SB AcousticsSB16PFCR25-4
£21.76 · 75% less, betterFs35 Hz +11%, worse
Qts0.34 +6%
Vas32.7 L −8%
BL5 T·m –
Xmax4.5 mm −18%, worse
Sensitivity87.6 dB +0.6
6-inch LF driver · SB17 series · 36 mm voice coil · 60 W
SB Acoustics SB17CRC35-4 4Ω
4 Ω
- Fs
- 32Hz
- Xmax
- 5.5mm
- SPL
- 87dB
- Pe
- 60W
- BL
- 5T·m
- Vd
- 65cm³
- Qts
- 0.32
- Vas
- 36L
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
30 degrees
Frequency response
240 plotted pointsMedium confidence1,433 selected pixels of 6,851
Published graphs
SB Acoustics SB17CRC35-4 is a 6-inch 4 ohm LF driver rated at 60 W RMS. The validated T/S data includes Fs 32 Hz, Qts 0.32, Vas 35.5 L, Xmax 5.5 mm, sensitivity 87 dB, plus 65 cm³ Vd and 90 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 £85.53.
The published T/S values agree with each other
Thiele/Small
- Fs
- 32Hz
- Qts
- 0.32
- Qes
- 0.35
- Qms
- 4.3
- Vas
- 35.5L
- Re
- 3.1Ω
- Le
- 0.13mH
Motor and cone
- BL
- 5T·m
- Sd
- 118cm²
- Mms
- 14g
- Xmax
- 5.5mm
- Vd †
- 65cm³
- Voice coil
- 36mm
- Flux density
- 1T
Power and response
- Sensitivity †
- 87dB
- Manufacturer sensitivity
- 90dB
- Power
- 60W
- Impedance
- 4Ω
- EBP †
- 90 · Sealed or vented
Size and mounting
- Weight
- 1.6kg
Other published values
- Cms
- 1.80mm/N
Sensitivity shows 87.0 dB, calculated from the T/S values. SB Acoustics publishes 90.0 dB, 3.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else SB Acoustics lists
LF · Primary · 6″
- BL
- 5T·m
- Fs
- 32Hz
- Le
- 0.13mH
- Re
- 3.1Ω
- Sd
- 118cm²
- Cms
- 1.80mm/N
- Mms
- 14g
- Qes
- 0.35
- Qms
- 4.3
- Qts
- 0.32
- SPL
- 87dB
- Vas
- 35.5L
- Xmax
- 5.5mm
- Power
- 60W
- Impedance
- 4Ω
- Flux density
- 1T
- Sensitivity
- 90dB
- Calculated sensitivity †
- 87dB
- Manufacturer sensitivity
- 90dB
- Voice coil
- 36mm
- Weight
- 1.6kg
02
Compare
Same-size drivers, compared with the SB17CRC35-4. Clear differences are green when better and red when worse.
