GRS8PF-8
£16.29 · 37% less, betterFs50 Hz −44%, better
Qts0.98 –
Vas28.9 L +94%, worse
BL6.5 T·m +67%, better
Xmax3 mm +200%, better
Sensitivity86.7 dB −3.7, worse
8-inch LF driver · SPM series · 25 mm voice coil · 30 W
Monacor SPM-200X/4 4Ω
4 Ω · 3–15000 Hz
£25.97
18%LTT · Ships from Germany · All 4 offers
- Fs
- 89Hz
- Xmax
- 1mm
- SPL
- 90dB
- Pe
- 30W
- BL
- 3.9T·m
- Vd
- 20cm³
- Qts
- 0.97
- Vas
- 15L
Monacor SPM-200X/4 is an 8-inch 4 ohm LF driver rated at 30 W RMS. The validated T/S data includes Fs 89 Hz, Qts 0.97, Vas 14.9 L, Xmax 1 mm, sensitivity 90.4 dB, plus 20 cm³ Vd and 59 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 £25.97.
The published T/S values agree with each other
Thiele/Small
- Fs
- 89Hz
- Qts
- 0.97
- Qes
- 1.52
- Qms
- 2.7
- Vas
- 14.9L
- Re
- 3.7Ω
- Le
- 0.20mH
Motor and cone
- BL
- 3.9T·m
- Sd
- 201cm²
- Mms
- 10g
- Xmax
- 1mm
- Vd †
- 20cm³
- Voice coil
- 25mm
Power and response
- Sensitivity †
- 90.4dB
- Manufacturer sensitivity
- 94dB
- Power
- 30W
- Impedance
- 4Ω
- Range
- 3–15000Hz
- EBP †
- 59 · Sealed or vented
Size and mounting
- Diameter
- 205mm
- Cutout
- 184mm
- Depth
- 82mm
- Weight
- 0.7kg
Other published values
- Cms
- 0.27mm/N
- Power Peak
- 60
Other dimensions
- Mounting Depth
- 76
Sensitivity shows 90.4 dB, calculated from the T/S values. Monacor publishes 94.0 dB, 3.6 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Monacor lists
LF · Primary · 8″
- BL
- 3.9T·m
- Fs
- 89Hz
- Le
- 0.20mH
- Re
- 3.7Ω
- Sd
- 201cm²
- Cms
- 0.27mm/N
- Mms
- 10g
- Qes
- 1.52
- Qms
- 2.7
- Qts
- 0.97
- SPL
- 90.4dB
- Vas
- 14.9L
- Xmax
- 1mm
- Power
- 30W
- Impedance
- 4Ω
- Power Peak
- 60
- Sensitivity
- 94dB
- Low limit
- 3Hz
- Calculated sensitivity †
- 90.4dB
- High limit
- 15000Hz
- Manufacturer sensitivity
- 94dB
- Voice coil
- 25mm
- Weight
- 0.7kg
- Diameter
- 205mm
- Depth
- 82mm
- Mounting Depth
- 76
- Cutout
- 184mm
02
Compare
Same-size drivers, compared with the SPM-200X/4. Clear differences are green when better and red when worse.
This driverSPM-200X/4
Best price
£25.97
Fs
89 Hz
Qts
0.97
Vas
14.9 L
BL
3.9 T·m
Xmax
1 mm
Sensitivity
90.4 dB
Power
30 W
VisatonWS 20 E
£25.92 · Same priceFs47 Hz −47%, better
Qts1.14 +18%, worse
Vas39 L +162%, worse
BL4.5 T·m +15%, better
Xmax6 mm +500%, better
Sensitivity86.5 dB −3.9, worse
PRV Audio8FR250
£52.74 · 103% more, worseFs76 Hz −15%, better
Qts1.02 +5%
Vas21.2 L +42%, worse
BL6.5 T·m +67%, better
Xmax3.5 mm +250%, better
Sensitivity91.2 dB +0.8
Beyma8WRS300
£75.45 · 191% more, worseFs65 Hz −27%, better
Qts0.28 −71%, better
Vas15 L –
BL15.2 T·m +290%, better
Xmax6 mm +500%, better
Sensitivity93.4 dB +3, better
Beyma8WR300
£90.10 · 247% more, worseFs65 Hz −27%, better
Qts0.27 −72%, better
Vas15 L –
BL15.5 T·m +297%, better
Xmax6 mm +500%, better
Sensitivity93.6 dB +3.2, better
Sica8 C 2 CP
£92.07 · 255% more, worseFs79 Hz −12%, better
Qts0.30 −69%, better
Vas14.7 L –
BL13.5 T·m +246%, better
Xmax3.5 mm +250%, better
Sensitivity95.5 dB +5.1, better
B&C8FG64
£105.55 · 306% more, worseFs51 Hz −43%, better
Qts0.31 −68%, better
Vas15 L –
BL15.8 T·m +305%, better
Xmax7 mm +600%, better
Sensitivity90 dB –
LavoceCSF082.00K
£141.30 · 444% more, worseFs81 Hz −9%
Qts0.40 −59%, better
Vas14.8 L –
BL11.0 T·m +182%, better
Xmax5 mm +400%, better
Sensitivity94.5 dB +4.1, better
B&C8CX21
£151.61 · 484% more, worseFs74 Hz −17%, better
Qts0.36 −63%, better
Vas15 L –
BL11.5 T·m +195%, better
Xmax5.5 mm +450%, better
Sensitivity94 dB +3.6, better
VisatonB 200
£158.31 · 510% more, worseFs40 Hz −55%, better
Qts0.75 −23%, better
Vas102 L +585%, worse
BL3.9 T·m –
Xmax3.5 mm +250%, better
Sensitivity91 dB +0.6
FaitalPRO8HX230
£233.73 · 800% more, worseFs70 Hz −21%, better
Qts0.29 −70%, better
