CIAREFXI8
£68.98Fs81 Hz +17%, worse
Qts0.29 +4%
Vas13 L +26%, worse
BL13.3 T·m −31%, worse
Xmax4.5 mm +11%, better
Sensitivity95.4 dB +2.7, better
8-inch LF driver · 76 mm voice coil · 200 W
REDCATT 81NPM-2 8Ω
8 Ω
No current price
- Fs
- 69Hz
- Xmax
- 4.0mm
- SPL
- 93dB
- Pe
- 200W
- BL
- 19.3T·m
- Vd
- 89cm³
- Qts
- 0.28
- Vas
- 10L
REDCATT 81NPM-2 is an 8-inch 8 ohm LF driver rated at 200 W RMS. The validated T/S data includes Fs 69 Hz, Qts 0.28, Vas 10.3 L, Xmax 4.0 mm, sensitivity 92.7 dB, plus 89 cm³ Vd and 238 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
- 69Hz
- Qts
- 0.28
- Qes
- 0.29
- Qms
- 4.8
- Vas
- 10.3L
- Re
- 7.4Ω
- Le
- 0.75mH
Motor and cone
- BL
- 19.3T·m
- Sd
- 219cm²
- Mms
- 34g
- Xmax
- 4.0mm
- Vd †
- 89cm³
- Voice coil
- 76mm
Power and response
- Sensitivity †
- 92.7dB
- Manufacturer sensitivity
- 93.1dB
- Power
- 200W
- Impedance
- 8Ω
- EBP †
- 238 · Leans vented
Size and mounting
- Diameter
- 210mm
- Cutout
- 186.9mm
- Bolt circle
- 195.5mm
- Weight
- 3.2kg
Other published values
- Xmech
- 14.55
- Power Peak
- 800
Other dimensions
- Mounting Depth
- 101.3
† Calculated by bits from the published values
What this validation status means
Everything else REDCATT lists
LF · Primary · 8″
- BL
- 19.3T·m
- Fs
- 69Hz
- Le
- 0.75mH
- Re
- 7.4Ω
- Sd
- 219cm²
- Mms
- 34g
- Qes
- 0.29
- Qms
- 4.8
- Qts
- 0.28
- SPL
- 92.7dB
- Vas
- 10.3L
- Xmax
- 4.0mm
- Xmech
- 14.55
- Power
- 200W
- Impedance
- 8Ω
- Power Peak
- 800
- Sensitivity
- 93.1dB
- Calculated sensitivity †
- 92.7dB
- Manufacturer sensitivity
- 93.1dB
- Voice coil
- 76mm
- Weight
- 3.2kg
- Diameter
- 210mm
- Mounting Depth
- 101.3
- Cutout
- 186.9mm
- Bolt circle
- 195.5mm
02
Compare
Same-size drivers, compared with the 81NPM-2. Clear differences are green when better and red when worse.
This driver81NPM-2
Best price
–
Fs
69 Hz
Qts
0.28
Vas
10.3 L
BL
19.3 T·m
Xmax
4.0 mm
Sensitivity
92.7 dB
Power
200 W
Beyma8WRS300
£75.85Fs65 Hz −6%
Qts0.28 –
Vas15 L +46%, worse
BL15.2 T·m −21%, worse
Xmax6 mm +48%, better
Sensitivity93.4 dB +0.7
Beyma8WR300
£91.82Fs65 Hz −6%
Qts0.27 −4%
Vas15 L +46%, worse
BL15.5 T·m −20%, worse
Xmax6 mm +48%, better
Sensitivity93.6 dB +0.9
B&C8NDL64
£122.94Fs80 Hz +16%, worse
Qts0.25 −11%, better
Vas9.6 L −7%
BL17.5 T·m −9%
Xmax4.5 mm +11%, better
Sensitivity95 dB +2.3, better
Sica8 FE 2.5 CP
£132.29Fs73 Hz +6%
Qts0.28 –
Vas15.6 L +51%, worse
BL13.0 T·m −33%, worse
Xmax4 mm –
Sensitivity95.1 dB +2.4, better
BMS8S215
£137.66Fs88 Hz +27%, worse
Qts0.31 +11%, worse
Vas11.0 L +7%
BL13.6 T·m −30%, worse
Xmax4.3 mm +5%
Sensitivity95.6 dB +2.9, better
CelestionFTX0820
£139.00Fs79 Hz +14%, worse
Qts0.28 –
Vas13.1 L +27%, worse
BL14.6 T·m −25%, worse
Xmax4 mm –
Sensitivity95.2 dB +2.5, better
LavoceWAN082.02
£149.92Fs80 Hz +16%, worse
Qts0.23 −18%, better
Vas9.0 L −13%, better
BL17.8 T·m −8%
Xmax5.8 mm +43%, better
Sensitivity94.7 dB +2, better
Sica8 K 3 PL
£161.36Fs68 Hz –
Qts0.25 −11%, better
Vas12.2 L +18%, worse
BL16.1 T·m −17%, worse
Xmax5 mm +23%, better
Sensitivity93.6 dB +0.9
MonacorFTX0820/8
£164.34Fs79 Hz +14%, worse
Qts0.28 –
Vas13.1 L +27%, worse
