- Net volume
- 250L
- Tuning
- 33Hz
Eighteen Sound gives the volume and tuning; the port is sized for the driver when you open it.
21-inch LF driver · 1,800 W
Eighteen Sound 21NLW5300 8Ω
8 Ω · 30–500 Hz
No current price
- Fs
- 31Hz
- Xmax
- 15.3mm
- SPL
- 97dB
- Pe
- 1800W
- BL
- 31T·m
- Vd
- 2543cm³
- Qts
- 0.32
- Vas
- 325L
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 confidence744 selected pixels of 1,046
Published graphs
Eighteen Sound 21NLW5300 is a 21-inch 8 ohm LF driver rated at 1800 W RMS. The validated T/S data includes Fs 31 Hz, Qts 0.32, Vas 325 L, Xmax 15.3 mm, sensitivity 96.6 dB, plus 2543 cm³ Vd and 91 EBP. bits tracks vendor pricing, datasheet links, simulator import data, and similar drivers from the same loudspeaker database.
The published T/S values agree with each other
Thiele/Small
- Fs
- 31Hz
- Qts
- 0.32
- Qes
- 0.34
- Qms
- 4.7
- Vas
- 325L
- Re
- 5.2Ω
- Le
- 2.60mH
Motor and cone
- BL
- 31T·m
- Sd
- 1662cm²
- Mms
- 327g
- Xmax
- 15.3mm
- Vd †
- 2543cm³
Power and response
- Sensitivity †
- 96.6dB
- Manufacturer sensitivity
- 98.5dB
- Power
- 1800W
- Nominal power
- 1800W
- Impedance
- 8Ω
- Range
- 30–500Hz
- EBP †
- 91 · Sealed or vented
Size and mounting
- Diameter
- 545mm
- Cutout
- 492mm
- Bolt circle
- 520mm
- Depth
- 251mm
- Weight
- 14kg
Other published values
- Power Program
- 3600
Sensitivity shows 96.6 dB, calculated from the T/S values. Eighteen Sound publishes 98.5 dB, 1.9 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Eighteen Sound lists
LF · Primary · 21″
- BL
- 31T·m
- Fs
- 31Hz
- Le
- 2.60mH
- Re
- 5.2Ω
- Sd
- 1662cm²
- Mms
- 327g
- Qes
- 0.34
- Qms
- 4.7
- Qts
- 0.32
- SPL
- 96.6dB
- Vas
- 325L
- Xmax
- 15.3mm
- Power
- 1800W
- Impedance
- 8Ω
- Sensitivity
- 98.5dB
- Low limit
- 30Hz
- Nominal power
- 1800W
- Power Program
- 3600
- Calculated sensitivity †
- 96.6dB
- High limit
- 500Hz
- Manufacturer sensitivity
- 98.5dB
- Weight
- 14kg
- Diameter
- 545mm
- Depth
- 251mm
- Cutout
- 492mm
- Bolt circle
- 520mm
02
Designs
What Eighteen Sound suggests for the 21NLW5300. No published designs name it yet.
How we find designsEighteen Sound’s suggested box
From Eighteen Sound’s 21NLW5300 page
Open this box in 00 Simulator
Modelling the box in 00 Simulator…
03
Compare
Same-size drivers, compared with the 21NLW5300. Clear differences are green when better and red when worse.
This driver21NLW5300
Best price
–
Fs
31 Hz
Qts
0.32
Vas
325 L
BL
31 T·m
Xmax
15.3 mm
Sensitivity
96.6 dB
Power
1800 W
Dayton AudioPSS555-8
£194.48Fs28 Hz −11%, better
Qts0.33 +3%
Vas444 L +37%, worse
BL29.7 T·m −4%
Xmax11 mm −28%, worse
Sensitivity96.4 dB –
SB AudienceNERO-21SW1100D
£343.60Fs32 Hz +3%
Qts0.34 +6%
Vas312.6 L −4%
BL30 T·m −3%
Xmax12.2 mm −20%, worse
Sensitivity96.7 dB –
Eighteen Sound21LW2600
£425.60Fs27 Hz −13%, better
Qts0.33 +3%
Vas333 L –
BL32.5 T·m +5%
Xmax14.6 mm −5%
Sensitivity94.9 dB −1.7
CelestionTSQ2145
£445.00Fs30 Hz −3%
Qts0.34 +7%
Vas253.8 L −22%, better
BL33.8 T·m +9%
Xmax15 mm –
Sensitivity94.8 dB −1.8
RCFLF21X451
£448.61Fs28 Hz −10%
Qts0.37 +16%, worse
Vas385 L +18%, worse
BL30.5 T·m –
Xmax14 mm −8%
Sensitivity95.4 dB −1.2
Eighteen Sound21NLW4100
£456.79Fs36 Hz +16%, worse
Qts0.46 +44%, worse
Vas210 L −35%, better
BL29.4 T·m −5%
Xmax15.2 mm –
Sensitivity95 dB −1.6
B&C21SW115
£458.85Fs30 Hz −3%
Qts0.37 +16%, worse
Vas318 L –
BL30.1 T·m –
Xmax14 mm −8%