Vas14.7 L –
BL15 T·m +285%, better
Xmax6.2 mm +517%, better
Sensitivity94.1 dB +3.7, better
JensenP8R-8
No current priceFs135 Hz +52%, worse
Qts2.28 +135%, worse
Vas10.3 L −31%, better
BL4.0 T·m –
Xmax1 mm –
Sensitivity91.8 dB +1.4
JensenC8R-4
No current priceFs131 Hz +47%, worse
Qts1.42 +46%, worse
Vas10.3 L −31%, better
BL3.8 T·m −4%
Xmax1 mm –
Sensitivity92.3 dB +1.9
JensenMOD8-20-8
No current priceFs119 Hz +34%, worse
Qts2.24 +131%, worse
Vas11.1 L −26%, better
BL4.5 T·m +14%, better
Xmax1 mm –
Sensitivity93.2 dB +2.8, better
JensenP-A-JC8-30FA-8
No current priceFs126 Hz +42%, worse
Qts1.01 +4%
Vas10.8 L −28%, better
BL6.6 T·m +68%, better
Xmax0.5 mm −50%, worse
Sensitivity94 dB +3.6, better
JensenC8R-8
No current priceFs126 Hz +42%, worse
Qts1.80 +86%, worse
Vas11.4 L −23%, better
BL4.7 T·m +21%, better
Xmax1 mm –
Sensitivity93 dB +2.6, better
CIARECXE184
No current priceFs113 Hz +27%, worse
Qts1.08 +11%, worse
Vas3.4 L −77%, better
BL3.3 T·m −15%, worse
Xmax2.1 mm +110%, better
Sensitivity87.5 dB −2.9, worse
PRV Audio8MB450
No current priceFs75 Hz −16%, better
Qts1.05 +8%
Vas18.2 L +22%, worse
BL7.4 T·m +89%, better
Xmax4.5 mm +350%, better
Sensitivity90.5 dB –
JensenMOD8-20-4
No current priceFs111 Hz +25%, worse
Qts1.74 +79%, worse
Vas13.1 L −12%, better
BL3.5 T·m −11%, worse
Xmax1.5 mm +50%, better
Sensitivity90.6 dB –
PRV Audio8MB450-4
No current priceFs77 Hz −14%, better
Qts0.88 −9%
Vas17.0 L +14%, worse
BL6.2 T·m +59%, better
Xmax4.5 mm +350%, better
Sensitivity91.2 dB +0.8
JensenP10R-FEN-8
No current priceFs87 Hz –
Qts1.79 +85%, worse
Vas28.5 L +91%, worse
BL5.9 T·m +51%, better
Xmax1 mm –
Sensitivity91.8 dB +1.4
PRV AudioD4
No current priceFs45 Hz −49%, better
Qts0.92 −5%
Vas8.4 L −43%, better
BL6.8 T·m +74%, better
Xmax14 mm +1300%, better
Sensitivity80.9 dB −9.5, worse
MonacorSP-202PA
No current priceFs68 Hz −24%, better
Qts1.10 +13%, worse
Vas12 L −19%, better
BL5.6 T·m +44%, better
Xmax3 mm +200%, better
Sensitivity84.3 dB −6.1, worse
Eminence820H
No current priceFs144 Hz +62%, worse
Qts0.88 −9%
Vas9.6 L −35%, better
BL5.7 T·m +47%, better
Xmax1.6 mm +59%, better
Sensitivity97 dB +6.6, better
JensenBS8N250A-8
No current priceFs59 Hz −34%, better
Qts0.37 −62%, better
Vas14.9 L –
BL12.8 T·m +229%, better
Xmax5 mm +400%, better
Sensitivity91 dB +0.6
Oberton8NCX
No current priceFs77 Hz −13%, better
Qts0.40 −59%, better
Vas14.9 L –
BL10.1 T·m +159%, better
Xmax5.3 mm +425%, better
Sensitivity94 dB +3.6, better
Oberton8MB201
No current priceFs68 Hz −24%, better
Qts0.31 −68%, better
Vas14.7 L –
BL12.5 T·m +222%, better
Xmax7 mm +600%, better
Sensitivity93.4 dB +3, better
LavoceCAF082.00K
No current priceFs72 Hz −19%, better
Qts0.34 −65%, better
Vas15.1 L –
BL11.7 T·m +199%, better
Xmax6.7 mm +570%, better
Sensitivity93.7 dB +3.3, better
LavoceCAN082.00K
No current priceFs72 Hz −19%, better
Qts0.27 −72%, better
Vas15.1 L –
BL13.2 T·m +237%, better
Xmax6.7 mm +570%, better
Sensitivity94.8 dB +4.4, better
Tang BandW8-740M
No current priceFs30 Hz −66%, better
Qts0.34 −65%, better
Vas14.7 L –
BL14.3 T·m +267%, better
Xmax12 mm +1100%, better
Sensitivity82.3 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
- SoundImports5.0 out of 54 ratings · Checked 23 Oct 2026Read reviews on SoundImports
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
LTT Import VAT and duty may apply | £25.97, the lowest price | Stock not listed | Visit shop at LTT | |
SoundImports Import VAT and duty may apply | £31.79 | 22% above the lowest price | 3 in stock | Visit shop at SoundImports |
Audiophonics Import VAT and duty may apply | £33.68 | 30% above the lowest price | Available on order | Visit shop at Audiophonics |
Best price over time
Tracked since 1 Apr