15-inch LF driver · 102 mm voice coil · 1,200 W

BMS 15N840 8Ω

Name: BMS 15N840 8 Ohm
Brand: BMS
SKU: 15N840
Availability: InStock

8 Ω · 22–300 Hz

£360.08

Steady

Lean Audio · 1 in stock · All 1 offer

Open in 00 Simulator

Fs: 36Hz
Xmax: 11mm
SPL: 95dB
Pe: 1200W
BL: 24.6T·m
Vd: 930cm³
Qts: 0.30
Vas: 146L

See all 20 specs

Specifications

Published by BMS

Manufacturer page

BMS 15N840 is a 15-inch 8 ohm LF driver rated at 1200 W RMS. The validated T/S data includes Fs 36 Hz, Qts 0.30, Vas 145.7 L, Xmax 11 mm, sensitivity 95.2 dB, plus 930 cm³ Vd and 111 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 £360.08.

The published T/S values agree with each other

Thiele/Small

Fs: 36Hz
Qts: 0.30
Qes: 0.32
Qms: 5.8
Vas: 145.7L
Re: 5Ω
Le: 0.82mH

Motor and cone

BL: 24.6T·m
Sd: 845cm²
Mms: 137g
Xmax: 11mm
Vd †: 930cm³
Voice coil: 102mm

Power and response

Sensitivity †: 95.2dB
Manufacturer sensitivity: 95dB
Power: 1200W
Impedance: 8Ω
Range: 22–300Hz
EBP †: 111 · Leans vented

Other published values

Cms: 0.15mm/N

† Calculated by bits from the published values

What this validation status means

Everything else BMS lists

LF

BL: 24.6T·m
Fs: 36Hz
Le: 0.82mH
Re: 5Ω
Sd: 845cm²
Cms: 0.15mm/N
Mms: 137g
Qes: 0.32
Qms: 5.8
Qts: 0.30
SPL: 95.2dB
Vas: 145.7L
Xmax: 11mm
Power: 1200W
Impedance: 8Ω
Sensitivity: 95dB
Low limit: 22Hz
Calculated sensitivity †: 95.2dB
High limit: 300Hz
Manufacturer sensitivity: 95dB
Voice coil: 102mm
10. basket: Cast Aluminum
20. bl factor: BL 24.6 Tesla m
1. application: Subwoofer
18. moving mass: Mms 0.137 kg
13. dc resistance: Re 5.00 Ohm
9. magnet gap depth: 10 mm
17. equivalent volume: Vas 145.7 L
2. nominal impendance: 8 Ohm
5. frequency response: 22 – 300 Hz
6. voice coil diameter: 101.6 (4″) mm
7. voice coil material: Cu
12. resonance frequency: Fs 35.6 Hz
14. mechanical q factor: Qms 5.75
15. electrical q factor: Qes 0.32
16. total quality factor: Qts 0.30
19. mechanical complience: Cms 0.146 mm / N
21. effective piston area: Sd 0.0845 m²
22. max. linear excursion: Xmax +/- 11 mm
23. voice coil inductance: Le1k 0.82 mH
4. sensitivity (1 w / 1 m): 95 dB
3. power handling aes noise: 1200 W
8. voice coil winding depth: 32 mm
11. effect. diaphragm diameter d: 330 mm

Compare

Same-size drivers, compared with the 15N840. Clear differences are green when better and red when worse.

