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Engineered for space-conscious audiophiles, the Stetsom HL 400x4 2-Ohm 4-Channel Compact Digital Amplifier delivers an impressive 400 Watts RMS of full-range power from an ultra-small 4.9 x 4.9-inch aluminum frame. Featuring a high-efficiency MOSFET Class D topology, this versatile unit easily integrates into factory setups via high-level inputs or connects directly to aftermarket receiver units. Users gain precise control over sound balance thanks to built-in 90Hz HPF and LPF crossovers, a variable 30Hz–75Hz bass boost adjustment, and an optional flat mode switch. Integrated fan cooling keeps temperatures safe during high-output sessions, making the HL 400x4 an ideal upgrade for door speakers, horn drivers, and compact subwoofers.
| • Enhance low frequencies using variable 30Hz to 75Hz bass boost up to 14dB. • Filter audio precisely with built-in high-pass and low-pass crossover modes. • Fit compact vehicle spaces using an ultra-small aluminum chassis footprint. • Maintain cool operating temperatures under long sessions with active cooling. • Connect factory or aftermarket head units via high-level or RCA inputs. | • Bypass internal sound adjustments easily using the integrated flat mode. • Support full-range audio playback for speakers, door drivers, and tweeters. • Operate efficiently across standard 9V to 15V DC automotive power systems. • Safeguard internal components with robust MOSFET Class D digital design. • Deliver 400W RMS power output at 2 ohms across four versatile audio channels. |
