Visaton TOPAS, 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.
Quantity discounts
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The TOPAS is a VISATON two-way passive loudspeaker design built around MHT 12 - 8 Ω, TI 100 - 8 Ω. The manufacturer specifies a transmission-line / bass-reflex arrangement and 20 l net volume, a 35–40000 Hz frequency range and nominal impedance of 8 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 | 40 W |
|---|---|
| Maximum power | 60 W |
| Nominal impedance | 8 Ω |
| Frequency response (−10 dB) | 35–40000 Hz |
| Mean sound pressure level | 80 dB (1 W/1 m) |
| Crossover frequency | 3500 Hz |
| Cabinet principle | Transmission-line / bass-reflex |
| Net volume | 20 l |
| Outside height | 900 mm |
| Outside width | 162 mm |
| Outside depth | 225 mm |
| Manufacturer component-list basis | 1 cabinet / box |
| Kit component — Tweeter | MHT 12 - 8 Ω · 1 St. |
| Kit component — Woofer | TI 100 - 8 Ω · 1 pc. |
| Kit component — Crossover | Crossover Topas · 1 pc. |
| Kit component — Terminal | High-End-Terminal · 1 pc. |
| Kit component — Damping material | Lamb's wool · 1 bag |
| Kit component — Wood screws | 3.5 x 19 mm · 8 pcs. |
| Kit component — Cable | 2 x 1.5 mm² · 2,5 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 900 mm × 162 mm × 225 mm (H × W × D); the specified cabinet principle is Transmission-line / bass-reflex with 20 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.
Cabinet options and assembly support
For cabinet options and assembly support for this VISATON kit, see our longstanding UK partner, Wilmslow Audio. Please check their current services and availability directly.