SB AcousticsSB20PFCR30-4
£31.27 · 64% less, betterFs34 Hz +8%
Qts0.33 –
Vas66.2 L −4%
BL6.6 T·m −22%, worse
Xmax5.8 mm −18%, worse
Sensitivity90.5 dB +1.7
8-inch LF driver · 80 W
Dayton Audio RS225P-8A 8Ω
8 Ω · 30–7000 Hz
£87.88
0.1%SoundImports · 43 in stock · Ships from Netherlands · All 4 offers
- Fs
- 32Hz
- Xmax
- 7mm
- SPL
- 89dB
- Pe
- 80W
- BL
- 8.5T·m
- Vd
- 150cm³
- Qts
- 0.34
- Vas
- 69L
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 1 trace
These plotted lines are Bits digitizations of manufacturer evidence, not new measurements. How provenance works
- Trace datasheet-response-trace-poc/v1
45 degrees
Frequency response
240 plotted pointsMedium confidence4,085 selected pixels of 6,972
Dayton Audio RS225P-8A is an 8-inch 8 ohm LF driver rated at 80 W RMS. The validated T/S data includes Fs 32 Hz, Qts 0.34, Vas 68.8 L, Xmax 7 mm, sensitivity 88.8 dB, plus 150 cm³ Vd and 69 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 £87.88.
The published T/S values agree with each other
Thiele/Small
- Fs
- 32Hz
- Qts
- 0.34
- Qes
- 0.46
- Qms
- 1.3
- Vas
- 68.8L
- Re
- 7.1Ω
- Le
- 1.02mH
Motor and cone
- BL
- 8.5T·m
- Sd
- 214cm²
- Mms
- 24g
- Xmax
- 7mm
- Vd †
- 150cm³
Power and response
- Sensitivity †
- 88.8dB
- Manufacturer sensitivity
- 89.1dB
- Power
- 80W
- Impedance
- 8Ω
- Range
- 30–7000Hz
- EBP †
- 69 · Sealed or vented
Size and mounting
- Diameter
- 223mm
- Cutout
- 184mm
- Depth
- 89mm
- Weight
- 2.7kg
Other published values
- Cms
- 1.07mm/N
- Power Peak
- 120
† Calculated by bits from the published values
What this validation status means
Everything else Dayton Audio lists
LF · Primary · 8″
- BL
- 8.5T·m
- Fs
- 32Hz
- Le
- 1.02mH
- Re
- 7.1Ω
- Sd
- 214cm²
- Cms
- 1.07mm/N
- Mms
- 24g
- Qes
- 0.46
- Qms
- 1.3
- Qts
- 0.34
- SPL
- 88.8dB
- Vas
- 68.8L
- Xmax
- 7mm
- Power
- 80W
- Impedance
- 8Ω
- Power Peak
- 120
- Sensitivity
- 89.1dB
- Low limit
- 30Hz
- Calculated sensitivity †
- 88.8dB
- High limit
- 7000Hz
- Manufacturer sensitivity
- 89.1dB
- Weight
- 2.7kg
- Diameter
- 223mm
- Depth
- 89mm
- Cutout
- 184mm
02
Compare
Same-size drivers, compared with the RS225P-8A. Clear differences are green when better and red when worse.
This driverRS225P-8A
Best price
£87.88
Fs
32 Hz
Qts
0.34
Vas
68.8 L
BL
8.5 T·m
Xmax
7 mm
Sensitivity
88.8 dB
Power
80 W
SB AcousticsSB20PFCR30-8
£33.07 · 62% less, betterFs34 Hz +8%
Qts0.37 +9%
Vas66.2 L −4%
BL7.7 T·m −9%
Xmax5.8 mm −18%, worse
Sensitivity89.8 dB +1
SB AcousticsSB20PFC30-8
£35.17 · 60% less, betterFs34 Hz +8%
Qts0.37 +9%
Vas66.2 L −4%
BL7.7 T·m −9%
Xmax5.7 mm −19%, worse
Sensitivity89.8 dB +1
SB AcousticsSB20PFC30-4
£35.17 · 60% less, betterFs34 Hz +7%
Qts0.33 –
Vas66.2 L −4%
BL6.6 T·m −22%, worse
Xmax5.8 mm −18%, worse
Sensitivity90.4 dB +1.6
PeerlessHDS-P830869
£46.01 · 48% less, betterFs34 Hz +8%
Qts0.38 +12%, worse
Vas57.6 L −16%, better
BL9.3 T·m +10%
Xmax7.5 mm +7%
Sensitivity89.5 dB +0.7
VisatonW 200 S
£50.23 · 43% less, betterFs30 Hz −5%
Qts0.33 –
Vas70 L –
BL9 T·m +6%
Xmax3.5 mm −50%, worse
Sensitivity89.2 dB –
Beyma8BR40
£53.89 · 39% less, betterFs30 Hz −5%
Qts0.39 +15%, worse
Vas89.1 L +30%, worse
BL6.8 T·m −20%, worse
Xmax6.7 mm −4%
Sensitivity89 dB –
HiViC8
£61.33 · 30% less, betterFs35 Hz +11%, worse
Qts0.36 +6%
Vas56.1 L −18%, better
BL9.8 T·m +15%, better
Xmax5.9 mm −16%, worse
Sensitivity89.6 dB +0.8
CIAREHWB200
£63.09 · 28% less, betterFs32 Hz –
Qts0.39 +15%, worse
Vas59 L −14%, better
BL8.9 T·m +5%
Xmax7 mm –
Sensitivity88.8 dB –
Dayton AudioRS225-8
£67.31 · 23% less, betterFs28 Hz −10%, better
Qts0.38 +12%, worse
