Stetsom IR 400.1 MONO Full Range Compact Digital Amplifier – 400W RMS 2 Ohm
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The Stetsom IR 400.1 MONO is built for people who want a compact monoblock amplifier that is not limited to bass-only duty. This full-range Iron Line amp is made for installs where space is tight but you still want real power and flexibility for mids, highs, full-range speakers, or even smaller subwoofer applications depending on how the system is set up. Stetsom says the Iron Line Series features one of the most compact and enhanced designs on the market while still offering high-fidelity sound in bass, mids, and highs.
Even though the chassis is small, the IR 400.1 MONO still brings useful real-world output. It is rated at 400 watts RMS at 2 ohms and 160 watts RMS at 4 ohms at 13.8V, or 430 watts RMS at 2 ohms and 250 watts RMS at 4 ohms at 14.4V. That makes it a practical option for compact speaker builds, stronger midrange setups, or installs where you want a small full-range mono amp that can still do serious work.
One of the best things about this amp is how flexible the crossover section is for a compact mono design. Stetsom includes a low-pass filter from 60 Hz to 22 kHz and a high-pass filter from 10 Hz to 700 Hz, which gives you a lot more setup freedom than a bass-only amplifier. It also supports both RCA input and wire input, making it easier to integrate into aftermarket or factory-style systems. With its 52.5 x 99.8 x 127.5 mm footprint and 508 g weight, this is the kind of amp that makes sense when you need output without giving up install space.
Whether you are powering mids, highs, full-range speakers, or building a small space-conscious system that still needs real amplifier power, the Stetsom IR 400.1 MONO gives you useful output, flexible input options, and a compact design that is easy to work around.
Key Features
Number of Channels: 1 channel mono amplifier.
Application: Full-range compact amplifier for bass, mids, and highs.
RMS Power at 2 Ohm 13.8V: 400 watts RMS.
RMS Power at 4 Ohm 13.8V: 160 watts RMS.
RMS Power at 2 Ohm 14.4V: 430 watts RMS.
RMS Power at 4 Ohm 14.4V: 250 watts RMS.
Supply Voltage: 9V to 15V.
Frequency Response (-3dB): 10 Hz to 22 kHz.
Crossover Low Pass: 60 Hz to 22 kHz.
Crossover High Pass: 10 Hz to 700 Hz.
Signal to Noise Ratio: Greater than 90 dB.
Harmonic Distortion: Greater than 0.01% THD listed on page.
Input Sensitivity: RCA 200 mV / Wire 1.5V.
Input Impedance: RCA 38K ohms / Wire 10K ohms.
Consumption with Musical Signal: 18A.
Consumption with Bass Signal: 36A.
Dimensions: 52.5 x 99.8 x 127.5 mm.
Weight: 508 g.
Whether you are trying to power a compact full-range setup or need a small mono amp with more flexibility than a bass-only model, the IR 400.1 MONO gives you practical power and tuning range in a very install-friendly chassis.