Sensitivity95.5 dB −1.1
Beyma21LEX1600ND
£475.00Fs30 Hz −3%
Qts0.29 −9%
Vas305 L −6%
BL36.6 T·m +18%, better
Xmax14 mm −8%
Sensitivity96.4 dB –
RCFLF21N451
£475.00Fs30 Hz −3%
Qts0.26 −19%, better
Vas375 L +15%, worse
BL34.5 T·m +11%, better
Xmax13 mm −15%, worse
Sensitivity97.8 dB +1.2
B&C21DS115
£475.59Fs34 Hz +10%
Qts0.27 −16%, better
Vas204 L −37%, better
BL39.3 T·m +27%, better
Xmax16.5 mm +8%
Sensitivity96.6 dB –
Beyma21QLEX1600FE
£493.97Fs30 Hz −3%
Qts0.28 −12%, better
Vas309 L −5%
BL36.4 T·m +17%, better
Xmax13 mm −15%, worse
Sensitivity96.5 dB –
B&C21SW152
£537.55Fs32 Hz +3%
Qts0.36 +12%, worse
Vas200 L −38%, better
BL39 T·m +26%, better
Xmax15 mm –
Sensitivity94.4 dB −2.2, worse
Eighteen Sound21NLW9001
£549.89Fs32 Hz +3%
Qts0.31 −3%
Vas244 L −25%, better
BL37 T·m +19%, better
Xmax14 mm −8%
Sensitivity95.7 dB −0.9
No photo
Precision DevicesPD.2155-1N
£555.00Fs33 Hz +6%
Qts0.36 +12%, worse
Vas241 L −26%, better
BL30 T·m −3%
Xmax14 mm −8%
Sensitivity95.7 dB −0.9
Eighteen Sound21NTLW5000
£595.00Fs31 Hz –
Qts0.36 +12%, worse
Vas270 L −17%, better
BL32 T·m +3%
Xmax17.5 mm +14%, better
Sensitivity95.3 dB −1.3
Eighteen Sound21NLW4000
£608.33Fs29 Hz −6%
Qts0.37 +16%, worse
Vas305 L −6%
BL30 T·m −3%
Xmax15 mm –
Sensitivity94.9 dB −1.7
Eighteen Sound21NLW9601
£623.80Fs37 Hz +19%, worse
Qts0.29 −9%
Vas175 L −46%, better
BL43 T·m +39%, better
Xmax14 mm −8%
Sensitivity96.6 dB –
No photo
Precision DevicesPD.2160-1N
£799.00Fs35 Hz +13%, worse
Qts0.30 −6%
Vas177 L −46%, better
BL43 T·m +39%, better
Xmax16 mm +5%
Sensitivity95.9 dB −0.7
FaitalPRO21XL3000
£899.00Fs30 Hz −3%
Qts0.25 −22%, better
Vas284.6 L −12%, better
BL43 T·m +39%, better
Xmax17.7 mm +15%, better
Sensitivity96.9 dB –
EminenceNSW6021-124
£916.36Fs31 Hz –
Qts0.32 –
Vas224.6 L −31%, better
BL30.5 T·m –
Xmax21 mm +37%, better
Sensitivity95 dB −1.6
No current price
Fs35 Hz +13%, worse
Qts0.34 +6%
Vas266 L −18%, better
BL31.3 T·m –
Xmax14 mm −8%
Sensitivity97.1 dB +0.5
No photo
Precision DevicesPD.2155-1F
No current priceFs35 Hz +13%, worse
Qts0.34 +6%
Vas266 L −18%, better
BL31.3 T·m –
Xmax14 mm −8%
Sensitivity97.1 dB +0.5
Eighteen Sound21LW2500
No current priceFs29 Hz −6%
Qts0.37 +16%, worse
Vas305 L −6%
BL30 T·m −3%
Xmax14 mm −8%
Sensitivity94.9 dB −1.7
CelestionNTR21-5010JD
No current priceFs32 Hz +4%
Qts0.32 –
Vas276.7 L −15%, better
BL33.9 T·m +9%
Xmax9 mm −41%, worse
Sensitivity96.4 dB –
No current price
Fs33 Hz +6%
Qts0.36 +12%, worse
Vas241 L −26%, better
BL30 T·m −3%
Xmax14 mm −8%
Sensitivity95.7 dB −0.9
B&C21SW150
No current priceFs29 Hz −6%
Qts0.26 −19%, better
Vas254 L −22%, better
BL32.6 T·m +5%
Xmax15 mm –
Sensitivity95.6 dB −1
Eighteen Sound21NLW9601C
No current priceFs38 Hz +23%, worse
Qts0.29 −9%
Vas140 L −57%, better
BL33.2 T·m +7%
Xmax14 mm −8%
Sensitivity96 dB −0.6
P.AudioSD21-125XB
No current priceFs35 Hz +13%, worse
Qts0.38 +19%, worse
Vas345.6 L +6%
BL30.4 T·m –
Xmax11.3 mm −26%, worse
Sensitivity97.7 dB +1.1
Sica21 S 4 PL
No current priceFs35 Hz +12%, worse
Qts0.30 −6%
Vas255 L −22%, better
BL36.1 T·m +16%, better
Xmax5.2 mm −66%, worse
Sensitivity97.4 dB +0.8
Dayton AudioPSS545HE-4
No current priceFs29 Hz −7%
Qts0.27 −16%, better
Vas212.2 L −35%, better
BL35.5 T·m +15%, better
Xmax21 mm +37%, better
Sensitivity94.6 dB −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
No current price found. Pricing may appear after the next vendor refresh.