SB AcousticsSB13PFCR25-4-COAX
£44.29 · 70% less, betterFs43 Hz +54%, worse
Qts0.27 –
Vas14.4 L −71%, better
BL5.1 T·m –
Xmax4.7 mm −22%, worse
Sensitivity87.8 dB –
6-inch LF driver · MW16 series · 36 mm voice coil · 60 W
SB Acoustics MW16P-4 4Ω
4 Ω
£148.20
9.4%Falcon Acoustics · In stock · All 6 offers
- Fs
- 28Hz
- Xmax
- 6mm
- SPL
- 88dB
- Pe
- 60W
- BL
- 5.2T·m
- Vd
- 71cm³
- Qts
- 0.27
- Vas
- 50L
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 3 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
30 degrees
Frequency response
240 plotted pointsMedium confidence1,192 selected pixels of 1,923 - Trace datasheet-response-trace-poc/v1
60 degrees
Frequency response
219 plotted pointsMedium confidence947 selected pixels of 2,229 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence2,387 selected pixels of 4,573
Published graphs
SB Acoustics MW16P-4 is a 6-inch 4 ohm LF driver rated at 60 W RMS. The validated T/S data includes Fs 28 Hz, Qts 0.27, Vas 50.2 L, Xmax 6 mm, sensitivity 88 dB, plus 71 cm³ Vd and 100 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 £146.49.
The published T/S values agree with each other
Thiele/Small
- Fs
- 28Hz
- Qts
- 0.27
- Qes
- 0.28
- Qms
- 5
- Vas
- 50.2L
- Re
- 3.4Ω
- Le
- 0.15mH
Motor and cone
- BL
- 5.2T·m
- Sd
- 119cm²
- Mms
- 13g
- Xmax
- 6mm
- Vd †
- 71cm³
- Voice coil
- 36mm
- Flux density
- 1.17T
Power and response
- Sensitivity †
- 88dB
- Manufacturer sensitivity
- 90.5dB
- Power
- 60W
- Impedance
- 4Ω
- EBP †
- 100 · Sealed or vented
Size and mounting
- Weight
- 1.0kg
Other published values
- Cms
- 2.50mm/N
Sensitivity shows 88.0 dB, calculated from the T/S values. SB Acoustics publishes 90.5 dB, 2.5 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else SB Acoustics lists
LF · Primary · 6″
- BL
- 5.2T·m
- Fs
- 28Hz
- Le
- 0.15mH
- Re
- 3.4Ω
- Sd
- 119cm²
- Cms
- 2.50mm/N
- Mms
- 13g
- Qes
- 0.28
- Qms
- 5
- Qts
- 0.27
- SPL
- 88dB
- Vas
- 50.2L
- Xmax
- 6mm
- Power
- 60W
- Impedance
- 4Ω
- Flux density
- 1.17T
- Sensitivity
- 90.5dB
- Calculated sensitivity †
- 88dB
- Manufacturer sensitivity
- 90.5dB
- Voice coil
- 36mm
- Weight
- 1.0kg
02
Compare
Same-size drivers, compared with the MW16P-4. Clear differences are green when better and red when worse.
