MonacorSPM-200X/4
£26.28Fs89 Hz −29%, better
Qts0.97 −46%, better
Vas14.9 L +31%, worse
BL3.9 T·m −17%, worse
Xmax1 mm –
Sensitivity90.4 dB −2.6, worse
8-inch LF driver · Vintage Ceramic series · 25 mm voice coil · 25 W
Jensen C8R-8 8Ω
8 Ω
No current price
- Fs
- 126Hz
- Xmax
- 1mm
- SPL
- 93dB
- Pe
- 25W
- BL
- 4.7T·m
- Vd
- 21cm³
- Qts
- 1.80
- Vas
- 11L
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 reproduce manufacturer-provided structured chart data, not Bits measurements or pixel digitizations. How provenance works
- Trace jensen-structured-response/v1
C8R - 8 ohm – SPL
Frequency response
121 plotted pointsManufacturer structured chart dataSource payload SHA-256 8ab2cf26f4f6…Series C8R - 8 ohmHigh confidence - Trace jensen-structured-response/v1
C8R - 8 ohm – free-air impedance
Impedance response
121 plotted pointsManufacturer structured chart dataSource payload SHA-256 8ab2cf26f4f6…Series C8R - 8 ohmHigh confidence
Jensen C8R-8 is an 8-inch 8 ohm LF driver rated at 25 W RMS. The validated T/S data includes Fs 126 Hz, Qts 1.80, Vas 11.4 L, Xmax 1 mm, sensitivity 93 dB, plus 21 cm³ Vd. bits tracks vendor pricing, datasheet links, simulator import data, and similar drivers from the same loudspeaker database.
Partial source evidence
Automated T/S checks passed, but some material low-frequency parameters are not published for this record.
Material fields not published: Qes
- Manufacturer page linked
- Datasheet linked
- Canonical units normalized for comparison
- Vd can be derived from Sd and Xmax
Thiele/Small
- Fs
- 126Hz
- Qts
- 1.80
- Qms
- 10.3
- Vas
- 11.4L
- Re
- 6.7Ω
- Le
- 0.43mH
Motor and cone
- BL
- 4.7T·m
- Sd
- 214cm²
- Mms
- 9g
- Xmax
- 1mm
- Vd †
- 21cm³
- Voice coil
- 25mm
- Flux density
- 1T
Power and response
- Sensitivity
- 93dB
- Power
- 25W
- Nominal power
- 25W
- Impedance
- 8Ω
Size and mounting
- Diameter
- 207mm
- Weight
- 1kg
Other published values
- Cms
- 0.18mm/N
- Power Program
- 50
† Calculated by bits from the published values
What this validation status means
Everything else Jensen lists
LF · Primary · 8″
- BL
- 4.7T·m
- Fs
- 126Hz
- Le
- 0.43mH
- Re
- 6.7Ω
- Sd
- 214cm²
- Cms
- 0.18mm/N
- Mms
- 9g
- Qms
- 10.3
- Qts
- 1.80
- SPL
- 93dB
- Vas
- 11.4L
- Xmax
- 1mm
- Power
- 25W
- Impedance
- 8Ω
- Flux density
- 1T
- Sensitivity
- 93dB
- Nominal power
- 25W
- Power Program
- 50
- Manufacturer sensitivity
- 93dB
- Voice coil
- 25mm
- Weight
- 1kg
- Diameter
- 207mm
02
Compare
Same-size drivers, compared with the C8R-8. Clear differences are green when better and red when worse.
This driverC8R-8
Best price
–
Fs
126 Hz
Qts
1.80
Vas
11.4 L
BL
4.7 T·m
Xmax
1 mm
Sensitivity
93 dB
Power
25 W
Dayton AudioRS180P-4
£60.50Fs38 Hz −70%, better
Qts0.39 −78%, better
Vas27.3 L +139%, worse
BL4.7 T·m –
Xmax6 mm +500%, better
Sensitivity86.9 dB −6.1, worse
Dayton AudioRS180-4
£70.44Fs38 Hz −70%, better
Qts0.46 −74%, better
Vas21.2 L +86%, worse
BL4.7 T·m –
Xmax6 mm +500%, better
Sensitivity85.1 dB −7.9, worse
LavoceWAF082.00
£71.42Fs78 Hz −38%, better
Qts0.37 −79%, better
Vas11.9 L +5%
BL12.5 T·m +166%, better
Xmax6.3 mm +530%, better
Sensitivity93.4 dB –
Beyma8MI100
£73.79Fs90 Hz −29%, better
Qts0.45 −75%, better
Vas12 L +5%
BL11.5 T·m +145%, better
Xmax3 mm +200%, better
Sensitivity94.6 dB +1.6
LavoceMAF082.00
£75.44Fs85 Hz −33%, better
Qts0.20 −89%, better
Vas11.3 L –
BL17.2 T·m +266%, better
Xmax2.6 mm +160%, better
Sensitivity97 dB +4, better
B&C8NW51
£120.85Fs74 Hz −41%, better
Qts0.17 −91%, better
Vas11 L −4%
BL18.9 T·m +302%, better
Xmax6 mm +500%, better
Sensitivity95.7 dB +2.7, better
BMS8S215
£137.66Fs88 Hz −30%, better