This driver15N840

Best price

£360.08

36 Hz

Qts

0.30

Vas

145.7 L

24.6 T·m

Xmax

11 mm

Sensitivity

95.2 dB

Power

1200 W

CelestionCF1540HD

£175.00 · 51% less

Fs41 Hz +15%

Qts0.30 –

Vas108.3 L −26%

BL24.4 T·m –

Xmax10.5 mm −5%

Sensitivity95.6 dB –

Beyma15LEX1000FE

£210.85 · 41% less

Fs41 Hz +15%

Qts0.34 +13%

Vas116 L −20%

BL23.2 T·m −6%

Xmax11 mm –

Sensitivity95.4 dB –

Precision DevicesPD.154C001

£219.00 · 39% less

Fs45 Hz +26%

Qts0.31 +4%

Vas128 L −12%

BL25.5 T·m +4%

Xmax8.2 mm −25%

Sensitivity97.4 dB +2.2

B&C15TBX100

£225.00 · 38% less

Fs35 Hz –

Qts0.28 −7%

Vas113 L −22%

BL25.5 T·m +4%

Xmax9 mm −18%

Sensitivity94.1 dB −1.1

RCFLF15X401

£240.00 · 33% less

Fs34 Hz −4%

Qts0.29 −3%

Vas146 L –

BL26.5 T·m +8%

Xmax12 mm +9%

Sensitivity94.8 dB –

FaitalPRO15FX560

£245.00 · 32% less

Fs38 Hz +7%

Qts0.30 –

Vas159 L +9%

BL21.5 T·m −13%

Xmax9.4 mm −14%

Sensitivity96.5 dB +1.3

B&C15TBW100

£246.65 · 32% less

Fs39 Hz +10%

Qts0.31 +3%

Vas96 L −34%

BL26.4 T·m +7%

Xmax12 mm +9%

Sensitivity94.4 dB −0.8

Eighteen Sound15LW1401

£254.65 · 29% less

Fs42 Hz +18%

Qts0.27 −10%

Vas131 L −10%

BL24.2 T·m –

Xmax9 mm −18%

Sensitivity97.4 dB +2.2

Eighteen Sound15LW2400

£262.08 · 27% less

Fs40 Hz +12%

Qts0.30 –

Vas131 L −10%

BL24 T·m –

Xmax10 mm −9%

Sensitivity96.2 dB +1

B&C15NBX100

£267.25 · 26% less

Fs36 Hz –

Qts0.29 −3%

Vas125 L −14%

BL25 T·m –

Xmax10 mm −9%

Sensitivity94.8 dB –

FaitalPRO15FX600

£283.85 · 21% less

Fs38 Hz +7%

Qts0.27 −10%

Vas128.3 L −12%

BL23.2 T·m −6%

Xmax11.3 mm –

Sensitivity96 dB +0.8

FaitalPRO15HP1060

£287.20 · 20% less

Fs40 Hz +12%

Qts0.31 +3%

Vas100.3 L −31%

BL24.8 T·m –

Xmax12.4 mm +13%

Sensitivity95.1 dB –

Eighteen Sound15NLW9401

£288.50 · 20% less

Fs39 Hz +10%

Qts0.26 −13%

Vas134 L −8%

BL25.4 T·m +3%

Xmax10 mm −9%

Sensitivity96.6 dB +1.4

Sica15 S 4 PL

£300.59 · 17% less

Fs40 Hz +11%

Qts0.32 +7%

Vas127.6 L −12%

BL22.5 T·m −8%

Xmax10 mm −9%

Sensitivity95.8 dB +0.6

Sica15 K 4 PL

£305.62 · 15% less

Fs47 Hz +31%

Qts0.30 –

Vas102.3 L −30%

BL23.9 T·m –

Xmax8 mm −27%

Sensitivity97.2 dB +2

B&C15SW100

£317.34 · 12% less

Fs37 Hz +4%

Qts0.31 +3%

Vas110 L −25%

BL25.6 T·m +4%

Xmax12.5 mm +14%

Sensitivity94.2 dB −1

Beyma15LEX1200ND

£320.84 · 11% less

Fs36 Hz –

Qts0.30 –

Vas127 L −13%

BL26.4 T·m +7%

Xmax11 mm –

Sensitivity94.7 dB −0.5

FaitalPRO15HX500

£426.19 · 18% more

Fs40 Hz +12%

Qts0.28 −7%

Vas150.1 L +3%

BL22.2 T·m −10%

Xmax9.4 mm −15%