BL14.6 T·m −25%, worse
Xmax4 mm –
Sensitivity95.2 dB +2.5, better
Eighteen Sound8NTLW2000
£168.45Fs74 Hz +7%
Qts0.26 −7%
Vas11.3 L +10%
BL22.4 T·m +16%, better
Xmax4.4 mm +9%
Sensitivity94.3 dB +1.6
BMS8N515
£171.89Fs88 Hz +27%, worse
Qts0.30 +7%
Vas11.0 L +7%
BL13.8 T·m −28%, worse
Xmax4 mm –
Sensitivity95.7 dB +3, better
FaitalPRO8HX200
£254.42Fs76 Hz +10%, worse
Qts0.30 +7%
Vas13.1 L +27%, worse
BL13.8 T·m −28%, worse
Xmax4.9 mm +21%, better
Sensitivity94.7 dB +2, better
Eighteen Sound8NMB750
£256.89Fs88 Hz +28%, worse
Qts0.27 −4%
Vas6.9 L −33%, better
BL18.7 T·m −3%
Xmax6.1 mm +51%, better
Sensitivity94.3 dB +1.6
BMS8CN552
£262.59Fs88 Hz +27%, worse
Qts0.29 +4%
Vas10.1 L –
BL13.4 T·m −30%, worse
Xmax4 mm –
Sensitivity95.6 dB +2.9, better
P.Audio8NX-65MB
No current priceFs80 Hz +16%, worse
Qts0.29 +4%
Vas8.2 L −20%, better
BL18 T·m −7%
Xmax3.8 mm −7%
Sensitivity93.3 dB +0.6
Oberton8NM250V2
No current priceFs68 Hz –
Qts0.25 −10%, better
Vas8.4 L −19%, better
BL21.3 T·m +10%, better
Xmax4 mm –
Sensitivity92.1 dB −0.6
Eighteen Sound8NCX750
No current priceFs111 Hz +61%, worse
Qts0.26 −7%
Vas5.2 L −50%, better
BL20 T·m +4%
Xmax4 mm –
Sensitivity96.2 dB +3.5, better
REDCATT8NPM
No current priceFs79 Hz +14%, worse
Qts0.29 +4%
Vas10.9 L +6%
BL14.2 T·m −26%, worse
Xmax3.7 mm −9%
Sensitivity94.4 dB +1.7
PRV Audio8MR600X-NDY
No current priceFs88 Hz +27%, worse
Qts0.29 +4%
Vas12.6 L +22%, worse
BL15.2 T·m −21%, worse
Xmax3.8 mm −7%
Sensitivity96.5 dB +3.8, better
Oberton8NMB250V4
No current priceFs82 Hz +19%, worse
Qts0.26 −8%
Vas10.9 L +6%
BL14.3 T·m −26%, worse
Xmax4.5 mm +11%, better
Sensitivity95.5 dB +2.8, better
No photo
PHL Audio2510
No current priceFs72 Hz +4%
Qts0.24 −14%, better
Vas13.3 L +29%, worse
BL23 T·m +19%, better
Xmax4 mm –
Sensitivity95 dB +2.3, better
Acoustic EleganceTD8M-8
No current priceFs76 Hz +10%, worse
Qts0.26 −7%
Vas11.3 L +10%
BL15.5 T·m −20%, worse
Xmax3 mm −26%, worse
Sensitivity94.6 dB +1.9
Eighteen Sound8NTLW2500
No current priceFs76 Hz +10%, worse
Qts0.30 +7%
Vas7.6 L −26%, better
BL18.1 T·m −6%
Xmax7.6 mm +88%, better
Sensitivity92.3 dB –
Dayton Audio8MB200N-8
No current priceFs94 Hz +36%, worse
Qts0.32 +14%, worse
Vas8.8 L −15%, better
BL14.4 T·m −25%, worse
Xmax3.9 mm −3%
Sensitivity95.2 dB +2.5, better
No photo
PHL Audio2513NDU
No current priceFs70 Hz –
Qts0.23 −18%, better
Vas12.5 L +21%, worse
BL24 T·m +24%, better
Xmax4 mm –
Sensitivity94.5 dB +1.8
Oberton8NM201
No current priceFs103 Hz +49%, worse
Qts0.29 –
Vas8.1 L −22%, better
BL13.7 T·m −29%, worse
Xmax2.8 mm −32%, worse
Sensitivity96.8 dB +4.1, better
Oberton8MVCX (8NMB250VCX)
No current priceFs85 Hz +23%, worse
Qts0.16 −41%, better
Vas10.7 L +3%
BL17.8 T·m −8%
Xmax4.3 mm +5%
Sensitivity98 dB +5.3, better
RCFMB8N251
No current priceFs68 Hz –
Qts0.25 −11%, better
Vas13 L +26%, worse
BL15.2 T·m −21%, worse
Xmax5 mm +23%, better
Sensitivity94 dB +1.3
REDCATT81NPM-1
No current priceFs72 Hz +4%
Qts0.33 +18%, worse
Vas10.3 L –
BL16.7 T·m −13%, worse
Xmax6 mm +48%, better
Sensitivity92.6 dB –
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.