LF
Mid-Woofer
8"
8FIND
Code: 8FINDX8-030
Woofer/8inch/Ferrite/Paper/200W/8ohm
Key Features
- EXTENDED FREQUENCY RESPONSE, high efficiency
- Carbon fiber loaded and reinforced paper cone
- Nomex spider
Quick Specs
Impedance
8 Ω
Program Power
400 W
Sensitivity
97.33 dB
Fs
70.00 Hz
Magnet
Ferrite
Voice Coil
50.8 mm
Design Notes
The 8FIND is a high efficiency, (97 dB 1watt / 1 meter) 8-inch mid bass woofer with incredibly linear frequency response characteristics, high power handling capability while generating low harmonic distortion artifacts.
The 8FIND uses a lightweight carbon fiber loaded cone assembly along with a precision double roll surround. This combination provides remarkable strength, high efficiency and a excursion linearity of 9.4mm.
Magnetic Circuit
REDCATT engineers have developed an efficient, ferrite based magnetic circuit, capable of delivering the highest level of performance providing a consistent, high integrity magnetic flux gap, low distortion characteristic. The magnetic circuit design is optimized to generate the minimum amount of flux modulation, providing exceptional stability.
The 8FIND uses a lightweight carbon fiber loaded cone assembly along with a precision double roll surround. This combination provides remarkable strength, high efficiency and a excursion linearity of 9.4mm.
Magnetic Circuit
REDCATT engineers have developed an efficient, ferrite based magnetic circuit, capable of delivering the highest level of performance providing a consistent, high integrity magnetic flux gap, low distortion characteristic. The magnetic circuit design is optimized to generate the minimum amount of flux modulation, providing exceptional stability.
Specifications
General Specs
Nominal Diameter
8"
Rated Impedance
8 Ohm
Magnet
Ferrite
Basket Material
Aluminum
Power Handling
AES Power
200 W
Continuous Power
400 W
Peak Power
800 W
Voice Coil
Diameter
50.8 mm
Winding Wire
CCAW
Former
Glass Fiber
Winding Height
12.4 mm
T/S Parameters
Resonant Frequency (Fs)
70.00 Hz
Re
5.70 \u2126
Qes
0.250
Qms
6.40
Qts
0.250
Vas
18.20 liters
Sd
227.00 cm\u00B2
Mms
20.70 grams
Rms
1.42
Cms
0.2500
Bl
14.30 T\u00B7m
Le
0.480 mH
Sensitivity
97.33 dB
Design Details
Surround Material
fabric
Cone/Dome Material
Paper GF
Spider
Nomex
T-Plate
8 mm
Xmax (peak)
2.2 mm
Xmech
10.2 mm
Overall Diameter
209.50 mm
Bolt Circle Diameter
197.50 mm
Baffle Cutout Dia.
185.00 mm
Mounting Holes
8
Depth (flange to rear)
91.50 mm
Net Weight
3.73 kg
Ordering Codes
Product Code
8FINDX8-030
Downloads
Frequency Response & Impedance
2D Drawing
Technical Summary
This driver is designed for efficiency-
first applications where high sensitivity (97 dB) provides large SPL
from moderate amplifier power, rather than brute-force excursion-
limited output. In systems requiring high SPL below 80 Hz, dedicated
subwoofers should supplement this driver. The mechanical excursion
protection at 9.4mm provides substantial headroom beyond the linear
range for transient peaks.
DESIGN NOTE: The carbon fiber loaded paper cone and precision double
roll surround provide a lightweight, stiff piston with extended
frequency response. The flux-modulation-optimized ferrite motor
reduces harmonic distortion, particularly beneficial in the critical
midrange frequencies where this driver operates above its bass range.
The aluminum basket provides good thermal dissipation.
--- SUMMARY (copy/paste ready) ---
The 8FINDX8-030 is an 8-inch high-efficiency ferrite mid-woofer designed for professional two-way, multi-way, and installation loudspeaker systems where maximum sensitivity and controlled low-distortion performance are required. With a sensitivity of 97 dB (1W/1m), a 2-inch CCAW voice coil on a glass fiber former, and a lightweight carbon fiber loaded paper cone with a precision double roll fabric surround, the driver achieves a very low Qts of 0.25. 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, recommended net internal volumes range from 22 to 30 liters with tuning frequencies between 51 and 66 Hz. These volumes are larger than typical for an 8-inch driver due to the very low Qts and high Vas (18.2 liters), which is characteristic of high-efficiency pro-audio mid-woofer designs where motor control and sensitivity are prioritized. Smaller volumes (22–25 liters tuned to 58–66 Hz) maximize mid-bass output and efficiency for 2-way tops paired with subwoofers, while 30 liters tuned to 51 Hz extends the usable low-frequency response to approximately 43 Hz (–3 dB) for stand-alone applications. Port velocities are negligible across all alignments (5–6 m/s) due to the modest linear excursion (2.2 mm), making port design uncritical.
