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Quintessence Audio jedan je od najpoznatijih i najcjenjenijih prodavača audio opreme u Chicagu. Oni nude pažljivo odabrani izbor vrhunskih audio komponenata. Web stranica ima ograničene podatke.
Trgovina nosi Accuphase, Avalon Acoustics, Audio Research, Basis, Cardas, Clearaudio, Immedia, Jeff Rowland Design Group, Lyra, Mark Levinson, Meridian, Pass Labs, Pro-Ac, Rega, Revel, Sonics, Sonus Faber, Sumiko, Wavelength Audio, Vandersteen Audio i brojne druge marke.