CelestionTF1220
£63.48 · 10% less, betterFs56 Hz +154%, worse
Qts0.39 −10%
Vas72.8 L −9%
BL13.9 T·m −14%, worse
Xmax4 mm −68%, worse
Sensitivity96.6 dB +12.1, better
12-inch LF driver · 51 mm voice coil · 250 W
GRS 12SW-4HE 4Ω
4 Ω · 20–500 Hz
£70.29
SteadySoundImports · 124 in stock · Ships from Netherlands · All 1 offer
- Fs
- 22Hz
- Xmax
- 12.5mm
- SPL
- 85dB
- Pe
- 250W
- BL
- 16.2T·m
- Vd
- 634cm³
- Qts
- 0.43
- Vas
- 80L
GRS 12SW-4HE is a 12-inch 4 ohm LF driver rated at 250 W RMS. The validated T/S data includes Fs 22 Hz, Qts 0.43, Vas 80.4 L, Xmax 12.5 mm, sensitivity 84.5 dB, plus 634 cm³ Vd and 46 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 £70.29.
The published T/S values agree with each other
Thiele/Small
- Fs
- 22Hz
- Qts
- 0.43
- Qes
- 0.48
- Qms
- 4.1
- Vas
- 80.4L
- Re
- 3.9Ω
- Le
- 3.50mH
Motor and cone
- BL
- 16.2T·m
- Sd
- 507cm²
- Mms
- 237g
- Xmax
- 12.5mm
- Vd †
- 634cm³
- Voice coil
- 51mm
Power and response
- Sensitivity †
- 84.5dB
- Manufacturer sensitivity
- 84.5dB
- Power
- 250W
- Impedance
- 4Ω
- Range
- 20–500Hz
- EBP †
- 46 · Leans sealed
Size and mounting
- Diameter
- 308.0mm
- Cutout
- 279.4mm
- Bolt circle
- 294.6mm
- Depth
- 160.0mm
Other published values
- Cms
- 0.22mm/N
- Power Peak
- 500
† Calculated by bits from the published values
What this validation status means
Everything else GRS lists
LF · Primary · 12″
- BL
- 16.2T·m
- Fs
- 22Hz
- Le
- 3.50mH
- Re
- 3.9Ω
- Sd
- 507cm²
- Cms
- 0.22mm/N
- Mms
- 237g
- Qes
- 0.48
- Qms
- 4.1
- Qts
- 0.43
- SPL
- 84.5dB
- Vas
- 80.4L
- Xmax
- 12.5mm
- Power
- 250W
- Impedance
- 4Ω
- Power Peak
- 500
- Sensitivity
- 84.5dB
- Low limit
- 20Hz
- Calculated sensitivity †
- 84.5dB
- High limit
- 500Hz
- Manufacturer sensitivity
- 84.5dB
- Voice coil
- 51mm
- Diameter
- 308.0mm
- Depth
- 160.0mm
- Cutout
- 279.4mm
- Bolt circle
- 294.6mm
02
Compare
Same-size drivers, compared with the 12SW-4HE. Clear differences are green when better and red when worse.
This driver12SW-4HE
Best price
£70.29
Fs
22 Hz
Qts
0.43
Vas
80.4 L
BL
16.2 T·m
Xmax
12.5 mm
Sensitivity
84.5 dB
Power
250 W
PRV Audio12W750A
£63.52 · 10% less, betterFs60 Hz +172%, worse
Qts0.43 –
Vas81 L –
BL14.3 T·m −12%, worse
Xmax3.6 mm −71%, worse
Sensitivity98 dB +13.5, better
CelestionK12H-100TC
£69.50 · 1% lessFs56 Hz +153%, worse
Qts0.40 −7%
Vas72.0 L −10%, better
BL13.6 T·m −16%, worse
Xmax3 mm −76%, worse
Sensitivity96.2 dB +11.7, better
PeerlessFSL-1225R02-08
£71.81 · 2% moreFs63 Hz +186%, worse
Qts0.44 –
Vas54.8 L −32%, better
BL14.9 T·m −8%
Xmax5.3 mm −58%, worse
Sensitivity96.5 dB +12, better
£72.00 · 2% more
Fs47 Hz +114%, worse
Qts0.40 −7%
Vas80 L –
BL15.6 T·m −4%
Xmax5 mm −60%, worse
Sensitivity94.9 dB +10.4, better
EminenceDELTA-12A
£98.74 · 40% more, worseFs55 Hz +150%, worse
Qts0.43 –
Vas81.3 L –
BL13.5 T·m −17%, worse
Xmax2.4 mm −81%, worse
Sensitivity96.7 dB +12.2, better
EminenceDELTA 12B
£98.74 · 40% more, worseFs58 Hz +164%, worse
Qts0.48 +12%, worse
Vas87 L +8%
BL16 T·m –
Xmax2.7 mm −78%, worse
Sensitivity97.2 dB +12.7, better
Dayton AudioDCS305-4
£116.39 · 66% more, worseFs24 Hz +10%
Qts0.40 −7%
Vas92.3 L +15%, worse
BL13.7 T·m −15%, worse
Xmax9.3 mm −26%, worse
Sensitivity86.9 dB +2.4, better
Sica12 SR 3 CP
£154.90 · 120% more, worseFs37 Hz +68%, worse
Qts0.40 −7%
Vas60.9 L −24%, better
BL16.6 T·m –
Xmax8 mm −36%, worse
Sensitivity90.3 dB +5.8, better
Sica12 PF 3
£166.62 · 137% more, worseFs47 Hz +114%, worse
Qts0.39 −9%
Vas76.5 L −5%
BL15.4 T·m −5%
Xmax5.5 mm −56%, worse
Sensitivity94.8 dB +10.3, better
