Celestion TF1225
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Manufacturer Information
Celestion
https://www.celestion.com
info@celestion.com
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Algam SAS
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Celestion TF1225, the pro audio DNA of a reference brand
Famous for its guitar amplifier speakers, Celestion has also been designing transducers dedicated to sound reinforcement for decades. The TF series continues this tradition: reliable and high-performance models designed to equip numerous professional speaker cabinets. The TF1225 is a cornerstone, combining mechanical strength and sonic coherence.
Who is it for and what are the uses?
The TF1225 is aimed at contractors, venues, musicians, and audio DIYers looking for a versatile 12-inch speaker for replacement or custom speaker builds. It is suitable for compact stage monitors, 2-way tops with compression drivers, as well as full-range cabinets requiring a punchy and clear woofer/midrange.
Design and sonic strengths
The stamped steel frame provides rigidity and operational stability, while the ferrite magnet ensures reliable and consistent performance over time. This robust mechanical base contributes to a powerful sound output without sacrificing tonal balance, with a usable frequency range from 50 Hz to 4 kHz, perfectly exploitable in 2-way systems.
Thanks to its 97 dB sensitivity and nominal 8 ohm impedance, the TF1225 integrates easily into most 12-inch speaker cabinets on the market. Its 400 W power handling allows it to withstand regular stage use while maintaining satisfying midrange detail.
Technical specifications
| Cabinet impedance (Ω) | 8 Ω | Chassis | steel |
| Speaker diameter | 12" | Coil diameter | 2.5 mm |
| Frequency response | 50 Hz - 4 kHz | Depth | 130 mm |
| Sensitivity | 97 | Power output | 400 W |
| Category | loudspeaker | Weight | 4.1 kg |
| Magnet | Ferrite | ||
| Brand | Celestion | Voice coil diameter | 2.50 mm |
| Series | TF | Nominal impedance | 8 ohms |
| Diameter | 12 inches | Power handling | 400 W |
| Frame | stamped steel | ||
Questions frequently asked
Is the Celestion TF1225 suitable for a 2-way speaker cabinet?
Its frequency response from 50 Hz to 4 kHz allows use in a 2-way head combined with a compression driver. Its role is to reproduce the bass and midrange.
What is the impedance of this 12-inch speaker?
The nominal impedance is 8 ohms, for integration into speaker setups designed for this value.
What is the power handling capacity of the TF1225?
The rated power is 400 W. A sensitivity of 97 dB accompanies this capacity, with an efficiency level suitable for sound reinforcement. The desired behavior remains clear in the midrange during regular stage use.
Can it replace a stage monitor speaker?
This model is suitable for replacing a 12-inch driver in a compact stage monitor, provided mechanical and electrical compatibility with the cabinet. Its 12-inch diameter and 8-ohm impedance are the key references to check.
What type of magnet and frame does this model have?
A ferrite magnet is combined with a stamped steel frame. The entire assembly weighs 4.1 kg.



