Stetsom HL 1200.4 Digital Amplifier – 4 Channels Full Range Class D 1.2K RMS

Stetsom HL 1200.4 Digital Amplifier – 4 Channels Full Range Class D 1.2K RMS
Sold by AudioSellerz.com

The Stetsom HL 1200.4 is built for people who want real 4 channel power without stepping into a giant oversized amp. This full-range Class D amplifier is made for stronger speaker builds, louder mids and highs, and systems that need more headroom than a basic 4 channel can give. With four channels and serious stereo or bridged output, it makes a lot of sense for customers building aggressive daily systems, pro-audio-style speaker setups, or compact installs that still need real power.

One of the best things about the HL 1200.4 is the flexibility. The page shows a 1 ohm version and a 2 ohm version, and this listing specifically includes that selectable output impedance option. On the 1 ohm version, it is rated at 4 x 300 watts RMS at 1 ohm and 4 x 200 watts RMS at 2 ohms at 12.6V, with even higher output at 14.4V. That means this amp can be used in a wide range of stronger speaker systems where you want more output per channel or more bridged power without giving up the simplicity of a 4 channel design.

Stetsom also keeps the tuning simple and practical. The HL 1200.4 includes fixed 90 Hz high-pass and low-pass crossovers, plus +12 dB bass boost on the low-pass side. The frequency response is listed at 10 Hz to 26 kHz, with greater than 90 dB signal-to-noise ratio and less than 0.3% THD. In real-world terms, that gives you a powerful full-range amp that still has the basic controls needed for speaker duty, mids and highs, or bridged applications in the right setup.

If you want a 4 channel amplifier that can bring real output, strong channel flexibility, and enough power to wake up a serious speaker system, the Stetsom HL 1200.4 is the kind of amp worth building around.

Key Features

Number of Channels: 4

Available Output Impedance Options: 1 ohm or 2 ohms, depending on variant

Technical Specs (1 Ohm Version)

RMS Power at 1 Ohm 12.6V: 4 x 300 watts RMS (stereo)

RMS Power at 2 Ohms 12.6V: 4 x 200 watts RMS (stereo)

RMS Power at 1 Ohm 14.4V: 4 x 350 watts RMS (stereo)

RMS Power at 2 Ohms 14.4V: 4 x 260 watts RMS (stereo)

Bridged Power at 2 Ohms 12.6V: 2 x 600 watts RMS (bridge)

Bridged Power at 2 Ohms 14.4V: 2 x 700 watts RMS (bridge)

Power Supply: 9V to 15V

Frequency Response: 10 Hz to 26 kHz

Bass Boost (Low Pass): +12 dB

Low Pass Crossover: 90 Hz

High Pass Crossover: 90 Hz

Signal to Noise Ratio: Greater than 90 dB

Harmonic Distortion: Less than 0.3% THD

Input Sensitivity: 0.2 V

Input Impedance: 14K ohms

Minimum Output Impedance: 1 ohm stereo / 2 ohms bridge (1 ohm version)

Consumption with Musical Signal: 57 A

Bass Signal Consumption: 114 A

Whether you are building a loud mids-and-highs setup, a stronger full-range speaker system, or need a compact 4 channel that can bridge into real power, the HL 1200.4 gives you the kind of output and flexibility that make bigger builds easier to plan.

Download Manual