LF
Mid-Woofer
8"
8FHM
Code: 8FHMX4-091
Woofer/8inch/Ferrite/Paper Honeycomb/50W/4ohm
Key Features
- EXTENDED FREQUENCY RESPONSE
- 1k carbon-fiber nomex core honeycomb cone
- Ideal for high quality hi-fi applications, studio monitors
Quick Specs
Impedance
4 Ω
Program Power
100 W
Sensitivity
89.04 dB
Fs
38.00 Hz
Magnet
Ferrite
Voice Coil
35.6 mm
Design Notes
The 8FHM is a high efficiency, (89 dB 1watt / 1 meter) 8-inch mid-woofer with incredibly linear frequency response characteristics and ultra low harmonic distortion artifacts. The 8FHM uses a lightweight 1k carbon fiber material, assembled from both sides of Nomex honey-comb core. This unique cone provides the ideal weight to strength ratio. The rubber surround has been FEM modeled and optimized. The honeycomb cone with high end 1k carbon fiber material provides remarkable strength, while pushing the cone break-up modes to high frequencies, significantly extending the working range of the speaker.
The cone
The 8FHM cone is made using 1k carbon fiber hone-comb, placed from both sides of Nomex core, while the dustcap is made off hard-anodization reinforced aluminum. The dustcap shape and the hard anodizing are further improving the high frequency behavior.
The cone
The 8FHM cone is made using 1k carbon fiber hone-comb, placed from both sides of Nomex core, while the dustcap is made off hard-anodization reinforced aluminum. The dustcap shape and the hard anodizing are further improving the high frequency behavior.
Specifications
General Specs
Nominal Diameter
8"
Rated Impedance
4 Ohm
Magnet
Ferrite
Basket Material
Aluminum
Power Handling
AES Power
50 W
Continuous Power
100 W
Peak Power
200 W
Voice Coil
Diameter
35.6 mm
Winding Wire
CCAW
Former
kapton
Winding Height
18 mm
T/S Parameters
Resonant Frequency (Fs)
38.00 Hz
Re
3.60 \u2126
Qes
0.410
Qms
12.90
Qts
0.390
Vas
32.10 liters
Sd
206.10 cm\u00B2
Mms
31.50 grams
Rms
0.58
Cms
0.5600
Bl
8.19 T\u00B7m
Le
0.460 mH
Sensitivity
89.04 dB
Design Details
Surround Material
NBR
Cone/Dome Material
Composite
Spider
Nomex
T-Plate
8 mm
Xmax (peak)
5 mm
Xmech
13 mm
Overall Diameter
223.50 mm
Bolt Circle Diameter
210.00 mm
Baffle Cutout Dia.
189.00 mm
Mounting Holes
6
Depth (flange to rear)
94.50 mm
Net Weight
2.80 kg
Ordering Codes
Product Code
8FHMX4-091
Downloads
Frequency Response & Impedance
2D Drawing
Enclosure Recommendations
Recommended enclosure alignments (bass reflex): - 22 liters tuned to 44 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 40 Hz, HP filter 36 Hz - 24 liters tuned to 40 Hz: balanced response, general-purpose (recommended); -3 dB approx. 37 Hz, HP filter 30 Hz - 24 liters tuned to 36 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 31 Hz, HP filter 24 Hz
Frequently Asked Questions
- - EXTENDED FREQUENCY RESPONSE
- - 1k carbon-fiber nomex core honeycomb cone
- - Ideal for high quality hi-fi applications, studio monitors
Recommended enclosure alignments (bass reflex): - 22 liters tuned to 44 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 40 Hz, HP filter 36 Hz - 24 liters tuned to 40 Hz: balanced response, general-purpose (recommended); -3 dB approx. 37 Hz, HP filter 30 Hz - 24 liters tuned to 36 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 31 Hz, HP filter 24 Hz
High-efficiency vented pa mid-woofer or bass-mid cabinet
AES Power: 50 W,
Continuous: 100 W,
Peak: 200 W.
Sensitivity: 89.04 dB (1W/1m).
