CelestionTF1220
£63.48 · 24% less, betterFs56 Hz –
Qts0.39 +5%
Vas72.8 L +8%
BL13.9 T·m –
Xmax4 mm −11%, worse
Sensitivity96.6 dB –
12-inch LF driver · TF1225 series · 64 mm voice coil · 250 W
Celestion TF1225 8Ω
8 Ω · 50–4000 Hz
£83.50
4.4%Lean Business · All 4 offers
- Fs
- 56Hz
- Xmax
- 4.5mm
- SPL
- 96dB
- Pe
- 250W
- BL
- 14.3T·m
- Vd
- 239cm³
- Qts
- 0.37
- Vas
- 67L
Manufacturer response and impedance data, with source and trace details below. The left and right arrow keys read every shown curve at a frequency, a twelfth of an octave at a time, or an octave with Shift. Escape clears the reading.
Curve provenanceInspect 1 trace
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
LF frequency response
Frequency response
137 plotted pointsMedium confidence199 selected pixels of 362
Published graphs
Celestion TF1225 is a 12-inch 8 ohm LF driver rated at 250 W RMS. The validated T/S data includes Fs 56 Hz, Qts 0.37, Vas 67.3 L, Xmax 4.5 mm, sensitivity 96.4 dB, plus 239 cm³ Vd and 132 EBP. bits tracks UK, EU and US shop prices, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £83.50.
The published T/S values agree with each other
Thiele/Small
- Fs
- 56Hz
- Qts
- 0.37
- Qes
- 0.42
- Qms
- 3.1
- Vas
- 67.3L
- Re
- 5.1Ω
- Le
- 0.86mH
Motor and cone
- BL
- 14.3T·m
- Sd
- 531cm²
- Mms
- 49g
- Xmax
- 4.5mm
- Vd †
- 239cm³
- Voice coil
- 64mm
Power and response
- Sensitivity †
- 96.4dB
- Manufacturer sensitivity
- 97dB
- Power
- 250W
- Impedance
- 8Ω
- Range
- 50–4000Hz
- EBP †
- 132 · Leans vented
Size and mounting
- Diameter
- 309mm
- Cutout
- 283mm
- Bolt circle
- 297mm
- Depth
- 130mm
- Weight
- 4.1kg
Other published values
- Cms
- 0.17mm/N
- Rms
- 5.45kg/s
- Power Program
- 500
† Calculated by bits from the published values
What this validation status means
Everything else Celestion lists
LF · Primary · 12″
- BL
- 14.3T·m
- Fs
- 56Hz
- Le
- 0.86mH
- Re
- 5.1Ω
- Sd
- 531cm²
- Cms
- 0.17mm/N
- Mms
- 49g
- Qes
- 0.42
- Qms
- 3.1
- Qts
- 0.37
- Rms
- 5.45kg/s
- SPL
- 96.4dB
- Vas
- 67.3L
- Xmax
- 4.5mm
- Power
- 250W
- Impedance
- 8Ω
- Sensitivity
- 97dB
- Low limit
- 50Hz
- Power Program
- 500
- Calculated sensitivity †
- 96.4dB
- High limit
- 4000Hz
- Manufacturer sensitivity
- 97dB
- Voice coil
- 64mm
- Weight
- 4.1kg
- Diameter
- 309mm
- Depth
- 130mm
- Cutout
- 283mm
- Bolt circle
- 297mm
02
Compare
Same-size drivers, compared with the TF1225. Clear differences are green when better and red when worse.
This driverTF1225
Best price
£83.50
Fs
56 Hz
Qts
0.37
Vas
67.3 L
BL
14.3 T·m
Xmax
4.5 mm
Sensitivity
96.4 dB
Power
250 W
PRV Audio12W750A
£63.52 · 24% less, betterFs60 Hz +8%
Qts0.43 +16%, worse
Vas81 L +20%, worse
BL14.3 T·m –
Xmax3.6 mm −20%, worse
Sensitivity98 dB +1.6
£72.00 · 14% less, better
Fs47 Hz −15%, better
Qts0.40 +8%
Vas80 L +19%, worse
BL15.6 T·m +9%
Xmax5 mm +11%, better
Sensitivity94.9 dB −1.5
CelestionTF1230S
£85.00 · 2% moreFs60 Hz +8%
Qts0.37 –
Vas54.4 L −19%, better
BL16.6 T·m +16%, better
Xmax4.5 mm –
Sensitivity96.5 dB –
CIAREFXI12
£96.29 · 15% more, worseFs55 Hz –
Qts0.44 +19%, worse
Vas70 L +4%
BL13.9 T·m –
Xmax5 mm +11%, better
Sensitivity95.8 dB −0.6
LavoceWSN122.50
£99.64 · 19% more, worseFs53 Hz −5%
Qts0.36 –
Vas69.4 L +3%
BL15.8 T·m +11%, better
Xmax4.7 mm +4%
Sensitivity96.3 dB –
EminenceDELTA-12LFA
£104.72 · 25% more, worseFs51 Hz −8%
Qts0.47 +27%, worse
Vas67.9 L –
BL14.1 T·m –
Xmax4.8 mm +7%
Sensitivity94.5 dB −1.9
CIAREPWA12.64
£114.71 · 37% more, worseFs55 Hz –
Qts0.35 −5%
Vas58 L −14%, better
BL17.6 T·m +23%, better
Xmax4.5 mm –
Sensitivity96.3 dB –
FaitalPRO12PR310
£135.00 · 62% more, worseFs54 Hz –
Qts0.40 +8%
Vas73.5 L +9%
BL14.4 T·m –
Xmax4.9 mm +9%
Sensitivity96.5 dB –
FaitalPRO12PR300
