REDCATT8FIND
£58.44 · 37% less, betterFs70 Hz −20%, better
Qts0.25 +32%, worse
Vas18.2 L +40%, worse
BL14.3 T·m −14%, worse
Xmax2.2 mm −12%, worse
Sensitivity96 dB −2.3, worse
8-inch LF driver · 8PE series · 51 mm voice coil · 200 W
B&C 8PE21 8Ω
8 Ω · 90–5000 Hz
£95.00
1.3%Thomann · In stock · All 8 offers
- Fs
- 87Hz
- Xmax
- 2.5mm
- SPL
- 98dB
- Pe
- 200W
- BL
- 16.6T·m
- Vd
- 55cm³
- Qts
- 0.19
- Vas
- 13L
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/v2
free-air SPL
Frequency response
240 plotted pointsSource file SHA-256 f97c164be69e…Medium confidence5,336 selected pixels of 5,336 - Trace datasheet-response-trace-poc/v2
free-air impedance
Impedance response
240 plotted pointsSource file SHA-256 f97c164be69e…Medium confidence3,804 selected pixels of 3,804
Published graphs
B&C 8PE21 is an 8-inch 8 ohm LF driver rated at 200 W RMS. The validated T/S data includes Fs 87 Hz, Qts 0.19, Vas 13 L, Xmax 2.5 mm, sensitivity 98.3 dB, plus 55 cm³ Vd and 435 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 £93.17.
The published T/S values agree with each other
Thiele/Small
- Fs
- 87Hz
- Qts
- 0.19
- Qes
- 0.20
- Qms
- 3.8
- Vas
- 13L
- Re
- 5.6Ω
- Le
- 0.50mH
Motor and cone
- BL
- 16.6T·m
- Sd
- 220cm²
- Mms
- 18g
- Xmax
- 2.5mm
- Vd †
- 55cm³
- Voice coil
- 51mm
- Flux density
- 1.25T
Power and response
- Sensitivity †
- 98.3dB
- Manufacturer sensitivity
- 98dB
- Power
- 200W
- Nominal power
- 200W
- Impedance
- 8Ω
- Min. impedance
- 7.2Ω
- Range
- 90–5000Hz
- EBP †
- 435 · Leans vented
Size and mounting
- Diameter
- 225mm
- Cutout
- 187mm
- Bolt circle
- 210mm
- Depth
- 91mm
- Weight
- 4.3kg
† Calculated by bits from the published values
What this validation status means
Everything else B&C lists
LF
- BL
- 16.6T·m
- Fs
- 87Hz
- Le
- 0.50mH
- Re
- 5.6Ω
- Sd
- 220cm²
- Mms
- 18g
- Qes
- 0.20
- Qms
- 3.8
- Qts
- 0.19
- SPL
- 98.3dB
- Vas
- 13L
- Xmax
- 2.5mm
- Power
- 200W
- Impedance
- 8Ω
- Flux density
- 1.25T
- Sensitivity
- 98dB
- Low limit
- 90Hz
- Nominal power
- 200W
- Calculated sensitivity †
- 98.3dB
- High limit
- 5000Hz
- Manufacturer sensitivity
- 98dB
- Min. impedance
- 7.2Ω
- Voice coil
- 51mm
- Weight
- 4.3kg
- Diameter
- 225mm
- Depth
- 91mm
- Cutout
- 187mm
- Bolt circle
- 210mm
- Bl
- 16.6 Tm
- Fs
- 87 Hz
- Le
- 0.5 mH
- Re
- 5.6 Ω
- Sd
- 220 cm² (34.1 in²)
- Ebp
- 435 Hz
- Mms
- 18 g
- Qes
- 0.2
- Qms
- 3.8
- Qts
- 0.19
- Vas
- 13 dm³ (0.46 ft³)
- Η0
- 4.1 %
- Cone
- RCK008PE218
- Xmax
- 2.5 mm
- Xvar
- 4.5 mm
- Depth
- 91 mm (3.58 in)
- Spider
- Single
- Cone shape
- Radial
- Net weight
- 4.25 kg (9.37 lb)
- Pole design
- Straight Pole
- Sensitivity
- 98 dB
- Flux density
- 1.25 T
- Shipping box
- 255x255x150 mm (10.04x10.04x5.91 in)
- Winding depth
- 9 mm (0.37 in)
- Shipping units
- 1 pcs
- Surround shape
- Triple Roll
- Former material
- Kapton
- Frequency range
- 90 Hz - 5000 Hz
- Magnet material
- Ferrite
- Shipping weight
- 4.7 kg (10.36 lb)
- Nominal diameter
- 200 mm (8 in)
- Overall diameter
- 225 mm (8.86 in)
- Winding material
- Copper
- Minimum impedance
- 7.2 Ω
- Nominal impedance
- 8 Ω
- Magnetic gap depth
- 8 mm (0.31 in)
- Voice coil diameter
- 51 mm (2 in)
- Bolt circle diameter
- 210 mm (8.27 in)
- Woofer cone treatment
- None
- Baffle cutout diameter
- 187 mm (7.36 in)
- Nominal power handling
- 200 W
- Continuous power handling
- 400 W
- Flange and gasket thickness
- 11 mm (0.43 in)
- Air volume occupied by driver
- 1.2 dm³ (0.04 ft³)
02
Compare
Same-size drivers, compared with the 8PE21. Clear differences are green when better and red when worse.
