- Net volume
- 4L
Eighteen Sound gives the volume only, not whether the box is sealed or vented.
6.5-inch LF driver · 200 W
Eighteen Sound 6NMB420 8Ω
8 Ω · 200–7000 Hz
£115.20
SteadyLean Business · All 2 offers
- Fs
- 110Hz
- Xmax
- 3mm
- SPL
- 95dB
- Pe
- 200W
- BL
- 9T·m
- Vd
- 39cm³
- Qts
- 0.33
- Vas
- 6L
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 confidence2,526 selected pixels of 2,956 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence1,549 selected pixels of 1,922
Published graphs
Eighteen Sound 6NMB420 is a 6.5-inch 8 ohm LF driver rated at 200 W RMS. The validated T/S data includes Fs 110 Hz, Qts 0.33, Vas 6.1 L, Xmax 3 mm, sensitivity 95.3 dB, plus 39 cm³ Vd and 289 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 £115.20.
The published T/S values agree with each other
Thiele/Small
- Fs
- 110Hz
- Qts
- 0.33
- Qes
- 0.38
- Qms
- 2.7
- Vas
- 6.1L
- Re
- 5.3Ω
- Le
- 0.10mH
Motor and cone
- BL
- 9T·m
- Sd
- 130cm²
- Mms
- 9g
- Xmax
- 3mm
- Vd †
- 39cm³
Power and response
- Sensitivity †
- 95.3dB
- Manufacturer sensitivity
- 100dB
- Power
- 200W
- Nominal power
- 200W
- Impedance
- 8Ω
- Range
- 200–7000Hz
- EBP †
- 289 · Leans vented
Size and mounting
- Diameter
- 162mm
- Cutout
- 148mm
- Bolt circle
- 170mm
- Depth
- 73mm
- Weight
- 1.3kg
Other published values
- Power Program
- 260
Sensitivity shows 95.3 dB, calculated from the T/S values. Eighteen Sound publishes 100.0 dB, 4.7 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Eighteen Sound lists
LF · Primary · 6.5″
- BL
- 9T·m
- Fs
- 110Hz
- Le
- 0.10mH
- Re
- 5.3Ω
- Sd
- 130cm²
- Mms
- 9g
- Qes
- 0.38
- Qms
- 2.7
- Qts
- 0.33
- SPL
- 95.3dB
- Vas
- 6.1L
- Xmax
- 3mm
- Power
- 200W
- Impedance
- 8Ω
- Sensitivity
- 100dB
- Low limit
- 200Hz
- Nominal power
- 200W
- Power Program
- 260
- Calculated sensitivity †
- 95.3dB
- High limit
- 7000Hz
- Manufacturer sensitivity
- 100dB
- Weight
- 1.3kg
- Diameter
- 162mm
- Depth
- 73mm
- Cutout
- 148mm
- Bolt circle
- 170mm
02
Designs
What Eighteen Sound suggests for the 6NMB420. No published designs name it yet.
How we find designsEighteen Sound’s suggested box
From Eighteen Sound’s 6NMB420 page
Open the 6NMB420 in 00 Simulator
03
Compare
Same-size drivers, compared with the 6NMB420. Clear differences are green when better and red when worse.
This driver6NMB420
Best price
£115.20
Fs
110 Hz
Qts
0.33
Vas
6.1 L
BL
9 T·m
Xmax
3 mm
Sensitivity
95.3 dB
Power
200 W
Dayton AudioDC160-8
£26.17 · 77% less, betterFs36 Hz −68%, better
Qts0.34 +3%
Vas17.9 L +193%, worse
BL10.7 T·m +19%, better
Xmax3.1 mm +5%
Sensitivity85.3 dB −10, worse
LavoceWSF061.52
£26.27 · 77% less, betterFs91 Hz −17%, better
Qts0.34 +3%
Vas6.6 L +9%
BL10.8 T·m +20%, better
Xmax3.8 mm +27%, better
Sensitivity93.4 dB −1.9
Beyma6CMV2
£40.92 · 64% less, betterFs90 Hz −18%, better
Qts0.34 +3%
Vas6.5 L +7%
BL9.4 T·m +4%
Xmax5.7 mm +90%, better
Sensitivity92.3 dB −3, worse
HiViF6
£41.82 · 64% less, betterFs45 Hz −59%, better
Qts0.35 +6%
Vas16.4 L +169%, worse
BL9 T·m –
Xmax4.3 mm +43%, better
Sensitivity88 dB −7.3, worse
WavecorWF146WA06
£53.11 · 54% less, betterFs40 Hz −64%, better
Qts0.36 +9%
Vas16.6 L +172%, worse
BL6.3 T·m −30%, worse
Xmax3 mm –
Sensitivity86.5 dB −8.8, worse
CIAREFXI6
£62.80 · 45% less, betterFs70 Hz −36%, better
Qts0.33 –
Vas8 L +31%, worse
BL10.6 T·m +18%, better
Xmax5.3 mm +77%, better
Sensitivity90.7 dB −4.6, worse
PRV Audio6MB550FT
£67.26 · 42% less, betterFs85 Hz −23%, better
Qts0.34 +3%
Vas8.2 L +35%, worse
BL9.8 T·m +9%
Xmax5.4 mm +80%, better
Sensitivity93.3 dB −2, worse
FaitalPRO6PR160
£82.89 · 28% less, betterFs90 Hz −18%, better
Qts0.33 –
Vas5.9 L −3%
