Celestion FTR15-3070C 15" Professional Cast Frame Speaker 400W

Brand:| Model: FTR15-3070C
Celestion has used its vast experience to minimize the effects of power compression on the FTR15-3070C 15" speaker, while at the same time achieving high efficiency and extremely low distortion.
  • Features 400 watts RMS power handling and 99 dB sensitivity
  • 3" high temperature Inside/Outside voice coil efficiently dissipates heat, preventing sensitivity loss
  • Flexirol™ surround for greater excursion control
  • Saturated gap technology for lower harmonic distortion
  • Low frequency response, down to 40 Hz
  • Smart chassis design minimizes acoustic distortion
Part # 
Weight: 17.25 lbs.  
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Part # 294-2004
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Product Details

Celestion FTR15-3070C 15" Professional Cast Frame Speaker 400W

The Celestion FTR15-3070C 15" pro speaker combines high efficiency with smooth response, backed up by superb reliability. Celestion's expert engineering ensures every operating parameter has been completely optimized, which guarantees faultless performance -- even under the stressful conditions found in pro audio environments. The FTR15-3070C features an Inside/Outside voice coil that is wound on a nearly indestructible fiberglass former. Winding the coil on both sides of the former ensures the stress of thermal expansion is canceled by the opposing masses of copper wire. Accurate and durable, the FTR15-3070C will provide excellent service in direct radiator and horn-loaded applications.

Product Specifications
  • Nominal Diameter15"
  • Power Handling (RMS)400 Watts
  • Power Handling (max)800 Watts
  • Impedance8 ohms
  • Frequency Response40 to 4,000 Hz
  • Sensitivity99 dB 1W/1m
  • Voice Coil Diameter3"
  • Magnet Weight81 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)40 Hz
  • DC Resistance (Re)6.5 ohms
  • Voice Coil Inductance (Le)0.59 mH
  • Mechanical Q (Qms)7.1
  • Electromagnetic Q (Qes)0.38
  • Total Q (Qts)0.36
  • Compliance Equivalent Volume (Vas)7.34 ft.³
  • BL Product (BL)18.7 Tm
  • Moving Mass Of Diaphragm (Mmd)2.47
  • Maximum Linear Excursion (Xmax)10 mm
Materials of Construction
  • Cone MaterialPaper / Glass Fiber
  • Surround MaterialCloth
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerFiberglass
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter15.16"
  • Baffle Cutout Diameter13.82"
  • Depth6.22"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume1.79 ft.³
  • Sealed F389 Hz
  • Vented Volume4.11 ft.³
  • Vented F351 Hz
Celestion FTR15-3070C 15" Professional Cast Frame Speaker 400W
  • BrandCelestion
  • ModelFTR15-3070C
  • Part Number294-2004
  • UPC739894538756
  • Product CategoryWoofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Weight17.25 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Celestion FTR15-3070C 15" Professional Cast Frame Speaker 400W

Product Q&A

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who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
Celestion FTR15-3070C 15" Professional Cast Frame Speaker 400W

i was just recently using my QSC's and out of no where one subwoofer stopped working. the tweeter works, everything seems to work but i really don't know what happened to the speaker. sense is not ripped. or show any damage at all.

Asked by: djrikko
Please call or email our tech support for further help with this matter. 800-338-0531 x1 or tech@parts-express.com.
Answered by: MattP
Date published: 2014-04-22

Would the FTR15-3070c work best in the mid or bass compartment?

Replacing speakers in my JBL JRX125's. One cab is definately louder when I sweep from left to right. Should I have concerns over the cross over? If not, I would move one OEM spkr. over & put one Celestion spkr in ea. cab., as I'm on a budget. Would the Celestions work best in the bass or mid compartment? (The horn drivers were just replaced & sounded identical.)
Asked by: Bassman5000
Ideally, you would rebuild the entire cabinet[s]. But if you are replacing woofers, put these in the bass compartment. Inspect your cross-over componentry if you suspect one is damaged. You would need to consider changing the cross-overs only if the speaker impedance changes from 8 to 4 ohm, say.
Answered by: Fanden
Date published: 2012-02-14

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