SB AcousticsSB13PFC25-8
£23.27 · 58% less, betterFs45 Hz +18%, worse
Qts0.33 –
Vas13.4 L −35%, better
BL6.2 T·m +11%, better
Xmax4.5 mm −10%, worse
Sensitivity87 dB –
5-inch LF driver · SB15 series · 31 mm voice coil · 50 W
SB Acoustics SB15NRXC30-8 8Ω
8 Ω
£54.80
5.5%RumoH · Ships from Netherlands · All 2 offers
- Fs
- 38Hz
- Xmax
- 5mm
- SPL
- 87dB
- Pe
- 50W
- BL
- 5.6T·m
- Vd
- 41cm³
- Qts
- 0.33
- Vas
- 21L
Published graphs
SB Acoustics SB15NRXC30-8 is a 5-inch 8 ohm LF driver rated at 50 W RMS. The validated T/S data includes Fs 38 Hz, Qts 0.33, Vas 20.7 L, Xmax 5 mm, sensitivity 87.1 dB, plus 41 cm³ Vd and 109 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 £54.80.
The published T/S values agree with each other
Thiele/Small
- Fs
- 38Hz
- Qts
- 0.33
- Qes
- 0.35
- Qms
- 4.8
- Vas
- 20.7L
- Re
- 5.7Ω
- Le
- 0.14mH
Motor and cone
- BL
- 5.6T·m
- Sd
- 82cm²
- Mms
- 8g
- Xmax
- 5mm
- Vd †
- 41cm³
- Voice coil
- 31mm
- Flux density
- 1T
Power and response
- Sensitivity †
- 87.1dB
- Manufacturer sensitivity
- 88dB
- Power
- 50W
- Impedance
- 8Ω
- EBP †
- 109 · Leans vented
Size and mounting
- Weight
- 1.5kg
Other published values
- Cms
- 2.17mm/N
† Calculated by bits from the published values
What this validation status means
Everything else SB Acoustics lists
LF · Primary · 5″
- BL
- 5.6T·m
- Fs
- 38Hz
- Le
- 0.14mH
- Re
- 5.7Ω
- Sd
- 82cm²
- Cms
- 2.17mm/N
- Mms
- 8g
- Qes
- 0.35
- Qms
- 4.8
- Qts
- 0.33
- SPL
- 87.1dB
- Vas
- 20.7L
- Xmax
- 5mm
- Power
- 50W
- Impedance
- 8Ω
- Flux density
- 1T
- Sensitivity
- 88dB
- Calculated sensitivity †
- 87.1dB
- Manufacturer sensitivity
- 88dB
- Voice coil
- 31mm
- Weight
- 1.5kg
02
Compare
Same-size drivers, compared with the SB15NRXC30-8. Clear differences are green when better and red when worse.
This driverSB15NRXC30-8
Best price
£54.80
Fs
38 Hz
Qts
0.33
Vas
20.7 L
BL
5.6 T·m
Xmax
5 mm
Sensitivity
87.1 dB
Power
50 W
SB AcousticsSB13PFC25-4
£23.27 · 58% less, betterFs44 Hz +16%, worse
Qts0.29 −12%, better
Vas13.4 L −35%, better
BL5.3 T·m −5%
Xmax4.5 mm −10%, worse
Sensitivity87.4 dB –
CIAREHW100
£27.97 · 49% less, betterFs70 Hz +84%, worse
Qts0.31 −6%
Vas4.3 L −79%, better
BL5.6 T·m –
Xmax4.3 mm −14%, worse
Sensitivity88 dB +0.9
Eighteen Sound5W430
£44.95 · 18% less, betterFs52 Hz +37%, worse
Qts0.32 −3%
Vas15 L −28%, better
BL6.3 T·m +13%, better
Xmax6 mm +20%, better
Sensitivity89.7 dB +2.6, better
Dayton AudioRS150-8
£45.37 · 17% less, betterFs48 Hz +26%, worse
Qts0.34 +3%
Vas16.6 L −20%, better
BL5.6 T·m –
Xmax4 mm −20%, worse
Sensitivity88.3 dB +1.2
MonacorSPH-130
£47.38 · 14% less, betterFs38 Hz –
Qts0.32 −3%
Vas22 L +6%
BL5.4 T·m −4%
Xmax2 mm −60%, worse
Sensitivity86.9 dB –
SB AcousticsSB16PFC25-4-COAX
£48.27 · 12% less, betterFs36 Hz −5%
Qts0.31 −6%
Vas31.3 L +51%, worse
BL5.1 T·m −9%
Xmax4.7 mm −7%
Sensitivity88.2 dB +1.1
SB AcousticsSB15NRX2C30-8
£49.12 · 10% less, betterFs37 Hz −4%
Qts0.34 +3%
Vas20 L −3%
BL5.8 T·m –
Xmax10 mm +100%, better
Sensitivity86.2 dB −0.9
SB AcousticsSB16PFCR25-4-COAX
£49.62 · 9% less, betterFs36 Hz −5%
Qts0.31 −6%
Vas31.3 L +51%, worse
BL5.1 T·m −9%
Xmax4.7 mm −7%
Sensitivity88.2 dB +1.1
SB AcousticsSB15NRXC30-4
£54.80 · Same priceFs41 Hz +8%
Qts0.29 −12%, better
Vas16.7 L −19%, better
BL4.7 T·m −16%, worse
Xmax5 mm –
Sensitivity87.7 dB +0.6
Dayton AudioRS150P-8A
£58.74 · 7% more, worseFs47 Hz +24%, worse