Qts0.31 −83%, better
Vas11.0 L −3%
BL13.6 T·m +189%, better
Xmax4.3 mm +325%, better
Sensitivity95.6 dB +2.6, better
BMS8N515
£171.89Fs88 Hz −30%, better
Qts0.30 −83%, better
Vas11.0 L −3%
BL13.8 T·m +194%, better
Xmax4 mm +300%, better
Sensitivity95.7 dB +2.7, better
Scanspeak18M/4631T00
£194.91Fs65 Hz −48%, better
Qts0.60 −67%, better
Vas14 L +23%, worse
BL5.6 T·m +19%, better
Xmax3 mm +200%, better
Sensitivity89.6 dB −3.4, worse
JensenMOD8-20-8
No current priceFs119 Hz −5%
Qts2.24 +24%, worse
Vas11.1 L –
BL4.5 T·m −5%
Xmax1 mm –
Sensitivity93.2 dB –
JensenC8R-4
No current priceFs131 Hz +4%
Qts1.42 −21%, better
Vas10.3 L −10%
BL3.8 T·m −20%, worse
Xmax1 mm –
Sensitivity92.3 dB −0.7
JensenP8R-8
No current priceFs135 Hz +7%
Qts2.28 +27%, worse
Vas10.3 L −10%
BL4.0 T·m −15%, worse
Xmax1 mm –
Sensitivity91.8 dB −1.2
JensenP10R-FEN-8
No current priceFs87 Hz −31%, better
Qts1.79 –
Vas28.5 L +150%, worse
BL5.9 T·m +25%, better
Xmax1 mm –
Sensitivity91.8 dB −1.2
JensenMOD8-20-4
No current priceFs111 Hz −12%, better
Qts1.74 −3%
Vas13.1 L +15%, worse
BL3.5 T·m −26%, worse
Xmax1.5 mm +50%, better
Sensitivity90.6 dB −2.4, worse
MonacorSP-202PA
No current priceFs68 Hz −46%, better
Qts1.10 −39%, better
Vas12 L +5%
BL5.6 T·m +19%, better
Xmax3 mm +200%, better
Sensitivity84.3 dB −8.7, worse
Eminence820H
No current priceFs144 Hz +14%, worse
Qts0.88 −51%, better
Vas9.6 L −16%, better
BL5.7 T·m +22%, better
Xmax1.6 mm +59%, better
Sensitivity97 dB +4, better
MonacorSP-8/150PA
No current priceFs88 Hz −30%, better
Qts0.43 −76%, better
Vas12 L +5%
BL12.6 T·m +168%, better
Xmax1.3 mm +25%, better
Sensitivity94.3 dB +1.3
REDCATT81FIND
No current priceFs80 Hz −37%, better
Qts0.50 −72%, better
Vas11.3 L –
BL10.2 T·m +117%, better
Xmax2.3 mm +125%, better
Sensitivity92.4 dB −0.6
Acoustic EleganceTD8M-8
No current priceFs76 Hz −40%, better
Qts0.26 −86%, better
Vas11.3 L –
BL15.5 T·m +230%, better
Xmax3 mm +200%, better
Sensitivity94.6 dB +1.6
MonacorSPM-205/4
No current priceFs37 Hz −71%, better
Qts0.55 −69%, better
Vas72 L +532%, worse
BL4.8 T·m –
Xmax3 mm +200%, better
Sensitivity89.3 dB −3.7, worse
CelestionNTR08-2009D
No current priceFs71 Hz −43%, better
Qts0.21 −88%, better
Vas11.7 L –
BL18.0 T·m +284%, better
Xmax6.5 mm +550%, better
Sensitivity94.6 dB +1.6
LavoceCPF082.00K
No current priceFs93 Hz −26%, better
Qts0.46 −74%, better
Vas11.1 L –
BL10.9 T·m +132%, better
Xmax3.3 mm +230%, better
Sensitivity94.4 dB +1.4
PeerlessNSM-0820R00-04
No current priceFs77 Hz −39%, better
Qts0.18 −90%, better
Vas11 L −4%
BL13.7 T·m +191%, better
Xmax6.6 mm +559%, better
Sensitivity96.3 dB +3.3, better
BMS8N519
No current priceFs75 Hz −41%, better
Qts0.37 −79%, better
Vas10.9 L −4%
BL13.8 T·m +194%, better
Xmax6.3 mm +530%, better
Sensitivity92.5 dB −0.5
REDCATT8NPM
No current priceFs79 Hz −37%, better
Qts0.29 −84%, better
Vas10.9 L −4%
BL14.2 T·m +202%, better
Xmax3.7 mm +270%, better
Sensitivity94.4 dB +1.4
Oberton8NMB250V4
No current priceFs82 Hz −35%, better
Qts0.26 −86%, better
Vas10.9 L −4%
BL14.3 T·m +203%, better
Xmax4.5 mm +350%, better
Sensitivity95.5 dB +2.5, better
JensenP-A-JC8-30FA-8
No current priceFs126 Hz –
Qts1.01 −44%, better
Vas10.8 L −5%
BL6.6 T·m +40%, better
Xmax0.5 mm −50%, worse
Sensitivity94 dB +1
Beyma8CX300FE
No current priceFs89 Hz −29%, better
Qts0.55 −69%, better
Vas10.8 L −5%
BL9.6 T·m +104%, better
Xmax6 mm +500%, better
Sensitivity92.9 dB –
CIARECMI200
No current priceFs80 Hz −37%, better
Qts0.34 −81%, better
Vas12 L +5%
BL9.6 T·m +104%, better
Xmax4.5 mm +350%, better
Sensitivity94.4 dB +1.4
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.