The driver is rated for approximately 200 W AES / 400 W continuous power handling and is intended for use with DSP-controlled amplification. A high-pass filter in the range of 41–56 Hz (24 dB/octave Linkwitz-Riley) is recommended depending on enclosure tuning, with a typical crossover to a high-frequency driver at 1.5–3 kHz. Below tuning frequency, excursion increases and high-pass protection is required to manage mechanical stress, particularly given the modest linear excursion capability. The driver's extreme sensitivity means high SPL is achievable with moderate amplifier power.
This driver is particularly effective in high-efficiency 2-way portable loudspeakers, compact PA tops, stage monitors, and installation systems where maximum sensitivity, extended frequency response, and low distortion are priorities. The carbon fiber loaded paper cone, flux-modulation-optimized ferrite motor, and aluminum basket provide consistent, durable performance in demanding professional environments.
first applications where high sensitivity (97 dB) provides large SPL
from moderate amplifier power, rather than brute-force excursion-
limited output. In systems requiring high SPL below 80 Hz, dedicated
subwoofers should supplement this driver. The mechanical excursion
protection at 9.4mm provides substantial headroom beyond the linear
range for transient peaks.
DESIGN NOTE: The carbon fiber loaded paper cone and precision double
roll surround provide a lightweight, stiff piston with extended
frequency response. The flux-modulation-optimized ferrite motor
reduces harmonic distortion, particularly beneficial in the critical
midrange frequencies where this driver operates above its bass range.
The aluminum basket provides good thermal dissipation.
--- SUMMARY (copy/paste ready) ---
The 8FINDX8-030 is an 8-inch high-efficiency ferrite mid-woofer designed for professional two-way, multi-way, and installation loudspeaker systems where maximum sensitivity and controlled low-distortion performance are required. With a sensitivity of 97 dB (1W/1m), a 2-inch CCAW voice coil on a glass fiber former, and a lightweight carbon fiber loaded paper cone with a precision double roll fabric surround, the driver achieves a very low Qts of 0.25. 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, recommended net internal volumes range from 22 to 30 liters with tuning frequencies between 51 and 66 Hz. These volumes are larger than typical for an 8-inch driver due to the very low Qts and high Vas (18.2 liters), which is characteristic of high-efficiency pro-audio mid-woofer designs where motor control and sensitivity are prioritized. Smaller volumes (22–25 liters tuned to 58–66 Hz) maximize mid-bass output and efficiency for 2-way tops paired with subwoofers, while 30 liters tuned to 51 Hz extends the usable low-frequency response to approximately 43 Hz (–3 dB) for stand-alone applications. Port velocities are negligible across all alignments (5–6 m/s) due to the modest linear excursion (2.2 mm), making port design uncritical.
The driver is rated for approximately 200 W AES / 400 W continuous power handling and is intended for use with DSP-controlled amplification. A high-pass filter in the range of 41–56 Hz (24 dB/octave Linkwitz-Riley) is recommended depending on enclosure tuning, with a typical crossover to a high-frequency driver at 1.5–3 kHz. Below tuning frequency, excursion increases and high-pass protection is required to manage mechanical stress, particularly given the modest linear excursion capability. The driver's extreme sensitivity means high SPL is achievable with moderate amplifier power.
This driver is particularly effective in high-efficiency 2-way portable loudspeakers, compact PA tops, stage monitors, and installation systems where maximum sensitivity, extended frequency response, and low distortion are priorities. The carbon fiber loaded paper cone, flux-modulation-optimized ferrite motor, and aluminum basket provide consistent, durable performance in demanding professional environments.
