- Net volume
- 20L
- Tuning
- 67Hz
Eighteen Sound gives the volume and tuning; the port is sized for the driver when you open it.
8-inch LF driver · 280 W
Eighteen Sound 8NMB420 16Ω
60–5500 Hz
£99.97
SteadyLean Audio · 1 in stock · All 3 offers
- Fs
- 66Hz
- Xmax
- 5.8mm
- SPL
- 94dB
- Pe
- 280W
- BL
- 12T·m
- Vd
- 132cm³
- Qts
- 0.41
- Vas
- 25L
Published graphs
Eighteen Sound 8NMB420 is an 8-inch 16 ohm LF driver rated at 280 W RMS. The validated T/S data includes Fs 66 Hz, Qts 0.41, Vas 24.5 L, Xmax 5.8 mm, sensitivity 93.8 dB, plus 132 cm³ Vd and 140 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 £99.97.
The published T/S values agree with each other
Thiele/Small
- Fs
- 66Hz
- Qts
- 0.41
- Qes
- 0.47
- Qms
- 3.2
- Vas
- 24.5L
- Re
- 9.8Ω
- Le
- 0.61mH
Motor and cone
- BL
- 12T·m
- Sd
- 227cm²
- Mms
- 17g
- Xmax
- 5.8mm
- Vd †
- 132cm³
Power and response
- Sensitivity †
- 93.8dB
- Manufacturer sensitivity
- 95dB
- Power
- 280W
- Nominal power
- 280W
- Impedance
- 16Ω
- Range
- 60–5500Hz
- EBP †
- 140 · Leans vented
Size and mounting
- Diameter
- 210mm
- Cutout
- 186mm
- Bolt circle
- 195mm
- Depth
- 99mm
- Weight
- 1.7kg
Other published values
- Power Program
- 400
Sensitivity shows 93.8 dB, calculated from the T/S values. Eighteen Sound publishes 95.0 dB, 1.2 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Eighteen Sound lists
LF · Primary · 8″
- BL
- 12T·m
- Fs
- 66Hz
- Le
- 0.61mH
- Re
- 9.8Ω
- Sd
- 227cm²
- Mms
- 17g
- Qes
- 0.47
- Qms
- 3.2
- Qts
- 0.41
- SPL
- 93.8dB
- Vas
- 24.5L
- Xmax
- 5.8mm
- Power
- 280W
- Impedance
- 16Ω
- Sensitivity
- 95dB
- Low limit
- 60Hz
- Nominal power
- 280W
- Power Program
- 400
- Calculated sensitivity †
- 93.8dB
- High limit
- 5500Hz
- Manufacturer sensitivity
- 95dB
- Weight
- 1.7kg
- Diameter
- 210mm
- Depth
- 99mm
- Cutout
- 186mm
- Bolt circle
- 195mm
02
Designs
What Eighteen Sound suggests for the 8NMB420. No published designs name it yet.
How we find designsEighteen Sound’s suggested box
From Eighteen Sound’s 8NMB420 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 8NMB420. Clear differences are green when better and red when worse.
This driver8NMB420
Best price
£99.97
Fs
66 Hz
Qts
0.41
Vas
24.5 L
BL
12 T·m
Xmax
5.8 mm
Sensitivity
93.8 dB
Power
280 W
FaitalPRO8FE300
£43.52 · 56% less, betterFs70 Hz +6%
Qts0.44 +7%
Vas15.7 L −36%, better
BL11.3 T·m −6%
Xmax5.5 mm −5%
Sensitivity92.7 dB −1.1
FaneSOVEREIGN 8-225
£49.00 · 51% less, betterFs62 Hz −6%
Qts0.38 −7%
Vas22 L −10%, better
BL11 T·m −8%
Xmax5.5 mm −5%
Sensitivity93 dB −0.8
MonacorSP-8/150PRO
£57.28 · 43% less, betterFs56 Hz −15%, better
Qts0.32 −22%, better
Vas22 L −10%, better
BL12.0 T·m –
Xmax6 mm +3%
Sensitivity91.8 dB −2, worse
Dayton AudioRS180P-4
£59.60 · 40% less, betterFs38 Hz −43%, better
Qts0.39 −5%
Vas27.3 L +11%, worse
BL4.7 T·m −61%, worse
Xmax6 mm +3%
Sensitivity86.9 dB −6.9, worse
CelestionTRUVOX 0820
£59.70 · 40% less, betterFs74 Hz +12%, worse
Qts0.39 −5%
Vas17.3 L −30%, better
BL11.5 T·m −4%
Xmax5 mm −14%, worse
Sensitivity94.3 dB +0.5
Dayton AudioRS180S-8
£78.48 · 21% less, betterFs38 Hz −43%, better
Qts0.36 −12%, better
Vas23 L −6%
BL7.3 T·m −39%, worse
Xmax6 mm +3%
Sensitivity86 dB −7.8, worse
CelestionCF0820BMB
£85.00 · 15% less, betterFs51 Hz −23%, better
Qts0.37 −11%, better
Vas22.4 L −9%
BL11.9 T·m –
Xmax7.3 mm +25%, better
Sensitivity90.7 dB −3.1, worse
PRV Audio8MR600X
£94.40 · 6% less, betterFs77 Hz +17%, worse
Qts0.40 –
