1723 Tower S THX

Downscaled version of the 1723 Tower

The 1723 Tower S is a downscaled version of the 1723 Tower. It features a completely custom built 2.5-way lineup of mid-bass drivers and a waveguide tweeter you cannot find anywhere else. The materials, quality, drivers and crossover components are just the same as you would expect from any of the 1723 speakers. The only difference is smaller enclosure with 6.5” drivers in 1723 Tower S, instead of the 8” in the 1723 Tower. The sheer performance, level of detail and dynamics delivered by Tower S is unheard of in this price category. Expect the Tower S to be compared to much higher priced speakers on the market.

1723 Tower S THX


Massive bass. Massive ports. Tune your bass to your liking. Two (2) ports make three (3) different variations including sealed for optimized dynamics.

1723 Tower S THX


Rhodium-plated copper terminals. The aluminum backplate is precisely recessed for a perfect fit in the HDF cabinet.

1723 Tower S THX

Enclosure tilt

Enclosure tilt at 2.5 degrees for the best soundstage in the listening position. It looks cool too.

1723 Tower S THX

Mix and match

With a perfect soundstage from all 1723 speakers. Same tweeter, woofers, voicing and premium feel.

Professional reviews

1723 S Towers are a superb choice. These can play very loud without strain and prove that the THX badging is more than just a trademarked logo.


What nevertheless impresses is the calm, relaxed and undaunted way it plays music, and that it still manages to render each and every hit of the drums and every single blow with palms and fingers.


Arendal Sound has managed to shrink the loudspeaker a lot without losing dynamics, sound signature and the great soundstage. An impressive loudspeaker!


THX Certified

All our 1723 speakers are Certified by the very strict testing protocols of THX Ultra where each speaker must pass a set of 400 measurements. The THX Certification does not mean it is a dedicated home speaker, but rather a guarantee of tight consistency within well-established acoustic parameters. THX Certification is as much about music, as for movies.

The engineers at THX Labs utilize a proprietary scientific testing methodology to ensure the highest audio fidelity possible. All 1723 speakers passed the THX Ultra Certification without any change to the products, meaning our standards already exceed THX Ultra level out of the box!

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Technical specifications

4 x 6,5″
Sealed / vented
High Density Fiberboard (HDF)
100Hz / 1500Hz
Sealed 49-20kHz (+/-3dB)
1 vent 39-20kHz (+/-3dB)
2 vents 35-20KHz (+/-3dB)
2 x 2.6″
4-ohm nominal
Grilles. Manual. Spikes Kit. Rubber feet. Port plugs.
98.0H x 24.5W x 32D cm
99.2H x 24.5W x 32D cm
102.1H x 31.5W x 32D cm
31.3 kg (including spikes kit)
50 hours
Up to 400W RMS @ 4ohm

Frequency response

Frequency response does not reflect maximum output but shows its true response in a anechoic chamber. Typically you will see an elevated response in the bass response below 40Hz in room due to room gain, which can add around 6dB pr. octave under 40Hz depending on the size of your room.

Polar response

The charts display frequency response measured at different angles, the sum of which is referred to as power response. Much scientific research has been undertaken on this subject and a linear power response has proven a substantial impact on the overall sound, because the frequency response is more even in all directions. This means an Arendal Sound speaker will be more tolerant of differences in room shape, size, construction and materials.

Impedance response

The impedance charts are electrical measurements of the loudspeaker’s resistance vs frequency.

Product compliance

CE marking is an administrative marking with which the manufacturer or importer affirms its conformity with European health, safety, and environmental protection standards for products sold within the European Economic Area (EEA).
RoHS is an abbreviation for “Restriction of (the use of certain) Hazardous Substances in electrical and electronic Equipment”. This directive restricts the use of ten hazardous materials in the manufacture of various types of electronic and electrical equipment. It is closely linked with the Waste Electrical and Electronic Equipment Directive (WEEE) 2002/96/EC which sets collection, recycling and recovery targets for electrical goods and is part of a legislative initiative to solve the problem of huge amounts of toxic electronic waste.