This driver8PE21
Best price
£93.17
Fs
87 Hz
Qts
0.19
Vas
13 L
BL
16.6 T·m
Xmax
2.5 mm
Sensitivity
98.3 dB
Power
200 W
LavoceMAF082.00
£75.38 · 19% less, betterFs85 Hz –
Qts0.20 +5%
Vas11.3 L −13%, better
BL17.2 T·m +4%
Xmax2.6 mm +4%
Sensitivity97 dB −1.3
Eighteen Sound8M400F
£114.19 · 23% more, worseFs89 Hz –
Qts0.26 +37%, worse
Vas13.7 L +5%
BL13.1 T·m −21%, worse
Xmax3 mm +20%, better
Sensitivity97.4 dB −0.9
B&C8FW51
£116.03 · 25% more, worseFs74 Hz −15%, better
Qts0.21 +11%, worse
Vas12 L −8%
BL17.7 T·m +7%
Xmax6 mm +140%, better
Sensitivity95.7 dB −2.6, worse
B&C8NW51
£120.85 · 30% more, worseFs74 Hz −15%, better
Qts0.17 −11%, better
Vas11 L −15%, better
BL18.9 T·m +14%, better
Xmax6 mm +140%, better
Sensitivity95.7 dB −2.6, worse
B&C8NDL64
£121.96 · 31% more, worseFs80 Hz −8%
Qts0.25 +32%, worse
Vas9.6 L −26%, better
BL17.5 T·m +5%
Xmax4.5 mm +80%, better
Sensitivity95 dB −3.3, worse
B&C8MDN51
£136.46 · 46% more, worseFs70 Hz −20%, better
Qts0.20 +5%
Vas16 L +23%, worse
BL15.3 T·m −8%
Xmax6 mm +140%, better
Sensitivity96.2 dB −2.1, worse
Eighteen Sound8NTLW2000
£138.90 · 49% more, worseFs71 Hz −18%, better
Qts0.21 +11%, worse
Vas13 L –
BL17.5 T·m +5%
Xmax4.4 mm +76%, better
Sensitivity95.5 dB −2.8, worse
CelestionFTX0820
£139.00 · 49% more, worseFs79 Hz −9%
Qts0.28 +47%, worse
Vas13.1 L –
BL14.6 T·m −12%, worse
Xmax4 mm +60%, better
Sensitivity95.2 dB −3.1, worse
Beyma8MC500ND
£140.00 · 50% more, worseFs69 Hz −21%, better
Qts0.18 −5%
Vas15.9 L +22%, worse
BL16.7 T·m –
Xmax5 mm +100%, better
Sensitivity96.4 dB −1.9
LavoceWAN082.02
£148.73 · 60% more, worseFs80 Hz −8%
Qts0.23 +21%, worse
Vas9.0 L −31%, better
BL17.8 T·m +7%
Xmax5.8 mm +132%, better
Sensitivity94.7 dB −3.6, worse
RCFMB8N251
£150.76 · 62% more, worseFs68 Hz −22%, better
Qts0.25 +32%, worse
Vas13 L –
BL15.2 T·m −8%
Xmax5 mm +100%, better
Sensitivity94 dB −4.3, worse
Sica8 K 3 PL
£160.07 · 72% more, worseFs68 Hz −22%, better
Qts0.25 +32%, worse
Vas12.2 L −6%
BL16.1 T·m −3%
Xmax5 mm +100%, better
Sensitivity93.6 dB −4.7, worse
Eighteen Sound8NTLS2000
£162.28 · 74% more, worseFs41 Hz −53%, better
Qts0.19 –
Vas27 L +108%, worse
BL17.2 T·m +4%
Xmax7.4 mm +196%, better
Sensitivity91.9 dB −6.4, worse
MonacorFTX0820/8
£163.03 · 75% more, worseFs79 Hz −9%
Qts0.28 +47%, worse
Vas13.1 L –
BL14.6 T·m −12%, worse
Xmax4 mm +60%, better
Sensitivity95.2 dB −3.1, worse
Beyma8MC300ND
£177.87 · 91% more, worseFs62 Hz −29%, better
Qts0.22 +16%, worse
Vas18 L +38%, worse
BL16 T·m −4%
Xmax6 mm +140%, better
Sensitivity94.6 dB −3.7, worse
Oberton8M250
No current priceFs74 Hz −15%, better
Qts0.20 +6%
Vas15.6 L +20%, worse
BL13.7 T·m −17%, worse
Xmax2.8 mm +10%, better
Sensitivity97 dB −1.3
PeerlessNSM-0820R00-04
No current priceFs77 Hz −11%, better
Qts0.18 −5%
Vas11 L −15%, better
BL13.7 T·m −17%, worse
Xmax6.6 mm +164%, better
Sensitivity96.3 dB −2, worse
LavoceWAF082.01
No current priceFs76 Hz −13%, better
Qts0.21 +11%, worse
Vas10.2 L −21%, better
BL17.9 T·m +8%
Xmax5.8 mm +132%, better
