(Specifications vary by product components – Please refer to documents for advanced specifications.)

• System type: 2-way passive component set (6.5" midbass + 1.1" tweeter)
  
• Impedance: 4 Ω (DC resistance Re: 3.9 Ω)
  
• Power handling: 75 W continuous / 150 W max
  
• Sensitivity: 90 dB
  
• Frequency response: 60 Hz – 20,000 Hz
  
• Voice coil diameter: 25.4 mm
  
• Resonant frequency (Fs): 90 Hz
  
• Xmax: ± 3.4 mm
  
• Vas: 5.8 L
  
• Qts: 1 (Qms: 7 / Qes: 1.3)
• High-pass slope: 12 dB/oct
• Low-pass slope: 6 dB/oct
• Mounting diameter: 145 mm
  
• Mounting depth: 58.5 mm
  
• Weight: 1.5 kg

• True 2-way passive component system with included passive crossover (simple, proven upgrade path)
• Paper cone midbass + concave paper dust cap for natural damping and controlled response
  
• Overhung ferrite motor (midbass) designed for more linear movement and reduced distortion at volume
  
• 28 mm fabric dome tweeter with neodymium motor for detailed, controlled high frequencies
  
• Integrated aluminium tweeter housing for stability and reduced vibration
  
• Passive crossover uses 12 dB/oct high-pass + 6 dB/oct low-pass

• Factory head unit upgrades where you want cleaner, more detailed sound without complex system changes
• Entry-level SQ builds using a small 2–4 channel amp
  
• Listeners who want smooth highs (silk dome) rather than bright/aggressive treble
  
• Doors with standard 6.5" locations

If you want a proper step up from factory sound without committing to a full active/DSP build straight away, the Revolution 1S2 Passive makes a lot of sense. The driver choices are classic “SQ-first”, a paper midbass for natural tone and a 28 mm fabric dome tweeter for detail without harshness, and the included 2-way passive crossover keeps the install simple while still giving you a real component upgrade path. It’s the kind of set we’d put in a daily that still needs to sound right, not just louder.