Short answer: the REL Acoustics T/9x. Both are rated 3.9/5 for sound quality (#47 and #35 of 212 subwoofers), and the REL Acoustics T/9x costs $1,549 against $1,650 for the Arendal 1723 Subwoofer 1S, and with sound quality even, the cheaper one is the better buy.
What the Arendal 1723 Subwoofer 1S does well: Premium finish and packing.
Why pick the REL Acoustics T/9x: Flagship of the Serie T/x line pairing a front-firing 10-inch FibreAlloy driver with a down-firing 10-inch passive radiator powered by a 300W Class A/B amplifier. Watch for: Passive radiator configuration requires careful boundary positioning away from corners to avoid room mode excitation.
Buy the REL Acoustics T/9x. Both are rated the same for sound quality, and it costs $101 less than the Arendal 1723 Subwoofer 1S.
About the ratings: the REL Acoustics T/9x’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 3.7 to 4.1, so this verdict could change once it is measured.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| Arendal 1723 Subwoofer 1S | REL Acoustics T/9x | |
|---|---|---|
| Price | $1,650 | $1,549.00 |
| Ranked | #35 of 212 in Medium Home Subwoofers (30-75 lbs) | #47 of 212 in Medium Home Subwoofers (30-75 lbs) Estimated |
| Enclosure | sealed | passive radiator |
| Output SPL at 12.5 Hz | 86.5 dB | - |
| Output SPL at 15 Hz | 93.0 dB | - |
| Output SPL at 20 Hz | 98.5 dB | - |
| Output SPL at 25 Hz | 104.1 dB | - |
| Output SPL at 31.5 Hz | 108.5 dB | - |
| Output SPL at 40 Hz | 113.2 dB | - |
| Output SPL at 50 Hz | 117.0 dB | - |
| Output SPL at 63 Hz | 118.5 dB | - |
| Output SPL at 80 Hz | 118.6 dB | - |
| Output SPL at 100 Hz | 118.5 dB | - |
| Output SPL at 125 Hz | 118.1 dB | - |
| CEA-2010-A Average (40-80Hz) | 116.8 dB | - |
| Dimensions | 18.9”H x 13.2”W x 17.7”D (479.8 x 334.8 x 449.8 mm) | 13.4”H x 15.2”W x 15.5”D (340 x 387 x 393 mm) |
| Weight | 54 lbs (24.5 kg) | 45.4 lbs (20.6 kg) |
| Warranty | 10/5 | 3 |
| Cabinet Color | black, white | - |
| Country | Norway | United Kingdom |
| Measurement Source | Audioholics | - |
| Frequency Response | 19-200Hz, ±3dB | 27Hz at -6dB (manufacturer specified) |
| Amplifier Power | 800W RMS | 300W RMS (Class A/B) |
| Drivers | 13.8” (351mm) driver | 10” (254mm) active FibreAlloy driver, 10” (254mm) down-firing passive radiator |
| Inputs | XLR (balanced), RCA | - |
| XLR Input | Yes | - |
| RCA Input | Yes | - |
| TRS Input | No | - |
| Optical Input | No | - |
| Coaxial Input | No | - |
| USB Input | No | - |
| HDMI Input | No | - |
| AES Input | No | - |
| Aux Input | No | - |
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How Arendal 1723 Subwoofer 1S compares with other leading options:
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Prices on this page were last checked October 11, 2026 at 4:59 PM 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
Arendal 1723 Subwoofer 1S: $1,650 Arendal Sound eBay
Same family: the Arendal 1723 Subwoofer 1V (larger subwoofer, rated 3.9/5), the Arendal 1723 Subwoofer 2S (larger subwoofer, rated 4.1/5) and the Arendal 1723 Subwoofer 2V (larger subwoofer, rated 4.2/5).
Pros: Premium finish and packing. Tight and precise bass with suppleness and dynamics at higher price point. 7-band parametric EQ for room correction. App control (iOS/Android). Flexible driver configuration.
Full Arendal 1723 Subwoofer 1S review and specifications →
| Released | Sep 2020 (6 years ago) |
|---|---|
| AES Input | No |
| Amplifier Power | 800W RMS |
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 116.8 dB |
| Cabinet Color | black, white |
| Coaxial Input | No |
| Country | Norway |
| Dimensions | 18.9”H x 13.2”W x 17.7”D (479.8 x 334.8 x 449.8 mm) |
| Drivers | 13.8” (351mm) driver |
| Enclosure | sealed |
| Frequency Response | 19-200Hz, ±3dB |
| HDMI Input | No |
| Inputs | XLR (balanced), RCA |
| Measurement Source | Audioholics |
| Optical Input | No |
| Output SPL at 12.5 Hz | 86.5 dB |
| Output SPL at 15 Hz | 93.0 dB |
| Output SPL at 20 Hz | 98.5 dB |
| Output SPL at 25 Hz | 104.1 dB |
| Output SPL at 31.5 Hz | 108.5 dB |
| Output SPL at 40 Hz | 113.2 dB |
| Output SPL at 50 Hz | 117.0 dB |
| Output SPL at 63 Hz | 118.5 dB |
| Output SPL at 80 Hz | 118.6 dB |
| Output SPL at 100 Hz | 118.5 dB |
| Output SPL at 125 Hz | 118.1 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 10/5 |
| Weight | 54 lbs (24.5 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
REL Acoustics T/9x: $1,549.00 Estimated Amazon eBay
Same family: the REL Acoustics T/5x (smaller subwoofer, ranked lower, estimated 3.5/5) and the REL Acoustics T/7x (smaller subwoofer, ranked lower, estimated 3.6/5). See every REL T Series generation.
Pros: Flagship of the Serie T/x line pairing a front-firing 10-inch FibreAlloy driver with a down-firing 10-inch passive radiator powered by a 300W Class A/B amplifier. Extends reach down to 27Hz at -6dB with fast musical transient speed.
Cons: Passive radiator configuration requires careful boundary positioning away from corners to avoid room mode excitation. Commands a premium price without onboard DSP or smartphone app calibration.
Full REL Acoustics T/9x review and specifications →
| Released | Apr 2021 (5 years ago) |
|---|---|
| Amplifier Power | 300W RMS (Class A/B) |
| Country | United Kingdom |
| Dimensions | 13.4”H x 15.2”W x 15.5”D (340 x 387 x 393 mm) |
| Drivers | 10” (254mm) active FibreAlloy driver, 10” (254mm) down-firing passive radiator |
| Enclosure | passive radiator |
| Frequency Response | 27Hz at -6dB (manufacturer specified) |
| Warranty | 3 |
| Weight | 45.4 lbs (20.6 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons