6-inch LF driver · SB17 series · 36 mm voice coil · 60 W

SB Acoustics SB17MFC35-4 4Ω

Name: SB Acoustics SB17MFC35-4 4 Ohm
Brand: SB Acoustics
SKU: SB17MFC35-4
Availability: InStock

4 Ω

£54.89

Steady

Lean Business · All 6 offers

Open in 00 Simulator

Fs: 30Hz
Xmax: 5.5mm
SPL: 88dB
Pe: 60W
BL: 4.9T·m
Vd: 65cm³
Qts: 0.28
Vas: 45L

See all 21 specs

Curve provenanceInspect 3 traces

These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works

30 degrees
Frequency response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence1,473 selected pixels of 2,275
Manufacturer datasheet, page 1
60 degrees
Frequency response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence882 selected pixels of 2,375
Manufacturer datasheet, page 1
impedance
Impedance response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence2,441 selected pixels of 4,579
Manufacturer datasheet, page 1

Published graphs

SB Acoustics SB17MFC35-4 manufacturer graph 1

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

SB Acoustics SB17MFC35-4 is a 6-inch 4 ohm LF driver rated at 60 W RMS. The validated T/S data includes Fs 30 Hz, Qts 0.28, Vas 45 L, Xmax 5.5 mm, sensitivity 88.1 dB, plus 65 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 £54.89.

The published T/S values agree with each other

Thiele/Small

Fs: 30Hz
Qts: 0.28
Qes: 0.30
Qms: 5.2
Vas: 45L
Re: 3.1Ω
Le: 0.13mH

Motor and cone

BL: 4.9T·m
Sd: 118cm²
Mms: 12g
Xmax: 5.5mm
Vd †: 65cm³
Voice coil: 36mm
Flux density: 1T

Power and response

Sensitivity †: 88.1dB
Manufacturer sensitivity: 90dB
Power: 60W
Impedance: 4Ω
EBP †: 100 · Sealed or vented

Size and mounting

Weight: 1.6kg

Other published values

Cms: 2.29mm/N

Sensitivity shows 88.1 dB, calculated from the T/S values. SB Acoustics publishes 90.0 dB, 1.9 dB apart.

† Calculated by bits from the published values

What this validation status means

Everything else SB Acoustics lists

LF · Primary · 6″

BL: 4.9T·m
Fs: 30Hz
Le: 0.13mH
Re: 3.1Ω
Sd: 118cm²
Cms: 2.29mm/N
Mms: 12g
Qes: 0.30
Qms: 5.2
Qts: 0.28
SPL: 88.1dB
Vas: 45L
Xmax: 5.5mm
Power: 60W
Impedance: 4Ω
Flux density: 1T
Sensitivity: 90dB
Calculated sensitivity †: 88.1dB
Manufacturer sensitivity: 90dB
Voice coil: 36mm
Weight: 1.6kg

Compare

Same-size drivers, compared with the SB17MFC35-4. Clear differences are green when better and red when worse.