BL11 T·m +22%, better
Xmax5 mm +67%, better
Sensitivity92.9 dB −2.4, worse
FaitalPRO6PR122
£84.13 · 27% less, betterFs110 Hz –
Qts0.39 +18%, worse
Vas4.7 L −23%, better
BL10.5 T·m +17%, better
Xmax2.8 mm −8%
Sensitivity93.6 dB −1.7
FaitalPRO6PR150
£85.46 · 26% less, betterFs100 Hz −9%
Qts0.34 +3%
Vas4.9 L −20%, better
BL11.6 T·m +29%, better
Xmax2.6 mm −12%, worse
Sensitivity93.5 dB −1.8
B&C6PEV13
£86.62 · 25% less, betterFs126 Hz +15%, worse
Qts0.36 +9%
Vas6 L –
BL8.2 T·m −9%
Xmax2.5 mm −17%, worse
Sensitivity96.9 dB +1.6
B&C6PS44
£86.62 · 25% less, betterFs71 Hz −35%, better
Qts0.33 –
Vas7 L +15%, worse
BL11 T·m +22%, better
Xmax4.5 mm +50%, better
Sensitivity90.7 dB −4.6, worse
Beyma6G40ND
£96.25 · 16% less, betterFs100 Hz −9%
Qts0.38 +15%, worse
Vas3.7 L −39%, better
BL10.6 T·m +18%, better
Xmax3 mm –
Sensitivity91.2 dB −4.1, worse
Scanspeak15M/8631G00
£167.42 · 45% more, worseFs42 Hz −62%, better
Qts0.35 +6%
Vas16.2 L +166%, worse
BL6.8 T·m −24%, worse
Xmax3 mm –
Sensitivity87.1 dB −8.2, worse
AccutonC173-6-191
£325.80 · 183% more, worseFs39 Hz −65%, better
Qts0.34 +3%
Vas21.6 L +254%, worse
BL8.8 T·m –
Xmax5 mm +67%, better
Sensitivity87.3 dB −8, worse
Eighteen Sound6NMB900
No current priceFs95 Hz −14%, better
Qts0.32 −3%
Vas10.3 L +69%, worse
BL8.5 T·m −6%
Xmax3 mm –
Sensitivity95.9 dB +0.6
PurifiPTT6.5M04-NFA-01
No current priceFs55 Hz −50%, better
Qts0.33 –
Vas11.7 L +92%, worse
BL8.1 T·m −10%, worse
Xmax2.9 mm −3%
Sensitivity89.4 dB −5.9, worse
PurifiPTT6.5M08-NFA-01
No current priceFs52 Hz −53%, better
Qts0.34 +3%
Vas13.2 L +116%, worse
BL9.8 T·m +9%
Xmax2.9 mm −3%
Sensitivity89 dB −6.3, worse
Sica6 N 2 PL
No current priceFs68 Hz −38%, better
Qts0.33 –
Vas8.7 L +43%, worse
BL9.5 T·m +6%
Xmax3.5 mm +17%, better
Sensitivity90.8 dB −4.5, worse
PRV Audio6MB550FT-4
No current priceFs86 Hz −22%, better
Qts0.34 +3%
Vas6.6 L +8%
BL8.6 T·m −4%
Xmax5.4 mm +80%, better
Sensitivity92.9 dB −2.4, worse
REDCATT61NPM
No current priceFs92 Hz −16%, better
Qts0.36 +9%
Vas7 L +15%, worse
BL9.8 T·m +9%
Xmax2.3 mm −23%, worse
Sensitivity93.6 dB −1.7
Oberton6NCX
No current priceFs89 Hz −19%, better
Qts0.36 +10%, worse
Vas7.0 L +15%, worse
BL9 T·m –
Xmax4.8 mm +58%, better
Sensitivity93.1 dB −2.2, worse
PurifiPTT6.5M08-NAA-08
No current priceFs38 Hz −65%, better
Qts0.31 −6%
Vas21.6 L +254%, worse
BL9.6 T·m +7%
Xmax2.9 mm −3%
Sensitivity87.6 dB −7.7, worse
HiViD5.8B
No current priceFs52 Hz −53%, better
Qts0.37 +12%, worse
Vas5.6 L −8%
BL9 T·m –
Xmax4.8 mm +60%, better
Sensitivity84.8 dB −10.5, worse
HiViD6.4MKII
No current priceFs53 Hz −52%, better
Qts0.35 +6%
Vas8.5 L +39%, worse
BL7.8 T·m −13%, worse
Xmax3.5 mm +17%, better
Sensitivity86.9 dB −8.4, worse
Sica5.5 C 1.5 CP
No current priceFs62 Hz −44%, better
Qts0.31 −6%
Vas5.4 L −11%, better
BL7.9 T·m −12%, worse
Xmax4 mm +33%, better
Sensitivity87.8 dB −7.5, worse
No photo
PHL Audio1752NDU
No current priceFs119 Hz +8%
Qts0.30 −9%
Vas4.4 L −28%, better
BL11.9 T·m +32%, better
Xmax3 mm –
Sensitivity95.5 dB –
BMS6CN160
No current priceFs79 Hz −28%, better
Qts0.34 +3%
Vas8.9 L +46%, worse
BL10 T·m +11%, better
Xmax5 mm +67%, better
Sensitivity92.7 dB −2.6, worse
LavoceWSN061.52
No current priceFs90 Hz −18%, better
Qts0.39 +18%, worse
Vas5.9 L –
BL9.9 T·m +10%
Xmax3.8 mm +27%, better
Sensitivity92.1 dB −3.2, worse
SB AcousticsSB17BAC35-8-COAX
No current priceFs35 Hz −68%, better
Qts0.33 –
Vas33.1 L +443%, worse
BL5.7 T·m −37%, worse
Xmax3.1 mm +3%
Sensitivity88.1 dB −7.2, 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 Business | £115.20, the lowest price | Stock not listed | Visit shop at Lean Business |
Best price over time
Tracked since 2 Apr