Stetsom STX 2448 DSP Crossover & Equalizer 4 Channel Full Digital Signal Processor (Sequencer)

The Stetsom STX 2448 DSP Crossover & Equalizer is a 2-input, 4-output digital signal processor built for precise multi-amp car audio systems, offering real-time tuning via LCD and an intuitive interface. It combines graphic and parametric EQ, advanced crossovers, dynamic limiting, and a REM sequencer for integrated system control.

• Number of Channels: 2 input / 4 output — provides two stereo inputs and four independent outputs to drive multiple amplifiers or zones in a single install.
• Graphic Equalizer: 15 bands (gain approx. 12 dB) — broad tonal shaping across the spectrum to correct room nulls and fine-tune overall balance.
• Graphic Equalization Presets: 12 — ready-made curves for common genres and listening targets, enabling quick tonal shifts without manual tweaking.
• Parametric Equalizer: 1 input + 1 per Output (gain approx. 12 dB, Q 0.4–10.0) — precise, frequency-specific control for surgical adjustments on each channel.
• Crossover: Butterworth (12/18/24/36/48 dB/8th) or Linkwitz-Riley (12/18/24/36/48 dB/8th) — configurable slope and topology for clean, targeted frequency separation.
• Routing between Input and Output: A, B or A+B per output — flexible source selection to tailor each output to a specific speaker configuration.
• Alignment: 0–8 ms (275 cm) — precise time delay to align multiple loudspeakers for coherent imaging in the cabin.
• Phase Inversion: 0°–180° — invert the output phase to correct polarity mismatches between drivers.
• Limiter: Threshold -24 to 0 dB; Attack 0.1–100 ms; Release 1–1600 ms (manual/automatic) — protects amps and drivers from clipping while maintaining dynamics.
• Master Level: Master Level control — global level adjustment to balance the entire processed signal.
• Display and Controls: LCD display, Encoder, Hotkeys — real-time interaction for on-the-fly adjustments without external software.
• REM Sequencer: Sequencer enables activation of other devices via REM; REM IN auto-activates amplifiers with the head unit — coordinates power-up sequencing for system reliability.
• Inputs/Outputs: AUDIO INPUT — RCA connectors (A and B) with independent actuation; AUDIO OUTPUT — RCA connectors delivering processed audio per settings.
• Power and Safety: NEGATIVE POWER CONNECTOR (GND); POSITIVE CONNECTOR (+BAT); recommended external fuse 1A — clearly defined power wiring for safe installation.
• Memory and Security: Save/Load Settings in memory; Security Password to block parameter edits; Marquee/Text Display with Language Selection (English, Spanish, Portuguese) — ensures stable, user-controlled configurations across installs.

The STX 2448 is aimed at enthusiasts who want comprehensive, frame-accurate control of crossovers, EQ, and dynamics in a single chassis, with safety features and sequencing to keep complex systems reliable and repeatable.