This driverSB17MFC35-4

Best price

£54.89

30 Hz

Qts

0.28

Vas

45 L

4.9 T·m

Xmax

5.5 mm

Sensitivity

88.1 dB

Power

60 W

SB AcousticsSB13PFCR25-4-COAX

£44.29 · 19% less

Fs43 Hz +43%

Qts0.27 −4%

Vas14.4 L −68%

BL5.1 T·m +4%

Xmax4.7 mm −15%

Sensitivity87.8 dB –

SB AcousticsSB13PFC25-4-COAX

£46.01 · 16% less

Fs43 Hz +43%

Qts0.27 −4%

Vas14.4 L −68%

BL5.1 T·m +4%

Xmax4.7 mm −15%

Sensitivity87.8 dB –

SB AcousticsSB16PFC25-4-COAX

£47.68 · 13% less

Fs36 Hz +20%

Qts0.31 +11%

Vas31.3 L −30%

BL5.1 T·m +4%

Xmax4.7 mm −15%

Sensitivity88.2 dB –

SB AcousticsSB15MFC30-4

£48.66 · 11% less

Fs36 Hz +18%

Qts0.28 –

Vas19.4 L −57%

BL4.8 T·m –

Xmax5 mm −9%

Sensitivity86.6 dB −1.5

SB AcousticsSB15NRX2C30-4

£49.12 · 11% less

Fs35 Hz +15%

Qts0.28 –

Vas20.5 L −54%

BL4.7 T·m −4%

Xmax5 mm −9%

Sensitivity86.5 dB −1.6

SB AcousticsSB16PFCR25-4-COAX

£49.62 · 10% less

Fs36 Hz +20%

Qts0.31 +11%

Vas31.3 L −30%

BL5.1 T·m +4%

Xmax4.7 mm −15%

Sensitivity88.2 dB –

SB AcousticsSB15NRXC30-4

£54.13 · 1% less

Fs41 Hz +37%

Qts0.29 +4%

Vas16.7 L −63%

BL4.7 T·m −4%

Xmax5 mm −9%

Sensitivity87.7 dB –

SB AcousticsSB17NRXC35-4

£58.18 · 6% more

Fs35 Hz +17%

Qts0.32 +14%

Vas35.2 L −22%

BL4.8 T·m –

Xmax5.5 mm –

Sensitivity88.5 dB –

SB AcousticsSB17NRXC35-8

£58.60 · 7% more

Fs32 Hz +7%

Qts0.34 +21%

Vas44.5 L –

BL5.9 T·m +20%

Xmax5.5 mm –

Sensitivity88.1 dB –

SB AcousticsSB17NBAC35-4

£65.93 · 20% more

Fs30 Hz –

Qts0.29 +4%

Vas42.6 L −5%

BL4.9 T·m –

Xmax5.5 mm –

Sensitivity87.7 dB –

SB AcousticsSB15NBAC30-4

£69.45 · 27% more

Fs33 Hz +10%

Qts0.29 +4%

Vas21 L −53%

BL4.7 T·m −4%

Xmax5 mm −9%

Sensitivity85.9 dB −2.2

SB AcousticsSB15NAC30-4

£69.45 · 27% more

Fs35 Hz +17%

Qts0.30 +7%

Vas18.3 L −59%

BL4.8 T·m –

Xmax5 mm −9%

Sensitivity85.9 dB −2.2

SB AcousticsSB17NAC35-4

£71.13 · 30% more

Fs32 Hz +7%

Qts0.32 +14%

Vas33 L −27%

BL5.2 T·m +6%

Xmax5.5 mm –

Sensitivity87.1 dB −1

SB AcousticsSB17CAC35-4

£82.13 · 50% more

Fs30 Hz –

Qts0.29 +4%

Vas37.8 L −16%

BL5.3 T·m +8%

Xmax5.5 mm –

Sensitivity87 dB −1.1

SB AcousticsSB17CRC35-4

£85.53 · 56% more

Fs32 Hz +5%

Qts0.32 +14%

Vas35.5 L −21%

BL5 T·m –

Xmax5.5 mm –

Sensitivity87 dB −1.1

SB AcousticsMW13P-4

£139.69 · 154% more

Fs41 Hz +37%

Qts0.27 −4%

Vas14.6 L −68%

BL4.9 T·m –

Xmax5 mm −9%

Sensitivity87.4 dB −0.7

SB AcousticsMW13PNW-4

£139.69 · 154% more

Fs41 Hz +37%

Qts0.27 −4%

Vas14.6 L −68%

BL4.9 T·m –

Xmax5 mm −9%

Sensitivity87.4 dB −0.7

Scanspeak18W/8545K00

£144.00 · 162% more

Fs28 Hz −7%

Qts0.28 –

Vas46.4 L +3%

BL8.2 T·m +67%

Xmax6.5 mm +18%

