Zacks CMR165.9 Midrange + Pulse CTW28SQ Sound Quality Tweeters

Technical Specifications:
Midrange
Fyber Glass Cone
Rubber Surround
Steel Basket
Peak power: 180W
RMS power: 90W
Ohm: 4
Voice Coul: 1″(25mm)
Fs: 71.36Hz
dBSPL: 89.20
Vas: 9.79L
Qts: 0.58
Qes:0.68
Qms: 4.04
B*l: 4.29 T*m

Tweeter
28mm soft silk dome
N57 Neodymium magnet
4 Ohm voice coil in 99.97% pure copper cooled by FerroFluid,
Ergal chassis completely machined from solid with numerical control.
Resonance Frequency: 1.386Hz,
Bearable Power 160WRms,
Efficiency 90dB