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NEW Celestion CF1230BMB 12" Extended Excursion Midbass Driver 8 Ohm

CelestionPart # 294-1971
Model: CF1230BMB

The Celestion CF1230BMB is a 12″ bass/mid-bass driver built on a cast-aluminum chassis and ferrite magnet. This extended excursion driver offers substantial low-end throw and solid mid-bass output, making it useful for both compact subwoofer cabinets and high-efficiency two-way systems.

Key Features

  • Optimised for bass and mid-bass use
  • Half-roll elastomer surround supports increased Xmax and Xmech
  • Modified T-pole improves performance through enhanced Bl symmetry
  • Airflow-vented magnet assembly provides dynamic heat dissipation
  • Demodulation ring reduces harmonic and intermodulation distortion
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Overview

Celestion CF1230BMB 12" Extended Excursion Midbass Driver 8 Ohm

Celestion CF1230BMB 12" Extended Excursion Midbass Driver 8 Ohm

Celestion, one of the world’s leading suppliers of professional loudspeakers and compression drivers for sound reinforcement, announces the CF1230BMB, a 12" (305 mm) ferrite magnet, cast aluminum chassis professional audio driver designed for both bass and mid-bass duties. The CF1230BMB is built to deliver greater throw than typical mid-bass models, resulting in enhanced low-end performance when used in standard two-way enclosures. It also serves exceptionally well as a bass driver in compact subwoofer designs.

The Celestion CF1230BMB includes a 3” (75 mm) copper-clad aluminum voice coil that delivers a 700W continuous power rating and 96 dB sensitivity, with an operating range from 50Hz to 3,000Hz. Its elastomer surround supports a longer Xmax than a typical 12” mid-bass driver, allowing the CF1230BMB to reproduce lower frequencies more effectively. This makes it a strong choice for discreet, compact subwoofer designs. Because the driver maintains smooth performance up to 3kHz, the CF1230BMB is also an excellent option for 2-way systems with the added benefit of outstanding low frequency capability.

As well as its extended low frequency capability, the CF1230BMB includes Celestion’s smart airflow vented magnet assembly for effective heat management that helps reduce power compression, along with a modified T-pole magnet structure that improves Bl symmetry and lowers distortion. 

Developed at Celestion’s Ipswich, England headquarters, this loudspeaker was engineered using in-house FEA (Finite Element Analysis) modelling tools that enabled rapid, meaningful performance gains, resulting in longer product life and exceptionally low distortion. 

This new high-performance cast aluminum loudspeaker further reflects Celestion’s ongoing dedication to offering a broad range of high-quality solutions for sound reinforcement and professional audio applications.

Specifications

  • Nominal diameter: 305mm / 12in 
  • Power rating: 350W 
  • Continuous power rating: 700W 
  • Rated impedance: 8Ω 
  • Sensitivity: 96dB 
  • Frequency range: 50-3,000Hz 
  • Chassis type: Cast aluminum 
  • Magnet type: Ferrite 
  • Magnet weight: 2.2kg / 75oz 

  • Voice coil diameter: 75mm / 3in  
  • Voice coil material: Copper clad aluminum 
  • Former material: Fiberglass
  • Cone material: Glass loaded paper (weather-resistant) 
  • Surround material: Elastomer 
  • Suspension: Single 
  • Gap height (Hg): 8mm / 0.31in 
  • VC winding height (Hvc): 18mm / 0.7in

Frequency Response and Impedance Curves

Product Details

BrandCelestion
ModelCF1230BMB
Part Number294-1971
UPC739894664950
Unit of MeasureEach
Weight17.55

Product Specifications

Nominal Diameter12"
Power Handling (RMS)350 Watts
Power Handling (MAX)700 Watts
Impedance8Ω
Frequency Response50 to 3000Hz
Sensitivity96dB 2.83V/1m
Voice Coil Diameter3"

Thiele-Small Parameters

Resonant Frequency (Fs)43.4Hz
DC Resistance (Re)5.84Ω
Voice Coil Inductance (Le)0.713mH
Mechanical Q (Qms)4.451
Electromagnetic Q (Qes)0.417
Total Q (Qts)0.381
Compliance Equivalent Volume (Vas)2.14ft³
Mechanical Compliance of Suspension (Cms)0.152mm/N
BL Product (BL)18.38T·m
Diaphragm Mass Inc. Airload (Mms)88.41g
Maximum Linear Excursion (Xmax)7mm
Surface Area of Cone (Sd)530.93cm²

Materials of Construction

Cone MaterialPaper / Glass Fiber
Surround MaterialRubber
Voice Coil Wire MaterialCCA
Voice Coil FormerFiberglass
Basket / Frame MaterialCast Aluminum
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter12.4"
Baffle Cutout Diameter11.24"
Depth6.1"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.357ft³
Sealed F3104.9Hz
Vented Volume1.447ft³
Vented F349.84Hz

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