Sensitivity87.3 dB −0.8

SB AcousticsMW16P-4

£146.49 · 167% more

Fs28 Hz −7%

Qts0.27 −4%

Vas50.2 L +12%

BL5.2 T·m +6%

Xmax6 mm +9%

Sensitivity88 dB –

SB AcousticsMW16PNW-4

£148.32 · 170% more

Fs28 Hz −7%

Qts0.27 −4%

Vas51.8 L +15%

BL5 T·m –

Xmax6 mm +9%

Sensitivity88 dB –

WavecorWF182BD08

£190.66 · 247% more

Fs33 Hz +11%

Qts0.29 +4%

Vas32.4 L −28%

BL8.5 T·m +73%

Xmax5.5 mm –

Sensitivity88.1 dB –

WavecorWF182BD03

£190.66 · 247% more

Fs39 Hz +30%

Qts0.29 +4%

Vas24.4 L −46%

BL6.8 T·m +38%

Xmax5.5 mm –

Sensitivity88.9 dB +0.8

SB AcousticsMW13TX-4

£225.24 · 310% more

Fs38 Hz +27%

Qts0.26 −7%

Vas16 L −64%

BL5 T·m –

Xmax5 mm −9%

Sensitivity87.2 dB −0.9

SB AcousticsMW16TX-4

£250.36 · 356% more

Fs29 Hz −3%

Qts0.27 −4%

Vas48 L +7%

BL5.2 T·m +6%

Xmax6 mm +9%

Sensitivity88.1 dB –

SB AcousticsMW16PF-4

No current price

Fs28 Hz −7%

Qts0.33 +18%

Vas49 L +9%

BL4.7 T·m −4%

Xmax5.5 mm –

Sensitivity86.9 dB −1.2

No photo

PHL Audio1362

No current price

Fs39 Hz +30%

Qts0.28 –

Vas34.8 L −23%

BL8.1 T·m +65%

Xmax5 mm −9%

Sensitivity90.4 dB +2.3

No photo

PHL Audio1362NDU

No current price

Fs39 Hz +30%

Qts0.28 –

Vas34.8 L −23%

BL8.1 T·m +65%

Xmax5 mm −9%

Sensitivity90.4 dB +2.3

No photo

PHL Audio1343

No current price

Fs40 Hz +33%

Qts0.28 –

Vas29.9 L −34%

BL8.1 T·m +65%

Xmax5 mm −9%

Sensitivity90.2 dB +2.1

No photo

PHL Audio1343NDU

No current price

Fs40 Hz +33%

Qts0.28 –

Vas29.9 L −34%

BL8.1 T·m +65%

Xmax5 mm −9%

Sensitivity90.2 dB +2.1

WavecorWF182BD10

No current price

Fs29 Hz −5%

Qts0.31 +11%

Vas32.4 L −28%

BL6.5 T·m +33%

Xmax5.5 mm –

Sensitivity85.7 dB −2.4

Search similar

Tune the match

Choose the published values that matter to your design. Size stays matched to this driver.

Qts

Qes

Vas

Xmax

Where to buy

Prices for delivery to the UK, including VAT. How prices work

Watch price

Shop	Price	Against the lowest	Stock	Link
Lean Business Checked 15 Oct 2026 · 4 Ω · Source: inc VAT · 20%	£54.89, the lowest price		Stock not listed	Visit shop at Lean Business
Lean Audio Checked 25 Oct 2026 · 4 Ω · Source: inc VAT · 20%	£54.89		Back order	Visit shop at Lean Audio
Willys-Hifi Checked 25 Oct 2026 · 4 Ω · Source: ex VAT · 20%	£69.43	27% above the lowest price	Stock not listed	Visit shop at Willys-Hifi
RumoH Checked 25 Oct 2026 · Ships from Netherlands · 4 Ω · Source: inc VAT Import VAT and duty may apply	£62.87	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£71.95 → £69.43Down 3.5% from £71.95
30 SepWillys-Hifi£70.95 → £71.95Up 1.4% from £70.95
29 SepWillys-Hifi£71.95 → £70.95Down 1.4% from £71.95

