SpeakerCraft MT8THREE in-Wall-Speaker-System, White, 20 cm Aluminium Cone Woofer, 6,4 cm Aluminium Dome Middle Range, 2,5 cm Aluminium Dome Tweeter, Front Mounted Buttons Allow For Up To ± 3 dB of Bass, Midrange & Treble Adjustment, Power Recommendations : 5 - 200 W, Efficiency: 90 dB, Frequency Response: 39Hz - 20kHz, Impedancy: 8/ 6/ 4 Ohms, Timbre-Matched to AIM8 Three, CRS8 Three, CRS Three, MT Three, Dimensions: 42,2 x 27 x 8,5 cm, Cut-Out-Diameter: D x W : 38,4 x 23,2 cm