Enclosure Recommendations
ENCLOSURE RECOMMENDATIONS: 8FINDX8-030
Driver: 8FINDX8-030 (8FIND) — 8" Mid-Woofer
Key T/S: Fs=70Hz, Qts=0.25, Vas=18.2L, Sens=97.3dB 1W/1m
Power: AES 200W / Cont 400W / Peak 800W
Xmax=2.2mm (one-way linear), Xmech=10.2mm (protection at 9.4mm)
Sd=227cm², Bl=14.3T·m, Re=5.7Ω, Mms=20.7g
Voice Coil: 2" CCAW on glass fiber former (12.4mm winding height)
Magnet: Ferrite (flux-modulation optimized) | Basket: Aluminum
Cone: Carbon fiber loaded paper | Surround: Fabric (double roll)
Spider: Nomex
RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented)
NOTE: This is a very high efficiency driver (97.3 dB 1W/1m) with an
exceptionally low Qts (0.25) and strong ferrite motor (Bl=14.3 T·m),
paired with a very light carbon fiber loaded paper cone (Mms=20.7g).
The low Qts and high Vas-to-size ratio (18.2L for an 8") produce
optimal vented alignments in larger-than-typical enclosures for the
speaker size (22–30L). This is characteristic of high-efficiency
pro-audio mid-woofers where sensitivity and motor control are
prioritized over excursion-limited maximum output. The modest Xmax
(2.2mm linear) results in extremely low port velocities across all
alignments — port design is uncritical.
PORT RECOMMENDATION: Round port (65mm diameter) — port lengths are
very short (56–83mm) due to the high tuning frequencies relative to
cabinet volume. Port velocities are negligible (5–6 m/s). A single
65mm round port is more than adequate. Flaring is optional but not
required at these velocities.
VENTED ALIGNMENTS:
a) VENTED — High SPL
Net Volume: 22 liters
Tuning (Fb): 66 Hz
Est. -3dB: 56 Hz
HP Filter: 56 Hz (24dB/oct LR recommended)
Round Port: 65mm dia × 56mm long
Slot Port: 148mm W × 40mm H × 105mm L
Port Velocity: 6.2 m/s
Notes: Smaller alignment with higher tuning for maximum
mid-bass efficiency and output. The tight coupling between
driver and port provides strong output in the 60–200 Hz
region with excellent transient response. Ideal for compact
2-way tops and stage monitors paired with subwoofers, where
the extreme sensitivity (97+ dB) maximizes system headroom.
b) VENTED — Balanced Response
Net Volume: 25 liters
Tuning (Fb): 58 Hz
Est. -3dB: 49 Hz
HP Filter: 48 Hz (24dB/oct LR recommended)
Round Port: 65mm dia × 70mm long
Slot Port: 148mm W × 40mm H × 131mm L
Port Velocity: 5.5 m/s
Notes: General-purpose alignment with good balance between
low-frequency extension and output capability. Provides
even response through the bass region. Well-suited for
2-way PA tops, multi-way systems, and installation
loudspeakers where the system either operates with a
subwoofer or needs moderate stand-alone bass coverage.
c) VENTED — Extended Low Frequency
Net Volume: 30 liters
Tuning (Fb): 51 Hz
Est. -3dB: 43 Hz
HP Filter: 41 Hz (24dB/oct LR recommended)
Round Port: 65mm dia × 79mm long
Slot Port: 148mm W × 40mm H × 147mm L
Port Velocity: 4.8 m/s
Notes: Maximum low-frequency extension for stand-alone use
without subwoofers. The larger cabinet allows the driver to
reach into the low 40s Hz while maintaining the high motor
control characteristic of the low Qts design. Requires
proper high-pass protection below tuning. Best for
applications where deep bass reach and high efficiency are
both required from a single 8" system.
VOLUME NOTE: The recommended volumes (22–30L) are larger than typical
for an 8" driver because of the very low Qts (0.25) and large Vas
(18.2L). This is normal for high-efficiency pro-audio mid-woofers —
comparable professional designs (e.g., premium 8" 2-way tops from
major manufacturers) commonly use 15–30L net internal volumes for
drivers in this Qts/Vas class. The strong motor demands adequate air
volume for proper port loading and controlled low-frequency behavior.
EXCURSION NOTE: The linear Xmax of 2.2mm limits maximum acoustic
output at low frequencies.