bits00 AUDIO

6-inch LF driver · SB17 series · 36 mm voice coil · 60 W

SB Acoustics SB17MFC35-4 4Ω

4 Ω

£54.89

Steady

Lean Business · All 6 offers

Open in 00 Simulator

Fs: 30Hz
Xmax: 5.5mm
SPL: 88dB
Pe: 60W
BL: 4.9T·m
Vd: 65cm³
Qts: 0.28
Vas: 45L

See all 21 specs

Curve provenanceInspect 3 traces

These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works

30 degrees
Frequency response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence1,473 selected pixels of 2,275
Manufacturer datasheet, page 1
60 degrees
Frequency response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence882 selected pixels of 2,375
Manufacturer datasheet, page 1
impedance
Impedance response
Trace datasheet-response-trace-poc/v1
240 plotted pointsMedium confidence2,441 selected pixels of 4,579
Manufacturer datasheet, page 1

Published graphs

Specifications

Published by SB Acoustics

Manufacturer page

Datasheet PDF

The published T/S values agree with each other

Thiele/Small

Fs: 30Hz
Qts: 0.28
Qes: 0.30
Qms: 5.2
Vas: 45L
Re: 3.1Ω
Le: 0.13mH

Motor and cone

BL: 4.9T·m
Sd: 118cm²
Mms: 12g
Xmax: 5.5mm
Vd †: 65cm³
Voice coil: 36mm
Flux density: 1T

Power and response

Sensitivity †: 88.1dB
Manufacturer sensitivity: 90dB
Power: 60W
Impedance: 4Ω
EBP †: 100 · Sealed or vented

Size and mounting

Weight: 1.6kg

Other published values

Cms: 2.29mm/N

Sensitivity shows 88.1 dB, calculated from the T/S values. SB Acoustics publishes 90.0 dB, 1.9 dB apart.

† Calculated by bits from the published values

What this validation status means

Everything else SB Acoustics lists

LF · Primary · 6″

BL: 4.9T·m
Fs: 30Hz
Le: 0.13mH
Re: 3.1Ω
Sd: 118cm²
Cms: 2.29mm/N
Mms: 12g
Qes: 0.30
Qms: 5.2
Qts: 0.28
SPL: 88.1dB
Vas: 45L
Xmax: 5.5mm
Power: 60W
Impedance: 4Ω
Flux density: 1T
Sensitivity: 90dB
Calculated sensitivity †: 88.1dB
Manufacturer sensitivity: 90dB
Voice coil: 36mm
Weight: 1.6kg

Compare

Same-size drivers, compared with the SB17MFC35-4. Clear differences are green when better and red when worse.

