REDCATT4FR-1
£11.96Fs79 Hz +41%, worse
Qts0.52 –
Vas1.8 L −60%, better
BL4.8 T·m −6%
Xmax2.8 mm −13%, worse
Sensitivity83.7 dB +0.7
4-inch LF driver · B series · 25 mm voice coil · 25 W
HiVi B4N 8Ω
8 Ω
No price for delivery to the UK
- Fs
- 56Hz
- Xmax
- 3.2mm
- SPL
- 83dB
- Pe
- 25W
- BL
- 5.1T·m
- Vd
- 17cm³
- Qts
- 0.52
- Vas
- 5L
HiVi B4N is a 4-inch 8 ohm LF driver rated at 25 W RMS. The validated T/S data includes Fs 56 Hz, Qts 0.52, Vas 4.5 L, Xmax 3.2 mm, sensitivity 83 dB, plus 17 cm³ Vd and 89 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
- 56Hz
- Qts
- 0.52
- Qes
- 0.63
- Qms
- 3.9
- Vas
- 4.5L
- Re
- 6.5Ω
Motor and cone
- BL
- 5.1T·m
- Sd Derived
- 54cm²
- Mms
- 7g
- Xmax
- 3.2mm
- Vd †
- 17cm³
- Voice coil
- 25mm
Power and response
- Sensitivity †
- 83dB
- Manufacturer sensitivity
- 85dB
- Power
- 25W
- Impedance
- 8Ω
- EBP †
- 89 · Sealed or vented
Size and mounting
- Weight
- 0.8kg
Other published values
- Cms
- 1.11mm/N
- Power Peak
- 50
Sensitivity shows 83.0 dB, calculated from the T/S values. HiVi publishes 85.0 dB, 2.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else HiVi lists
LF · Primary · 4″
- BL
- 5.1T·m
- Fs
- 56Hz
- Re
- 6.5Ω
- Sd
- 54cm²
- Cms
- 1.11mm/N
- Mms
- 7g
- Qes
- 0.63
- Qms
- 3.9
- Qts
- 0.52
- SPL
- 83dB
- Vas
- 4.5L
- Xmax
- 3.2mm
- Power
- 25W
- Impedance
- 8Ω
- Power Peak
- 50
- Sensitivity
- 85dB
- Calculated sensitivity †
- 83dB
- Manufacturer sensitivity
- 85dB
- Voice coil
- 25mm
- Weight
- 0.8kg
02
Compare
Same-size drivers, compared with the B4N. Clear differences are green when better and red when worse.
This driverB4N
Best price
–
Fs
56 Hz
Qts
0.52
Vas
4.5 L
BL
5.1 T·m
Xmax
3.2 mm
Sensitivity
83 dB
Power
25 W
Dayton AudioPA130-8
£17.94Fs83 Hz +49%, worse
Qts0.51 –
Vas4.0 L −12%, better
BL6.4 T·m +26%, better
Xmax2 mm −38%, worse
Sensitivity87.8 dB +4.8, better
Sica5 D 1 CS
£19.68Fs79 Hz +41%, worse
Qts0.52 –
Vas5.5 L +22%, worse
BL5.7 T·m +12%, better
Xmax3 mm −6%
Sensitivity88.7 dB +5.7, better
SB AcousticsSB12PFC25-8
£21.98Fs64 Hz +14%, worse
Qts0.56 +8%
Vas4.3 L −4%
BL4.5 T·m −12%, worse
Xmax5 mm +56%, better
Sensitivity84.4 dB +1.4
CIAREHW129
£23.44Fs75 Hz +34%, worse
Qts0.55 +6%
Vas6.1 L +36%, worse
BL5.2 T·m –
Xmax3.9 mm +22%, better
Sensitivity87.3 dB +4.3, better
VisatonW 100 S
£26.13Fs63 Hz +13%, worse
Qts0.54 +4%
Vas5.4 L +20%, worse
BL4.3 T·m −16%, worse
Xmax2 mm −38%, worse
Sensitivity85.1 dB +2.1, better
Dayton AudioDMA105-4
£30.10Fs73 Hz +30%, worse
Qts0.51 –
Vas4.2 L −6%
BL3.4 T·m −33%, worse
Xmax2.5 mm −22%, worse
Sensitivity86.2 dB +3.2, better
Dayton AudioRS125P-8
£37.39Fs70 Hz +25%, worse
Qts0.44 −15%, better
Vas4.0 L −12%, better
BL5.1 T·m –
Xmax4 mm +25%, better
Sensitivity86.1 dB +3.1, better
Dayton AudioRS125T-8
£47.22Fs76 Hz +36%, worse
Qts0.50 −4%
Vas3.6 L −21%, better
BL5.0 T·m –
Xmax2.8 mm −13%, worse
Sensitivity86.1 dB +3.1, better
WavecorWF118WA02
£52.36Fs65 Hz +16%, worse
Qts0.44 −15%, better
Vas4.3 L −4%
BL5.8 T·m +14%, better
Xmax3 mm −6%
Sensitivity86.1 dB +3.1, better
Tang BandW4-2417
£64.39Fs65 Hz +16%, worse
