GRS4SMP-8
£11.96 · 84% less, betterFs63 Hz −7%
Qts0.65 +16%, worse
Vas4 L −20%, better
BL4.2 T·m –
Xmax4 mm +344%, better
Sensitivity82.8 dB −2.5, worse
4.5-inch LF driver · Prestige series · 26 mm voice coil · 110 W
SEAS H1304-08 MCA12RC 8Ω
8 Ω · 400–5000 Hz
£76.51
17%RumoH · Ships from Netherlands · All 2 offers
- Fs
- 68Hz
- Xmax
- 0.9mm
- SPL
- 85dB
- Pe
- 110W
- BL
- 4.2T·m
- Vd
- 5cm³
- Qts
- 0.56
- Vas
- 5L
Published graphs
SEAS H1304-08 MCA12RC is a 4.5-inch 8 ohm LF driver rated at 110 W RMS. The validated T/S data includes Fs 68 Hz, Qts 0.56, Vas 5 L, Xmax 0.9 mm, sensitivity 85.3 dB, plus 5 cm³ Vd and 92 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 £76.51.
The published T/S values agree with each other
Thiele/Small
- Fs
- 68Hz
- Qts
- 0.56
- Qes
- 0.74
- Qms
- 2.4
- Vas
- 5L
- Re
- 6.3Ω
- Le
- 0.31mH
Motor and cone
- BL
- 4.2T·m
- Sd
- 55cm²
- Mms
- 5g
- Xmax
- 0.9mm
- Vd †
- 5cm³
- Voice coil
- 26mm
- Flux density
- 1.10T
Power and response
- Sensitivity †
- 85.3dB
- Manufacturer sensitivity
- 86dB
- Power
- 110W
- Impedance
- 8Ω
- Range
- 400–5000Hz
- EBP †
- 92 · Sealed or vented
Size and mounting
- Weight
- 0.66kg
Other published values
- Cms
- 1.20mm/N
- Rms
- 0.85kg/s
- Power Peak
- 400
† Calculated by bits from the published values
What this validation status means
Everything else SEAS lists
MF · Primary · 4.5″
- BL
- 4.2T·m
- Fs
- 68Hz
- Le
- 0.31mH
- Re
- 6.3Ω
- Sd
- 55cm²
- Cms
- 1.20mm/N
- Mms
- 5g
- Qes
- 0.74
- Qms
- 2.4
- Qts
- 0.56
- Rms
- 0.85kg/s
- SPL
- 85.3dB
- Vas
- 5L
- Xmax
- 0.9mm
- Power
- 110W
- Impedance
- 8Ω
- Power Peak
- 400
- Flux density
- 1.10T
- Sensitivity
- 86dB
- Low limit
- 400Hz
- Calculated sensitivity †
- 85.3dB
- High limit
- 5000Hz
- Manufacturer sensitivity
- 86dB
- Voice coil
- 26mm
- Weight
- 0.66kg
02
Compare
Same-size drivers, compared with the H1304-08 MCA12RC. Clear differences are green when better and red when worse.
This driverH1304-08 MCA12RC
Best price
£76.51
Fs
68 Hz
Qts
0.56
Vas
5 L
BL
4.2 T·m
Xmax
0.9 mm
Sensitivity
85.3 dB
Power
110 W
MonacorSPM-116/8
£13.40 · 82% less, betterFs75 Hz +10%, worse
Qts0.57 –
Vas4.5 L −10%, better
BL4.2 T·m –
Xmax1.5 mm +67%, better
Sensitivity85.7 dB –
MonacorSPM-100/8
£13.40 · 82% less, betterFs75 Hz +10%, worse
Qts0.67 +20%, worse
Vas4 L −20%, better
BL4.1 T·m –
Xmax1 mm +11%, better
Sensitivity84.3 dB −1
Sica3.5 F 1 CS
£16.66 · 78% less, betterFs107 Hz +57%, worse
Qts0.57 –
Vas1.4 L −72%, better
BL4.2 T·m –
Xmax1.5 mm +67%, better
Sensitivity86.4 dB +1.1
MonacorSP-60/8
£18.25 · 76% less, betterFs65 Hz −4%
Qts0.49 −13%, better
Vas6 L +20%, worse
BL4.1 T·m –
Xmax2 mm +122%, better
Sensitivity86.1 dB +0.8
SB AcousticsSB12PFC25-8
£21.98 · 71% less, betterFs64 Hz −6%
Qts0.56 –
Vas4.3 L −14%, better
BL4.5 T·m +7%
Xmax5 mm +456%, better
Sensitivity84.4 dB −0.9
SB AcousticsSB12PFCR25-8
£21.98 · 71% less, betterFs59 Hz −13%, better
Qts0.48 −14%, better
Vas5.3 L +6%
BL4.6 T·m +10%
Xmax5 mm +456%, better
Sensitivity85 dB –
Dayton AudioDMA105-8
£22.10 · 71% less, betterFs72 Hz +6%
Qts0.63 +12%, worse
Vas4.2 L −15%, better
BL4.5 T·m +7%
Xmax2.5 mm +178%, better
Sensitivity84.8 dB −0.5
PeerlessGBS-135F25AL02-04
£22.44 · 71% less, betterFs64 Hz −6%
Qts0.59 +5%
Vas5.3 L +6%
BL4.9 T·m +17%, better
Xmax5.4 mm +497%, better
Sensitivity85.1 dB –
Sica3.5 L 1 SL
£23.36 · 69% less, betterFs108 Hz +59%, worse
Qts0.57 –
Vas1.4 L −72%, better
BL4.3 T·m –
Xmax1.5 mm +67%, better
Sensitivity86.6 dB +1.3
CIAREHW129
£23.44 · 69% less, betterFs75 Hz +10%, worse
Qts0.55 –
Vas6.1 L +22%, worse
