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REDCATT 121FINDX4 12″ Bass-mid woofer 4 ohms
€56.95
The REDCATT 121FINDX4 is a 12″ 4 ohm bass-mid woofer for efficient professional loudspeaker builds, combining extended frequency response, strong power handling and weather-resistant construction.
Available on backorder
Highlights of the REDCATT 121FINDX4
- 12″ bass-mid woofer with 4 ohm rated impedance
- 96.40 dB sensitivity for high-output loudspeaker designs
- 250 W AES, 500 W continuous and 1000 W peak power handling
- Ferrite magnet, steel basket and 50.8 mm voice coil
- Nomex spider and treated paper cone for stability in demanding environments
- Recommended for 2-way applications requiring excellent midrange response
Product details REDCATT 121FINDX4
REDCATT 121FINDX4 12″ Ferrite Paper Bass-Mid Woofer 4 Ohm
The REDCATT 121FINDX4 is designed as a high-efficiency bass-mid woofer for professional loudspeaker engineering. With 96.40 dB sensitivity and a linear frequency response, it is well suited to 2-way systems where clear midrange output and usable low-frequency extension are both required.
Its construction combines a ferrite magnet, steel basket and 50.8 mm CCAW voice coil on a glass fiber former. The lightweight paper GF cone is controlled by an “M” shaped fabric surround, while the Nomex spider supports pistonic behavior and long-term mechanical stability. Treated cone materials and coated metal parts help the driver withstand high humidity and harsh environments.
For woofers used in bass reflex cabinets, the 121FINDX4 offers several practical enclosure alignments. A 35 liter cabinet tuned to 62 Hz is the balanced general-purpose recommendation, with an approximate -3 dB point of 57 Hz and a 52 Hz high-pass filter. Alternatives include 30 liters tuned to 68 Hz for strong mid-bass output or 40 liters tuned to 56 Hz for extended low-frequency response with suitable high-pass protection.
The driver’s key parameters include Fs of 59.00 Hz, Qts of 0.520, Vas of 59.10 liters and Re of 3.10 ohms. Installation dimensions include a 282.00 mm baffle cutout, 302.00 mm bolt circle, 124.00 mm mounting depth and 8 mounting holes, making it a practical choice for custom professional audio components and weather-resistant speaker cabinet projects.
Specifications
| Article number | 121FINDX4 |
| EAN | 9506911651221 |
| Woofer Type | Mid-Woofer |
| Nominal Diameter | 12" | 300 mm |
| Power Handling (RMS) | 250 Watt |
| Power Handling (max) | 1000 Watt |
| Continuous Program Power | 1000 Watt |
| Impedance (Z) | 4 Ω |
| Sensitivity (SPL at 1m / 2.83V) | 96.40 dB |
| Voice Coil Diameter | 50.8 mm |
| DC Resistance (Re) | 3.1 Ω |
| Voice Coil Inductance (Le) | 0.32 mH |
| Resonant Frequency (Fs) | 59 Hz |
| Mechanical Q (Qms) | 7.34 |
| Electromagnetic Q (Qes) | 0.56 |
| Total Q (Qts) | 0.52 |
| Diaphragm Mass Inc. Airload (Mms) | 49.1 g |
| Mechanical Compliance of Suspension (Cms) | 1.5 mm/N |
| Surface Area of Cone (Sd) | 531 cm² |
| BL Product (BL) | 10.2 Tm |
| Compliance Equivalent Volume (Vas) | 59.1 L |
| Maximum Linear Excursion (Xmax) | 1.85 mm |
| Driver's Mechanical Losses (Rms) | 2.48 kg/s |
| Cone / Diaphragm Material | Paper |
| Surround Material | Fabric |
| Voice Coil Wire Material | CCAW |
| Voice Coil Former | Glass Fiber |
| Basket / Frame Material | Steel |
| Magnet Material | Ferrite |
| Overall Outside Diameter | 320 mm |
| Overall Depth | 124 mm |
| Baffle Cutout Diameter | 282 mm |
| Bolt Circle Diameter | 302 mm |
| # Mounting Holes | 8 |
| Article number | 121FINDX4 |
| EAN | 9506911651221 |
| Woofer Type | Mid-Woofer |
|---|---|
| Nominal Diameter | 12″ | 300 mm |
| Power Handling (RMS) | 250 Watt |
| Power Handling (max) | 1000 Watt |
| Continuous Program Power | 1000 Watt |
| Impedance (Z) | 4 Ω |
| Sensitivity (SPL at 1m / 2.83V) | 96.40 dB |
| Voice Coil Diameter | 50.8 mm |
| DC Resistance (Re) | 3.1 Ω |
| Voice Coil Inductance (Le) | 0.32 mH |
| Resonant Frequency (Fs) | 59 Hz |
| Mechanical Q (Qms) | 7.34 |
| Electromagnetic Q (Qes) | 0.56 |
| Total Q (Qts) | 0.52 |
| Diaphragm Mass Inc. Airload (Mms) | 49.1 g |
| Mechanical Compliance of Suspension (Cms) | 1.5 mm/N |
| Surface Area of Cone (Sd) | 531 cm² |
| BL Product (BL) | 10.2 Tm |
| Compliance Equivalent Volume (Vas) | 59.1 L |
| Maximum Linear Excursion (Xmax) | 1.85 mm |
| Driver's Mechanical Losses (Rms) | 2.48 kg/s |
| Cone / Diaphragm Material | Paper |
| Surround Material | Fabric |
| Voice Coil Wire Material | CCAW |
| Voice Coil Former | Glass Fiber |
| Basket / Frame Material | Steel |
| Magnet Material | Ferrite |
| Overall Outside Diameter | 320 mm |
| Overall Depth | 124 mm |
| Baffle Cutout Diameter | 282 mm |
| Bolt Circle Diameter | 302 mm |
| # Mounting Holes | 8 |