Qts0.44 −15%, better
Vas4.6 L –
BL5.4 T·m +5%
Xmax2.5 mm −22%, worse
Sensitivity85.8 dB +2.8, better
Sica5 N 1.5 PL
£65.31Fs111 Hz +97%, worse
Qts0.56 +8%
Vas3 L −33%, better
BL6.2 T·m +22%, better
Xmax3 mm −6%
Sensitivity89.5 dB +6.5, better
WavecorWF118WA06
£82.89Fs66 Hz +18%, worse
Qts0.55 +6%
Vas3.5 L −22%, better
BL5.6 T·m +10%
Xmax3 mm −6%
Sensitivity84.3 dB +1.3
WavecorWF118WA05
£82.89Fs65 Hz +16%, worse
Qts0.46 −12%, better
Vas3.5 L −22%, better
BL4.3 T·m −16%, worse
Xmax3 mm −6%
Sensitivity85 dB +2, better
VisatonHX 10
£99.54Fs80 Hz +43%, worse
Qts0.50 −4%
Vas5.1 L +13%, worse
BL3.9 T·m −24%, worse
Xmax1.5 mm −53%, worse
Sensitivity88.3 dB +5.3, better
WavecorWF120BD14
£133.13Fs58 Hz –
Qts0.46 −12%, better
Vas3.9 L −13%, better
BL5.3 T·m +4%
Xmax3 mm −6%
Sensitivity83.8 dB +0.8
AccutonC90-6-724
£527.46Fs83 Hz +47%, worse
Qts0.60 +15%, worse
Vas5.1 L +13%, worse
BL6.0 T·m +17%, better
Xmax3 mm −6%
Sensitivity88.4 dB +5.4, better
Tang BandW4-2356
No current priceFs70 Hz +25%, worse
Qts0.45 −13%, better
Vas4.0 L −12%, better
BL4.9 T·m −3%
Xmax3 mm −6%
Sensitivity85.7 dB +2.7, better
Dayton AudioCFC120-8
No current priceFs60 Hz +7%
Qts0.56 +8%
Vas4.6 L –
BL5.1 T·m –
Xmax2.5 mm −22%, worse
Sensitivity83.6 dB +0.6
WavecorWF120BD13
No current priceFs59 Hz +5%
Qts0.47 −10%
Vas3.8 L −16%, better
BL5.3 T·m +4%
Xmax3 mm −6%
Sensitivity84 dB +1
WavecorWF120BD09
No current priceFs54 Hz −4%
Qts0.50 −4%
Vas5.3 L +18%, worse
BL5.2 T·m –
Xmax4 mm +25%, better
Sensitivity83.9 dB +0.9
WavecorWF120BD07
No current priceFs72 Hz +28%, worse
Qts0.51 –
Vas3.3 L −28%, better
BL5.5 T·m +8%
Xmax4 mm +25%, better
Sensitivity85.3 dB +2.3, better
WavecorMR120BD04
No current priceFs72 Hz +29%, worse
Qts0.55 +6%
Vas3.2 L −29%, better
BL5.2 T·m –
Xmax1.5 mm −53%, worse
Sensitivity85.1 dB +2.1, better
Tang BandW5-1611SA
No current priceFs60 Hz +7%
Qts0.44 −15%, better
Vas13.0 L +189%, worse
BL5.2 T·m –
Xmax3 mm −6%
Sensitivity88.7 dB +5.7, better
WavecorMR120BD03
No current priceFs73 Hz +30%, worse
Qts0.56 +8%
Vas3.1 L −31%, better
BL5.2 T·m –
Xmax1.5 mm −53%, worse
Sensitivity85.1 dB +2.1, better
LavoceWSF051.02
No current priceFs106 Hz +89%, worse
Qts0.60 +15%, worse
Vas3.3 L −28%, better
BL6.4 T·m +25%, better
Xmax3.1 mm −3%
Sensitivity89.7 dB +6.7, better
Tang BandW4-1337SD
No current priceFs70 Hz +25%, worse
Qts0.37 −29%, better
Vas4.9 L +8%
BL5.4 T·m +5%
Xmax3 mm −6%
Sensitivity87.3 dB +4.3, better
Tang BandW4-1320SI
No current priceFs75 Hz +34%, worse
Qts0.38 −27%, better
Vas5.2 L +16%, worse
BL5.1 T·m –
Xmax3 mm −6%
Sensitivity88.7 dB +5.7, better
Dayton AudioCFC120-4
No current priceFs57 Hz –
Qts0.45 −13%, better
Vas4.5 L –
BL4.2 T·m −17%, worse
Xmax2.5 mm −22%, worse
Sensitivity83.9 dB +0.9
CelestionTFX0512
No current priceFs69 Hz +23%, worse
Qts0.46 −12%, better
Vas5.4 L +20%, worse
BL6.4 T·m +26%, better
Xmax3.3 mm –
Sensitivity87.6 dB +4.6, better
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.9 out of 517 ratings · Checked 24 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 | £18.80 | Back order | Visit shop at SoundImports |