Sensitivity97.2 dB +2

B&C15CXN88

£494.86 · 37% more

Fs47 Hz +32%

Qts0.30 –

Vas124 L −15%

BL20.1 T·m −18%

Xmax9.5 mm −14%

Sensitivity98.2 dB +3

BMS15N850V2

No current price

Fs36 Hz –

Qts0.30 –

Vas145.7 L –

BL24.6 T·m –

Xmax11 mm –

Sensitivity95.2 dB –

No photo

PHL Audio6201MND

No current price

Fs36 Hz –

Qts0.27 −10%

Vas140 L −4%

BL25 T·m –

Xmax10.5 mm −5%

Sensitivity95.6 dB –

Oberton15XB1200

No current price

Fs40 Hz +12%

Qts0.31 –

Vas108.5 L −26%

BL23.9 T·m –

Xmax12 mm +9%

Sensitivity95.3 dB –

Oberton15XB1201

No current price

Fs40 Hz +12%

Qts0.31 –

Vas108.5 L −26%

BL23.9 T·m –

Xmax12 mm +9%

Sensitivity95.3 dB –

Oberton15NXL701

No current price

Fs43 Hz +22%

Qts0.30 –

Vas127.1 L −13%

BL21.7 T·m −12%

Xmax9.3 mm −16%

Sensitivity97.3 dB +2.1

No photo

PHL Audio6301MND

No current price

Fs36 Hz –

Qts0.26 −13%

Vas140 L −4%

BL25.5 T·m +4%

Xmax10.5 mm −5%

Sensitivity95.7 dB +0.5

Oberton15NXB1201

No current price

Fs38 Hz +8%

Qts0.32 +8%

Vas111.9 L −23%

BL23.6 T·m −4%

Xmax12 mm +9%

Sensitivity94.8 dB –

No photo

PHL Audio5021M

No current price

Fs32 Hz −10%

Qts0.30 –

Vas169 L +16%

BL24 T·m –

Xmax7 mm −36%

Sensitivity94.4 dB −0.8

Oberton15NSW600

No current price

Fs37 Hz –

Qts0.29 –

Vas148.4 L –

BL23.4 T·m −5%

Xmax14.3 mm +30%

Sensitivity95.8 dB +0.6

CelestionFTR15-4080HDX

No current price

Fs40 Hz +12%

Qts0.32 +7%

Vas111.2 L −24%

BL23.1 T·m −6%

Xmax10.1 mm −8%

Sensitivity95 dB –

Eighteen Sound15NTLW2500

No current price

Fs45 Hz +26%

Qts0.30 –

Vas143 L –

BL21.2 T·m −14%

Xmax8 mm −27%

Sensitivity98.3 dB +3.1

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 Audio Checked 26 Oct 2026 · 8 Ω · Source: inc VAT · 20%	£360.08, the lowest price		1 in stock	Visit shop at Lean Audio

Best price over time

Tracked since 1 Apr

bits00 AUDIO

15-inch LF driver · 102 mm voice coil · 1,200 W

BMS 15N840 8Ω

8 Ω · 22–300 Hz

£360.08

Steady

Lean Audio · 1 in stock · All 1 offer

Open in 00 Simulator

Fs: 36Hz
Xmax: 11mm
SPL: 95dB
Pe: 1200W
BL: 24.6T·m
Vd: 930cm³
Qts: 0.30
Vas: 146L

See all 20 specs

Specifications

Published by BMS

Manufacturer page

The published T/S values agree with each other

Thiele/Small

Fs: 36Hz
Qts: 0.30
Qes: 0.32
Qms: 5.8
Vas: 145.7L
Re: 5Ω
Le: 0.82mH

Motor and cone

BL: 24.6T·m
Sd: 845cm²
Mms: 137g
Xmax: 11mm
Vd †: 930cm³
Voice coil: 102mm

Power and response

Sensitivity †: 95.2dB
Manufacturer sensitivity: 95dB
Power: 1200W
Impedance: 8Ω
Range: 22–300Hz
EBP †: 111 · Leans vented

