EarthquakeSound SLAPS-M10 Tunable Passive Radiators

SLAPS-M10

SLAPS have a dual structure of identical opposites, ie. that there is an introvert and an extrovert edge suspension and no spider. This gives identical properties in both the negative and positive pressure domain. SLAPS thus behaves  pistonically and accurately, they do not have the "hesitation" traditional passive devices seems  to have when you observe them in operation.

SLAPS opens up for new subwoofer designs, where even very small enclosures can be tuned to low frequencies . The low weight allows great flexibility in terms of weight attachment. SLAPS can be custom tuned for optimum performance in a wide range of enclosure sizes and active device configurations.

Damping is very important in a passive device because it does not have a magnet motor system to control it. It is essential that the passive device constantly is "leaning" up against the pneumatic environment in the cabinet. If the device's compliance is too weak the result ss over-shoot and over-ring. This means, for example a transient in the music causes a rapid pressure ratio change in the cabinet and control  over the device can be lost - making it move more than it should. The same thing can happen to a normal woofer. unit if the suspension + motor system is not built correctly. The design of the edge suspension itself is important. If not correctly designed it  may  implode ie. be sucked backwards if the pressure in the enclosure is too strong. A full implosion is rare, but in most  typical slave/passive/drone  designs some "dimples" in edge suspension can be visible already at medium load. A normal passive device only has a one way edge suspension so the dimples will only occur when negative pressure is present - = asymmetrical artifacts = distortion.

SLAPS dual structure based on the principle of  - identical opposites - eliminate the circumstances that would allow asymmetric nonlinearities  because the device is subjected to identical loads. You could argue that it does not fundamentally resolve  dimples at high loads, as they will still occur, but they are offset as they now occur similar under both positive and negative pressure.

SLAPS enables the transfer of high amplifier power into low frequency output. Since the device does not have to fight against increasing pneumatic pressure in a closed cabinet or over-excurt  close to a port tuning frequency. SLAP has no annoying port noise and enables deep bass from a compact volume. SLAPS promotes the dynamics of a small system in which a closed enclosure design has difficulties. In a closed cabinet design the pneumatic loading of the woofer increases  as a function of its travel, this causes compression. SLAPS technology possesses none of these limitations.
SLAPS allows tuning below 10hz  making any worries about tuning frequency superfluous.

Sold and Priced per piece.

Features

• Coupled with almost all woofers, SLAPS increases output without added amplifier power or enclosure volume
• Suitable for high output needs where space is limited
• User-tunable adjustments can be set to match a range of vehicle requirements and musical preferences.

Specifications

• Model nr.: SLAPS-10M

• Installs just like a subwoofer
• Slim-mount design is only 3-inches deep
• No increase over existing sealed subwoofer enclosure sizes
• Easy tuning for quick adjustments

Dimensions:

• Overall Diameter: 261 mm
• Cutout Diameter: 236 mm
• Mounting Depth: 50 mm
• Hex Nut Size: US 5/16 (M8)
• Mass ID: 8 mm
• Max Mass OD: 74 mm
  

TS Parameters*:

• Fs: 29Hz (Free Air Resonance)
• Vas: 1.5 cu.ft.
• Qms: 7.00
• Cms: 0.4275 mm / Newton (Mechanical Compliance)
• Mms: 100g (Total moving mass it includes the air load)
• Sd: 301 sq.cm.
• Xmax: 4 in. / 10.2cm

*measured with only the bolts installed and without the mass

SLAPS-M10 Manual

Subwoofer Design with SLAPS Passive Radiator Manual (ENG)