Vas56.8 L −17%, better
BL9.1 T·m +6%
Xmax7 mm –
Sensitivity86.1 dB −2.7, worse
SB AcousticsSB23NACS45-8
£88.56 · Same priceFs25 Hz −21%, better
Qts0.37 +9%
Vas94 L +37%, worse
BL7.9 T·m −7%
Xmax6.5 mm −7%
Sensitivity87.7 dB −1.1
SB AcousticsSB23CACS45-8
£114.02 · 30% more, worseFs25 Hz −21%, better
Qts0.40 +18%, worse
Vas87 L +26%, worse
BL7.9 T·m −7%
Xmax6.5 mm −7%
Sensitivity86.9 dB −1.9
VisatonGF 200
£132.67 · 51% more, worseFs30 Hz −5%
Qts0.34 –
Vas68 L –
BL9.2 T·m +8%
Xmax6 mm −14%, worse
Sensitivity89 dB –
VisatonAL 200
£150.67 · 71% more, worseFs32 Hz –
Qts0.35 –
Vas77 L +12%, worse
BL8.8 T·m +4%
Xmax7 mm –
Sensitivity90.1 dB +1.3
MarkaudioMA200-M MULTI
£156.00 · 78% more, worseFs33 Hz +4%
Qts0.35 –
Vas65.2 L −5%
BL8.5 T·m –
Xmax9 mm +29%, better
Sensitivity89.6 dB +0.8
Scanspeak18W/8531G00
£168.81 · 92% more, worseFs28 Hz −11%, better
Qts0.36 +6%
Vas58.2 L −15%, better
BL6.8 T·m −20%, worse
Xmax6.5 mm −7%
Sensitivity87.2 dB −1.6
SEASH1471-08 CA22RNY
£171.54 · 95% more, worseFs34 Hz +8%
Qts0.30 −12%, better
Vas82 L +19%, worse
BL8.5 T·m –
Xmax6 mm −14%, worse
Sensitivity91.5 dB +2.7, better
SB AcousticsMW19TX-8
£283.85 · 223% more, worseFs33 Hz +4%
Qts0.33 –
Vas53.4 L −22%, better
BL7.5 T·m −12%, worse
Xmax6.7 mm −4%
Sensitivity89.4 dB +0.6
SB AcousticsWO24TX-4
£292.97 · 233% more, worseFs26 Hz −17%, better
Qts0.35 –
Vas79 L +15%, worse
BL7.9 T·m −7%
Xmax8.8 mm +25%, better
Sensitivity87.9 dB −0.9
£309.76 · 253% more, worse
Fs33 Hz +4%
Qts0.30 −12%, better
Vas72 L +5%
BL8.8 T·m +4%
Xmax7 mm –
Sensitivity90.6 dB +1.8
£527.46 · 500% more, worse
Fs25 Hz −21%, better
Qts0.39 +15%, worse
Vas93 L +35%, worse
BL8.3 T·m –
Xmax7 mm –
Sensitivity87.2 dB −1.6
PurifiPTT8.0X04-NAB-01
£586.08 · 567% more, worseFs26 Hz −18%, better
Qts0.36 +6%
Vas70.4 L –
BL8 T·m −6%
Xmax9.3 mm +33%, better
Sensitivity87.2 dB −1.6
MarkaudioMA200-P MICA
No current priceFs39 Hz +23%, worse
Qts0.37 +10%
Vas66.5 L −3%
BL7.0 T·m −17%, worse
Xmax7 mm –
Sensitivity91.5 dB +2.7, better
SB AcousticsMW19PF-8
No current priceFs30 Hz −5%
Qts0.34 –
Vas63 L −8%
BL7 T·m −18%, worse
Xmax6.5 mm −7%
Sensitivity88.7 dB –
RS SpeakersW 220.50 FIBONACCI
No current priceFs33 Hz +6%
Qts0.36 +6%
Vas55.6 L −19%, better
BL8.6 T·m –
Xmax6 mm −14%, worse
Sensitivity89.3 dB +0.5
HiViSS8II
No current priceFs32 Hz –
Qts0.32 −6%
Vas61.6 L −10%, better
BL8.5 T·m –
Xmax5.8 mm −17%, worse
Sensitivity89.8 dB +1
WavecorWF223BD02
No current priceFs31 Hz –
Qts0.37 +9%
Vas49.5 L −28%, better
BL9.5 T·m +12%, better
Xmax6.5 mm −7%
Sensitivity87.9 dB −0.9
Audio Technology8 A 77 20 06 SD
No current priceFs30 Hz −5%
Qts0.30 −12%, better
Vas67 L –
BL9.3 T·m +9%
Xmax8 mm +14%, better
Sensitivity89.2 dB –
Tang BandW8-2096B
No current priceFs32 Hz –
Qts0.32 −6%
Vas57.9 L −16%, better
BL8.0 T·m −6%
Xmax8.5 mm +21%, better
Sensitivity89.1 dB –
HiViSS8
No current priceFs30 Hz −5%
Qts0.33 –
Vas83.3 L +21%, worse
BL6.8 T·m −20%, worse
Xmax6 mm −14%, worse
Sensitivity89.6 dB +0.8
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Parts Express4.9 out of 534 ratings · Checked 26 Oct 2026Read reviews on Parts Express
- SoundImports5.0 out of 55 ratings · Checked 26 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 |
|---|---|---|---|---|
SoundImports Import VAT and duty may apply | £87.88, the lowest price | 43 in stock | Visit shop at SoundImports | |
Parts Express Import VAT and duty may apply | £67.31 | Back order | Visit shop at Parts Express | |
Audiophonics Import VAT and duty may apply | £87.78 | Available on order | Visit shop at Audiophonics |
Best price over time
Tracked since 1 Apr