Zacks CMR100.11 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 Coil: 1″(25mm)
Fs: 76.36Hz
dBSPL: 85.25
Vas: 3.33L
Qts: 0.56
Qes: 0.70
Qms: 2.85
B*l: 3.26 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