AP-M81AC 4x8 LOUD AS HELL planka slope v4

AP-M81AC 4x8 LOUD AS HELL SPL-board Slope V4 – Brutal Arnold standard with refined top-end from AT-37 Sport

The AP-M81AC 4x8 LOUD AS HELL SPL-board Slope V4 is built for those who want classic Arnold midrange power paired with an advanced, powerful tweeter that elevates the soundstage to the top. Featuring four Apocalypse AP-M81AC 8" midrange drivers and two Deaf Bonce AT-37 Sport horn tweeters, this system combines massive raw force with musical top-end clarity.

The AP-M81AC midbass drivers are a true icon of the Arnold series – with 300W RMS, high sensitivity, and a recommended frequency range from 150 Hz to 8000 Hz. They deliver maximum sound pressure, forceful punch, and clear midrange presence – ideal for serious SPL systems and demo builds where nothing can be left out.

The top end is refined with two Deaf Bonce AT-37 Sport horn tweeters – equipped with 60W RMS, a polycarbonate diaphragm, 1.5" voice coil, and 108.8 dB sensitivity. They provide a clean, powerful, and dynamic treble that matches the midbass attack perfectly without sounding harsh or fatiguing.

The system is powered by DB 2-way filters 10k, featuring a crossover point at 10 000 Hz (12 dB/oct) and three selectable tweeter attenuation levels (0, -3, -6 dB), allowing you to tailor the sound profile to your installation and preferences.

Everything is mounted in a LOUD AS HELL 4x8" SPL-board Slope – a sturdy MDF construction angled for better sound dispersion, with embroidered LOUD AS HELL logo and side-mounted terminal for hassle-free installation.

The AP-M81AC 4x8 LOUD AS HELL SPL-board Slope V4 is your go-to system if you want pure Arnold midrange brutality combined with a treble response that keeps up even at extreme volume levels.

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.