Dayton AudioDS215-8
£49.33 · 59% less, betterFs34 Hz −44%, better
Qts0.31 +11%, worse
Vas43.1 L +31%, worse
BL9.9 T·m –
Xmax5.5 mm −5%
Sensitivity88.6 dB −7.3, worse
8-inch LF driver · 280 W
Eighteen Sound 8NMB420 8Ω
60–5500 Hz
- Fs
- 61Hz
- Xmax
- 5.8mm
- SPL
- 96dB
- Pe
- 280W
- BL
- 10T·m
- Vd
- 133cm³
- Qts
- 0.28
- Vas
- 33L
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 2 traces
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
frequency response
Frequency response
240 plotted pointsMedium confidence2,388 selected pixels of 2,796 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence1,780 selected pixels of 2,011
Published graphs
Eighteen Sound 8NMB420 is an 8-inch 8 ohm LF driver rated at 280 W RMS. The validated T/S data includes Fs 61 Hz, Qts 0.28, Vas 33 L, Xmax 5.8 mm, sensitivity 95.9 dB, plus 133 cm³ Vd and 197 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 £120.21.
The published T/S values agree with each other
Thiele/Small
- Fs
- 61Hz
- Qts
- 0.28
- Qes
- 0.31
- Qms
- 4
- Vas
- 33L
- Re
- 5Ω
- Le
- 0.35mH
Motor and cone
- BL
- 10T·m
- Sd
- 230cm²
- Mms
- 15g
- Xmax
- 5.8mm
- Vd †
- 133cm³
Power and response
- Sensitivity †
- 95.9dB
- Manufacturer sensitivity
- 95dB
- Power
- 280W
- Nominal power
- 280W
- Impedance
- 8Ω
- Range
- 60–5500Hz
- EBP †
- 197 · Leans vented
Size and mounting
- Diameter
- 210mm
- Cutout
- 186mm
- Bolt circle
- 195mm
- Depth
- 99mm
- Weight
- 1.7kg
Other published values
- Power Program
- 400
† Calculated by bits from the published values
What this validation status means
Everything else Eighteen Sound lists
LF · Primary · 8″
- BL
- 10T·m
- Fs
- 61Hz
- Le
- 0.35mH
- Re
- 5Ω
- Sd
- 230cm²
- Mms
- 15g
- Qes
- 0.31
- Qms
- 4
- Qts
- 0.28
- SPL
- 95.9dB
- Vas
- 33L
- Xmax
- 5.8mm
- Power
- 280W
- Impedance
- 8Ω
- Sensitivity
- 95dB
- Low limit
- 60Hz
- Nominal power
- 280W
- Power Program
- 400
- Calculated sensitivity †
- 95.9dB
- High limit
- 5500Hz
- Manufacturer sensitivity
- 95dB
- Weight
- 1.7kg
- Diameter
- 210mm
- Depth
- 99mm
- Cutout
- 186mm
- Bolt circle
- 195mm
02
Compare
Same-size drivers, compared with the 8NMB420. Clear differences are green when better and red when worse.