LavoceCSF122.50K
£168.20 · 139% more, worseFs47 Hz +114%, worse
Qts0.42 –
Vas89.8 L +12%, worse
BL13.9 T·m −14%, worse
Xmax6.3 mm −50%, worse
Sensitivity95.2 dB +10.7, better
Sica12 SR 3 PL
£208.49 · 197% more, worseFs36 Hz +64%, worse
Qts0.42 –
Vas60.4 L −25%, better
BL17.0 T·m +5%
Xmax7 mm −44%, worse
Sensitivity90 dB +5.5, better
VisatonPAW 30 ND
£221.00 · 214% more, worseFs52 Hz +136%, worse
Qts0.46 +7%
Vas55.4 L −31%, better
BL15.4 T·m −5%
Xmax4 mm −68%, worse
Sensitivity93.9 dB +9.4, better
CelestionFTX1225
£239.00 · 240% more, worseFs47 Hz +115%, worse
Qts0.40 −8%
Vas84.6 L +5%
BL14 T·m −14%, worse
Xmax6 mm −52%, worse
Sensitivity95.1 dB +10.6, better
FaitalPRO12HX230
£250.31 · 256% more, worseFs55 Hz +150%, worse
Qts0.43 –
Vas67.7 L −16%, better
BL14.1 T·m −13%, worse
Xmax7.4 mm −41%, worse
Sensitivity95.9 dB +11.4, better
Dayton AudioRSS315HF-4
£251.11 · 257% more, worseFs24 Hz +10%
Qts0.39 −9%
Vas84.1 L +5%
BL14.0 T·m −14%, worse
Xmax14.3 mm +14%, better
Sensitivity86.3 dB +1.8
Dayton AudioRSS315HFA-8
£258.98 · 268% more, worseFs22 Hz –
Qts0.45 +5%
Vas97.2 L +21%, worse
BL18 T·m +11%, better
Xmax14.3 mm +14%, better
Sensitivity85 dB +0.5
Eighteen Sound12NLW9300
£274.84 · 291% more, worseFs47 Hz +114%, worse
Qts0.42 –
Vas56 L −30%, better
BL17 T·m +5%
Xmax8 mm −36%, worse
Sensitivity93.1 dB +8.6, better
JensenBS12N250A-8
No current priceFs47 Hz +114%, worse
Qts0.43 –
Vas81.3 L –
BL14.4 T·m −11%, worse
Xmax5.5 mm −56%, worse
Sensitivity94.8 dB +10.3, better
WavecorSW312WA03
No current priceFs28 Hz +27%, worse
Qts0.48 +12%, worse
Vas61 L −24%, better
BL14.5 T·m −10%, worse
Xmax11.5 mm −8%
Sensitivity86.3 dB +1.8
WavecorSW312WA04
No current priceFs28 Hz +27%, worse
Qts0.48 +12%, worse
Vas61 L −24%, better
BL14.5 T·m −10%, worse
Xmax11.5 mm −8%
Sensitivity86.3 dB +1.8
No photo
PHL Audio4511
No current priceFs48 Hz +118%, worse
Qts0.40 −7%
Vas74.1 L −8%
BL15.1 T·m −7%
Xmax7 mm −44%, worse
Sensitivity94.6 dB +10.1, better
Sica12 C 2 CP
No current priceFs58 Hz +165%, worse
Qts0.45 +5%
Vas74.3 L −8%
BL13.7 T·m −15%, worse
Xmax4.5 mm −64%, worse
Sensitivity96.8 dB +12.3, better
PRV Audio12W5000-2
No current priceFs87 Hz +295%, worse
Qts0.43 –
Vas11.8 L −85%, better
BL17.0 T·m +5%
Xmax10 mm −20%, worse
Sensitivity94.5 dB +10, better
CelestionFTR12-2565D
No current priceFs60 Hz +174%, worse
Qts0.42 –
Vas49.1 L −39%, better
BL15.4 T·m −5%
Xmax4 mm −68%, worse
Sensitivity95.3 dB +10.8, better
Sica12 PFS 3
No current priceFs43 Hz +95%, worse
Qts0.47 +9%
Vas58.5 L −27%, better
BL15.9 T·m –
Xmax7 mm −44%, worse
Sensitivity91.6 dB +7.1, better
LavoceFBASS12-20
No current priceFs53 Hz +141%, worse
Qts0.46 +7%
Vas75.4 L −6%
BL13.3 T·m −18%, worse
Xmax4.3 mm −66%, worse
Sensitivity95.5 dB +11, better
PRV Audio12MR1000
No current priceFs49 Hz +125%, worse
Qts0.39 −9%
Vas92.3 L +15%, worse
BL15.9 T·m –
Xmax3 mm −76%, worse
Sensitivity96.5 dB +12, better
P.AudioEX12-500S
No current priceFs56 Hz +155%, worse
Qts0.40 −7%
Vas54.5 L −32%, better
BL16.3 T·m –
Xmax3.9 mm −69%, worse
Sensitivity95.5 dB +11, better
FaneCOLOSSUS 12MBN
No current priceFs55 Hz +150%, worse
Qts0.40 −8%
Vas56 L −30%, better
BL16.6 T·m –
Xmax5.5 mm −56%, worse
Sensitivity95.3 dB +10.8, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.9 out of 546 ratings · Checked 25 Oct 2026Read reviews on SoundImports
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
SoundImports Import VAT and duty may apply | £70.29, the lowest price | 124 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr