My Klipsch ProMedia 2.1 system IS a high-end system. And I use high-end JBL studio monitors in my studios.
All loudspeakers, including high-end systems, color sound to some degree. It is by nature an inescapable, built in bias of every transducer or speaker to add its own tone color to the sound it produces or reproduces. Microphones work the same way only in reverse. Each transducer sounds different. A transducer transforms one form of energy into another; e.g., acoustic energy into electrical energy and vice versa. The Third Law of Thermodynamics or entropy guarantees that energy will be lost in the form of heat. That's right, sound energy is lost in the form of heat. That is how the anechoic chambers where speaker frequency response curves are plotted work. The anechoic acoustic wedges lining the ceiling, floor, and walls of an anechoic chamber dissipate sound energy by transforming it into heat energy. Since sound energy is lost in the form of heat energy dissipated by the components of a speaker, every speaker colors the original sound. Even the air we breathe colors sound.
I beg to differ that ONLY a musical instrument can produce music and that everything else on the planet only reproduces music. Everything on the planet can PRODUCE music if used as a musical instrument; e.g., ANY wooden or metal object can become a metallophone or xylophone, any hollow box or tube can become a resonator that produces a musical tone, and that includes speaker components made of cloth, paper, plastic, metal, wood, or composites. Musical instrument speakers by nature produce tone.
Analog and digital effects stompboxes, vacuum tube guitar amps, and speakers all become part of the sound of an instrument in a Zen kind of way. That is why a professional guitar player wouldn't produce music by playing a guitar through home stereo speakers or studio monitors, but WOULD play a guitar through Celestion, Eminence, Jensen, or Weber GUITAR speakers. Only a guitar speaker can produce the speaker cone breakup required for correct guitar tone; and only an alnico magnet guitar speaker can produce compression at the high volume levels required to achieve the speaker cone breakup that adds harmonic overtones to the sound of a vibrating guitar string. Effects stompboxes, vacuum tube guitar amps, and guitar speakers all become part of the instrument. Jimi Hendrix' guitar and the speakers in his Marshall stacks were inseperable and both PRODUCED his guitar sound. Hendrix played his speakers as much as he played his Fender Stratocaster guitar. His speakers became an integral part of his musical instrument. Some of the most famous guitar solos ever recorded were produced by Celestion guitar speakers. The microphones in the studios were pointed at the guitar speakers, not the guitar, because the speakers were producing part of the sound being recorded.