This driver8NMB420
Best price
£120.21
Fs
61 Hz
Qts
0.28
Vas
33 L
BL
10 T·m
Xmax
5.8 mm
Sensitivity
95.9 dB
Power
280 W
Dayton AudioDSA215-8
£56.06 · 53% less, betterFs35 Hz −43%, better
Qts0.33 +18%, worse
Vas37.4 L +13%, worse
BL10.6 T·m +6%
Xmax5.5 mm −5%
Sensitivity88.1 dB −7.8, worse
Beyma8WRS300
£75.45 · 37% less, betterFs65 Hz +7%
Qts0.28 –
Vas15 L −55%, better
BL15.2 T·m +52%, better
Xmax6 mm +3%
Sensitivity93.4 dB −2.5, worse
Beyma8P300FE
£79.99 · 33% less, betterFs53 Hz −13%, better
Qts0.31 +11%, worse
Vas24.8 L −25%, better
BL11.6 T·m +16%, better
Xmax6 mm +3%
Sensitivity92.7 dB −3.2, worse
B&C8FMB51
£91.31 · 24% less, betterFs67 Hz +10%
Qts0.28 –
Vas20.7 L −37%, better
BL11.3 T·m +13%, better
Xmax5.5 mm −5%
Sensitivity95.1 dB −0.8
EminenceBETA 8CX
£95.86 · 20% less, betterFs62 Hz –
Qts0.29 +4%
Vas21.4 L −35%, better
BL11.2 T·m +12%, better
Xmax3.2 mm −45%, worse
Sensitivity94.2 dB −1.7
ETON7-612/C8/32 RP
£96.30 · 20% less, betterFs37 Hz −39%, better
Qts0.30 +7%
Vas28 L −15%, better
BL8.6 T·m −14%, worse
Xmax4.5 mm −22%, worse
Sensitivity88.5 dB −7.4, worse
B&C8MBX51
£113.58 · 6% less, betterFs60 Hz –
Qts0.29 +4%
Vas23 L −30%, better
BL11.4 T·m +14%, better
Xmax6 mm +3%
Sensitivity94.1 dB −1.8
MonacorSPH-225C
£122.71 · 2% moreFs39 Hz −36%, better
Qts0.30 +7%
Vas24 L −27%, better
BL13.2 T·m +32%, better
Xmax6 mm +3%
Sensitivity88.6 dB −7.3, worse
Scanspeak18W/8545K00
£144.00 · 20% more, worseFs28 Hz −54%, better
Qts0.28 –
Vas46.4 L +41%, worse
BL8.2 T·m −18%, worse
Xmax6.5 mm +12%, better
Sensitivity87.3 dB −8.6, worse
WavecorWF182BD08
£190.75 · 59% more, worseFs33 Hz −45%, better
Qts0.29 +4%
Vas32.4 L –
BL8.5 T·m −15%, worse
Xmax5.5 mm −5%
Sensitivity88.1 dB −7.8, worse
WavecorWF182BD03
£190.75 · 59% more, worseFs39 Hz −36%, better
Qts0.29 +4%
Vas24.4 L −26%, better
BL6.8 T·m −33%, worse
Xmax5.5 mm −5%
Sensitivity88.9 dB −7, worse
WavecorWF182BD16
£191.84 · 60% more, worseFs37 Hz −39%, better
Qts0.30 +7%
Vas23 L −30%, better
BL8.5 T·m −15%, worse
Xmax5.5 mm −5%
Sensitivity87.8 dB −8.1, worse
Eighteen Sound8CX401F
£199.68 · 66% more, worseFs56 Hz −8%
Qts0.34 +21%, worse
Vas23.9 L −28%, better
BL9.3 T·m −7%
Xmax5.8 mm –
Sensitivity92.5 dB −3.4, worse
B&C8CXN51
£224.51 · 87% more, worseFs68 Hz +11%, worse
Qts0.27 −4%
Vas17 L −48%, better
BL12.6 T·m +26%, better
Xmax6 mm +3%
Sensitivity94.7 dB −1.2
Beyma8CX300ND
£321.98 · 168% more, worseFs61 Hz –
Qts0.29 +4%
Vas23 L −30%, better
BL12 T·m +20%, better
Xmax6 mm +3%
Sensitivity94.4 dB −1.5
AccutonS220-6-222
£912.00 · 659% more, worseFs25 Hz −59%, better
Qts0.26 −7%
Vas89.7 L +172%, worse
BL10.9 T·m +9%
Xmax5.3 mm −9%
Sensitivity89.2 dB −6.7, worse
AccutonC220-6-222