Sensitivity95.1 dB −3.2, worse
CelestionNTR08-2009D
No current priceFs71 Hz −18%, better
Qts0.21 +11%, worse
Vas11.7 L −10%, better
BL18.0 T·m +9%
Xmax6.5 mm +160%, better
Sensitivity94.6 dB −3.7, worse
No photo
PHL Audio2513NDS
No current priceFs71 Hz −18%, better
Qts0.18 −5%
Vas12.2 L −6%
BL27.5 T·m +66%, better
Xmax4 mm +60%, better
Sensitivity95.6 dB −2.7, worse
Oberton8MVCX (8NMB250VCX)
No current priceFs85 Hz –
Qts0.16 −14%, better
Vas10.7 L −18%, better
BL17.8 T·m +7%
Xmax4.3 mm +70%, better
Sensitivity98 dB –
B&C8CLA64
No current priceFs71 Hz −18%, better
Qts0.24 +26%, worse
Vas12.5 L −4%
BL16.4 T·m –
Xmax5.3 mm +112%, better
Sensitivity94.6 dB −3.7, worse
Acoustic EleganceTD8M-8
No current priceFs76 Hz −13%, better
Qts0.26 +37%, worse
Vas11.3 L −13%, better
BL15.5 T·m −7%
Xmax3 mm +20%, better
Sensitivity94.6 dB −3.7, worse
MonacorSP-308CX
No current priceFs80 Hz −8%
Qts0.36 +89%, worse
Vas15.4 L +18%, worse
BL12.1 T·m −27%, worse
Xmax2.5 mm –
Sensitivity94.7 dB −3.6, worse
Oberton8NB201
No current priceFs71 Hz −19%, better
Qts0.24 +29%, worse
Vas12.5 L −4%
BL14.4 T·m −13%, worse
Xmax5.3 mm +110%, better
Sensitivity94.4 dB −3.9, worse
PRV Audio8MR600X-NDY
No current priceFs88 Hz –
Qts0.29 +53%, worse
Vas12.6 L −3%
BL15.2 T·m −9%
Xmax3.8 mm +50%, better
Sensitivity96.5 dB −1.8
REDCATT81NPM-1
No current priceFs72 Hz −17%, better
Qts0.33 +74%, worse
Vas10.3 L −21%, better
BL16.7 T·m –
Xmax6 mm +140%, better
Sensitivity92.6 dB −5.7, worse
JensenBP8150-8
No current priceFs75 Hz −14%, better
Qts0.33 +74%, worse
Vas13.1 L –
BL13.3 T·m −20%, worse
Xmax3.1 mm +24%, better
Sensitivity93.8 dB −4.5, worse
CIARENDK8
No current priceFs57 Hz −34%, better
Qts0.40 +111%, worse
Vas12.9 L –
BL14.4 T·m −13%, worse
Xmax8.5 mm +240%, better
Sensitivity89.4 dB −8.9, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- Parts Express4.8 out of 513 ratings · Checked 9 Oct 2026Read reviews on Parts Express
- Thomann5.0 out of 51 rating · Checked 9 Oct 2026Read reviews on Thomann
Each shop collects its own ratings. Bits shows them as published and doesn't verify them.
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
Thomann | £95.00, the lowest price | In stock | Visit shop at Thomann | |
Blue Aran | £96.00 | 1.1% above the lowest price | Due 16 Oct 2026 | Visit shop at Blue Aran |
JP Leisure Not currently listed · Last seen 7 Aug 2026 | £96.25 | 1.3% above the lowest price | In stock | Visit shop at JP Leisure |
JP Leisure | £96.25 | 1.3% above the lowest price | In stock | Visit shop at JP Leisure |
Thomann Not currently listed · Last seen 20 Apr 2026 | £98.00 | 3.2% above the lowest price | Stock not listed | Visit shop at Thomann |
Parts Express Import VAT and duty may apply | £118.53 | 25% above the lowest price | 15 in stock | Visit shop at Parts Express |
Best price over time
Tracked since 1 Apr
Recent changes
- 4 OctThomann£98.00 → £95.00Down 3.1% from £98.00
- 26 SepThomann£96.00 → £98.00Up 2.1% from £96.00
- 21 SepThomann£97.00 → £96.00Down 1.0% from £97.00