SB AudienceROSSO-12MW300
£106.55 · 82% less, betterFs48 Hz +109%, worse
Qts0.27 +4%
Vas85.9 L −17%, better
BL17.4 T·m +45%, better
Xmax6.7 mm −5%
Sensitivity97.3 dB +8.6, better
12-inch LF driver · Revelator series · 75 mm voice coil · 200 W
Scanspeak 28W/4878T01 4Ω
4 Ω
£623.94
Falcon Acoustics · In stock · All 2 offers
- Fs
- 23Hz
- Xmax
- 7mm
- SPL
- 89dB
- Pe
- 200W
- BL
- 12T·m
- Vd
- 254cm³
- Qts
- 0.26
- Vas
- 104L
Scanspeak 28W/4878T01 is a 12-inch 4 ohm LF driver rated at 200 W RMS. The validated T/S data includes Fs 23 Hz, Qts 0.26, Vas 104 L, Xmax 7 mm, sensitivity 88.7 dB, plus 254 cm³ Vd and 85 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 £586.08.
The published T/S values agree with each other
Thiele/Small
- Fs
- 23Hz
- Qts
- 0.26
- Qes
- 0.27
- Qms
- 6.2
- Vas
- 104L
- Re
- 3.1Ω
- Le
- 0.50mH
Motor and cone
- BL
- 12T·m
- Sd
- 363cm²
- Mms
- 86g
- Xmax
- 7mm
- Vd †
- 254cm³
- Voice coil
- 75mm
Power and response
- Sensitivity †
- 88.7dB
- Manufacturer sensitivity
- 91dB
- Power
- 200W
- Impedance
- 4Ω
- Min. impedance
- 4Ω
- EBP †
- 85 · Sealed or vented
Size and mounting
- Diameter
- 280mm
Other published values
- Cms
- 0.56mm/N
- Rms
- 2kg/s
- Xmech
- 28
- Power Peak
- 500
Sensitivity shows 88.7 dB, calculated from the T/S values. Scanspeak publishes 91.0 dB, 2.3 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Scanspeak lists
LF · Primary · 12″
- BL
- 12T·m
- Fs
- 23Hz
- Le
- 0.50mH
- Re
- 3.1Ω
- Sd
- 363cm²
- Cms
- 0.56mm/N
- Mms
- 86g
- Qes
- 0.27
- Qms
- 6.2
- Qts
- 0.26
- Rms
- 2kg/s
- SPL
- 88.7dB
- Vas
- 104L
- Xmax
- 7mm
- Xmech
- 28
- Power
- 200W
- Impedance
- 4Ω
- Power Peak
- 500
- Sensitivity
- 91dB
- Calculated sensitivity †
- 88.7dB
- Manufacturer sensitivity
- 91dB
- Min. impedance
- 4Ω
- Voice coil
- 75mm
- Diameter
- 280mm
02
Compare
Same-size drivers, compared with the 28W/4878T01. Clear differences are green when better and red when worse.
This driver28W/4878T01
Best price
£586.08
Fs
23 Hz
Qts
0.26
Vas
104 L
BL
12 T·m
Xmax
7 mm
Sensitivity
88.7 dB
Power
200 W
RCFLF12G301
£109.81 · 81% less, betterFs43 Hz +87%, worse
Qts0.22 −15%, better
Vas97 L −7%
BL19 T·m +58%, better
Xmax7 mm –
Sensitivity97.3 dB +8.6, better
EminenceKAPPA-12A
£119.68 · 80% less, betterFs45 Hz +96%, worse
Qts0.27 +4%
Vas112.1 L +8%
BL15.2 T·m +27%, better
Xmax3.2 mm −54%, worse
Sensitivity97.6 dB +8.9, better
Beyma12WR400
£142.43 · 76% less, betterFs42 Hz +83%, worse
Qts0.27 +4%
Vas91 L −13%, better
BL18 T·m +50%, better
Xmax6.3 mm −10%, worse
Sensitivity95.8 dB +7.1, better
LavoceWAN123.00
£163.28 · 72% less, betterFs49 Hz +113%, worse
Qts0.27 +4%
Vas68.8 L −34%, better
BL17.9 T·m +49%, better
Xmax6.9 mm –
Sensitivity96.6 dB +7.9, better
Eighteen Sound12W750
£166.62 · 72% less, betterFs55 Hz +139%, worse
Qts0.27 +4%
Vas58 L −44%, better
BL15.5 T·m +29%, better
Xmax7 mm –
Sensitivity97.4 dB +8.7, better
Beyma12MCB700
£174.16 · 70% less, betterFs51 Hz +122%, worse
Qts0.27 +4%
Vas59.5 L −43%, better
BL20.4 T·m +70%, better
Xmax7 mm –
Sensitivity96.4 dB +7.7, better
FaitalPRO12FH530
£175.00 · 70% less, betterFs45 Hz +96%, worse
Qts0.26 –
Vas74.1 L −29%, better
BL18.9 T·m +57%, better
Xmax7.5 mm +7%
Sensitivity96 dB +7.3, better
FaitalPRO12FH510
£185.88 · 68% less, betterFs45 Hz +96%, worse
Qts0.25 −4%
Vas75.2 L −28%, better
BL16.3 T·m +36%, better
Xmax7.5 mm +7%
Sensitivity96.2 dB +7.5, better
RCFMB12X351
£187.93 · 68% less, betterFs55 Hz +139%, worse
Qts0.26 –
Vas46 L −56%, better
BL22.5 T·m +88%, better
Xmax7 mm –
Sensitivity96.6 dB +7.9, better
