GRS8SMP-8
£29.91 · 64% less, betterFs41 Hz −92%, better
Qts0.46 −68%, better
Vas32.5 L +3963%, worse
BL8.9 T·m –
Xmax5.5 mm +244%, better
Sensitivity88.1 dB −11.1, worse
8-inch LF driver · ALPHA series · 125 W
Eminence ALPHA-8MRA 8Ω
8 Ω · 400–4800 Hz
£110.00
0.9%Thomann · In stock · All 5 offers
- Fs
- 514Hz
- Xmax
- 1.6mm
- SPL
- 99dB
- Pe
- 125W
- BL
- 8.9T·m
- Vd
- 33cm³
- Qts
- 1.42
- Vas
- 0.8L
Eminence ALPHA-8MRA is an 8-inch 8 ohm LF driver rated at 125 W RMS. The validated T/S data includes Fs 514 Hz, Qts 1.42, Vas 0.8 L, Xmax 1.6 mm, sensitivity 99.2 dB, plus 33 cm³ Vd and 247 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 £83.77.
The published T/S values agree with each other
Thiele/Small
- Fs
- 514Hz
- Qts
- 1.42
- Qes
- 2.08
- Qms
- 4.5
- Vas
- 0.8L
- Re
- 7.3Ω
- Le
- 0.34mH
Motor and cone
- BL
- 8.9T·m
- Sd
- 206cm²
- Mms
- 7g
- Xmax
- 1.6mm
- Vd †
- 33cm³
Power and response
- Sensitivity †
- 99.2dB
- Manufacturer sensitivity
- 100.9dB
- Power
- 125W
- Impedance
- 8Ω
- Range
- 400–4800Hz
- EBP †
- 247 · Leans vented
Size and mounting
- Diameter
- 208.8mm
- Cutout
- 182.6mm
- Bolt circle
- 197.6mm
- Depth
- 82.5mm
- Weight
- 2.0kg
Other published values
- Cms
- 0.01mm/N
- Xmech
- 3
- Power Program
- 250
Sensitivity shows 99.2 dB, calculated from the T/S values. Eminence publishes 100.9 dB, 1.7 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Eminence lists
LF · Primary · 8″
- BL
- 8.9T·m
- Fs
- 514Hz
- Le
- 0.34mH
- Re
- 7.3Ω
- Sd
- 206cm²
- Cms
- 0.01mm/N
- Mms
- 7g
- Qes
- 2.08
- Qms
- 4.5
- Qts
- 1.42
- SPL
- 99.2dB
- Vas
- 0.8L
- Xmax
- 1.6mm
- Xmech
- 3
- Power
- 125W
- Impedance
- 8Ω
- Sensitivity
- 100.9dB
- Low limit
- 400Hz
- Power Program
- 250
- Calculated sensitivity †
- 99.2dB
- High limit
- 4800Hz
- Manufacturer sensitivity
- 100.9dB
- Weight
- 2.0kg
- Diameter
- 208.8mm
- Depth
- 82.5mm
- Cutout
- 182.6mm
- Bolt circle
- 197.6mm
02
Compare
Same-size drivers, compared with the ALPHA-8MRA. Clear differences are green when better and red when worse.
