REDCATT4FR-1
£12.10 · 7% less, betterFs79 Hz –
Qts0.52 –
Vas1.8 L −9%
BL4.8 T·m –
Xmax2.8 mm −45%, worse
Sensitivity83.7 dB −0.7
4-inch LF driver · SDS series · 25 W
Peerless SDS-100F25CP09-04 4Ω
4 Ω
£13.05
SteadyParts Express · 162 in stock · Ships from United States · All 1 offer
- Fs
- 80Hz
- Xmax
- 5.0mm
- SPL
- 84dB
- Pe
- 25W
- BL
- 4.7T·m
- Vd
- 25cm³
- Qts
- 0.53
- Vas
- 2L
Peerless SDS-100F25CP09-04 is a 4-inch 4 ohm LF driver rated at 25 W RMS. The validated T/S data includes Fs 80 Hz, Qts 0.53, Vas 2.0 L, Xmax 5.0 mm, sensitivity 84.4 dB, plus 25 cm³ Vd and 137 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 £13.05.
The published T/S values agree with each other
Thiele/Small
- Fs
- 80Hz
- Qts
- 0.53
- Qes
- 0.58
- Qms
- 5.3
- Vas
- 2.0L
- Re
- 3.6Ω
- Le
- 0.42mH
Motor and cone
- BL
- 4.7T·m
- Sd
- 50cm²
- Mms
- 7g
- Xmax
- 5.0mm
- Vd †
- 25cm³
Power and response
- Sensitivity †
- 84.4dB
- Manufacturer sensitivity
- 83.8dB
- Power
- 25W
- Impedance
- 4Ω
- EBP †
- 137 · Leans vented
Size and mounting
- Weight
- 0.7kg
Other published values
- Cms
- 0.55mm/N
† Calculated by bits from the published values
What this validation status means
Everything else Peerless lists
LF · Primary · 4.015748031496063″
- BL
- 4.7T·m
- Fs
- 80Hz
- Le
- 0.42mH
- Re
- 3.6Ω
- Sd
- 50cm²
- Cms
- 0.55mm/N
- Mms
- 7g
- Qes
- 0.58
- Qms
- 5.3
- Qts
- 0.53
- SPL
- 84.4dB
- Vas
- 2.0L
- Xmax
- 5.0mm
- Power
- 25W
- Impedance
- 4Ω
- Sensitivity
- 83.8dB
- Calculated sensitivity †
- 84.4dB
- Manufacturer sensitivity
- 83.8dB
- Weight
- 0.7kg
02
Compare
Same-size drivers, compared with the SDS-100F25CP09-04. Clear differences are green when better and red when worse.
This driverSDS-100F25CP09-04
Best price
£13.05
Fs
80 Hz
Qts
0.53
Vas
2.0 L
BL
4.7 T·m
Xmax
5.0 mm
Sensitivity
84.4 dB
Power
25 W
VisatonFR 10
£13.65 · 5% moreFs90 Hz +13%, worse
Qts0.54 –
Vas2.3 L +17%, worse
BL4.6 T·m –
Xmax4 mm −21%, worse
Sensitivity85.8 dB +1.4
PeerlessSDS-P830855
£14.18 · 9% more, worseFs66 Hz −18%, better
Qts0.48 −9%
Vas3.3 L +65%, worse
BL5.2 T·m +11%, better
Xmax5.0 mm –
Sensitivity84.4 dB –
REDCATT4FR-2
£16.82 · 29% more, worseFs80 Hz –
Qts0.51 −4%
Vas2.0 L –
BL4.6 T·m –
Xmax0.35 mm −93%, worse
Sensitivity84.4 dB –
Sica3.5 F 1 CS
£16.87 · 29% more, worseFs107 Hz +34%, worse
Qts0.57 +8%
Vas1.4 L −29%, better
BL4.2 T·m −11%, worse
Xmax1.5 mm −70%, worse
Sensitivity86.4 dB +2, better
Sica3.5 H 1 CS
£18.65 · 43% more, worseFs85 Hz +6%
Qts0.53 –
Vas1.8 L −9%
BL4.8 T·m –
Xmax2.5 mm −50%, worse
Sensitivity84.9 dB +0.5
Dayton AudioND91-8
£21.16 · 62% more, worseFs71 Hz −12%, better
Qts0.47 −11%, better
Vas1.5 L −22%, better
BL5.6 T·m +19%, better
Xmax5.1 mm –
Sensitivity82.1 dB −2.3, worse
Dayton AudioND91-4
£21.16 · 62% more, worseFs74 Hz −8%
Qts0.41 −23%, better
Vas1.4 L −29%, better
BL4.6 T·m –
Xmax4.6 mm −9%
Sensitivity83 dB −1.4
PeerlessGBS-115N25AL01-04
£21.56 · 65% more, worseFs90 Hz +13%, worse
Qts0.63 +19%, worse
Vas1.8 L −9%
BL4.5 T·m −4%
Xmax4.8 mm −4%
Sensitivity84.3 dB –
FaitalPRO4FE32
£21.94 · 68% more, worseFs100 Hz +25%, worse
Qts0.53 –
Vas2.5 L +27%, worse
BL3.7 T·m −22%, worse
Xmax1.7 mm −66%, worse
Sensitivity88.1 dB +3.7, better
SB AcousticsSB12PFC25-8
£22.25 · 71% more, worseFs64 Hz −20%, better
Qts0.56 +6%
Vas4.3 L +118%, worse
BL4.5 T·m −5%
Xmax5 mm –