This driverSB17MFC35-4

Best price

£54.89

30 Hz

Qts

0.28

Vas

45 L

4.9 T·m

Xmax

5.5 mm

Sensitivity

88.1 dB

Power

60 W

SB AcousticsSB13PFCR25-4-COAX

£44.29 · 19% less

Fs43 Hz +43%

Qts0.27 −4%

Vas14.4 L −68%

BL5.1 T·m +4%

Xmax4.7 mm −15%

Sensitivity87.8 dB –

SB AcousticsSB13PFC25-4-COAX

£46.01 · 16% less

Fs43 Hz +43%

Qts0.27 −4%

Vas14.4 L −68%

BL5.1 T·m +4%

Xmax4.7 mm −15%

Sensitivity87.8 dB –

SB AcousticsSB16PFC25-4-COAX

£47.68 · 13% less

Fs36 Hz +20%

Qts0.31 +11%

Vas31.3 L −30%

BL5.1 T·m +4%

Xmax4.7 mm −15%

Sensitivity88.2 dB –

SB AcousticsSB15MFC30-4

£48.66 · 11% less

Fs36 Hz +18%

Qts0.28 –

Vas19.4 L −57%

BL4.8 T·m –

Xmax5 mm −9%

Sensitivity86.6 dB −1.5

SB AcousticsSB15NRX2C30-4

£49.12 · 11% less

Fs35 Hz +15%

Qts0.28 –

Vas20.5 L −54%

BL4.7 T·m −4%

Xmax5 mm −9%

Sensitivity86.5 dB −1.6

SB AcousticsSB16PFCR25-4-COAX

£49.62 · 10% less

Fs36 Hz +20%

Qts0.31 +11%

Vas31.3 L −30%

BL5.1 T·m +4%

Xmax4.7 mm −15%

Sensitivity88.2 dB –

SB AcousticsSB15NRXC30-4

£54.13 · 1% less

Fs41 Hz +37%

Qts0.29 +4%

Vas16.7 L −63%

BL4.7 T·m −4%

Xmax5 mm −9%

Sensitivity87.7 dB –

SB AcousticsSB17NRXC35-4

£58.18 · 6% more

Fs35 Hz +17%

Qts0.32 +14%

Vas35.2 L −22%

BL4.8 T·m –

Xmax5.5 mm –

Sensitivity88.5 dB –

SB AcousticsSB17NRXC35-8

£58.60 · 7% more

Fs32 Hz +7%

Qts0.34 +21%

Vas44.5 L –

BL5.9 T·m +20%

Xmax5.5 mm –

Sensitivity88.1 dB –

SB AcousticsSB17NBAC35-4

£65.93 · 20% more

Fs30 Hz –

Qts0.29 +4%

Vas42.6 L −5%

BL4.9 T·m –

Xmax5.5 mm –

Sensitivity87.7 dB –

SB AcousticsSB15NBAC30-4

£69.45 · 27% more

Fs33 Hz +10%

Qts0.29 +4%

Vas21 L −53%

BL4.7 T·m −4%

Xmax5 mm −9%

Sensitivity85.9 dB −2.2

SB AcousticsSB15NAC30-4

£69.45 · 27% more

Fs35 Hz +17%

Qts0.30 +7%

Vas18.3 L −59%

BL4.8 T·m –

Xmax5 mm −9%

Sensitivity85.9 dB −2.2

SB AcousticsSB17NAC35-4

£71.13 · 30% more

Fs32 Hz +7%

Qts0.32 +14%

Vas33 L −27%

BL5.2 T·m +6%

Xmax5.5 mm –

Sensitivity87.1 dB −1

SB AcousticsSB17CAC35-4

£82.13 · 50% more

Fs30 Hz –

Qts0.29 +4%

Vas37.8 L −16%

BL5.3 T·m +8%

Xmax5.5 mm –

Sensitivity87 dB −1.1

SB AcousticsSB17CRC35-4

£85.53 · 56% more

Fs32 Hz +5%

Qts0.32 +14%

Vas35.5 L −21%

BL5 T·m –

Xmax5.5 mm –

Sensitivity87 dB −1.1

SB AcousticsMW13P-4

£139.69 · 154% more

Fs41 Hz +37%

Qts0.27 −4%

Vas14.6 L −68%

BL4.9 T·m –

Xmax5 mm −9%

Sensitivity87.4 dB −0.7

SB AcousticsMW13PNW-4

£139.69 · 154% more

Fs41 Hz +37%

Qts0.27 −4%

Vas14.6 L −68%

BL4.9 T·m –

Xmax5 mm −9%

Sensitivity87.4 dB −0.7

Scanspeak18W/8545K00

£144.00 · 162% more

Fs28 Hz −7%

Qts0.28 –

Vas46.4 L +3%

BL8.2 T·m +67%

Xmax6.5 mm +18%

