about ±60°. Smooth, non-fatiguing high frequency rather than the elevated “detail” boost common on speakers marketed for resolution. A slight forwardness around 1.5kHz adds a touch of attack without tipping into brightness. Measured bass extension of 41Hz (-3dB), with a measured sensitivity of 84.4dB.
Cons: A dip in the midbase around 100Hz noticeably reduces the “chestiness” of male vocals compared to the reviewer’s reference speaker. A diffraction-related flare in the upper-midrange/lower-treble (around 1.5-2kHz) gives a mild forwardness that benefits from sidewall absorption panels, though it’s not a major issue. Vertical sweet spot is fairly narrow at about ±20° - a bigger consideration for multi-row home theater seating than rivals like the MoFi SourcePoint 8, which manages about ±60°. The MoFi SourcePoint 8, a similarly-priced rival, also has more linear bass with no midbase dip, at the cost of a more elevated top end. Minor resonances appear around 400Hz and 800Hz in measurements, though the reviewer considers them inaudible or insignificant. Very heavy (about 104 lbs each) HDF cabinet requires dedicated, sturdy stands. Low EPDR (dips to about 1.9 ohms in two spots) means a Class AB amplifier needs to comfortably handle a 4-ohm load without overheating; a Class D amp is a safer choice for full-range use.
Full Arendal 1528 Monitor 8 review and specifications →
| Bass Extension (-10dB) | 26Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 41Hz (measured, Erin's Audio Corner) |
| Dimensions | 31.8"H x 11.4"W x 17.6"D (807.7 x 289.6 x 447 mm) |
| Drivers | Dual 8" woofers, 5" midrange, 28mm tweeter |
| Impedance | 4 ohms nominal, 3.8 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 84.4dB (measured, Erin's Audio Corner) |
| Spinorama Preference Score | 4.70 |
| Spinorama Preference Score with Perfect Sub | 6.16 |
| Weight | 103.6 lbs (47 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Arendal 1528 Monitor 8 vs Ascend Acoustics CMT-340 SE2
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