Pk 635 Driver File

Its construction and parameters suggest a focus on rather than ultra-deep sub-bass extension.

Value-for-money category: 9/10

| Parameter | Value | Notes | |-----------|-------|-------| | Nominal Diameter | 15" (381 mm) | | | Impedance (nominal) | 8 Ω (or 4 Ω option) | | | Power Handling (RMS) | 500 W | Some variants rated 600 W | | Power Handling (Peak) | 1000 W | | | Sensitivity (1W/1m) | 97 – 99 dB | High sensitivity – good for live sound | | Frequency Response | 40 Hz – 3 kHz | Depends on enclosure | | Resonance Frequency (Fs) | ~42 Hz | | | Voice Coil Diameter | 3" (76.2 mm) | High-temperature copper or aluminum | | Magnet Type | Ferrite (large slug) | Occasionally neodymium in premium versions | | Cone Material | Paper with treated cloth surround | Often with stiffening ribs | | Basket | Cast aluminum or stamped steel | Cast preferred for thermal/mechanical stability | | Xmax (linear excursion) | 6–8 mm | Moderate – not for extreme subwoofer use | | BL Factor | ~18–22 Tm | Good motor strength | pk 635 driver