Bose L1 Model II System With B1 Bass And Tonematch Audio Engine &ndash; Black Spatial DispersionTM and Articulated Array speaker technologies in the loudspeaker produce wide. Integrated power amplifiers in the power stand provide clean. ToneMatch port on power stand for digital audio and power connection. Integrated power amplifiers in power stand deliver clean. Tone Match audio engine T1 Tone Match audio engine features proprietary Bose audio technologies for live sound.