Visaton ALTO III C, Speaker Kit (Pair)
Product photo · Enlarge image
Product photo
Frequency and impedance response
Exploded cabinet drawing
Cabinet construction drawing
Crossover diagram
Product photographs and manufacturer drawings. Images are not to scale.
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The ALTO III C is a VISATON three-way passive loudspeaker design built around DT 94 - 8 Ω, W 100 S - 4 Ω, W 170 S - 8 Ω. The manufacturer specifies a bass-reflex arrangement and 44 l + 3 l net volume, a 35–22000 Hz frequency range and nominal impedance of 4 Ω. This kit is sold as a pair, while the manufacturer's component and cabinet lists are stated for one cabinet.
Typical applications
- DIY loudspeaker construction from the published VISATON cabinet plan
- Stereo hi-fi loudspeaker construction
- Restoration of the documented VISATON design
- Custom cabinetry that preserves the published internal volume and layout
Full specifications
| Rated power | 100 W |
|---|---|
| Maximum power | 180 W |
| Nominal impedance | 4 Ω |
| Frequency response (−10 dB) | 35–22000 Hz |
| Mean sound pressure level | 86 dB (1 W/1 m) |
| Crossover frequency | 450/3500 Hz |
| Cabinet principle | Bass-reflex |
| Net volume | 44 l + 3 l |
| Outside height | 1000 mm |
| Outside width | 230 mm |
| Outside depth | 300 mm |
| Manufacturer component-list basis | 1 cabinet / box |
| Kit component — Tweeter | DT 94 - 8 Ω · 1 pc. |
| Kit component — Midrange driver | W 100 S - 4 Ω · 1 pc. |
| Kit component — Woofer | W 170 S - 8 Ω · 2 pcs. |
| Kit component — Crossover | Crossover Alto III c · 1 pc. |
| Kit component — Bass reflex tube | (volle Länge) BR 15.34 · 1 pc. |
| Kit component — Terminal | ST 77 · 1 St. |
| Kit component — Damping material | Polyester wool · 4 bags |
| Kit component — Screws (round head) | 3.5 x 19 mm · 3 pcs. |
| Kit component — Screws (countersunk) | 3.5 x 25 mm · 19 pcs. |
| Kit component — Cable | 2 x 1.5 mm² · 3.5 m |
Dimensions and drawings

Exploded cabinet drawing · Open original image

Cabinet construction drawing · Open original image

Crossover diagram · Open original image
Installation and cabinet guidance
Build each cabinet from the linked manufacturer construction drawing and cabinet parts list. The documented outside size is 1000 mm × 230 mm × 300 mm (H × W × D); the specified cabinet principle is Bass-reflex with 44 l + 3 l net volume. Preserve the published driver, port, bracing and crossover positions.
The manufacturer states its component and cabinet parts lists for one box. Sold as: Pair. The kit excludes the cabinet; confirm component quantities against the ordered sales unit before starting the build.