AP-W81AC 4x8 LOUD AS HELL planka slope v4

AP-W81AC 4x8 LOUD AS HELL SPL-board Slope V4 – Deep Arnold attack with high-end treble from AT-37 Sport

The AP-W81AC 4x8 LOUD AS HELL SPL-board Slope V4 is built for those who want massive depth, brutal midrange power, and a treble that blends SPL strength with musical finesse. With four Apocalypse AP-W81AC 8" midbass drivers and two Deaf Bonce AT-37 Sport horn tweeters, this package delivers punch, clarity, and uncompromising sound control.

The AP-W81AC midbass drivers are engineered to push deeper bass while maintaining high sensitivity, thanks to a lowered FS and 300W RMS power handling. Operating from 150 Hz to 8000 Hz, they produce sound pressure that’s not just heard — it’s physically felt. Perfect for those who demand both power and precision from their midrange.

The treble is handled by two Deaf Bonce AT-37 Sport horn tweeters — a high-performance SPL tweeter with 60W RMS, a 1.5" voice coil, polycarbonate diaphragm, and 108.8 dB sensitivity. The result is clarity, force, and a soaring high end that perfectly complements the forceful midbass.

The system uses DB 2-way filters v2, with crossover at 4000 Hz (12 dB/oct) and three selectable tweeter attenuation levels (0, -3, -6 dB), allowing you to fine-tune the soundstage with ease.

Everything is mounted in a rugged LOUD AS HELL 4x8" SPL-board Slope — made from MDF, with an angled baffle, embroidered LOUD AS HELL logo, and side-mounted terminal for straightforward connection.

The AP-W81AC 4x8 LOUD AS HELL SPL-board Slope V4 is the choice for those who want deep power and top-end clarity — a plank that makes zero compromises.

NOTE! This package is sold as a DIY kit.
The tweeter cutout in the enclosure may be smaller than the supplied tweeters. This is to ensure compatibility with most tweeters in the included universal box. You may need to use a file or similar tool to widen the hole for a perfect fit.