PRO-ZT6x9 Car Speakers with Bullet Tweeter Mid-Range Loudspeaker

DS18 amassed a wealth of experience in manufacturing the most elegant neodymium midranges for those seeking simple perfection. Neodymium magnets provide a higher magnetic flux density in the air gap, which generates a much greater action force in the voice coil. For this reason, Neo magnets have the strongest permanent magnets of all the commercially available speakers. Ranging in sizes, mounting depths, and frequency responses, we have more than 10 different models of Neo midranges to accommodate any build.
Specs

Nominal Diameter: 6 x 9" 
Nominal Impedance: 4 Ohms 
RMS Power Handing: 275 Watts 
MAX Power Handing: 550 Watts 
Sensitivity (1w/1m): 98dB 
Frequency Response: 60Hz - 22KHz 
Recommended Hi Pass Crossover: 80Hz
 
Midrange  

Voice Coil Diameter: 1.5" (38.1mm) 
Voice Coil Former Material: Kapton 
Winding Material: CCAW 
Basket Material: Steel 
Magnet Weight: 27 oz. 

Tweeter  

Voice Coil Diameter: 1" 
Voice Coil Material: Kapton 
Winding Material: CCAW 
Diaphragm Material: Aluminum Alloy 
Magnet Weight: 0.44 oz. 
Magnet Material: Neodymium 

Thiele & Small Parameters  

Equivalent Volume / Vas: 14.6927 L 
Excursion / Xmax: 16mm 
Free Air Resonance / Fs: 85Hz 
Mechanical Factor / Qms: 3.906 
Electrical Factor / Qes: 0.639 
Total Factor / Qts: 0.549 
DC Resistance / Re: 3.2 ohms 

Measurements
  
Overall Diameter: 260 x 180mm (10.24 x 7.09") 
Front Mount Baffle Cutout: 219 x 150 (8.62 x 5.91") 
Mounting Depth: 85 mm (3.35") 
Overall Depth: 97 mm (3.81")