Vas20.0 L −19%, better
BL10.5 T·m −12%, worse
Xmax5.3 mm −9%
Sensitivity95.3 dB +1.5
B&C8FMB51
£96.76 · 3% lessFs68 Hz +3%
Qts0.39 −5%
Vas20.5 L −16%, better
BL13.7 T·m +14%, better
Xmax5.5 mm −5%
Sensitivity93.8 dB –
B&C8BG51
£110.00 · 10% more, worseFs52 Hz −21%, better
Qts0.40 –
Vas18 L −27%, better
BL11.8 T·m –
Xmax6.5 mm +12%, better
Sensitivity89.8 dB −4, worse
B&C8MBX51
£113.58 · 14% more, worseFs68 Hz +3%
Qts0.38 −7%
Vas22 L −10%, better
BL13.7 T·m +14%, better
Xmax6 mm +3%
Sensitivity94.1 dB –
CelestionNTR08-2011D
£125.00 · 25% more, worseFs85 Hz +28%, worse
Qts0.44 +6%
Vas10.3 L −58%, better
BL12.0 T·m –
Xmax6 mm +3%
Sensitivity92.7 dB −1.1
FaitalPRO8HX150
£135.13 · 35% more, worseFs76 Hz +15%, worse
Qts0.41 –
Vas13 L −47%, better
BL11.6 T·m −3%
Xmax4.9 mm −15%, worse
Sensitivity93.3 dB −0.5
LavoceCSF082.00K
£140.85 · 41% more, worseFs81 Hz +23%, worse
Qts0.40 –
Vas14.8 L −40%, better
BL11.0 T·m −8%
Xmax5 mm −14%, worse
Sensitivity94.5 dB +0.7
Dayton AudioRSS210HO-4
£175.47 · 76% more, worseFs30 Hz −55%, better
Qts0.40 –
Vas18.7 L −24%, better
BL12 T·m –
Xmax11 mm +90%, better
Sensitivity82.3 dB −11.5, worse
Eighteen Sound8CX650
£344.69 · 245% more, worseFs65 Hz –
Qts0.35 −15%, better
Vas16.6 L −32%, better
BL12 T·m –
Xmax6 mm +3%
Sensitivity92.9 dB −0.9
No current price
Fs62 Hz −6%
Qts0.38 −7%
Vas22 L −10%, better
BL11 T·m −8%
Xmax5.5 mm −5%
Sensitivity93 dB −0.8
Eighteen Sound8MB400
No current priceFs64 Hz −3%
Qts0.38 −7%
Vas23.9 L –
BL9.3 T·m −22%, worse
Xmax5.8 mm –
Sensitivity93.7 dB –
LavoceFBASS08-18
No current priceFs53 Hz −20%, better
Qts0.40 –
Vas23.6 L −4%
BL11.4 T·m −5%
Xmax4.5 mm −22%, worse
Sensitivity91.2 dB −2.6, worse
WavecorWF182BD11
No current priceFs34 Hz −48%, better
Qts0.42 –
Vas24.3 L –
BL8.2 T·m −32%, worse
Xmax5.5 mm −5%
Sensitivity85.4 dB −8.4, worse
WavecorWF182BD19
No current priceFs34 Hz −48%, better
Qts0.42 –
Vas24.3 L –
BL8.2 T·m −32%, worse
Xmax5.5 mm −5%
Sensitivity85.4 dB −8.4, worse
CelestionCNX0820
No current priceFs95 Hz +43%, worse
Qts0.40 −4%
Vas9.9 L −60%, better
BL12.0 T·m –
Xmax6 mm +3%
Sensitivity94.7 dB +0.9
Tang BandW8-670Q
No current priceFs38 Hz −42%, better
Qts0.46 +12%, worse
Vas24.9 L –
BL12.3 T·m –
Xmax7 mm +21%, better
Sensitivity86.3 dB −7.5, worse
SB AudienceBIANCO-8MW250
No current priceFs74 Hz +12%, worse
Qts0.40 –
Vas13.8 L −44%, better
BL11 T·m −8%
Xmax6.5 mm +12%, better
Sensitivity93 dB −0.8
Oberton8NCX
No current priceFs77 Hz +17%, worse
Qts0.40 –
Vas14.9 L −39%, better
BL10.1 T·m −16%, worse
Xmax5.3 mm −9%
Sensitivity94 dB –
HiViD8G
No current priceFs35 Hz −47%, better
Qts0.41 –
Vas30.3 L +24%, worse
BL13 T·m +8%
Xmax8.3 mm +43%, better
Sensitivity86.4 dB −7.4, worse
BMS8S219
No current priceFs82 Hz +24%, worse
Qts0.41 –
Vas9.7 L −60%, better
BL13.3 T·m +11%, better
Xmax6.3 mm +9%
Sensitivity92.8 dB −1
Oberton8CX
No current priceFs76 Hz +15%, worse
Qts0.40 –
Vas16.8 L −31%, better
BL9.4 T·m −21%, worse
Xmax5.3 mm −9%
Sensitivity94.3 dB +0.5
Tang BandW8-1747A
No current priceFs30 Hz −55%, better
Qts0.41 –
Vas23.2 L −6%
BL10.0 T·m −17%, worse
Xmax8 mm +38%, better
Sensitivity83 dB −10.8, worse
LavoceNBASS08-20
No current priceFs55 Hz −17%, better
Qts0.48 +17%, worse
Vas18.4 L −25%, better
BL11.3 T·m −6%
Xmax6.5 mm +12%, better
Sensitivity89.9 dB −3.9, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Lean Audio | £99.97, the lowest price | 1 in stock | Visit shop at Lean Audio |
Best price over time
Tracked since 1 Apr