Manufacturer reference designs and well-known community designs. Each plan shows which data are documented, where they come from – and which are missing.
A compact bass reflex top with a 12-inch coaxial driver and the manufacturer’s passive crossover. The document includes measurements and polar plots.
A bandpass subwoofer for a 21-inch driver. According to 18 Sound a “Double Reflex Band-Pass” with large port cross-sections, internal bracing and overdamped tuning.
A bass reflex top with a 15-inch woofer and a 1.4-inch compression driver on a 60° × 40° horn. 18 Sound supplies the passive crossover, measurements and polar plots.
A folded bass horn for an 18-inch driver. 18 Sound names three suitable drivers and supplies complete controller settings for two of them.
A deliberately compact bass reflex subwoofer for a 15-inch neodymium driver. The Application Note includes measurements, a complete controller preset and limiter settings.
A 2-way top with a 12-inch woofer and a 1.4-inch driver on an 80° × 60° horn, made from 15 mm birch plywood.
No performance data published
A wedge monitor with a 12-inch coaxial driver and passive crossover. According to the schematic, incandescent lamps protect the tweeter.
No performance data published
An 18-inch bass reflex subwoofer made from 18 mm birch plywood. The document contains drawings and measured curves, but hardly any text.
No performance data published
An 18-inch bass horn made from 18 mm board. The document consists of drawings; no specifications are given in the text.
No performance data published
A vented wedge monitor with a 12-inch coaxial driver. Celestion supplies a drawing, passive crossover and measured frequency and dispersion data with measurement conditions.
A compact trapezoidal top with a 12-inch woofer and a compression driver on a horn. Eminence supplies crossover values, design targets and simulated and measured curves.
Two 18-inch bass reflex chambers in one enclosure, acoustically separated. Eminence supplies design targets, simulated and measured curves and step-by-step instructions.
A bass reflex subwoofer with two ports for an 18-inch driver. Eminence supplies design targets, simulated and measured curves and detailed build instructions.
An 18-inch bass reflex subwoofer as a reference design by the driver manufacturer. The drawings are very detailed, but the document does not explicitly state the volume and tuning frequency.
A 12-inch hybrid subwoofer from Jobst-Audio’s beginner series. The official plan page is currently offline, and the terms of use only permit linking.
No performance data published
A bass reflex/horn hybrid for an inexpensive 18-inch driver from the Hifi-Forum. All performance data are the designer’s simulations.
A bass reflex subwoofer for an 18-inch neodymium driver with a divided port opening at the bottom of the front. The plan supplies part drawings and the driver datasheet.
No performance data published
A bass reflex top with a 15-inch woofer and a compression driver on a 90° × 60° horn, 77 litres according to the title. The plan includes a passive crossover.
No performance data published
An 18-inch bass horn with three drivers named by the manufacturer. The datasheets for all three options are in the plan.
No performance data published
A compact 12-inch subwoofer for beginners. The free PDF includes a datasheet, measurements, a DSP preset and parts lists for two panel thicknesses.
A compact bandpass for an 18-inch driver. The designer names six suitable drivers and matching tube lengths for each variant.
A folded bass horn for an 18-inch driver with high efficiency. Four drawings contain dimensions, angles, mitres and panel lengths.
A folded bass horn for an 18-inch driver with an emphasis on clean sound. The two views give different heights.
A bandpass for an 18-inch driver with a crossover at 80 Hz. The designer gives the frequency range, sensitivity and five suitable drivers.
A large 3-way loudspeaker with Eminence drivers for DJ monitoring, sidefill or full-range PA. Crossover frequencies and level are given in the drawing.
A large bass reflex enclosure for two 18-inch drivers. The designer names three suitable drivers, the −3 dB point and crossover frequencies depending on music style.
A compact 15-inch horn for the 52 to 180 Hz range. It does not replace a subwoofer and according to the designer is intended for large stacks.
A mid-high top for use above bass cabinets. The drawing gives the frequency range, crossover frequencies, coverage angles and suitable drivers.
A large mid-high top with two midrange flares around a high-frequency horn. The drawings name drivers and coverage angles, but no performance data.
An 18-inch bass for a specified driver. The title block gives cut-off frequencies, sensitivity, maximum SPL and power handling.
A trapezoidal top with two 10-inch woofers and one compression driver. The drawings specify all components, but give no performance data.
A trapezoidal top with two 12-inch woofers and one compression driver. The drawings specify all components, but give no performance data.
A trapezoidal top with a 15-inch woofer and two specified high-frequency variants including crossovers. Volume, tuning and f3 are given in the title block.
A wedge top with a 15-inch woofer, a 1-inch compression driver and a specified crossover. Volume, tuning and f3 are given in the title block.
A scoop enclosure for an 18-inch driver. The drawings give the driver, horn length, cut-off frequencies and material; level and performance data are missing.
The 21-inch version of the Super Scooper. The drawings give the driver, horn length, cut-off frequencies and material.
No build plan matches these filters.