This driverMW16P-4
Best price
£146.49
Fs
28 Hz
Qts
0.27
Vas
50.2 L
BL
5.2 T·m
Xmax
6 mm
Sensitivity
88 dB
Power
60 W
SB AcousticsSB13PFC25-4-COAX
£46.01 · 69% less, betterFs43 Hz +54%, worse
Qts0.27 –
Vas14.4 L −71%, better
BL5.1 T·m –
Xmax4.7 mm −22%, worse
Sensitivity87.8 dB –
SB AcousticsSB15MFC30-4
£48.66 · 67% less, betterFs36 Hz +27%, worse
Qts0.28 +4%
Vas19.4 L −61%, better
BL4.8 T·m −8%
Xmax5 mm −17%, worse
Sensitivity86.6 dB −1.4
SB AcousticsSB15NRX2C30-4
£49.12 · 66% less, betterFs35 Hz +23%, worse
Qts0.28 +4%
Vas20.5 L −59%, better
BL4.7 T·m −10%
Xmax5 mm −17%, worse
Sensitivity86.5 dB −1.5
SB AcousticsSB17MFC35-4
£54.89 · 63% less, betterFs30 Hz +7%
Qts0.28 +4%
Vas45 L −10%, better
BL4.9 T·m −6%
Xmax5.5 mm −8%
Sensitivity88.1 dB –
SB AcousticsSB17NBAC35-4
£65.93 · 55% less, betterFs30 Hz +7%
Qts0.29 +7%
Vas42.6 L −15%, better
BL4.9 T·m −6%
Xmax5.5 mm −8%
Sensitivity87.7 dB –
SB AcousticsSB17NAC35-4
£71.13 · 51% less, betterFs32 Hz +14%, worse
Qts0.32 +19%, worse
Vas33 L −34%, better
BL5.2 T·m –
Xmax5.5 mm −8%
Sensitivity87.1 dB −0.9
SB AcousticsSB17CAC35-4
£82.13 · 44% less, betterFs30 Hz +5%
Qts0.29 +7%
Vas37.8 L −25%, better
BL5.3 T·m –
Xmax5.5 mm −8%
Sensitivity87 dB −1
FaitalPRO6RS140
£84.31 · 42% less, betterFs65 Hz +132%, worse
Qts0.27 –
Vas9.3 L −81%, better
BL11 T·m +112%, better
Xmax5.6 mm −7%
Sensitivity91.6 dB +3.6, better
SB AcousticsMW13P-4
£139.69 · 5% lessFs41 Hz +46%, worse
Qts0.27 –
Vas14.6 L −71%, better
BL4.9 T·m −6%
Xmax5 mm −17%, worse
Sensitivity87.4 dB −0.6
SB AcousticsMW13PNW-4
£139.69 · 5% lessFs41 Hz +46%, worse
Qts0.27 –
Vas14.6 L −71%, better
BL4.9 T·m −6%
Xmax5 mm −17%, worse
Sensitivity87.4 dB −0.6
Scanspeak18W/8545K00
£144.00 · 2% lessFs28 Hz –
Qts0.28 +4%
Vas46.4 L −8%
BL8.2 T·m +58%, better
Xmax6.5 mm +8%
Sensitivity87.3 dB −0.7
SB AcousticsMW16P-8
£145.30 · Same priceFs29 Hz +4%
Qts0.33 +22%, worse
Vas48 L −4%
BL6.3 T·m +21%, better
Xmax6 mm –
Sensitivity87.3 dB −0.7
SB AcousticsMW16PNW-8
£146.49 · Same priceFs29 Hz +4%
Qts0.32 +19%, worse
Vas49.9 L –
BL6.3 T·m +21%, better
Xmax6 mm –
Sensitivity87.6 dB –
SB AcousticsMW16PNW-4
£148.32 · 1% moreFs28 Hz –
Qts0.27 –
Vas51.8 L +3%
BL5 T·m −4%
Xmax6 mm –
Sensitivity88 dB –
SB AcousticsMR16P-4
£159.05 · 9% more, worseFs31 Hz +11%, worse
Qts0.25 −7%
Vas47.2 L −6%
BL5.2 T·m –
Xmax3.1 mm −48%, worse
Sensitivity89.4 dB +1.4
SB AcousticsMR16PNW-4
£159.05 · 9% more, worseFs31 Hz +11%, worse
Qts0.25 −7%
Vas47.2 L −6%
BL5.2 T·m –
Xmax3.1 mm −48%, worse
Sensitivity89.4 dB +1.4
SB AcousticsMW19P-4
£165.40 · 13% more, worseFs29 Hz +4%
Qts0.24 −11%, better
Vas61 L +22%, worse
BL6.5 T·m +25%, better
