GRS10SMP-4
£38.89Fs28 Hz +7%
Qts0.51 +19%, worse
Vas86 L −20%, better
BL8.2 T·m +5%
Xmax5 mm −17%, worse
Sensitivity86.8 dB −1.1
10-inch LF driver · 80 W
Dayton Audio SD270A-88 4Ω
4 Ω · 26–2000 Hz
No price for delivery to the UK
- Fs
- 26Hz
- Xmax
- 6mm
- SPL
- 88dB
- Pe
- 80W
- BL
- 7.8T·m
- Vd
- 208cm³
- Qts
- 0.43
- Vas
- 108L
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 are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
on-axis
Frequency response
240 plotted pointsMedium confidence1,543 selected pixels of 1,543 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence1,282 selected pixels of 1,282
Dayton Audio SD270A-88 is a 10-inch 4 ohm LF driver rated at 80 W RMS. The validated T/S data includes Fs 26 Hz, Qts 0.43, Vas 107.5 L, Xmax 6 mm, sensitivity 87.9 dB, plus 208 cm³ Vd and 52 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
- 26Hz
- Qts
- 0.43
- Qes
- 0.50
- Qms
- 3.2
- Vas
- 107.5L
- Re
- 3.2Ω
- Le
- 1.12mH
Motor and cone
- BL
- 7.8T·m
- Sd
- 346cm²
- Mms
- 58g
- Xmax
- 6mm
- Vd †
- 208cm³
Power and response
- Sensitivity †
- 87.9dB
- Manufacturer sensitivity
- 87.8dB
- Power
- 80W
- Impedance
- 4Ω
- Range
- 26–2000Hz
- EBP †
- 52 · Sealed or vented
Size and mounting
- Diameter
- 270mm
- Cutout
- 227mm
- Depth
- 109mm
Other published values
- Cms
- 0.64mm/N
- Power Peak
- 160
† Calculated by bits from the published values
What this validation status means
Everything else Dayton Audio lists
LF · Primary · 10″
- BL
- 7.8T·m
- Fs
- 26Hz
- Le
- 1.12mH
- Re
- 3.2Ω
- Sd
- 346cm²
- Cms
- 0.64mm/N
- Mms
- 58g
- Qes
- 0.50
- Qms
- 3.2
- Qts
- 0.43
- SPL
- 87.9dB
- Vas
- 107.5L
- Xmax
- 6mm
- Power
- 80W
- Impedance
- 4Ω
- Power Peak
- 160
- Sensitivity
- 87.8dB
- Low limit
- 26Hz
- Calculated sensitivity †
- 87.9dB
- High limit
- 2000Hz
- Manufacturer sensitivity
- 87.8dB
- Diameter
- 270mm
- Depth
- 109mm
- Cutout
- 227mm
02
Compare
Same-size drivers, compared with the SD270A-88. Clear differences are green when better and red when worse.
This driverSD270A-88
Best price
–
Fs
26 Hz
Qts
0.43
Vas
107.5 L
BL
7.8 T·m
Xmax
6 mm
Sensitivity
87.9 dB
Power
80 W
FaitalPRO10FE200
£40.91Fs55 Hz +110%, worse
Qts0.49 +14%, worse
Vas61 L −43%, better
BL7 T·m −10%, worse
Xmax4.6 mm −23%, worse
Sensitivity94.9 dB +7, better
Beyma10CMV2
£52.32Fs52 Hz +98%, worse
Qts0.42 –
Vas44 L −59%, better
BL13.4 T·m +72%, better
Xmax6.5 mm +8%
Sensitivity93.2 dB +5.3, better
SB AcousticsSB26SFCL38-4
£57.69Fs27 Hz +5%
Qts0.43 –
Vas104 L −3%
BL8.2 T·m +5%
Xmax7.9 mm +32%, better
Sensitivity88.6 dB +0.7
FaitalPRO10FE400
£64.43Fs60 Hz +129%, worse
Qts0.41 −5%
Vas33.6 L −69%, better
BL10.2 T·m +31%, better
Xmax5.6 mm −6%
Sensitivity94.2 dB +6.3, better
CIAREHW250
£64.47Fs23 Hz −12%, better
Qts0.48 +12%, worse
Vas275 L +156%, worse
BL6.5 T·m −16%, worse
Xmax6.5 mm +8%
Sensitivity89.6 dB +1.7
Dayton AudioDS270-8
£71.05Fs32 Hz +21%, worse
Qts0.44 –
Vas87.7 L −18%, better
BL10.1 T·m +29%, better
Xmax5.5 mm −8%
Sensitivity89.1 dB +1.2
VisatonW 250 S
£72.18Fs33 Hz +26%, worse
Qts0.35 −19%, better
Vas135 L +26%, worse
BL8.9 T·m +14%, better
Xmax5 mm −17%, worse
Sensitivity92.6 dB +4.7, better
Beyma10BR60
£86.23Fs29 Hz +11%, worse
Qts0.39 −9%
Vas142 L +32%, worse
BL10.9 T·m +40%, better
Xmax6.5 mm +8%
Sensitivity91 dB +3.1, better
Dayton AudioDSA270-8
£89.75Fs30 Hz +13%, worse
Qts0.39 −9%
