Arendal Sound 1723 Monitor S THX Review: Ranked #55 of 134

Last updated: September 30, 2026

The Arendal Sound 1723 Monitor S THX ranks #55 out of 134 total Large Size Bookshelf Speakers for sound quality. See all Passive Home rankings for every top pick.

Brand: Arendal

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#55 Arendal Sound 1723 Monitor S THX: $2,200 per pair Arendal Sound eBay

Pros: A THX-certified two-way with twin 6.5-inch woofers around a waveguided 28mm tweeter, and port plugs that let you run it sealed, with one vent or two to suit the room. Erin’s Audio Corner measured a listening window within a 2.4dB span from 300Hz to 5kHz, a smooth listening window (0.77) and predicted in-room response (0.71), and a preference score of 5.07 that rises to 7.08 with an ideal subwoofer. Sensitivity is a healthy 88.7dB. Measured bass extension of 76.9Hz (-3dB).

Cons: In the configuration measured, the bass response starts to fall early, about 77Hz at -3dB, though it keeps going to about 50Hz at -6dB and 33Hz at -10dB, so it benefits from a subwoofer or placement near a wall. It is large and heavy for a stand-mount at 56.9cm tall and 18.7kg, presents a 4-ohm load, and is sold direct by Arendal.

How it compares: Just above it: ELAC Uni-Fi Reference UBR62 - $1001 cheaper, 5.7Hz lower bass extension (-3dB). Just below it: Paradigm Founder 40B - $1000 cheaper, 0.3Hz higher bass extension (-3dB).

Bass Extension (-10dB)32.9Hz (measured, Erin’s Audio Corner)
Bass Extension (-3dB)76.9Hz (measured, Erin’s Audio Corner)
CertificationTHX Ultra
DIY KitNo
Dimensions22.4”H x 9.6”W x 12.6”D (569 x 245 x 320 mm)
DriversTwo 6.5-inch woofers; 28mm waveguided tweeter
Frequency Response46Hz-20kHz ±3dB with two vents, 66Hz sealed (manufacturer specified)
Impedance4 ohms nominal
Sensitivity88.7dB (manufacturer specified, 2.83V/1m)
Spinorama Preference Score5.07
Spinorama Preference Score with Perfect Sub7.08
Weight41.2 lbs (18.7 kg) each
Woofer Cabinetsealed or ported (port plugs included)

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