Xmax6.8 mm +13%, better
Sensitivity89.6 dB +1.6
SB AcousticsMW19PNW-4
£168.40 · 15% more, worseFs29 Hz +4%
Qts0.24 −11%, better
Vas61 L +22%, worse
BL6.5 T·m +25%, better
Xmax6.8 mm +13%, better
Sensitivity89.6 dB +1.6
VoltBM165.1
£172.80 · 18% more, worseFs30 Hz +7%
Qts0.24 −11%, better
Vas40.8 L −19%, better
BL9.8 T·m +88%, better
Xmax6.3 mm +5%
Sensitivity88.3 dB –
SB AcousticsMW13TX-4
£225.24 · 54% more, worseFs38 Hz +36%, worse
Qts0.26 −4%
Vas16 L −68%, better
BL5 T·m −4%
Xmax5 mm −17%, worse
Sensitivity87.2 dB −0.8
SB AcousticsMW16TX-4
£250.36 · 71% more, worseFs29 Hz +4%
Qts0.27 –
Vas48 L −4%
BL5.2 T·m –
Xmax6 mm –
Sensitivity88.1 dB –
SB AcousticsMW16TX-8
£250.36 · 71% more, worseFs29 Hz +5%
Qts0.33 +22%, worse
Vas48 L −4%
BL6.3 T·m +21%, better
Xmax6 mm –
Sensitivity87.4 dB −0.6
SB AcousticsMR13TX-4
£251.15 · 71% more, worseFs44 Hz +57%, worse
Qts0.27 –
Vas12.2 L −76%, better
BL4.9 T·m −6%
Xmax3 mm −50%, worse
Sensitivity87.7 dB –
SB AcousticsMW19TX-4
£283.85 · 94% more, worseFs32 Hz +14%, worse
Qts0.27 –
Vas53.2 L +6%
BL6.3 T·m +21%, better
Xmax6.8 mm +13%, better
Sensitivity90 dB +2, better
SB AcousticsMW19PF-4
No current priceFs29 Hz +4%
Qts0.27 –
Vas62.7 L +25%, worse
BL6.1 T·m +17%, better
Xmax6.5 mm +8%
Sensitivity89.4 dB +1.4
PurifiPTT6.5W04-NFA-06
No current priceFs32 Hz +14%, worse
Qts0.26 −4%
Vas28.3 L −44%, better
BL7.6 T·m +46%, better
Xmax5.9 mm –
Sensitivity87.2 dB −0.8
Audio Technology5 H 52 17 06 SD
No current priceFs36 Hz +29%, worse
Qts0.28 +4%
Vas34 L −32%, better
BL6.6 T·m +27%, better
Xmax6.3 mm +5%
Sensitivity88.8 dB +0.8
SB AcousticsMW16PF-4
No current priceFs28 Hz –
Qts0.33 +22%, worse
Vas49 L –
BL4.7 T·m −10%
Xmax5.5 mm −8%
Sensitivity86.9 dB −1.1
WavecorWF182BD04
No current priceFs34 Hz +21%, worse
Qts0.25 −7%
Vas32.4 L −35%, better
BL6.8 T·m +30%, better
Xmax5.5 mm −8%
Sensitivity88.9 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 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 |
|---|---|---|---|---|
Falcon Acoustics | £148.20, the lowest price | In stock | Visit shop at Falcon Acoustics | |
Lean Audio | £145.30 | Back order | Visit shop at Lean Audio | |
Willys-Hifi | £163.63 | 10% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
SoundImports Import VAT and duty may apply | £146.49 | 12 in stock | Visit shop at SoundImports | |
RumoH Import VAT and duty may apply | £154.44 | 4.2% above the lowest price | In stock | Visit shop at RumoH |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£167.95 → £163.63Down 2.6% from £167.95
- 28 SepWillys-Hifi£166.95 → £167.95Up 0.6% from £166.95
- 23 SepWillys-Hifi£167.95 → £166.95Down 0.6% from £167.95