Sensitivity84.4 dB –
Sica3.5 L 1 SL
£23.65 · 81% more, worseFs108 Hz +35%, worse
Qts0.57 +8%
Vas1.4 L −29%, better
BL4.3 T·m −10%
Xmax1.5 mm −70%, worse
Sensitivity86.6 dB +2.2, better
Dayton AudioRS100P-8
£30.24 · 132% more, worseFs96 Hz +19%, worse
Qts0.54 –
Vas1.8 L −8%
BL4.0 T·m −16%, worse
Xmax3.7 mm −27%, worse
Sensitivity85.5 dB +1.1
Dayton AudioRS100P-4
£30.24 · 132% more, worseFs85 Hz +6%
Qts0.54 –
Vas1.9 L −6%
BL3.0 T·m −37%, worse
Xmax4 mm −21%, worse
Sensitivity84.3 dB –
Dayton AudioRS100-4
£30.24 · 132% more, worseFs85 Hz +6%
Qts0.53 –
Vas1.4 L −26%, better
BL3.2 T·m −33%, worse
Xmax4 mm −21%, worse
Sensitivity83.3 dB −1.1
Dayton AudioND105-4
£30.85 · 136% more, worseFs79 Hz –
Qts0.61 +15%, worse
Vas2.0 L –
BL4.5 T·m −4%
Xmax4 mm −21%, worse
Sensitivity83.7 dB −0.7
SB AcousticsSB12NRXF25-4
£45.28 · 247% more, worseFs61 Hz −24%, better
Qts0.48 −9%
Vas4.1 L +108%, worse
BL3.6 T·m −24%, worse
Xmax5 mm –
Sensitivity84.5 dB –
CelestionTFX0412
£69.00 · 429% more, worseFs95 Hz +19%, worse
Qts0.59 +11%, worse
Vas2.2 L +11%, worse
BL5.4 T·m +14%, better
Xmax4 mm −21%, worse
Sensitivity86.5 dB +2.1, better
Scanspeak10F/8414G10
£73.39 · 462% more, worseFs100 Hz +25%, worse
Qts0.51 −4%
Vas1.6 L −20%, better
BL4.3 T·m −9%
Xmax2.3 mm −54%, worse
Sensitivity85.9 dB +1.5
£169.48 · 1199% more, worse
Fs49 Hz −39%, better
Qts0.45 −15%, better
Vas12 L +509%, worse
BL4.6 T·m –
Xmax5 mm –
Sensitivity86 dB +1.6
FaitalPRO5HX220
£186.43 · 1329% more, worseFs135 Hz +69%, worse
Qts0.59 +11%, worse
Vas2.2 L +12%, worse
BL7.7 T·m +63%, better
Xmax4.6 mm −10%
Sensitivity91.4 dB +7, better
PeerlessSDS-100F25CP18-04
No current priceFs84 Hz +5%
Qts0.59 +11%, worse
Vas1.9 L −6%
BL4.5 T·m −5%
Xmax5.0 mm –
Sensitivity84.3 dB –
PeerlessHDS-P830870
No current priceFs100 Hz +25%, worse
Qts0.60 +13%, worse
Vas1.7 L −12%, better
BL4.9 T·m +4%
Xmax5 mm –
Sensitivity85 dB +0.6
No photo
PHL Audio930
No current priceFs130 Hz +63%, worse
Qts0.50 −6%
Vas2.5 L +27%, worse
BL8.7 T·m +84%, better
Xmax4.5 mm −11%, worse
Sensitivity91.9 dB +7.5, better
Dayton AudioDMA90-8
No current priceFs94 Hz +18%, worse
Qts0.57 +8%
Vas1.7 L −14%, better
BL4.7 T·m –
Xmax2.5 mm −50%, worse
Sensitivity84.9 dB +0.5
CIARECM133
No current priceFs112 Hz +40%, worse
Qts0.54 –
Vas2.5 L +27%, worse
BL5.0 T·m +7%
Xmax2 mm −60%, worse
Sensitivity89 dB +4.6, better
CelestionTF0512HE
No current priceFs85 Hz +6%
Qts0.54 –
Vas3.5 L +76%, worse
BL6.7 T·m +42%, better
Xmax4.8 mm −6%
Sensitivity87.7 dB +3.3, better
Tang BandW5-1685
No current priceFs50 Hz −38%, better
Qts0.46 −13%, better
Vas12.8 L +548%, worse
BL4.7 T·m –
Xmax6 mm +19%, better
Sensitivity86.8 dB +2.4, better
VisatonW 100 S - 8 Ohm
No current priceFs63 Hz −21%, better
Qts0.54 –
Vas5.4 L +175%, worse
BL4.3 T·m −9%
Xmax4 mm −21%, worse
Sensitivity85.1 dB +0.7
WavecorWF120BD09
No current priceFs54 Hz −33%, better
Qts0.50 −6%
Vas5.3 L +169%, worse
BL5.2 T·m +10%, better
Xmax4 mm −21%, worse
Sensitivity83.9 dB −0.5
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Parts Express4.0 out of 52 ratings · Checked 12 Oct 2026Read reviews on Parts Express
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Parts Express Import VAT and duty may apply | £13.05, the lowest price | 162 in stock | Visit shop at Parts Express |
Best price over time
Tracked since 11 Sep