Qts0.34 +3%
Vas16.7 L −19%, better
BL5.6 T·m –
Xmax4 mm −20%, worse
Sensitivity88.1 dB +1
SB AcousticsSB17NRXC35-8
£59.32 · 8% more, worseFs32 Hz −16%, better
Qts0.34 +3%
Vas44.5 L +115%, worse
BL5.9 T·m +5%
Xmax5.5 mm +10%, better
Sensitivity88.1 dB +1
SB AcousticsSB15NAC30-8
£70.31 · 28% more, worseFs36 Hz −7%
Qts0.37 +12%, worse
Vas17.7 L −14%, better
BL5.9 T·m +5%
Xmax5 mm –
Sensitivity85.1 dB −2, worse
SB AcousticsSB15NAC30-4
£70.31 · 28% more, worseFs35 Hz −8%
Qts0.30 −9%
Vas18.3 L −12%, better
BL4.8 T·m −14%, worse
Xmax5 mm –
Sensitivity85.9 dB −1.2
SB AcousticsSB17NAC35-4
£72.00 · 31% more, worseFs32 Hz −16%, better
Qts0.32 −3%
Vas33 L +59%, worse
BL5.2 T·m −7%
Xmax5.5 mm +10%, better
Sensitivity87.1 dB –
SEASH1455-08 ER15RLY
£81.26 · 48% more, worseFs44 Hz +16%, worse
Qts0.32 −3%
Vas15 L −28%, better
BL5.5 T·m –
Xmax5 mm –
Sensitivity87 dB –
SEASH1216-08 CA15RLY
£90.51 · 65% more, worseFs44 Hz +16%, worse
Qts0.34 +3%
Vas14 L −32%, better
BL5.5 T·m –
Xmax5 mm –
Sensitivity86.6 dB −0.5
WavecorWF152BD13
£99.09 · 81% more, worseFs50 Hz +32%, worse
Qts0.33 –
Vas9.2 L −56%, better
BL6.3 T·m +13%, better
Xmax4.5 mm −10%, worse
Sensitivity87.3 dB –
£102.27 · 87% more, worse
Fs36 Hz −5%
Qts0.32 −3%
Vas25 L +21%, worse
BL6.3 T·m +13%, better
Xmax4 mm −20%, worse
Sensitivity86.9 dB –
WavecorWF152BD09
£111.20 · 103% more, worseFs52 Hz +37%, worse
Qts0.34 +3%
Vas8.6 L −58%, better
BL5.8 T·m +4%
Xmax4.5 mm −10%, worse
Sensitivity87.4 dB –
WavecorWF152BD03
£144.52 · 164% more, worseFs56 Hz +46%, worse
Qts0.35 +6%
Vas9.2 L −56%, better
BL5.8 T·m +4%
Xmax4.5 mm −10%, worse
Sensitivity88.4 dB +1.3
Scanspeak15W/4531G00
£169.48 · 209% more, worseFs40 Hz +5%
Qts0.32 −3%
Vas15.8 L −24%, better
BL5.7 T·m –
Xmax6.5 mm +30%, better
Sensitivity86.8 dB –
Tang BandW5-1880
£211.90 · 287% more, worseFs48 Hz +26%, worse
Qts0.32 −3%
Vas26.5 L +28%, worse
BL5.5 T·m –
Xmax5 mm –
Sensitivity90.9 dB +3.8, better
SB AcousticsMW13TX-8
£228.00 · 316% more, worseFs40 Hz +5%
Qts0.32 −3%
Vas14.8 L −29%, better
BL5.7 T·m –
Xmax10 mm +100%, better
Sensitivity86.5 dB −0.6
Audio Technology15 J 52 15 06 SD
No current priceFs45 Hz +18%, worse
Qts0.32 −3%
Vas15 L −28%, better
BL5.5 T·m –
Xmax5.2 mm +4%
Sensitivity87.7 dB +0.6
WavecorWF152BD10
No current priceFs49 Hz +29%, worse
Qts0.32 −3%
Vas9.6 L −54%, better
BL5.8 T·m +4%
Xmax4.5 mm −10%, worse
Sensitivity87.4 dB –
WavecorWF152BD05
No current priceFs50 Hz +32%, worse
Qts0.33 –
Vas9.2 L −56%, better
BL6.3 T·m +13%, better
Xmax4.5 mm −10%, worse
Sensitivity87.3 dB –
SB AcousticsMW16PF-4
No current priceFs28 Hz −26%, better
Qts0.33 –
Vas49 L +137%, worse
BL4.7 T·m −16%, worse
Xmax5.5 mm +10%, better
Sensitivity86.9 dB –
No current price
Fs37 Hz –
Qts0.33 –
Vas15 L −28%, better
BL5.3 T·m −5%
Xmax7 mm +40%, better
Sensitivity85 dB −2.1, worse
CIAREHWL100
No current priceFs70 Hz +84%, worse
Qts0.31 −6%
Vas4.3 L −79%, better
BL5.6 T·m –
Xmax4.3 mm −14%, worse
Sensitivity88 dB +0.9
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 12 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 |
|---|---|---|---|---|
RumoH Import VAT and duty may apply | £54.80, the lowest price | Stock not listed | Visit shop at RumoH | |
SoundImports Import VAT and duty may apply | £58.02 | 5.9% above the lowest price | 1 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr