GRS8FR-8
£17.55Fs45 Hz +22%, worse
Qts0.56 –
Vas37.0 L −49%, better
BL8.5 T·m +79%, better
Xmax3 mm –
Sensitivity89.3 dB –
8-inch LF driver · SPM series · 26 mm voice coil · 70 W
Monacor SPM-205/4 4Ω
4 Ω · 3–5000 Hz
No current price
- Fs
- 37Hz
- Xmax
- 3mm
- SPL
- 89dB
- Pe
- 70W
- BL
- 4.8T·m
- Vd
- 63cm³
- Qts
- 0.55
- Vas
- 72L
Monacor SPM-205/4 is an 8-inch 4 ohm LF driver rated at 70 W RMS. The validated T/S data includes Fs 37 Hz, Qts 0.55, Vas 72 L, Xmax 3 mm, sensitivity 89.3 dB, plus 63 cm³ Vd and 54 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
- 37Hz
- Qts
- 0.55
- Qes
- 0.68
- Qms
- 2.7
- Vas
- 72L
- Re
- 3.6Ω
- Le
- 0.65mH
Motor and cone
- BL
- 4.8T·m
- Sd
- 210cm²
- Mms
- 18g
- Xmax
- 3mm
- Vd †
- 63cm³
- Voice coil
- 26mm
Power and response
- Sensitivity †
- 89.3dB
- Manufacturer sensitivity
- 89dB
- Power
- 70W
- Impedance
- 4Ω
- Range
- 3–5000Hz
- EBP †
- 54 · Sealed or vented
Size and mounting
- Diameter
- 200mm
- Cutout
- 183mm
- Depth
- 88mm
- Weight
- 1.1kg
Other published values
- Cms
- 0.98mm/N
- Power Peak
- 150
Other dimensions
- Mounting Depth
- 80
† Calculated by bits from the published values
What this validation status means
Everything else Monacor lists
MF · Primary · 8″
- BL
- 4.8T·m
- Fs
- 37Hz
- Le
- 0.65mH
- Re
- 3.6Ω
- Sd
- 210cm²
- Cms
- 0.98mm/N
- Mms
- 18g
- Qes
- 0.68
- Qms
- 2.7
- Qts
- 0.55
- SPL
- 89.3dB
- Vas
- 72L
- Xmax
- 3mm
- Power
- 70W
- Impedance
- 4Ω
- Power Peak
- 150
- Sensitivity
- 89dB
- Low limit
- 3Hz
- Calculated sensitivity †
- 89.3dB
- High limit
- 5000Hz
- Manufacturer sensitivity
- 89dB
- Voice coil
- 26mm
- Weight
- 1.1kg
- Diameter
- 200mm
- Depth
- 88mm
- Mounting Depth
- 80
- Cutout
- 183mm
02
Compare
Same-size drivers, compared with the SPM-205/4. Clear differences are green when better and red when worse.
This driverSPM-205/4
Best price
–
Fs
37 Hz
Qts
0.55
Vas
72 L
BL
4.8 T·m
Xmax
3 mm
Sensitivity
89.3 dB
Power
70 W
VisatonWS 20 E
£25.92Fs47 Hz +27%, worse
Qts1.14 +107%, worse
Vas39 L −46%, better
BL4.5 T·m −5%
Xmax3 mm –
Sensitivity86.5 dB −2.8, worse
VisatonW 200
£27.60Fs45 Hz +22%, worse
Qts0.63 +15%, worse
Vas54 L −25%, better
BL4.2 T·m −12%, worse
Xmax2 mm −33%, worse
Sensitivity90.1 dB +0.8
Dayton AudioDA175-8
£29.89Fs39 Hz +5%
Qts0.58 +5%
Vas16.3 L −77%, better
BL7.2 T·m +51%, better
Xmax4.3 mm +42%, better
Sensitivity83.4 dB −5.9, worse
PRV Audio8MR450A
£33.58Fs65 Hz +76%, worse
Qts0.55 –
Vas34.9 L −52%, better
BL7.6 T·m +60%, better
Xmax4 mm +33%, better
Sensitivity94.3 dB +5, better
MonacorSP-202E
£41.80Fs51 Hz +38%, worse
Qts0.69 +25%, worse
Vas39 L −46%, better
BL4.9 T·m –
Xmax2.5 mm −17%, worse
Sensitivity90.1 dB +0.8
MonacorSPX-200WP
£41.89Fs36 Hz –
Qts0.59 +7%
Vas60.5 L −16%, better
BL6.8 T·m +43%, better
Xmax2 mm −33%, worse
Sensitivity88.1 dB −1.2
Dayton AudioPA200-8
£44.84Fs55 Hz +49%, worse
Qts0.48 −13%, better
Vas26.6 L −63%, better
BL9.3 T·m +95%, better
Xmax3 mm –
Sensitivity91.5 dB +2.2, better
EminenceALPHA-8A
£54.66Fs73 Hz +97%, worse
Qts0.59 +7%
Vas17.7 L −75%, better
BL7.8 T·m +64%, better
Xmax3.2 mm +7%
Sensitivity92.1 dB +2.8, better
CIAREPM200N
£57.80Fs99 Hz +168%, worse
Qts0.50 −9%
Vas7.7 L −89%, better
BL11.2 T·m +135%, better