Other published values

Cms: 0.15mm/N

† Calculated by bits from the published values

What this validation status means

Everything else BMS lists

LF

BL: 24.6T·m
Fs: 36Hz
Le: 0.82mH
Re: 5Ω
Sd: 845cm²
Cms: 0.15mm/N
Mms: 137g
Qes: 0.32
Qms: 5.8
Qts: 0.30
SPL: 95.2dB
Vas: 145.7L
Xmax: 11mm
Power: 1200W
Impedance: 8Ω
Sensitivity: 95dB
Low limit: 22Hz
Calculated sensitivity †: 95.2dB
High limit: 300Hz
Manufacturer sensitivity: 95dB
Voice coil: 102mm
10. basket: Cast Aluminum
20. bl factor: BL 24.6 Tesla m
1. application: Subwoofer
18. moving mass: Mms 0.137 kg
13. dc resistance: Re 5.00 Ohm
9. magnet gap depth: 10 mm
17. equivalent volume: Vas 145.7 L
2. nominal impendance: 8 Ohm
5. frequency response: 22 – 300 Hz
6. voice coil diameter: 101.6 (4″) mm
7. voice coil material: Cu
12. resonance frequency: Fs 35.6 Hz
14. mechanical q factor: Qms 5.75
15. electrical q factor: Qes 0.32
16. total quality factor: Qts 0.30
19. mechanical complience: Cms 0.146 mm / N
21. effective piston area: Sd 0.0845 m²
22. max. linear excursion: Xmax +/- 11 mm
23. voice coil inductance: Le1k 0.82 mH
4. sensitivity (1 w / 1 m): 95 dB
3. power handling aes noise: 1200 W
8. voice coil winding depth: 32 mm
11. effect. diaphragm diameter d: 330 mm

Compare

Same-size drivers, compared with the 15N840. Clear differences are green when better and red when worse.

