======================================================================

PRODUCT CODE: 8FINDX8-030

======================================================================

--- 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. 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.

──────────────────────────────────────────────────────────────────────