£135.81 · 63% more, worseFs50 Hz −10%, better
Qts0.36 –
Vas92.6 L +38%, worse
BL14.1 T·m –
Xmax4.9 mm +9%
Sensitivity97 dB +0.6
Sica12 PF 3
£166.62 · 100% more, worseFs47 Hz −15%, better
Qts0.39 +5%
Vas76.5 L +14%, worse
BL15.4 T·m +7%
Xmax5.5 mm +22%, better
Sensitivity94.8 dB −1.6
LavoceCAF123.00T
£257.89 · 209% more, worseFs53 Hz −5%
Qts0.36 –
Vas71.4 L +6%
BL15.2 T·m +6%
Xmax6 mm +33%, better
Sensitivity96.4 dB –
LavoceCAF123.00TH
£268.19 · 221% more, worseFs53 Hz −5%
Qts0.36 –
Vas71.4 L +6%
BL15.2 T·m +6%
Xmax6 mm +33%, better
Sensitivity96.4 dB –
B&C12FHX76
£291.66 · 249% more, worseFs48 Hz −14%, better
Qts0.33 −11%, better
Vas88 L +31%, worse
BL14.4 T·m –
Xmax4 mm −11%, worse
Sensitivity96.3 dB –
B&C12FCX76
£294.14 · 252% more, worseFs47 Hz −15%, better
Qts0.34 −8%
Vas82 L +22%, worse
BL15.6 T·m +9%
Xmax5 mm +11%, better
Sensitivity95.9 dB −0.5
FaitalPRO12HX240
£325.71 · 290% more, worseFs56 Hz –
Qts0.37 –
Vas61.1 L −9%
BL16 T·m +12%, better
Xmax7.4 mm +64%, better
Sensitivity96.5 dB –
Oberton12CX1
No current priceFs58 Hz +4%
Qts0.37 –
Vas68.5 L –
BL13.9 T·m –
Xmax4.3 mm −6%
Sensitivity97.2 dB +0.8
P.Audio12NT-76MB
No current priceFs55 Hz –
Qts0.36 –
Vas71.6 L +6%
BL17.4 T·m +22%, better
Xmax4.5 mm –
Sensitivity97.1 dB +0.7
EminenceFS12.30A8
No current priceFs55 Hz –
Qts0.36 –
Vas61 L −9%
BL17 T·m +19%, better
Xmax4.3 mm −4%
Sensitivity96.3 dB –
P.Audio12BM-500B
No current priceFs52 Hz −6%
Qts0.35 −5%
Vas69.8 L +4%
BL16.6 T·m +16%, better
Xmax4.8 mm +7%
Sensitivity96.3 dB –
Sica12 L1 2.5 SL
No current priceFs48 Hz −15%, better
Qts0.36 –
Vas81.8 L +22%, worse
BL14.2 T·m –
Xmax3.7 mm −18%, worse
Sensitivity95.7 dB −0.7
CelestionTF1225CX
No current priceFs64 Hz +14%, worse
Qts0.36 −3%
Vas45.1 L −33%, better
BL17.5 T·m +22%, better
Xmax4.5 mm –
Sensitivity96.6 dB –
P.AudioEX12-500S
No current priceFs56 Hz –
Qts0.40 +8%
Vas54.5 L −19%, better
BL16.3 T·m +14%, better
Xmax3.9 mm −13%, worse
Sensitivity95.5 dB −0.9
Sica12 C 2 CP
No current priceFs58 Hz +5%
Qts0.45 +22%, worse
Vas74.3 L +10%, worse
BL13.7 T·m −4%
Xmax4.5 mm –
Sensitivity96.8 dB –
P.Audio12BMA-500B
No current priceFs57 Hz –
Qts0.34 −8%
Vas61.4 L −9%
BL16.7 T·m +17%, better
Xmax5 mm +11%, better
Sensitivity97 dB +0.6
P.Audio12BM-300B-V3
No current priceFs55 Hz –
Qts0.34 −8%
Vas62.4 L −7%
BL17.1 T·m +19%, better
Xmax3.9 mm −13%, worse
Sensitivity96.6 dB –
P.Audio12BM-400B
No current priceFs55 Hz –
Qts0.34 −8%
Vas62.4 L −7%
BL17.1 T·m +19%, better
Xmax3.9 mm −13%, worse
Sensitivity96.6 dB –
REDCATT121XR
No current priceFs46 Hz −17%, better
Qts0.33 −11%, better
Vas69.1 L –
BL16 T·m +12%, better
Xmax6.3 mm +41%, better
Sensitivity94.1 dB −2.3, worse
P.Audio12FT-88MB
No current priceFs48 Hz −14%, better
Qts0.37 –
Vas45.4 L −33%, better
BL19.1 T·m +33%, better
Xmax4.7 mm +4%
Sensitivity93.1 dB −3.3, worse
No photo
PHL Audio4511
No current priceFs48 Hz −14%, better
Qts0.40 +8%
Vas74.1 L +10%, worse
BL15.1 T·m +5%
Xmax7 mm +56%, better
Sensitivity94.6 dB −1.8
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Thomann4.8 out of 512 ratings · Checked 26 Oct 2026Read reviews on Thomann
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Lean Business | £83.50, the lowest price | Stock not listed | Visit shop at Lean Business | |
Lean Audio | £80.00 | Back order | Visit shop at Lean Audio | |
Thomann | £86.00 | 3.0% above the lowest price | In stock | Visit shop at Thomann |
Thomann | £98.00 | 17% above the lowest price | In stock | Visit shop at Thomann |
Best price over time
Tracked since 1 Apr
Recent changes
- 20 OctThomann£106.00 → £98.00Down 7.5% from £106.00
- 19 OctThomann£95.00 → £106.00Up 12% from £95.00
- 16 OctThomann£93.00 → £95.00Up 2.2% from £93.00