Frequently Asked Questions
- - EXTENDED FREQUENCY RESPONSE, high efficiency
- - Carbon fiber loaded and reinforced paper cone
- - Nomex spider
ENCLOSURE RECOMMENDATIONS: 8FINDX8-030 Driver: 8FINDX8-030 (8FIND) — 8" Mid-Woofer Key T/S: Fs=70Hz, Qts=0.25, Vas=18.2L, Sens=97.3dB 1W/1m Power: AES 200W / Cont 400W / Peak 800W Xmax=2.2mm (one-way linear), Xmech=10.2mm (protection at 9.4mm) Sd=227cm², Bl=14.3T·m, Re=5.7Ω, Mms=20.7g Voice Coil: 2" CCAW on glass fiber former (12.4mm winding height) Magnet: Ferrite (flux-modulation optimized) | Basket: Aluminum Cone: Carbon fiber loaded paper | Surround: Fabric (double roll) Spider: Nomex RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented) NOTE: This is a very high efficiency driver (97.3 dB 1W/1m) with an exceptionally low Qts (0.25) and strong ferrite motor (Bl=14.3 T·m), paired with a very light carbon fiber loaded paper cone (Mms=20.7g). The low Qts and high Vas-to-size ratio (18.2L for an 8") produce optimal vented alignments in larger-than-typical enclosures for the speaker size (22–30L). This is characteristic of high-efficiency pro-audio mid-woofers where sensitivity and motor control are prioritized over excursion-limited maximum output. The modest Xmax (2.2mm linear) results in extremely low port velocities across all alignments — port design is uncritical. PORT RECOMMENDATION: Round port (65mm diameter) — port lengths are very short (56–83mm) due to the high tuning frequencies relative to cabinet volume. Port velocities are negligible (5–6 m/s). A single 65mm round port is more than adequate. Flaring is optional but not required at these velocities. VENTED ALIGNMENTS:...
This driver is designed for efficiency-
first applications where high sensitivity (97 dB) provides large SPL
from moderate amplifier power, rather than brute-force excursion-
limited output. In systems requiring high SPL below 80 Hz, dedicated
subwoofers should supplement this driver. The mechanical excursion
protection at 9.4mm provides substantial headroom beyond the linear
range for transient peaks.
DESIGN NOTE: The carbon fiber loaded paper cone and precision double
roll surround provide a lightweight, stiff piston with extended
frequency response. The flux-modulation-optimized ferrite motor
reduces harmonic distortion, particularly beneficial in the critical
midrange frequencies where this driver operates above its bass range.
The aluminum basket provides good thermal dissipation.
--- SUMMARY (copy/paste ready) ---
The 8FINDX8-030 is an 8-inch high-efficiency ferrite mid-woofer designed for professional two-way, multi-way, and installation loudspeaker systems where maximum sensitivity and controlled low-distortion performance are required. With a sensitivity of 97 dB (1W/1m), a 2-inch CCAW voice coil on a glass fiber former, and a lightweight carbon fiber loaded paper cone with a precision double roll fabric surround, the driver achieves a very low Qts of 0.25. 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, recommended net internal volumes range from 22 to 30 liters with tuning frequencies between 51 and 66 Hz. These volumes are larger than typical for an 8-inch driver due to the very low Qts and high Vas (18.2 liters), which is characteristic of high-efficiency pro-audio mid-woofer designs where motor control and sensitivity are prioritized. Smaller volumes (22–25 liters tuned to 58–66 Hz) maximize mid-bass output and efficiency for 2-way tops paired with subwoofers, while 30 liters tuned to 51 Hz extends the usable low-frequency response to approximately 43 Hz (–3 dB) for stand-alone applications. Port velocities are negligible across all alignments (5–6 m/s) due to the modest linear excursion (2.2 mm), making port design uncritical.
The driver is rated for approximately 200 W AES / 400 W continuous power handling and is intended for use with DSP-controlled amplification. A high-pass filter in the range of 41–56 Hz (24 dB/octave Linkwitz-Riley) is recommended depending on enclosure tuning, with a typical crossover to a high-frequency driver at 1.5–3 kHz. Below tuning frequency, excursion increases and high-pass protection is required to manage mechanical stress, particularly given the modest linear excursion capability. The driver's extreme sensitivity means high SPL is achievable with moderate amplifier power.
This driver is particularly effective in high-efficiency 2-way portable loudspeakers, compact PA tops, stage monitors, and installation systems where maximum sensitivity, extended frequency response, and low distortion are priorities. The carbon fiber loaded paper cone, flux-modulation-optimized ferrite motor, and aluminum basket provide consistent, durable performance in demanding professional environments.
AES Power: 200 W,
Continuous: 400 W,
Peak: 800 W.
Sensitivity: 97.33 dB (1W/1m).
