The GLADEN ATM 4 is a mono active terminal module designed to be integrated directly into subwoofer cabinets, effectively turning a passive box into an active one. It delivers 200 Watts RMS at 4 Ohms, making it compatible with subwoofer chassis of the same impedance. To ensure only deep bass reaches the driver, the unit features a low pass filter adjustable between 50 and 120 Hz with a slope of 12 dB/octave, operating within a total frequency range of 25 to 220 Hz. Its round design with a diameter of 78 mm allows it to replace standard terminals easily. On the faceplate, you will find controls for level and filter adjustments, along with a selector switch to choose between high-level and line-level inputs. A small LED status indicator lets you know when the system is active, which happens automatically thanks to the built-in automatic turn-on feature. For those who prefer not to reach into the trunk for settings, this module supports the optional RTC2 remote controller. Power and signals are handled via a Molex Mini Fit JR interface, ensuring secure connections. This CE-certified amplifier is an ideal choice for car audio enthusiasts who want to save space by eliminating a separate external amplifier while maintaining precise control over their subwoofer's output.