Overview

The Classic Pro CS104 is a small passive PA box with a 4” woofer and 1” HF driver. Manufacturer specs list 100Hz–20kHz bandwidth, 109dB max SPL, 90°×90° coverage, 80W program power handling, and Speakon plus barrier strip terminals. An L-bracket is included for wall mounting. The enclosure measures 14.4×21.4×14.6 cm and weighs 2.5 kg [1]. Typical street price is about 61 USD equivalent (JP market ~8,980円) [1][5].

Scientific Validity

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Manufacturer numbers indicate 100Hz–20kHz, THD<3%, and 109dB max SPL [1]. Below 100Hz output is limited, and the quoted THD figure is relatively high for high-fidelity listening. For speech/BGM in small venues, the on-axis coverage and output are adequate. Due to the lack of comprehensive third-party measurements, we keep the score conservative at 0.3.

Technology Level

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This is a conventional 2-way passive design with standard connectivity and no publicly disclosed unique waveguides, materials, or patents beyond typical installation hardware [1]. Practical, but not technically novel.

Cost-Performance

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Market price used: 61 USD (JP street ≈8,980円) [1][5]. The cheapest equivalent-or-better option we could confirm is Behringer SAT1004 at 59 USD in the US market, a passive wall-mount 2-way with comparable installation use, 110Hz–20kHz, and included mounting bracket [2][4].
Computation: 59 USD ÷ 61 USD = 0.967 → rounded to one decimal = 1.0.

Reliability & Support

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No public MTBF/RMA data, but the retailer advertises a 3-year warranty program on the site, which is above the minimum norm for this class in JP retail [1]. Firmware is not applicable to passive speakers.

Rationality of Design Philosophy

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The product prioritizes compact footprint, wide coverage, and simple installation—rational for paging/BGM. However, the design does not aim for low distortion/high extension required for high-end critical listening, so the philosophy is utilitarian rather than fidelity-maximizing [1].

Advice

Choose CS104 when you need discreet wall-mount speakers for speech/BGM with simple passive wiring and broad coverage. For fuller low end, add a subwoofer. If minimizing cost with equivalent installation-grade functionality is your priority, consider Behringer SAT1004 (59 USD) [2][4]. For near-field production tasks, an active monitor like Edifier MR4 offers flatter response (60Hz–20kHz) and very low distortion (≤0.2%) at 169.99 USD/pair [3].

References

[1] Sound House, “CLASSIC PRO CS104 PA Speaker (specs incl. 100Hz–20kHz, 109dB, 90°×90°, THD<3%, bracket)”, https://www.soundhouse.co.jp/products/detail/item/165794/ (accessed 2025-08-19)
[2] Sweetwater, “Behringer SAT 1004 4.5-inch Passive Loudspeaker (price/specs)”, https://www.sweetwater.com/store/detail/SAT1004–behringer-sat-1004-4.5-inch-passive-loudspeaker (accessed 2025-08-19)
[3] Edifier USA, “MR4 Powered Studio Monitor (price, FR 60Hz–20kHz, Distortion ≤0.2%, 2-year warranty)”, https://edifier-online.com/products/edifier-mr4-p (accessed 2025-08-19)
[4] Thomann US, “Behringer SAT 1004 (FR 110Hz–20kHz, max level 104dB, dimensions/accessories)”, https://www.thomannmusic.com/behringer_sat_1004.htm (accessed 2025-08-19)
[5] Sound House listing, “CS104 street price (8,980円, tax-in)”, https://www.soundhouse.co.jp/search/index?search_all=%E3%82%AF%E3%83%A9%E3%82%B7%E3%83%83%E3%82%AF%E3%83%97%E3%83%AD%20CS104&i_type=a (accessed 2025-08-19)

(2025.8.20)