This driverSB17CRC35-4
Best price
£85.53
Fs
32 Hz
Qts
0.32
Vas
35.5 L
BL
5 T·m
Xmax
5.5 mm
Sensitivity
87 dB
Power
60 W
SB AcousticsSB16PFC25-4
£23.44 · 73% less, betterFs35 Hz +11%, worse
Qts0.34 +6%
Vas32.7 L −8%
BL5 T·m –
Xmax4.5 mm −18%, worse
Sensitivity87.6 dB +0.6
SB AcousticsSB15SFCR39-4
£39.73 · 54% less, betterFs31 Hz –
Qts0.32 –
Vas49.9 L +41%, worse
BL6.9 T·m +38%, better
Xmax5.5 mm –
Sensitivity88.4 dB +1.4
SB AcousticsSB16PFC25-4-COAX
£47.68 · 44% less, betterFs36 Hz +14%, worse
Qts0.31 −3%
Vas31.3 L −12%, better
BL5.1 T·m –
Xmax4.7 mm −15%, worse
Sensitivity88.2 dB +1.2
SB AcousticsSB16PFCR25-4-COAX
£49.62 · 42% less, betterFs36 Hz +14%, worse
Qts0.31 −3%
Vas31.3 L −12%, better
BL5.1 T·m –
Xmax4.7 mm −15%, worse
Sensitivity88.2 dB +1.2
SB AcousticsSB15NRXC30-8
£54.13 · 37% less, betterFs38 Hz +21%, worse
Qts0.33 +3%
Vas20.7 L −42%, better
BL5.6 T·m +12%, better
Xmax5 mm −9%
Sensitivity87.1 dB –
SB AcousticsSB17MFC35-4
£54.89 · 36% less, betterFs30 Hz −5%
Qts0.28 −12%, better
Vas45 L +27%, worse
BL4.9 T·m –
Xmax5.5 mm –
Sensitivity88.1 dB +1.1
SB AcousticsSB17MFC35-8
£54.89 · 36% less, betterFs33 Hz +5%
Qts0.37 +16%, worse
Vas39 L +10%
BL5.9 T·m +18%, better
Xmax5.5 mm –
Sensitivity87.5 dB +0.5
SB AcousticsSB17NRX2C35-4
£55.41 · 35% less, betterFs36 Hz +14%, worse
Qts0.37 +16%, worse
Vas27.6 L −22%, better
BL4.9 T·m –
Xmax5.5 mm –
Sensitivity87 dB –
SB AcousticsSB17NRXC35-4
£58.18 · 32% less, betterFs35 Hz +11%, worse
Qts0.32 –
Vas35.2 L –
BL4.8 T·m −4%
Xmax5.5 mm –
Sensitivity88.5 dB +1.5
SB AcousticsSB17NRXC35-8
£58.60 · 31% less, betterFs32 Hz –
Qts0.34 +6%
Vas44.5 L +25%, worse
BL5.9 T·m +18%, better
Xmax5.5 mm –
Sensitivity88.1 dB +1.1
HiViE6.5
£63.57 · 26% less, betterFs37 Hz +17%, worse
Qts0.32 –
Vas31 L −13%, better
BL8.1 T·m +62%, better
Xmax5.8 mm +5%
Sensitivity88.3 dB +1.3
SB AcousticsSB17NBAC35-4
£65.93 · 23% less, betterFs30 Hz −5%
Qts0.29 −9%
Vas42.6 L +20%, worse
BL4.9 T·m –
Xmax5.5 mm –
Sensitivity87.7 dB +0.7
SB AcousticsSB17NBAC35-8
£65.93 · 23% less, betterFs32 Hz –
Qts0.35 +9%
Vas45 L +27%, worse
BL5.9 T·m +18%, better
Xmax5.5 mm –
Sensitivity87.7 dB +0.7
SB AcousticsSB15NAC30-4
£69.45 · 19% less, betterFs35 Hz +11%, worse
Qts0.30 −6%
Vas18.3 L −48%, better
BL4.8 T·m −4%
Xmax5 mm −9%
Sensitivity85.9 dB −1.1
SB AcousticsSB17NAC35-4
£71.13 · 17% less, betterFs32 Hz –
Qts0.32 –
Vas33 L −7%
BL5.2 T·m +4%
Xmax5.5 mm –
Sensitivity87.1 dB –
SB AcousticsSB15CAC30-4
£76.56 · 10% less, betterFs33 Hz +3%
Qts0.31 −3%
Vas20.2 L −43%, better
BL4.6 T·m −8%
Xmax5 mm −9%
Sensitivity85.1 dB −1.9
SB AcousticsSB15CRC30-4
£81.08 · 5% less, betterFs37 Hz +17%, worse
Qts0.32 –
Vas17.3 L −51%, better
BL4.5 T·m −9%
Xmax5.5 mm –
Sensitivity85.9 dB −1.1
SB AcousticsSB17CAC35-4
£82.13 · 4% lessFs30 Hz −6%
