Match UP 1FX Amp Mono 1 Channel Subwoofer Amplifier Class D 900w RMS at 1 Ohms

The Match UP 1FX is a compact mono Class D subwoofer amplifier delivering 900W RMS at 1 ohm (up to 1000W RMS), from the Match UP upgrade amplifier range. It features a high-power stereo highlevel input with ADEP.3, an integrated active crossover, and a Start-Stop capable power supply — making it well suited to factory sound system upgrades.

Key specifications

• Channels: 1 (mono), Class D
• RMS power: 1 x 350W at 4 ohms, 1 x 600W at 2 ohms, 1 x 900W at 1 ohm (continuous 1 ohm power achieved only with music signal)
• Max output power: up to 1000W RMS at 1 ohm
• Inputs: 1 x RCA, 2 x highlevel speaker input (up to 32V), remote in, remote control input
• Low-pass: 50–250Hz adjustable, 12dB (can be turned off); subsonic 15Hz (can be turned off)
• Operating voltage: 10.5–18V (max. 5 sec. down to 6V), Start-Stop capable
• Signal-to-noise ratio: 108dB (A-weighted); THD 0.002%
• Fuse: 2 x 30A LP-Mini (APS)
• Dimensions (H x W x D): 46 x 130 x 153 mm

Power, precision and control

This highly efficient Class D amplifier delivers up to 1000W in an exceptionally compact enclosure. It drives high-performance subwoofers to their peak and works particularly well with HELIX and MATCH subwoofer chassis and enclosure subs.

• Advanced Class D design for an excellent power-to-size ratio
• Integrated active crossover and high-power stereo highlevel input with signal summing, up to 32V RMS input sensitivity and ADEP.3 circuit — ideal for factory subwoofer amplifier upgrades
• DirectDSP function: the input signal bypasses the integrated active crossover and is routed unfiltered to the output stage
• Mono RCA input makes it a natural complement to Match UPGRADE DSP amplifiers such as the Match UP 8DSP MK2
• Start-Stop capable power supply with extended input voltage range up to 18V — suitable for modern EVs
• Clipping LED for quick and easy gain adjustment
• Remote control for subwoofer volume optionally available
• Compact dimensions for space-saving installation

Perfect integration without compromises

The UP 1FX is designed to slot cleanly into factory systems. The high-power stereo highlevel input with ADEP.3 handles up to 32V input voltage and includes signal summing, making it straightforward to replace or supplement an OEM subwoofer amplifier. The mono RCA input and DirectDSP function make it an equally capable partner for Match UPGRADE DSP amplifiers. The Start-Stop capable power supply with an input range up to 18V also allows use in modern electric vehicles.

Pure sound enjoyment

Beyond raw output, the UP 1FX is built for audio quality. Its special construction, 108dB signal-to-noise ratio and 0.002% THD deliver clean, low-distortion sound — making it suitable for heavy-duty mid-woofers in audiophile system builds, not just subwoofer duty. The DirectDSP function bypasses the internal crossover and routes the input signal unfiltered to the output stage for those who need full signal control.

Compact dimensions for flexible installation

Despite its output capability, the UP 1FX measures just 46 x 130 x 153 mm — the same compact footprint as the Match UP 8DSP MK2. This makes it straightforward to install even where space is tight.

Smart highlevel input ADEP.3

Modern factory head units use sophisticated speaker-line diagnostics. Connecting a standard amplifier can trigger error messages or disable features such as the fader function. The UP 1FX avoids this with the ADEP.3 circuit (Advanced Diagnostics Error Protection, 3rd generation), which protects against these issues without unnecessarily loading the OEM radio's speaker outputs at high volumes.

Start-Stop capability

The switched-mode power supply maintains a stable internal supply voltage even when battery voltage drops to 6V during engine crank. If the supply voltage falls below 10.5V for more than five seconds, the amplifier enters Protect mode (status LED lights red) to prevent further battery discharge.