US Acoustics

US Acoustics brings over 25 years of Class AB amplifier engineering from Korea to drivers who need clean power and solid build quality. This collection features the Lanna 6-channel and Mike monoblock amplifiers, plus the Barbara Ann, Lisa, Andrea, and Wendy multi-channel series. Each amp uses full-complementary Class AB topology or efficient Class D circuits built for SPL competition and daily sound quality. Models range from 75 watts to 3,500 watts RMS, covering compact two-channel installs through multi-amp competition builds. Audio Intensity is an authorized US Acoustics dealer with full warranty support.

All About US Acoustics

US Acoustics launched in the early 1990s with a focus on performance car audio amplifiers. The brand operated through the 1990s and 2000s with manufacturing partnerships including Zed Audio Corporation, which built amplifiers for multiple brands during that period. From 1997 to 2000, Zed produced several US Acoustics models ranging from 2×50 watt units to the USX1000F delivering 1,000 watts RMS. After a period off the market, US Acoustics returned in the 2010s with a renewed product line centered on Korean manufacturing and Class AB amplifier design.

The current US Acoustics lineup divides into two families. The Class AB series includes Wendy (2×75W), Andrea (2×150W), Lisa (4×50W), Barbara Ann (4×100W), and Lanna (6×150W). These amplifiers use full-complementary output stages, angled terminals for clean wiring, Butterworth crossovers, and discrete gain controls. The Class D Monoblock series covers subwoofer duty with Mike (1,500W at 1 ohm), Nick (2,500W at 1 ohm), and Big Ben (3,500W at 1 ohm). All Class D models include adjustable low-pass filters, subsonic filters, bass boost, and phase control.

US Acoustics amplifiers come from Korean production facilities known for building amplifiers for brands like Sundown Audio, Crescendo, and Deaf Bonce. Korean-built boards typically feature oversized transformers, parallel output transistors, thick copper PCB traces, and thermally stable heatsink designs. The manufacturing approach prioritizes current delivery and thermal management over features like DSP or Bluetooth connectivity. US Acoustics amplifiers do not include built-in digital signal processing, making them compatible with external DSP units like the Dayton Audio DSP-408 or AudioControl processors.

The Lanna 6-channel amplifier stands out as the flagship Class AB model. It delivers 150 watts RMS per channel at 4 ohms (250 watts at 2 ohms) across all six channels simultaneously. The amplifier measures 25.5 inches long, weighs over 20 pounds, and runs warm under load due to Class AB efficiency limits. Users pair the Lanna with DSP processors because it omits onboard crossovers beyond high-pass/low-pass filters, allowing the DSP to handle time alignment, equalization, and phase correction. The amplifier's discrete gain controls and minimal internal processing preserve signal integrity for DSP tuning.

Mike, Nick, and Big Ben monoblocks handle subwoofer applications. The Mike outputs 1,500 watts RMS at 1 ohm with a 10Hz-150Hz frequency response and less than 1 percent total harmonic distortion. The Big Ben scales to 3,500 watts RMS at 1 ohm using a thermally optimized heatsink and oversized power terminals. All three monoblocks accept 200mV to 6.0V input sensitivity, work with factory head units or aftermarket processors, and include protection circuits for DC offset, short circuits, thermal overload, and reverse polarity.

US Acoustics targets sound quality competitors and daily drivers who run external DSPs. The brand avoids built-in tuning features, RGB lighting, and app control. Instead, amplifiers focus on power delivery, low distortion (less than 0.01 percent THD for Class AB models), and frequency response accuracy (10Hz-30KHz ±0.5dB). The approach suits builds where a standalone DSP handles tuning and an amplifier only provides gain. The Lanna 6-channel works well in front-stage active setups, while monoblocks drive sealed, ported, or bandpass subwoofer enclosures.

The brand competes with other Korean-built lines like Sundown Audio SALT series, Deaf Bonce Apocalypse, and Korean OEM amplifiers sold under various labels. US Acoustics positions below Sundown's premium tier in price while maintaining similar Korean manufacturing standards. Reviews note good output power accuracy, stable operation into low impedance loads, and solid mechanical construction. Common feedback mentions amplifier size and heat output for Class AB models, plus the lack of built-in DSP or remote controls.

US Acoustics maintains distribution through specialty car audio retailers and online dealers. The brand supports professional installation shops with technical documentation and warranty service through authorized dealers. Audio Intensity carries the full US Acoustics amplifier range and provides pre-sale consultation for system design, amplifier selection, and power requirements. All US Acoustics products purchased through authorized dealers include manufacturer warranty coverage and access to technical support through the dealer network.