- Net volume
- 6L
- Tuning
- 100Hz
Eighteen Sound gives the volume and tuning; the port is sized for the driver when you open it.
6.5-inch LF driver · 200 W
Eighteen Sound 6NMB900 8Ω
200–7000 Hz
No price for delivery to the UK
- Fs
- 95Hz
- Xmax
- 3mm
- SPL
- 96dB
- Pe
- 200W
- BL
- 8.5T·m
- Vd
- 39cm³
- Qts
- 0.32
- Vas
- 10L
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 1 trace
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 confidence1,765 selected pixels of 1,977
Published graphs
Eighteen Sound 6NMB900 is a 6.5-inch 8 ohm LF driver rated at 200 W RMS. The validated T/S data includes Fs 95 Hz, Qts 0.32, Vas 10.3 L, Xmax 3 mm, sensitivity 95.9 dB, plus 39 cm³ Vd and 264 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 £157.92.
The published T/S values agree with each other
Thiele/Small
- Fs
- 95Hz
- Qts
- 0.32
- Qes
- 0.36
- Qms
- 2.9
- Vas
- 10.3L
- Re
- 5.2Ω
- Le
- 0.10mH
Motor and cone
- BL
- 8.5T·m
- Sd
- 130cm²
- Mms
- 7g
- Xmax
- 3mm
- Vd †
- 39cm³
Power and response
- Sensitivity †
- 95.9dB
- Manufacturer sensitivity
- 97dB
- Power
- 200W
- Nominal power
- 200W
- Impedance
- 8Ω
- Range
- 200–7000Hz
- EBP †
- 264 · 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 95.9 dB, calculated from the T/S values. Eighteen Sound publishes 97.0 dB, 1.1 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Eighteen Sound lists
LF · Primary · 6.5″
- BL
- 8.5T·m
- Fs
- 95Hz
- Le
- 0.10mH
- Re
- 5.2Ω
- Sd
- 130cm²
- Mms
- 7g
- Qes
- 0.36
- Qms
- 2.9
- Qts
- 0.32
- SPL
- 95.9dB
- Vas
- 10.3L
- Xmax
- 3mm
- Power
- 200W
- Impedance
- 8Ω
- Sensitivity
- 97dB
- Low limit
- 200Hz
- Nominal power
- 200W
- Power Program
- 260
- Calculated sensitivity †
- 95.9dB
- High limit
- 7000Hz
- Manufacturer sensitivity
- 97dB
- Weight
- 1.3kg
- Diameter
- 162mm
- Depth
- 73mm
- Cutout
- 148mm
- Bolt circle
- 170mm
02
Designs
What Eighteen Sound suggests for the 6NMB900. No published designs name it yet.
How we find designsEighteen Sound’s suggested box
From Eighteen Sound’s 6NMB900 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 6NMB900. Clear differences are green when better and red when worse.
This driver6NMB900
Best price
£157.92
Fs
95 Hz
Qts
0.32
Vas
10.3 L
BL
8.5 T·m
Xmax
3 mm
Sensitivity
95.9 dB
Power
200 W
Dayton AudioDCS165-4
£48.61 · 69% less, betterFs36 Hz −62%, better
Qts0.34 +6%
Vas12.1 L +17%, worse
BL9.2 T·m +8%
Xmax6 mm +100%, better
Sensitivity83.9 dB −12, worse
HiViE6.5
£63.57 · 60% less, betterFs37 Hz −61%, better
Qts0.32 –
Vas31 L +201%, worse
BL8.1 T·m −5%
Xmax5.8 mm +92%, better
Sensitivity88.3 dB −7.6, worse
PRV Audio6MB550FT
£67.26 · 57% less, betterFs85 Hz −11%, better
Qts0.34 +6%
Vas8.2 L −20%, better
BL9.8 T·m +15%, better
Xmax5.4 mm +80%, better
Sensitivity93.3 dB −2.6, worse
B&C6PEV13
£74.52 · 53% less, betterFs126 Hz +33%, worse
Qts0.36 +12%, worse
Vas6 L −42%, better
BL8.2 T·m −4%
Xmax2.5 mm −17%, worse
Sensitivity96.9 dB +1
Dayton AudioMX6-22
£75.32 · 52% less, betterFs30 Hz −68%, better
Qts0.33 +3%
Vas10 L –
BL12.3 T·m +45%, better
Xmax12 mm +300%, better
Sensitivity80.7 dB −15.2, worse
WavecorWF152BD13
£98.00 · 38% less, betterFs50 Hz −47%, better
Qts0.33 +3%
Vas9.2 L −11%, better
BL6.3 T·m −25%, worse
Xmax4.5 mm +50%, better
Sensitivity87.3 dB −8.6, worse
Eighteen Sound6NMB420
£115.20 · 27% less, betterFs110 Hz +16%, worse
Qts0.33 +3%
Vas6.1 L −41%, better
BL9 T·m +6%
Xmax3 mm –
Sensitivity95.3 dB −0.6
WavecorWF152BD04
£142.76 · 10% less, betterFs50 Hz −47%, better
Qts0.31 −3%
Vas11.4 L +11%, worse
BL7.3 T·m −14%, worse
Xmax4.5 mm +50%, better
Sensitivity88.4 dB −7.5, worse