£941.40 · 683% more, worseFs30 Hz −52%, better
Qts0.26 −7%
Vas74 L +124%, worse
BL11.7 T·m +17%, better
Xmax6 mm +3%
Sensitivity90.5 dB −5.4, worse
Audio Technology18 H 52 17 06 SD
No current priceFs36 Hz −41%, better
Qts0.28 –
Vas34 L +3%
BL6.6 T·m −34%, worse
Xmax6.3 mm +9%
Sensitivity88.8 dB −7.1, worse
WavecorWF182BD10
No current priceFs29 Hz −53%, better
Qts0.31 +11%, worse
Vas32.4 L –
BL6.5 T·m −35%, worse
Xmax5.5 mm −5%
Sensitivity85.7 dB −10.2, worse
WavecorWF182BD18
No current priceFs29 Hz −53%, better
Qts0.31 +11%, worse
Vas32.4 L –
BL6.5 T·m −35%, worse
Xmax5.5 mm −5%
Sensitivity85.7 dB −10.2, worse
KartesianWOM185_VKI
No current priceFs32 Hz −48%, better
Qts0.32 +14%, worse
Vas33.6 L –
BL10.2 T·m –
Xmax12 mm +107%, better
Sensitivity87.3 dB −8.6, worse
HiViSS8IIN
No current priceFs29 Hz −52%, better
Qts0.27 −4%
Vas80.1 L +143%, worse
BL10.6 T·m +6%
Xmax5 mm −14%, worse
Sensitivity90.3 dB −5.6, worse
WavecorWF182BD15
No current priceFs39 Hz −36%, better
Qts0.32 +14%, worse
Vas20.8 L −37%, better
BL8.5 T·m −15%, worse
Xmax5.5 mm −5%
Sensitivity87.8 dB −8.1, worse
WavecorWF182BD04
No current priceFs34 Hz −45%, better
Qts0.25 −11%, better
Vas32.4 L –
BL6.8 T·m −33%, worse
Xmax5.5 mm −5%
Sensitivity88.9 dB −7, worse
HiViSS8IIR
No current priceFs33 Hz −46%, better
Qts0.28 –
Vas59.6 L +81%, worse
BL9.2 T·m −8%
Xmax4.8 mm −17%, worse
Sensitivity90.7 dB −5.2, worse
Sica8 CX 2.5 PL P
No current priceFs74 Hz +21%, worse
Qts0.28 –
Vas16.2 L −51%, better
BL12.3 T·m +23%, better
Xmax5 mm −14%, worse
Sensitivity95.1 dB −0.8
No photo
PHL Audio2730
No current priceFs42 Hz −31%, better
Qts0.26 −7%
Vas34.1 L +3%
BL12.6 T·m +26%, better
Xmax7 mm +21%, better
Sensitivity91.7 dB −4.2, worse
CIAREHWB205
No current priceFs28 Hz −54%, better
Qts0.29 +4%
Vas79 L +139%, worse
BL9.3 T·m −7%
Xmax7 mm +21%, better
Sensitivity89.6 dB −6.3, worse
KartesianLOM185_VKI
No current priceFs40 Hz −34%, better
Qts0.25 −11%, better
Vas29 L −12%, better
BL10.4 T·m +4%
Xmax8 mm +38%, better
Sensitivity90.6 dB −5.3, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Thomann4.8 out of 512 ratings · Checked 23 Oct 2026Read reviews on Thomann
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 | £120.21, the lowest price | In stock | Visit shop at Lean Audio | |
Lean Business | £127.33 | 5.9% above the lowest price | Stock not listed | Visit shop at Lean Business |
Thomann | £170.00 | 41% above the lowest price | In stock | Visit shop at Thomann |
Best price over time
Tracked since 1 Apr
Recent changes
- 19 OctThomann£171.00 → £170.00Down 0.6% from £171.00
- 11 OctThomann£172.00 → £171.00Down 0.6% from £172.00
- 3 OctThomann£175.00 → £172.00Down 1.7% from £175.00