Stetsom HL 2000.4 Digital Amplifier – 4 Channels Full Range Class D 2K RMS

Stetsom HL 2000.4 Digital Amplifier – 4 Channels Full Range Class D 2K RMS
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The Stetsom HL 2000.4 is built for people who want serious 4 channel power without stepping into a huge oversized chassis. This full-range Class D amplifier is made for stronger speaker builds, louder mids and highs, and systems that need real headroom when basic 4 channel amps are not enough. With four channels and serious stereo or bridged output, it makes a lot of sense for aggressive daily systems, pro-audio-style speaker setups, and compact installs that still need real power.

One of the best things about the HL 2000.4 is the flexibility. The page shows both a 1 ohm version and a 2 ohm version, giving builders different ways to match the amplifier to the rest of the system. On the 1 ohm version, it is rated at 4 x 435 watts RMS at 1 ohm and 4 x 280 watts RMS at 2 ohms at 12.6V, with up to 4 x 545 watts RMS at 1 ohm at 14.4V. Bridged, the 1 ohm model is rated at 2 x 870 watts RMS at 12.6V and 2 x 1100 watts RMS at 14.4V into 2 ohms. On the 2 ohm version, it is rated at 4 x 500 watts RMS at 2 ohms and 4 x 290 watts RMS at 4 ohms at 12.6V, with 2 x 1000 watts RMS bridged at 4 ohms. That gives this amp a ton of flexibility for louder speaker systems or more serious bridged applications.

Stetsom also keeps the tuning simple and practical. Both versions list 20 Hz to 26 kHz frequency response, fixed 90 Hz high-pass and low-pass crossovers, +12 dB bass boost on the low-pass side, greater than 90 dB signal-to-noise ratio, and 200 mV input sensitivity. In real-world terms, that gives you a high-power full-range amp with enough built-in control to handle speaker duty, mids and highs, or bridged applications without making setup overly complicated.

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 2000.4 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 435 watts RMS (stereo).

RMS Power at 2 Ohms 12.6V: 4 x 280 watts RMS (stereo).

RMS Power at 1 Ohm 14.4V: 4 x 545 watts RMS (stereo).

RMS Power at 2 Ohms 14.4V: 4 x 365 watts RMS (stereo).

Bridged Power at 2 Ohms 12.6V: 2 x 870 watts RMS (bridge).

Bridged Power at 2 Ohms 14.4V: 2 x 1100 watts RMS (bridge).

Technical Specs (2 Ohm Version)

RMS Power at 2 Ohms 12.6V: 4 x 500 watts RMS (stereo).

RMS Power at 4 Ohms 12.6V: 4 x 290 watts RMS (stereo).

RMS Power at 2 Ohms 14.4V: 4 x 561 watts RMS (stereo).

RMS Power at 4 Ohms 14.4V: 4 x 338 watts RMS (stereo).

Bridged Power at 4 Ohms 12.6V: 2 x 1000 watts RMS (bridge).

Bridged Power at 4 Ohms 14.4V: 2 x 1080 watts RMS (bridge).

Power Supply: 9V to 15V.

Frequency Response: 20 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: Greater than 0.3% THD listed on page.

Input Sensitivity: 200 mV.

Input Impedance: 15 kOHMS.

Dimensions (H x W x L): 3" x 9.2" x 9.4".

Weight: 6.1 lb for 1 ohm version / 5.9 lb for 2 ohm version.

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 2000.4 gives you the kind of output and flexibility that make bigger builds easier to plan.

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