Experience deep, focused power with 2nd generation Basscannon technology from FATfreq: a 25 dB sub-bass shelf expertly controlled at 150 Hz. The signature vent-less FATfreq system delivers phase-accurate 3D sound, allowing for precise placement of instruments and vocals in a spacious soundstage. The Deuce stands out with exceptional dynamics, effortlessly reproducing both delicate and powerful moments. Providing you with the best of both worlds at an affordable price.
Throughout the year, Deuce was carefully tuned by leading reviewer HBB, also known as Bad Guy Good Audio Reviews, undergoing numerous tuning and design stages. Each stage aimed to enhance the clarity, depth, and dynamics of the sound. HBB's extensive collection of hip-hop, rock, and classical tracks heavily influenced Deuce's tuning direction, with significant efforts made to excel in these genres. The meticulous process also included valuable feedback from professional musicians, including bassists, drummers, and synthesizer keyboardists, who tested Deuce in both studio and concert conditions. The result of such dedication is an IEM that provides unparalleled sound quality and a sense of total immersion.
Dynamic Chambers
The new FATfreq acoustic system features enhanced acoustic networks that control the propagation of sound waves to achieve optimal detail and accuracy. Specialized bass chambers optimize airflow to enhance bass tonality and depth.
Low Frequency Boost Adapter
Designed to enhance listening quality through additional low-frequency amplification. Carefully crafted from high-quality components, including pure silver wiring, this adapter provides a ~10dB boost in low frequencies at 150 Hz. Ideal for those seeking deeper and more powerful bass without sacrificing accuracy and sound quality.
Signature Sonar La Trompa Technology
Inspired by the anatomy of a traditional trombone, FATfreq uses exponential trombone curvature to adjust amplification and improve high frequency tonality through acoustics. Provides smooth, natural sound on high frequencies, supported by pleasant timbre on mid and low frequencies.
Phase Alignment
The absence of DSP in IEMs means that phase must be aligned in multi-driver earphones using acoustic delay. Using proprietary structures, engineers were able to align low, mid, and high frequencies so they consistently reach your eardrum. Providing the accuracy and resolution of sound required on stage and in the studio.
2nd Generation Basscannon Technology
Immerse yourself in deep, focused power with 2nd generation Basscannon technology from FATfreq: a 25 dB sub-bass shelf precisely controlled up to 150 Hz. The proprietary vent-less FATfreq system provides phase-accurate 3D audio, precisely placing instruments and vocals in a spacious sound scene. "The Deuce" excels in dynamics, easily capturing both delicate and powerful moments, offering the best of both worlds at an unbeatable price.
In the Box:
- Earphones
- Pure silver copper SPC cable 3.5mm
- Cleaning tool
- Set of silicone S/M/L ear tips
- Documentation





