Eighteen Sound12NMB420
£187.96 · 68% less, betterFs53 Hz +130%, worse
Qts0.28 +8%
Vas105 L –
BL13.9 T·m +16%, better
Xmax4 mm −43%, worse
Sensitivity99.2 dB +10.5, better
FaitalPRO12FH520
£192.23 · 67% less, betterFs50 Hz +117%, worse
Qts0.27 +4%
Vas65.5 L −37%, better
BL15.3 T·m +28%, better
Xmax7 mm –
Sensitivity96.7 dB +8, better
Beyma12MC700ND
£209.29 · 64% less, betterFs51 Hz +122%, worse
Qts0.24 −8%
Vas58 L −44%, better
BL21.6 T·m +80%, better
Xmax7 mm –
Sensitivity96.7 dB +8, better
Eighteen Sound12NDA520
£230.40 · 61% less, betterFs50 Hz +117%, worse
Qts0.27 +4%
Vas111 L +7%
BL14.4 T·m +20%, better
Xmax4 mm −43%, worse
Sensitivity99 dB +10.3, better
Eighteen Sound12ND830
£240.31 · 59% less, betterFs58 Hz +152%, worse
Qts0.24 −8%
Vas63 L −39%, better
BL13.7 T·m +14%, better
Xmax6.5 mm −7%
Sensitivity98.9 dB +10.2, better
Beyma12CXA400ND
£349.99 · 40% less, betterFs45 Hz +96%, worse
Qts0.25 −4%
Vas88.5 L −15%, better
BL21.4 T·m +78%, better
Xmax6 mm −14%, worse
Sensitivity96.9 dB +8.2, better
Scanspeak32W/4878T01
£586.08 · Same priceFs23 Hz –
Qts0.28 +8%
Vas170 L +63%, worse
BL13 T·m +8%
Xmax7 mm –
Sensitivity90.4 dB +1.7
PRV Audio12MB1000FT-4
No current priceFs46 Hz +99%, worse
Qts0.27 +4%
Vas95.5 L −8%
BL14.5 T·m +21%, better
Xmax6.1 mm −12%, worse
Sensitivity97.1 dB +8.4, better
Acoustic EleganceTD12M-4
No current priceFs38 Hz +66%, worse
Qts0.25 −4%
Vas140 L +35%, worse
BL11.9 T·m –
Xmax6 mm −14%, worse
Sensitivity96.3 dB +7.6, better
REDCATT123FPM
No current priceFs45 Hz +96%, worse
Qts0.27 +4%
Vas98.5 L −5%
BL12.8 T·m +7%
Xmax2.8 mm −61%, worse
Sensitivity96.9 dB +8.2, better
CelestionFTR12-4075F
No current priceFs37 Hz +61%, worse
Qts0.27 +5%
Vas89.2 L −14%, better
BL12.6 T·m +5%
Xmax9 mm +29%, better
Sensitivity94 dB +5.3, better
LavoceNBASS12-30
No current priceFs46 Hz +100%, worse
Qts0.26 –
Vas68.6 L −34%, better
BL19.5 T·m +63%, better
Xmax6.6 mm −6%
Sensitivity96 dB +7.3, better
Beyma12CXA400FE
No current priceFs42 Hz +83%, worse
Qts0.25 −4%
Vas94 L −10%
BL19.8 T·m +65%, better
Xmax6 mm −14%, worse
Sensitivity96.3 dB +7.6, better
Sica12 K 4 PL
No current priceFs49 Hz +111%, worse
Qts0.25 −4%
Vas47.4 L −54%, better
BL22.9 T·m +90%, better
Xmax7 mm –
Sensitivity95 dB +6.3, better
Oberton12B401
No current priceFs47 Hz +103%, worse
Qts0.24 −6%
Vas69.6 L −33%, better
BL19.9 T·m +66%, better
Xmax6.8 mm −4%
Sensitivity96.5 dB +7.8, better
RCFLF12G801
No current priceFs43 Hz +87%, worse
Qts0.22 −15%, better
Vas97 L −7%
BL19 T·m +58%, better
Xmax7 mm –
Sensitivity97.3 dB +8.6, better
RCFLF12P901
No current priceFs43 Hz +87%, worse
Qts0.22 −15%, better
Vas97 L −7%
BL19 T·m +58%, better
Xmax7 mm –
Sensitivity97.3 dB +8.6, better
Oberton12MB35
No current priceFs51 Hz +124%, worse
Qts0.27 –
Vas50.1 L −52%, better
BL20.5 T·m +71%, better
Xmax6.8 mm −4%
Sensitivity96 dB +7.3, better
No photo
PHL Audio4031
No current priceFs44 Hz +91%, worse
Qts0.27 +4%
Vas70 L −33%, better
BL20.5 T·m +71%, better
Xmax7.5 mm +7%
Sensitivity95.2 dB +6.5, better
No photo
PHL Audio4031NDU
No current priceFs44 Hz +91%, worse
Qts0.27 +4%
Vas70 L −33%, better
BL20.5 T·m +71%, better
Xmax7.5 mm +7%
Sensitivity95.2 dB +6.5, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports5.0 out of 51 rating · Checked 26 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 |
|---|---|---|---|---|
Falcon Acoustics | £623.94, the lowest price | In stock | Visit shop at Falcon Acoustics | |
SoundImports Import VAT and duty may apply | £586.08 | 2 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 21 Oct