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Overview
LF Driver
Dayton Audio
Dayton Audio RS125P-4
Dayton Audio RS125P-4 is a 5" 4 ohm LF driver rated at 30W RMS. The validated T/S data includes Fs 70Hz, Qts 0.48, Vas 4.0L, Xmax 4mm, sensitivity 85.8dB, plus 22cm³ Vd and 123 EBP. bits tracks UK vendor pricing, price movement, datasheet links, simulator import data, and similar drivers, with a current best price of £36.68.
Size
5"
Impedance
4Ω
RMS Power
30W
Sensitivity
85.8dB
90.0dBmanufacturer; using T/S-derived value (4.2dB delta).
EBP
123
Vented alignment
Vd
22cm³
Datasheet traces
Frequency and impedance curves traced from the manufacturer PDF.
45 degrees202 ptsp1medium
on-axis240 ptsp1medium
Curve provenanceInspect 3 tracesHide details
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
202 plotted pointsMedium confidence507 selected pixels of 1,322 - Trace datasheet-response-trace-poc/v1
on-axis
Frequency response
240 plotted pointsMedium confidence1,290 selected pixels of 1,290 - Trace datasheet-response-trace-poc/v1
impedance
Impedance response
240 plotted pointsMedium confidence1,041 selected pixels of 1,041
T/S Parameters
Valid
Fs70Hz
Qts0.48
Qes0.57
Qms3.2
Vas4.0L
Re3.1Ω
Le0.32mH
BL3.5Tm
Sd54cm²
Mms5g
Xmax4.0mm
SPL86dB
Power30W
Impedance4Ω
F Low70Hz
F High12000Hz
Pricing & availability
Price definitionsPrice movement
Best current price
£36.68
inc VAT·Vendor hidden
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Files use canonical values. Required mechanical fields are derived only where the target format needs them.
WinISD
.wdr · WinISD driver editor
Native WinISD driver record with the required SI conversions.
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.bastaelement · BASTA! loudspeaker simulator
Native BASTA! element file using its documented SI-unit fields.
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.wdr · VituixCAD 2 Enclosure
A WinISD driver file that VituixCAD imports directly.
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Dimensions & Physical
Weight1.2kg
Diameter125.5mm
Overall Depth55.0mm
Cutout Diameter94.0mm
Similar Drivers
Size stays fixed. Tune the T/S ranges to change what counts as a match, or add a specific driver to compare it directly.
Reference
Dayton Audio
RS125P-4
5"
Best current price
£36.68
Compare on
Matches sit inside every range. Size stays fixed automatically.
5 active T/S params, plus size.
12 matches
Compare a specific driver
Added drivers stay at the front of the list, whatever the ranges say.
39%
Similarity
27% cheaper£26.95
Dayton Audio
RS100P-8
4"
Lower price
Xmax3.7mm-7%
Qts0.54+13%
BL4Tm+13%
Vas1.8L-54%
Qes0.71+25%
39%
Similarity
80% more£65.90
Tang Band
W4-1720
4"
Higher price
Xmax5mm+25%
Qts0.42-12%
BL3.8Tm+9%
Vas5.9L+49%
Qes0.51-11%
72%
Similarity
Visaton
W 100 S - 4 Ohm
4"
Xmax4mm0%
Qts0.46-4%
BL3.7Tm+6%
Vas4.5L+13%
Qes0.54-5%
65%
Similarity
Dayton Audio
RS125-4
5"
Xmax4mm0%
Qts0.37-23%
BL3.6Tm+4%
Vas5.3L+33%
Qes0.45-21%
Image unavailable
59%
Similarity
Wavecor
WF120BD05
4.5"
Xmax4mm0%
Qts0.43-10%
BL4.1Tm+17%
Vas5.3L+33%
Qes0.45-21%
Image unavailable
55%
Similarity
Wavecor
WF118WA05
4.5"
Xmax3mm-25%
Qts0.46-4%
BL4.3Tm+23%
Vas3.5L-12%
Qes0.49-14%
54%
Similarity
Tang Band
W4-2099
4"
Xmax3mm-25%
Qts0.47-2%
BL3.7Tm+6%
Vas2.8L-31%
Qes0.54-5%
47%
Similarity
Visaton
W 100 S - 8 Ohm
4"
Xmax4mm0%
Qts0.54+13%
BL4.3Tm+23%
Vas5.4L+36%
Qes0.67+18%
Image unavailable
46%
Similarity
Wavecor
SW118WA01
4.5"
Xmax4mm0%
Qts0.39-19%
BL4.7Tm+35%
Vas3.3L-17%
Qes0.41-28%
Image unavailable
46%
Similarity
Wavecor
WF120BD06
4.5"
Xmax4mm0%
Qts0.4-17%
BL4.1Tm+17%
Vas6.2L+56%
Qes0.42-26%
45%
Similarity
Dayton Audio
RS100P-4
4"
Xmax4mm0%
Qts0.54+13%
BL3Tm-15%
Vas1.9L-53%
Qes0.67+18%
Image unavailable
42%
Similarity
Wavecor
WF120BD11
4.5"
Xmax3mm-25%
Qts0.39-19%
BL4.2Tm+20%
Vas3.8L-5%
Qes0.4-30%