8FHW

ENCLOSURE RECOMMENDATIONS: 8FHWX4-382
Driver: 8FHWX4-382 (8FHW) — 8" Sub-woofer
Key T/S: Fs=36.0Hz, Qts=0.35, Vas=34.3L, Sens=89.12dB
Power: AES 100W / Cont 200W / Peak 400W
Xmax=3.65mm, Sd=213.8cm², Bl=8.6T·m
RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented)
PORT RECOMMENDATION: Round port (65mm diameter) — adequate for compact enclosures with lower air volume velocity
  a) High SPL
     Net Volume: 20 liters
     Tuning (Fb): 41 Hz
     Est. -3dB: 38 Hz
     HP Filter: 33 Hz (24dB/oct recommended)
     Round Port: 65mm dia × 234mm long
     Slot Port: 148mm W × 40mm H × 437mm L
     Port Velocity: 6.1 m/s
     Notes: Strong mid-bass impact, reduced cone excursion, maximum output
  b) Balanced Response
     Net Volume: 24 liters
     Tuning (Fb): 38 Hz
     Est. -3dB: 35 Hz
     HP Filter: 28 Hz (24dB/oct recommended)
     Round Port: 65mm dia × 229mm long
     Slot Port: 148mm W × 40mm H × 429mm L
     Port Velocity: 5.6 m/s
     Notes: General-purpose PA/subwoofer, even response, good transient behavior
  c) Extended Low Frequency
     Net Volume: 24 liters
     Tuning (Fb): 34 Hz
     Est. -3dB: 29 Hz
     HP Filter: 22 Hz (24dB/oct recommended)
     Round Port: 65mm dia × 291mm long
     Slot Port: 148mm W × 40mm H × 538mm L
     Port Velocity: 5.1 m/s
     Notes: Deep bass extension, requires proper system protection below tuning
--- Summary ---
The 8FHWX4-382 is a 8-inch sub-woofer driver designed for compact hi-fi subwoofer systems, home audio, and cost-effective installation applications. It operates at 89.1 dB sensitivity (1W/1m). The motor and suspension are optimized to maintain consistent performance at high drive levels, with controlled excursion and reduced thermal compression during long-term operation.
In bass reflex enclosures, the driver performs best in net internal volumes of 20 to 24 liters, tuned between 34 and 41 Hz. This alignment provides a balanced combination of low-frequency extension, cone control around resonance, and efficient port loading. Lower tuning improves deep bass extension but increases excursion below tuning, requiring appropriate high-pass filtering. Higher tuning increases sensitivity and output in the upper bass region while improving mechanical control.
The driver is intended for use with moderate amplification (approx. 100 W AES / 200 W continuous) and DSP control. A high-pass filter in the range of 22–33 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 29–100 Hz, suitable for integration with a mid-bass or full-range driver in a two-way system.