Sensitivity87.3 dB −0.8

SB AcousticsMW16P-4

£146.49 · 167% more

Fs28 Hz −7%

Qts0.27 −4%

Vas50.2 L +12%

BL5.2 T·m +6%

Xmax6 mm +9%

Sensitivity88 dB –

SB AcousticsMW16PNW-4

£148.32 · 170% more

Fs28 Hz −7%

Qts0.27 −4%

Vas51.8 L +15%

BL5 T·m –

Xmax6 mm +9%

Sensitivity88 dB –

WavecorWF182BD08

£190.66 · 247% more

Fs33 Hz +11%

Qts0.29 +4%

Vas32.4 L −28%

BL8.5 T·m +73%

Xmax5.5 mm –

Sensitivity88.1 dB –

WavecorWF182BD03

£190.66 · 247% more

Fs39 Hz +30%

Qts0.29 +4%

Vas24.4 L −46%

BL6.8 T·m +38%

Xmax5.5 mm –

Sensitivity88.9 dB +0.8

SB AcousticsMW13TX-4

£225.24 · 310% more

Fs38 Hz +27%

Qts0.26 −7%

Vas16 L −64%

BL5 T·m –

Xmax5 mm −9%

Sensitivity87.2 dB −0.9

SB AcousticsMW16TX-4

£250.36 · 356% more

Fs29 Hz −3%

Qts0.27 −4%

Vas48 L +7%

BL5.2 T·m +6%

Xmax6 mm +9%

Sensitivity88.1 dB –

SB AcousticsMW16PF-4

No current price

Fs28 Hz −7%

Qts0.33 +18%

Vas49 L +9%

BL4.7 T·m −4%

Xmax5.5 mm –

Sensitivity86.9 dB −1.2

No photo

PHL Audio1362

No current price

Fs39 Hz +30%

Qts0.28 –

Vas34.8 L −23%

BL8.1 T·m +65%

Xmax5 mm −9%

Sensitivity90.4 dB +2.3

No photo

PHL Audio1362NDU

No current price

Fs39 Hz +30%

Qts0.28 –

Vas34.8 L −23%

BL8.1 T·m +65%

Xmax5 mm −9%

Sensitivity90.4 dB +2.3

No photo

PHL Audio1343

No current price

Fs40 Hz +33%

Qts0.28 –

Vas29.9 L −34%

BL8.1 T·m +65%

Xmax5 mm −9%

Sensitivity90.2 dB +2.1

No photo

PHL Audio1343NDU

No current price

Fs40 Hz +33%

Qts0.28 –

Vas29.9 L −34%

BL8.1 T·m +65%

Xmax5 mm −9%

Sensitivity90.2 dB +2.1

WavecorWF182BD10

No current price

Fs29 Hz −5%

Qts0.31 +11%

Vas32.4 L −28%

BL6.5 T·m +33%

Xmax5.5 mm –

Sensitivity85.7 dB −2.4

Search similar

Tune the match

Choose the published values that matter to your design. Size stays matched to this driver.

Qts

Qes

Vas

Xmax

Where to buy

Prices for delivery to the UK, including VAT. How prices work

Watch price

Shop	Price	Against the lowest	Stock	Link
Lean Business Checked 15 Oct 2026 · 4 Ω · Source: inc VAT · 20%	£54.89, the lowest price		Stock not listed	Visit shop at Lean Business
Lean Audio Checked 25 Oct 2026 · 4 Ω · Source: inc VAT · 20%	£54.89		Back order	Visit shop at Lean Audio
Willys-Hifi Checked 25 Oct 2026 · 4 Ω · Source: ex VAT · 20%	£69.43	27% above the lowest price	Stock not listed	Visit shop at Willys-Hifi
RumoH Checked 25 Oct 2026 · Ships from Netherlands · 4 Ω · Source: inc VAT Import VAT and duty may apply	£62.87	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£71.95 → £69.43Down 3.5% from £71.95
30 SepWillys-Hifi£70.95 → £71.95Up 1.4% from £70.95
29 SepWillys-Hifi£71.95 → £70.95Down 1.4% from £71.95