SB AcousticsMR16PNW-8
£159.05 · Same priceFs31 Hz −67%, better
Qts0.32 –
Vas44.8 L +335%, worse
BL6.5 T·m −24%, worse
Xmax3.1 mm +3%
Sensitivity88 dB −7.9, worse
Scanspeak15M/8631G00
£167.42 · 6% more, worseFs42 Hz −56%, better
Qts0.35 +9%
Vas16.2 L +57%, worse
BL6.8 T·m −20%, worse
Xmax3 mm –
Sensitivity87.1 dB −8.8, worse
SB AcousticsMT19CP-8
£234.41 · 48% more, worseFs43 Hz −55%, better
Qts0.31 −3%
Vas37.1 L +260%, worse
BL8.1 T·m −5%
Xmax3.6 mm +20%, better
Sensitivity91.5 dB −4.4, worse
SB AcousticsMR16TX-8
£249.00 · 58% more, worseFs35 Hz −63%, better
Qts0.31 −3%
Vas38.9 L +278%, worse
BL6.6 T·m −22%, worse
Xmax2.9 mm −5%
Sensitivity89.2 dB −6.7, worse
PurifiPTT6.5M04-NFA-01
No current priceFs55 Hz −42%, better
Qts0.33 +3%
Vas11.7 L +14%, worse
BL8.1 T·m −5%
Xmax2.9 mm −3%
Sensitivity89.4 dB −6.5, worse
Sica6 N 2 PL
No current priceFs68 Hz −28%, better
Qts0.33 +3%
Vas8.7 L −16%, better
BL9.5 T·m +12%, better
Xmax3.5 mm +17%, better
Sensitivity90.8 dB −5.1, worse
PurifiPTT6.5M08-NFA-01
No current priceFs52 Hz −45%, better
Qts0.34 +6%
Vas13.2 L +28%, worse
BL9.8 T·m +15%, better
Xmax2.9 mm −3%
Sensitivity89 dB −6.9, worse
Beyma6CX200FE
No current priceFs65 Hz −32%, better
Qts0.32 –
Vas10.5 L –
BL9.2 T·m +8%
Xmax5 mm +67%, better
Sensitivity91.3 dB −4.6, worse
WavecorWF152BD08
No current priceFs46 Hz −52%, better
Qts0.35 +9%
Vas11.5 L +12%, worse
BL8 T·m −6%
Xmax4.5 mm +50%, better
Sensitivity87 dB −8.9, worse
WavecorWF152BD16
No current priceFs46 Hz −52%, better
Qts0.35 +9%
Vas11.5 L +12%, worse
BL8 T·m −6%
Xmax4.5 mm +50%, better
Sensitivity87 dB −8.9, worse
HiViD6.4MKII
No current priceFs53 Hz −44%, better
Qts0.35 +9%
Vas8.5 L −17%, better
BL7.8 T·m −8%
Xmax3.5 mm +17%, better
Sensitivity86.9 dB −9, worse
PurifiPTT6.5M08-NAA-08
No current priceFs38 Hz −60%, better
Qts0.31 −3%
Vas21.6 L +110%, worse
BL9.6 T·m +13%, better
Xmax2.9 mm −3%
Sensitivity87.6 dB −8.3, worse
Sica6 NR 2 PL
No current priceFs61 Hz −36%, better
Qts0.33 +3%
Vas9.4 L −9%
BL9.9 T·m +16%, better
Xmax4 mm +33%, better
Sensitivity89.9 dB −6, worse
PRV Audio6MB550FT-4
No current priceFs86 Hz −9%
Qts0.34 +6%
Vas6.6 L −36%, better
BL8.6 T·m –
Xmax5.4 mm +80%, better
Sensitivity92.9 dB −3, worse
Acoustic EleganceTD6M-8
No current priceFs76 Hz −20%, better
Qts0.27 −16%, better
Vas9.2 L −11%, better
BL10.6 T·m +25%, better
Xmax3 mm –
Sensitivity93.5 dB −2.4, worse
BMS6CN160
No current priceFs79 Hz −17%, better
Qts0.34 +6%
Vas8.9 L −14%, better
BL10 T·m +18%, better
Xmax5 mm +67%, better
Sensitivity92.7 dB −3.2, worse
Tang BandW6-1914SB
No current priceFs70 Hz −26%, better
Qts0.35 +9%
Vas11.1 L +8%
BL10.2 T·m +20%, better
Xmax0.5 mm −83%, worse
Sensitivity92.2 dB −3.7, worse
WavecorWF152BD05
No current priceFs50 Hz −47%, better
Qts0.33 +3%
Vas9.2 L −11%, better
BL6.3 T·m −25%, worse
Xmax4.5 mm +50%, better
Sensitivity87.3 dB −8.6, worse
SB AcousticsSB17BAC35-8-COAX
No current priceFs35 Hz −63%, better
Qts0.33 +3%
Vas33.1 L +221%, worse
BL5.7 T·m −33%, worse
Xmax3.1 mm +3%
Sensitivity88.1 dB −7.8, worse
WavecorWF182BD15
No current priceFs39 Hz −59%, better
Qts0.32 –
Vas20.8 L +102%, worse
BL8.5 T·m –
Xmax5.5 mm +83%, better
Sensitivity87.8 dB −8.1, worse
WavecorWF152BD10
No current priceFs49 Hz −48%, better
Qts0.32 –
Vas9.6 L −7%
BL5.8 T·m −32%, worse
Xmax4.5 mm +50%, better
Sensitivity87.4 dB −8.5, worse
Sica5.5 C 1.5 CP
No current priceFs62 Hz −35%, better
Qts0.31 −3%
Vas5.4 L −48%, better
BL7.9 T·m −7%
Xmax4 mm +33%, better
Sensitivity87.8 dB −8.1, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
None of the shops we track lists delivery to the UK at checkout.