Stetsom STX 2448 DSP Crossover & Equalizer – 4 Channel Full Digital Signal Processor with Sequencer 2.4

Stetsom STX 2448 DSP Crossover & Equalizer – 4 Channel Full Digital Signal Processor with Sequencer 2.4
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The Stetsom STX 2448 is built for people who want real control over a multi-amp car audio system without making the setup harder to manage. This full digital signal processor gives you 2 audio inputs and 4 independent outputs, which makes it a strong fit for more serious builds where signal routing, tuning, and system protection all matter. Through its LCD display and intuitive interface, the STX 2448 allows real-time audio adjustments, giving you a cleaner way to dial in the system without guessing.

One of the biggest strengths of the STX 2448 is how much flexibility it gives you in tuning. Stetsom includes a 15-band graphic equalizer with 12 preset curves, plus 1 input parametric EQ and 1 parametric EQ per output with gain, frequency, and Q adjustment. That gives you enough control to do quick tuning or really fine-tune a serious system when you need more precision. The processor also lets you choose source A, source B, or A+B for each output, which is a big deal for more complex signal routing.

The crossover section is strong too. The STX 2448 allows variable crossover adjustment with both Butterworth and Linkwitz-Riley filter options at 12, 18, 24, 36, and 48 dB slopes. It also includes alignment up to 8 ms, phase inversion from 0 to 180 degrees, independent gain by output, master level control, and a limiter with a dynamic attack-release system for better amplifier and speaker protection. In a real build, that means this processor can help clean up staging, tighten output balance, and protect the system when things get pushed hard.

Stetsom also added real-world features that make this processor easier to live with. It has save and load settings with autosave plus 5 memory slots, a 4-digit security password, editable text screensaver, language selection, built-in frequency generator, frequency sweep, pink noise generator, and sequencer output for remote product activation. If you are building a serious car audio setup and want one processor that gives you deep control without needing a pile of separate tools, the STX 2448 is the kind of unit worth building around.

Key Features

Type: Full digital signal processor with crossover, equalizer, and sequencer functions.

Channels: 2 input / 4 output.

Display: LCD display with intuitive real-time adjustment interface.

Graphic Equalizer: 15 bands with gain approx. 12 dB.

Graphic EQ Presets: 12 presets.

Parametric Equalizer: 1 input + 1 per output with gain approx. 12 dB and Q factor 0.4 to 10.0.

Routing Between Input and Output: A, B, or A+B.

Crossover Filter Types: Butterworth and Linkwitz-Riley.

Crossover Slopes: 12 / 18 / 24 / 36 / 48 dB per octave.

Alignment: 0 to 8 ms (275 cm).

Phase Inversion: 0° to 180°.

Limiter: Threshold -24 to 0 dB / Attack 0.1 to 100.0 ms / Release 1 to 1600 ms, manual or automatic.

Master Level and Gain: 0 to 100 percent, gain -45 to +15 dB per output.

Memory: Autosave + 5 save/load slots.

Security: 4 digit password lock.

Frequency Generator: 10 Hz to 22 kHz, level -60 to 0 dB.

Frequency Sweep: 10 Hz to 22 kHz with speed control.

Pink Noise Generator: 10 Hz to 22 kHz, level -60 to 0 dB.

Languages: Portuguese, English, and Spanish.

Latency: 1.08 ms.

Input Impedance: 10K ohms.

Output Impedance: 47 ohms.

Max Input and Output Voltage: 5.6 Vpp (+8.2 dBu).

Max Output Current Sequencer: 180 mA per output.

Saturation Indicator: 1 per input + 1 per output linked to the limiter.

Signal to Noise Ratio: Greater than 90 dB.

Total Harmonic Distortion: Less than 0.01 percent.

Channel Separation: Greater than 80 dB.

Power Supply: 9V to 16V DC.

Max Current Consumption: 350 mA at 12.6V DC.

Whether you are building a louder everyday system or putting together a more serious multi-amp setup that needs cleaner signal routing, crossover control, and better tuning accuracy, the STX 2448 gives you the kind of DSP flexibility that helps the whole system work better together.