Qts0.29 −9%
Vas37.8 L +6%
BL5.3 T·m +6%
Xmax5.5 mm –
Sensitivity87 dB –
SB AcousticsSB17CRC35-8
£85.53 · Same priceFs28 Hz −11%, better
Qts0.34 +6%
Vas48 L +35%, worse
BL6 T·m +20%, better
Xmax5.5 mm –
Sensitivity86.6 dB –
SEASH1215-08 CA18RNX
£101.94 · 19% more, worseFs35 Hz +11%, worse
Qts0.31 −3%
Vas33 L −7%
BL7.2 T·m +44%, better
Xmax6 mm +9%
Sensitivity87.9 dB +0.9
CIAREHWG160
£102.15 · 19% more, worseFs39 Hz +24%, worse
Qts0.33 +3%
Vas27 L −24%, better
BL5.6 T·m +12%, better
Xmax6.5 mm +18%, better
Sensitivity88.6 dB +1.6
SEASH1456-08 ER18RNX
£109.29 · 28% more, worseFs37 Hz +17%, worse
Qts0.32 –
Vas32 L −10%
BL7.2 T·m +44%, better
Xmax6 mm +9%
Sensitivity88.2 dB +1.2
Tang BandW5-1880
£209.33 · 145% more, worseFs48 Hz +52%, worse
Qts0.32 –
Vas26.5 L −25%, better
BL5.5 T·m +9%
Xmax5 mm −9%
Sensitivity90.9 dB +3.9, better
SB AcousticsMW13TX-8
£225.24 · 163% more, worseFs40 Hz +27%, worse
Qts0.32 –
Vas14.8 L −58%, better
BL5.7 T·m +14%, better
Xmax5 mm −9%
Sensitivity86.5 dB −0.5
SB AcousticsMW16PF-4
No current priceFs28 Hz −11%, better
Qts0.33 +3%
Vas49 L +38%, worse
BL4.7 T·m −6%
Xmax5.5 mm –
Sensitivity86.9 dB –
WavecorWF182BD10
No current priceFs29 Hz −10%
Qts0.31 −3%
Vas32.4 L −9%
BL6.5 T·m +30%, better
Xmax5.5 mm –
Sensitivity85.7 dB −1.3
WavecorWF182BD18
No current priceFs29 Hz −10%
Qts0.31 −3%
Vas32.4 L −9%
BL6.5 T·m +30%, better
Xmax5.5 mm –
Sensitivity85.7 dB −1.3
Audio Technology15 J 52 15 06 SD
No current priceFs45 Hz +43%, worse
Qts0.32 –
Vas15 L −58%, better
BL5.5 T·m +10%, better
Xmax5.2 mm −5%
Sensitivity87.7 dB +0.7
SB AcousticsSB17BAC35-8-COAX
No current priceFs35 Hz +12%, worse
Qts0.33 +3%
Vas33.1 L −7%
BL5.7 T·m +14%, better
Xmax3.1 mm −44%, worse
Sensitivity88.1 dB +1.1
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 53 ratings · Checked 24 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 |
|---|---|---|---|---|
Lean Audio | £85.53, the lowest price | 2 in stock | Visit shop at Lean Audio | |
Lean Business | £85.53 | Stock not listed | Visit shop at Lean Business | |
Willys-Hifi | £102.44 | 20% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
Hifisound Import VAT and duty may apply · under 7 working days | £87.46 | 2.3% above the lowest price | Back order (under 7 working days) | Visit shop at Hifisound |
SoundImports Import VAT and duty may apply | £92.06 | 7.6% above the lowest price | 6 in stock | Visit shop at SoundImports |
RumoH Import VAT and duty may apply | £97.97 | 15% above the lowest price | Stock not listed | Visit shop at RumoH |
Best price over time
Tracked since 1 Apr
Recent changes
- 1 OctWillys-Hifi£104.95 → £102.44Down 2.4% from £104.95
- 15 AugWillys-Hifi£105.95 → £104.95Down 0.9% from £105.95
- 14 AugWillys-Hifi£104.95 → £105.95Up 1.0% from £104.95