Xmax3.5 mm +17%, better
Sensitivity93.1 dB +3.8, better
CIAREPM203
£69.53Fs91 Hz +146%, worse
Qts0.54 –
Vas10 L −86%, better
BL10.1 T·m +112%, better
Xmax4.4 mm +47%, better
Sensitivity92.7 dB +3.4, better
Dayton AudioRS180-4
£69.62Fs38 Hz +4%
Qts0.46 −16%, better
Vas21.2 L −71%, better
BL4.7 T·m –
Xmax6 mm +100%, better
Sensitivity85.1 dB −4.2, worse
CelestionCF0820M
£79.58Fs202 Hz +446%, worse
Qts0.57 +3%
Vas2.1 L −97%, better
BL13.3 T·m +179%, better
Xmax3.5 mm +17%, better
Sensitivity95.3 dB +6, better
B&C8NDL51
£98.85Fs75 Hz +103%, worse
Qts0.57 +4%
Vas10.1 L −86%, better
BL7.3 T·m +54%, better
Xmax7 mm +133%, better
Sensitivity90.3 dB +1
Dayton AudioRSS210HF-4
£144.76Fs30 Hz −20%, better
Qts0.57 +4%
Vas23.7 L −67%, better
BL8.1 T·m +71%, better
Xmax9 mm +200%, better
Sensitivity81.5 dB −7.8, worse
Tang BandW8-2145
£150.75Fs40 Hz +8%
Qts0.45 −18%, better
Vas67.7 L −6%
BL6.6 T·m +39%, better
Xmax3 mm –
Sensitivity90.5 dB +1.2
Scanspeak18M/4631T00
£192.64Fs65 Hz +76%, worse
Qts0.60 +9%
Vas14 L −81%, better
BL5.6 T·m +18%, better
Xmax3 mm –
Sensitivity89.6 dB –
Tang BandW8-1808
£358.55Fs45 Hz +22%, worse
Qts0.44 −20%, better
Vas88.1 L +22%, worse
BL5.3 T·m +11%, better
Xmax5 mm +67%, better
Sensitivity92.9 dB +3.6, better
PRV Audio8MR500-NDY-4
No current priceFs79 Hz +112%, worse
Qts0.54 –
Vas24.3 L −66%, better
BL6.0 T·m +27%, better
Xmax3 mm –
Sensitivity95.2 dB +5.9, better
CIARECW200Z
No current priceFs49 Hz +32%, worse
Qts0.53 −4%
Vas38.3 L −47%, better
BL5.2 T·m +9%
Xmax4 mm +33%, better
Sensitivity90.1 dB +0.8
MonacorSP-200X
No current priceFs50 Hz +35%, worse
Qts0.52 −5%
Vas48 L −33%, better
BL6.1 T·m +28%, better
Xmax1.6 mm −47%, worse
Sensitivity91.4 dB +2.1, better
PRV Audio69MR500-PHP-4
No current priceFs92 Hz +148%, worse
Qts0.65 +18%, worse
Vas15.2 L −79%, better
BL6.8 T·m +43%, better
Xmax2.9 mm −4%
Sensitivity94.4 dB +5.1, better
SB AcousticsSB20PFCS30-7
No current priceFs39 Hz +5%
Qts0.66 +20%, worse
Vas59.5 L −17%, better
BL5.6 T·m +18%, better
Xmax5.5 mm +83%, better
Sensitivity88.6 dB −0.7
Cube AudioF8 NEO V2
No current priceFs39 Hz +5%
Qts0.47 −15%, better
Vas45 L −38%, better
BL9.5 T·m +100%, better
Xmax3 mm –
Sensitivity89.5 dB –
HiViD8.4MKII
No current priceFs36 Hz –
Qts0.56 –
Vas40 L −44%, better
BL7.1 T·m +49%, better
Xmax5 mm +67%, better
Sensitivity86.9 dB −2.4, worse
Tang BandW8-1722B
No current priceFs35 Hz −5%
Qts0.51 −7%
Vas46.3 L −36%, better
BL6.2 T·m +31%, better
Xmax9 mm +200%, better
Sensitivity87.4 dB −1.9
Supravox215 RTF 64 BI-CÔNE
No current priceFs57 Hz +54%, worse
Qts0.46 −16%, better
Vas80 L +11%, worse
BL6.5 T·m +36%, better
Xmax2.3 mm −23%, worse
Sensitivity96.5 dB +7.2, better
Beyma8CX300FE
No current priceFs89 Hz +141%, worse
Qts0.55 –
Vas10.8 L −85%, better
BL9.6 T·m +102%, better
Xmax6 mm +100%, better
Sensitivity92.9 dB +3.6, better
HiViD8.8MKII
No current priceFs39 Hz +5%
Qts0.57 +4%
Vas38.1 L −47%, better
BL9.6 T·m +102%, better
Xmax5 mm +67%, better
Sensitivity87.7 dB −1.6
CelestionTF0815RE
No current priceFs65 Hz +75%, worse
Qts0.53 −3%
Vas22.1 L −69%, better
BL8.9 T·m +87%, better
Xmax5.3 mm +75%, better
Sensitivity91.7 dB +2.4, better
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.