BL5.2 T·m +24%, better
Xmax3.9 mm +333%, better
Sensitivity87.3 dB +2, better
VisatonKT 100 V
£24.24 · 68% less, betterFs42 Hz −38%, better
Qts0.56 –
Vas7.5 L +50%, worse
BL3.3 T·m −21%, worse
Xmax2 mm +122%, better
Sensitivity81.1 dB −4.2, worse
VisatonW 100 S
£26.13 · 66% less, betterFs63 Hz −7%
Qts0.54 −4%
Vas5.4 L +8%
BL4.3 T·m –
Xmax2 mm +122%, better
Sensitivity85.1 dB –
PeerlessHDS-P830860
£26.17 · 66% less, betterFs72 Hz +6%
Qts0.54 −4%
Vas6.1 L +22%, worse
BL5.7 T·m +37%, better
Xmax5.5 mm +511%, better
Sensitivity87 dB +1.7
PeerlessSLS-135F32CP01-04
£26.37 · 66% less, betterFs55 Hz −19%, better
Qts0.54 −4%
Vas5.7 L +13%, worse
BL5.2 T·m +23%, better
Xmax7 mm +678%, better
Sensitivity84 dB −1.3
PeerlessHDS-P830991
£28.05 · 63% less, betterFs76 Hz +12%, worse
Qts0.55 –
Vas5.1 L –
BL6.3 T·m +51%, better
Xmax6.5 mm +628%, better
Sensitivity87.1 dB +1.8
Dayton AudioRS100-8
£29.91 · 61% less, betterFs92 Hz +36%, worse
Qts0.58 +4%
Vas1.4 L −71%, better
BL4.2 T·m –
Xmax3.5 mm +289%, better
Sensitivity83.7 dB −1.6
Dayton AudioRS100P-8
£29.91 · 61% less, betterFs96 Hz +41%, worse
Qts0.54 −4%
Vas1.8 L −64%, better
BL4.0 T·m −6%
Xmax3.7 mm +311%, better
Sensitivity85.5 dB –
Dayton AudioDMA105-4
£30.10 · 61% less, betterFs73 Hz +7%
Qts0.51 −9%
Vas4.2 L −15%, better
BL3.4 T·m −19%, worse
Xmax2.5 mm +178%, better
Sensitivity86.2 dB +0.9
CIAREPA100
£30.98 · 60% less, betterFs100 Hz +47%, worse
Qts0.59 +5%
Vas2.5 L −50%, better
BL4.4 T·m +5%
Xmax2.5 mm +178%, better
Sensitivity87.6 dB +2.3, better
Dayton AudioND140-4
£32.15 · 58% less, betterFs59 Hz −13%, better
Qts0.63 +12%, worse
Vas7.2 L +44%, worse
BL3.9 T·m −7%
Xmax4 mm +344%, better
Sensitivity85.2 dB –
VisatonB 100
£73.93 · 3% lessFs75 Hz +10%, worse
Qts0.52 −7%
Vas5.3 L +5%
BL4.1 T·m –
Xmax1.6 mm +83%, better
Sensitivity88.2 dB +2.9, better
VisatonHX 10
£99.54 · 30% more, worseFs80 Hz +18%, worse
Qts0.50 −11%, better
Vas5.1 L –
BL3.9 T·m −7%
Xmax1.5 mm +67%, better
Sensitivity88.3 dB +3, better
AccutonC90-6-724
£527.46 · 589% more, worseFs83 Hz +21%, worse
Qts0.60 +7%
Vas5.1 L –
BL6.0 T·m +42%, better
Xmax3 mm +233%, better
Sensitivity88.4 dB +3.1, better
Dayton AudioCFC120-8
No current priceFs60 Hz −12%, better
Qts0.56 –
Vas4.6 L −8%
BL5.1 T·m +22%, better
Xmax2.5 mm +178%, better
Sensitivity83.6 dB −1.7
WavecorWF118OM02
No current priceFs61 Hz −10%, better
Qts0.65 +16%, worse
Vas5.5 L +10%, worse
BL4.2 T·m –
Xmax1.9 mm +111%, better
Sensitivity84.5 dB −0.8
KartesianWIB120_VHE
No current priceFs68 Hz –
Qts0.56 –
Vas4.4 L −12%, better
BL4.0 T·m −5%
Xmax4 mm +344%, better
Sensitivity86 dB +0.7
HiViB4N
No current priceFs56 Hz −18%, better
Qts0.52 −7%
Vas4.5 L −10%, better
BL5.1 T·m +21%, better
Xmax3.2 mm +256%, better
Sensitivity83 dB −2.3, worse
Dayton AudioDMA90-8
No current priceFs94 Hz +39%, worse
Qts0.57 –
Vas1.7 L −66%, better
BL4.7 T·m +12%, better
Xmax2.5 mm +178%, better
Sensitivity84.9 dB –
WavecorWF118OM01
No current priceFs59 Hz −13%, better
Qts0.53 −5%
Vas5.5 L +10%, worse
BL3.4 T·m −19%, worse
Xmax1.9 mm +111%, better
Sensitivity85.1 dB –
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
- SoundImports4.7 out of 53 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 |
|---|---|---|---|---|
RumoH Import VAT and duty may apply | £76.51, the lowest price | Stock not listed | Visit shop at RumoH | |
SoundImports Import VAT and duty may apply | £92.06 | 20% above the lowest price | 1 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr
Recent changes
- 20 AprSoundImports£87.88 → £92.06Up 4.8% from £87.88