This driver15N840

Best price

£360.08

36 Hz

Qts

0.30

Vas

145.7 L

24.6 T·m

Xmax

11 mm

Sensitivity

95.2 dB

Power

1200 W

CelestionCF1540HD

£175.00 · 51% less

Fs41 Hz +15%

Qts0.30 –

Vas108.3 L −26%

BL24.4 T·m –

Xmax10.5 mm −5%

Sensitivity95.6 dB –

Beyma15LEX1000FE

£210.85 · 41% less

Fs41 Hz +15%

Qts0.34 +13%

Vas116 L −20%

BL23.2 T·m −6%

Xmax11 mm –

Sensitivity95.4 dB –

Precision DevicesPD.154C001

£219.00 · 39% less

Fs45 Hz +26%

Qts0.31 +4%

Vas128 L −12%

BL25.5 T·m +4%

Xmax8.2 mm −25%

Sensitivity97.4 dB +2.2

B&C15TBX100

£225.00 · 38% less

Fs35 Hz –

Qts0.28 −7%

Vas113 L −22%

BL25.5 T·m +4%

Xmax9 mm −18%

Sensitivity94.1 dB −1.1

RCFLF15X401

£240.00 · 33% less

Fs34 Hz −4%

Qts0.29 −3%

Vas146 L –

BL26.5 T·m +8%

Xmax12 mm +9%

Sensitivity94.8 dB –

FaitalPRO15FX560

£245.00 · 32% less

Fs38 Hz +7%

Qts0.30 –

Vas159 L +9%

BL21.5 T·m −13%

Xmax9.4 mm −14%

Sensitivity96.5 dB +1.3

B&C15TBW100

£246.65 · 32% less

Fs39 Hz +10%

Qts0.31 +3%

Vas96 L −34%

BL26.4 T·m +7%

Xmax12 mm +9%

Sensitivity94.4 dB −0.8

Eighteen Sound15LW1401

£254.65 · 29% less

Fs42 Hz +18%

Qts0.27 −10%

Vas131 L −10%

BL24.2 T·m –

Xmax9 mm −18%

Sensitivity97.4 dB +2.2

Eighteen Sound15LW2400

£262.08 · 27% less

Fs40 Hz +12%

Qts0.30 –

Vas131 L −10%

BL24 T·m –

Xmax10 mm −9%

Sensitivity96.2 dB +1

B&C15NBX100

£267.25 · 26% less

Fs36 Hz –

Qts0.29 −3%

Vas125 L −14%

BL25 T·m –

Xmax10 mm −9%

Sensitivity94.8 dB –

FaitalPRO15FX600

£283.85 · 21% less

Fs38 Hz +7%

Qts0.27 −10%

Vas128.3 L −12%

BL23.2 T·m −6%

Xmax11.3 mm –

Sensitivity96 dB +0.8

FaitalPRO15HP1060

£287.20 · 20% less

Fs40 Hz +12%

Qts0.31 +3%

Vas100.3 L −31%

BL24.8 T·m –

Xmax12.4 mm +13%

Sensitivity95.1 dB –

Eighteen Sound15NLW9401

£288.50 · 20% less

Fs39 Hz +10%

Qts0.26 −13%

Vas134 L −8%

BL25.4 T·m +3%

Xmax10 mm −9%

Sensitivity96.6 dB +1.4

Sica15 S 4 PL

£300.59 · 17% less

Fs40 Hz +11%

Qts0.32 +7%

Vas127.6 L −12%

BL22.5 T·m −8%

Xmax10 mm −9%

Sensitivity95.8 dB +0.6

Sica15 K 4 PL

£305.62 · 15% less

Fs47 Hz +31%

Qts0.30 –

Vas102.3 L −30%

BL23.9 T·m –

Xmax8 mm −27%

Sensitivity97.2 dB +2

B&C15SW100

£317.34 · 12% less

Fs37 Hz +4%

Qts0.31 +3%

Vas110 L −25%

BL25.6 T·m +4%

Xmax12.5 mm +14%

Sensitivity94.2 dB −1

Beyma15LEX1200ND

£320.84 · 11% less

Fs36 Hz –

Qts0.30 –

Vas127 L −13%

BL26.4 T·m +7%

Xmax11 mm –

Sensitivity94.7 dB −0.5

FaitalPRO15HX500

£426.19 · 18% more

Fs40 Hz +12%

Qts0.28 −7%

Vas150.1 L +3%

BL22.2 T·m −10%

Xmax9.4 mm −15%

Sensitivity97.2 dB +2

B&C15CXN88

£494.86 · 37% more

Fs47 Hz +32%

Qts0.30 –

Vas124 L −15%

BL20.1 T·m −18%

Xmax9.5 mm −14%

Sensitivity98.2 dB +3

BMS15N850V2

No current price

Fs36 Hz –

Qts0.30 –

Vas145.7 L –

BL24.6 T·m –

Xmax11 mm –

Sensitivity95.2 dB –

No photo

PHL Audio6201MND

No current price

Fs36 Hz –

Qts0.27 −10%

Vas140 L −4%

BL25 T·m –

Xmax10.5 mm −5%

Sensitivity95.6 dB –

Oberton15XB1200

No current price

Fs40 Hz +12%

Qts0.31 –

Vas108.5 L −26%

BL23.9 T·m –

Xmax12 mm +9%

Sensitivity95.3 dB –

Oberton15XB1201

No current price

Fs40 Hz +12%

Qts0.31 –

Vas108.5 L −26%

BL23.9 T·m –

Xmax12 mm +9%

Sensitivity95.3 dB –

Oberton15NXL701

No current price

Fs43 Hz +22%

Qts0.30 –

Vas127.1 L −13%

BL21.7 T·m −12%

Xmax9.3 mm −16%

Sensitivity97.3 dB +2.1

No photo

PHL Audio6301MND

No current price

Fs36 Hz –

Qts0.26 −13%

Vas140 L −4%

BL25.5 T·m +4%

Xmax10.5 mm −5%

Sensitivity95.7 dB +0.5

Oberton15NXB1201

No current price

Fs38 Hz +8%

Qts0.32 +8%

Vas111.9 L −23%

BL23.6 T·m −4%

Xmax12 mm +9%

Sensitivity94.8 dB –

No photo

PHL Audio5021M

No current price

Fs32 Hz −10%

Qts0.30 –

Vas169 L +16%

BL24 T·m –

Xmax7 mm −36%

Sensitivity94.4 dB −0.8

Oberton15NSW600

No current price

Fs37 Hz –

Qts0.29 –

Vas148.4 L –

BL23.4 T·m −5%

Xmax14.3 mm +30%

Sensitivity95.8 dB +0.6

CelestionFTR15-4080HDX

No current price

Fs40 Hz +12%

Qts0.32 +7%

Vas111.2 L −24%

BL23.1 T·m −6%

Xmax10.1 mm −8%

Sensitivity95 dB –

Eighteen Sound15NTLW2500

No current price

Fs45 Hz +26%

Qts0.30 –

Vas143 L –

BL21.2 T·m −14%

Xmax8 mm −27%

Sensitivity98.3 dB +3.1

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 Audio Checked 26 Oct 2026 · 8 Ω · Source: inc VAT · 20%	£360.08, the lowest price		1 in stock	Visit shop at Lean Audio

Best price over time

Tracked since 1 Apr