Vas88.1 L −18%, better
BL11.2 T·m +44%, better
Xmax5.5 mm −8%
Sensitivity88.9 dB +1
EminenceLEGEND BP102
£91.00Fs35 Hz +34%, worse
Qts0.43 –
Vas91.2 L −15%, better
BL10 T·m +28%, better
Xmax6.2 mm +3%
Sensitivity91.2 dB +3.3, better
EminenceLEGEND BP 102-4
£105.00Fs35 Hz +34%, worse
Qts0.38 −12%, better
Vas103.8 L −3%
BL7.1 T·m −9%
Xmax6.2 mm +3%
Sensitivity92.5 dB +4.6, better
Dayton AudioRS270-8
£112.19Fs30 Hz +13%, worse
Qts0.47 +9%
Vas96.5 L −10%, better
BL10.3 T·m +32%, better
Xmax6.6 mm +10%
Sensitivity88.2 dB –
Scanspeak26W/8534G00
£132.30Fs23 Hz −12%, better
Qts0.40 −7%
Vas150 L +40%, worse
BL10.1 T·m +29%, better
Xmax6 mm –
Sensitivity88.4 dB +0.5
Scanspeak26W/4534G00
£132.30Fs23 Hz −12%, better
Qts0.36 −16%, better
Vas156 L +45%, worse
BL8.8 T·m +13%, better
Xmax6 mm –
Sensitivity89.1 dB +1.2
LavoceCSF102.50K
£141.89Fs65 Hz +148%, worse
Qts0.45 +5%
Vas29.9 L −72%, better
BL12.9 T·m +65%, better
Xmax6.3 mm +4%
Sensitivity94.4 dB +6.5, better
SB AcousticsWO24P-4
£195.93Fs28 Hz +7%
Qts0.40 −7%
Vas71 L −34%, better
BL7.6 T·m –
Xmax8.5 mm +42%, better
Sensitivity87.7 dB –
Scanspeak25W/8565-00
£221.85Fs20 Hz −24%, better
Qts0.41 −5%
Vas225 L +109%, worse
BL8.2 T·m +5%
Xmax6.5 mm +8%
Sensitivity88.1 dB –
B&C10FCX64
£237.42Fs63 Hz +140%, worse
Qts0.42 –
Vas25 L −77%, better
BL13.4 T·m +72%, better
Xmax6 mm –
Sensitivity93.6 dB +5.7, better
WavecorSW280WA04
£241.98Fs34 Hz +30%, worse
Qts0.45 +5%
Vas30.5 L −72%, better
BL15.5 T·m +99%, better
Xmax6 mm –
Sensitivity86.1 dB −1.8
WavecorSW280WA03
£241.98Fs35 Hz +32%, worse
Qts0.46 +7%
Vas29.7 L −72%, better
BL12.5 T·m +60%, better
Xmax6 mm –
Sensitivity86.1 dB −1.8
WavecorSW280WA01
£408.94Fs27 Hz –
Qts0.41 −5%
Vas41.4 L −61%, better
BL13.4 T·m +72%, better
Xmax6 mm –
Sensitivity84.5 dB −3.4, worse
MonacorSP-252C
No current priceFs35 Hz +34%, worse
Qts0.41 −5%
Vas96 L −11%, better
BL8.1 T·m +4%
Xmax5 mm −17%, worse
Sensitivity91.5 dB +3.6, better
KartesianSUB265_VKI-S
No current priceFs22 Hz −16%, better
Qts0.46 +7%
Vas103.4 L −4%
BL9.1 T·m +16%, better
Xmax16 mm +167%, better
Sensitivity85.5 dB −2.4, worse
CIARECME250
No current priceFs48 Hz +83%, worse
Qts0.48 +12%, worse
Vas74 L −31%, better
BL7.5 T·m −4%
Xmax4.5 mm −25%, worse
Sensitivity93.9 dB +6, better
Sica10 H 2 CS
No current priceFs30 Hz +16%, worse
Qts0.37 −14%, better
Vas84.3 L −22%, better
BL12.4 T·m +59%, better
Xmax6 mm –
Sensitivity89.6 dB +1.7
HiViD10G
No current priceFs26 Hz –
Qts0.46 +7%
Vas117.3 L +9%
BL13.2 T·m +69%, better
Xmax8.3 mm +38%, better
Sensitivity88.2 dB –
Dayton AudioRS270P-8A
No current priceFs23 Hz −13%, better
Qts0.32 −26%, better
Vas110.5 L –
BL13 T·m +67%, better
Xmax6 mm –
Sensitivity87 dB −0.9
PeerlessFSL-1025R03-06
No current priceFs66 Hz +152%, worse
Qts0.46 +7%
Vas18.1 L −83%, better
BL14.3 T·m +83%, better
Xmax6.3 mm +4%
Sensitivity92.1 dB +4.2, better
WavecorSW280WA02
No current priceFs27 Hz –
Qts0.48 +12%, worse
Vas41.4 L −61%, better
BL16.6 T·m +113%, better
Xmax6 mm –
Sensitivity83.9 dB −4, 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 56 ratings · Checked 25 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 |
|---|---|---|---|---|
Audiophonics Import VAT and duty may apply | £71.09 | Available on order | Visit shop at Audiophonics | |
SoundImports Import VAT and duty may apply | £75.32 | Back order | Visit shop at SoundImports |