Super Scooper 18
18″ scoop by Rog Mogale for the PD 1850 – horn length 2.22 m, 38 Hz lower limit, 30 Hz in groups of four according to the drawing.
Primary source checked; some values are missing from the source or still open.
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Specifications
Link to section “Specifications”Every value with its provenance. If a value is missing from the source, it reads “not available”.
- Drivers
- 1 × Precision Devices PD 1850 Designer
- Enclosure type
- Scoop
- Low-frequency extension
- 38 Hz cut-off frequency (“Cutoff”), one enclosure; in a stack of four 30 Hz Designer
- Sensitivity
- not available
- Max. SPL
- not available
- Power handling
- not available
- Impedance
- not available
- Dimensions (H × W × D)
- 1,220 × 636 × 760 mm from drawing, Front view Designer
- Volume
- not available
- Tuning frequency
- not available
- Weight
- not available
- Recommended high-pass
- approx. 30 Hz Designer
External dimensions from the front and side views; driver cut-out Ø 416 mm.
Description
Link to section “Description”In brief
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 Super Scooper 18 is a scoop enclosure for an 18-inch driver by Rog Mogale, published on Speakerplans.com. The drawings call it “Mogale Super Scooper 18″ rear loaded horn” and specify the driver: a Precision Devices PD 1850.
What the source states
Link to section “What the source states”- horn length 2.22 m, lower cut-off frequency 38 Hz
- in groups of four, 30 Hz lower cut-off frequency
- material: 18 mm birch plywood with 13 plies
- a high-pass at around 30 Hz is mandatory, because the driver is barely loaded below that
The source does not state sensitivity, maximum SPL or power handling.
Building the curve
Link to section “Building the curve”The curve is made from six glued and nailed layers of 3 mm plywood, bent over battens on the side walls. It works better over four sawn-out 18 mm formers, evenly distributed across the width; the two outer ones sit directly against the side walls. Notably, the designer himself writes that he does not actually like scoop enclosures. If it has to be a scoop, he says this one works better than the others.
Other drivers from the forum
Link to section “Other drivers from the forum”In a forum thread from 2010, users name further 18-inch drivers that they use or recommend in the Super Scooper. One user there also gives rules of thumb (BL above 30 T·m, Qts below 0.25, Vas approx. 180–250 L, Xmax preferably above ±10 mm). These are one individual’s empirical values, not information from the designer.
Do not swap by size
An 18-inch driver fits mechanically into many enclosures, but not acoustically. Whether a driver other than the PD 1850 works in the Super Scooper depends on its Thiele-Small parameters, not on its diameter.
Drivers
Link to section “Drivers”-
Original driver
1 × Precision Devices PD 1850
Woofer
Mentioned in the community – not verified
These drivers are named by forum users. Whether they work in the enclosure has not been confirmed by simulation or measurement.
- Void V18-1000 – Suggested by two users – as a cheaper alternative to the PD 1850. (Tier C · community)
- Fane 18XB – One user says he runs it in his Super Scoopers. (Tier C · community)
Enclosure
Link to section “Enclosure”- Enclosure type
- Scoop · How does it work?
- Shape
- Rectangular box
- Ports
- not stated
- Material
-
- Birch plywood, 18 mm – specified: Birch plywood, 13 plies (“13 Laminate 18 mm Birch Ply”)
- Plywood (wood type not stated), 3 mm – specified: Curved section: six layers, glued and nailed (18 mm in total)
- Plywood (wood type not stated), 18 mm – alternative: Better: four cut-out 18 mm formers as a mould for the curved section
Build plan
Link to section “Build plan”We link to the original plan and do not host other people’s drawings.
-
Open original document
Super Scooper 18 – Plan-Seite mit Zeichnungen auf Speakerplans.com (englisch)
Official source · accessed on 13 September 2026
Rights of use not stated – we only link
Plan access: Free
Crossover & controller
Link to section “Crossover & controller”- Recommended high-pass
- approx. 30 HzSource: “You must use a high pass filter set to around 30 Hz with scoop bins”
Pros and cons
Link to section “Pros and cons”Pros
- Driver, cut-off frequencies and material given
- Build instructions for the curved section
Cons
- No sensitivity, no maximum SPL, no power handling
- Designed for one driver only; alternatives only from the forum
- High-pass at around 30 Hz mandatory
Safety
The enclosure is heavy. Carry it with two people and use handles and castors.
Sources
Link to section “Sources”-
Tier A · primary source
Speakerplans.com – 18" Super Scooper
Rog Mogale · Speakerplans.com · accessed on 13 September 2026
Plan page with build text and four drawings (“Mogale Super Scooper 18″ rear loaded horn, for 1 x PD1850”). No year and no licence information.
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Tier C · community
Speakerplans.com Forums · 31 March 2010 (Date of the forum post) · accessed on 13 September 2026
Forum thread with driver recommendations from individual users. Page 1 was evaluated.
-
Tier B · secondary source
Speakerplans.com – Speaker plans (overview)
Rog Mogale · Speakerplans.com · accessed on 13 September 2026
Overview with Horn Plans, Sub Plans and Mid Top Plans. The plans are embedded as images (drawings) on the individual pages.
Usage rights of the plan: Rights of use not stated – we only link. Added on 13 September 2026, last updated on 14 September 2026.