This driverALPHA-8MRA
Best price
£83.77
Fs
514 Hz
Qts
1.42
Vas
0.8 L
BL
8.9 T·m
Xmax
1.6 mm
Sensitivity
99.2 dB
Power
125 W
Sica8 H 1 CS
£33.41 · 60% less, betterFs50 Hz −90%, better
Qts0.54 −62%, better
Vas27.8 L +3375%, worse
BL8.7 T·m –
Xmax4 mm +150%, better
Sensitivity89.5 dB −9.7, worse
VisatonW 200 S
£50.23 · 40% less, betterFs30 Hz −94%, better
Qts0.33 −77%, better
Vas70 L +8650%, worse
BL9 T·m –
Xmax3.5 mm +119%, better
Sensitivity89.2 dB −10, worse
CIAREHWB200
£63.09 · 25% less, betterFs32 Hz −94%, better
Qts0.39 −73%, better
Vas59 L +7275%, worse
BL8.9 T·m –
Xmax7 mm +338%, better
Sensitivity88.8 dB −10.4, worse
PRV Audio8MR600X-4
£67.26 · 20% less, betterFs77 Hz −85%, better
Qts0.34 −76%, better
Vas19.6 L +2356%, worse
BL8.9 T·m –
Xmax5.1 mm +219%, better
Sensitivity96 dB −3.2, worse
Dayton AudioRS225-8
£67.31 · 20% less, betterFs28 Hz −94%, better
Qts0.38 −73%, better
Vas56.8 L +7000%, worse
BL9.1 T·m –
Xmax7 mm +338%, better
Sensitivity86.1 dB −13.1, worse
Eighteen Sound8MB500
£97.97 · 17% more, worseFs74 Hz −86%, better
Qts0.43 −70%, better
Vas21.5 L +2587%, worse
BL9 T·m –
Xmax6 mm +275%, better
Sensitivity94.4 dB −4.8, worse
VisatonGF 200
£132.67 · 58% more, worseFs30 Hz −94%, better
Qts0.34 −76%, better
Vas68 L +8400%, worse
BL9.2 T·m +3%
Xmax6 mm +275%, better
Sensitivity89 dB −10.2, worse
VisatonAL 200
£150.67 · 80% more, worseFs32 Hz −94%, better
Qts0.35 −75%, better
Vas77 L +9525%, worse
BL8.8 T·m –
Xmax7 mm +338%, better
Sensitivity90.1 dB −9.1, worse
£309.76 · 270% more, worse
Fs33 Hz −94%, better
Qts0.30 −79%, better
Vas72 L +8900%, worse
BL8.8 T·m –
Xmax7 mm +338%, better
Sensitivity90.6 dB −8.6, worse
AccutonC173-6-191
£325.80 · 289% more, worseFs39 Hz −92%, better
Qts0.34 −76%, better
Vas21.6 L +2600%, worse
BL8.8 T·m –
Xmax5 mm +213%, better
Sensitivity87.3 dB −11.9, worse
AccutonC220-6-221
£491.94 · 487% more, worseFs26 Hz −95%, better
Qts0.40 −72%, better
Vas86.2 L +10675%, worse
BL8.7 T·m –
Xmax5 mm +213%, better
Sensitivity87.8 dB −11.4, worse
PRV Audio8MR500SEAL
No current priceFs392 Hz −24%, better
Qts2.26 +59%, worse
Vas1.0 L +21%, worse
BL8.8 T·m –
Xmax4 mm +150%, better
Sensitivity95.6 dB −3.6, worse
JensenC8R-4
No current priceFs131 Hz −75%, better
Qts1.42 –
Vas10.3 L +1188%, worse
BL3.8 T·m −58%, worse
Xmax1 mm −38%, worse
Sensitivity92.3 dB −6.9, worse
JensenMOD8-20-4
No current priceFs111 Hz −78%, better
Qts1.74 +23%, worse
Vas13.1 L +1537%, worse
BL3.5 T·m −61%, worse
Xmax1.5 mm −6%
Sensitivity90.6 dB −8.6, worse
JensenP-A-JC8-30FA-16
No current priceFs130 Hz −75%, better
Qts1.26 −11%, better
Vas10.5 L +1212%, worse
BL8.2 T·m −8%
Xmax0.5 mm −69%, worse
Sensitivity95.5 dB −3.7, worse
MonacorSP-200X
No current priceFs50 Hz −90%, better
Qts0.52 −63%, better
Vas48 L +5900%, worse
BL6.1 T·m −31%, worse
Xmax1.6 mm –
Sensitivity91.4 dB −7.8, worse
No photo
PHL Audio2040
No current priceFs119 Hz −77%, better
Qts0.76 −46%, better
Vas9.3 L +1063%, worse
BL8.5 T·m −4%
Xmax2 mm +25%, better
Sensitivity94.4 dB −4.8, worse
No photo
PHL Audio2040NDU
No current priceFs119 Hz −77%, better
Qts0.76 −46%, better
Vas9.3 L +1063%, worse
BL8.5 T·m −4%
Xmax2 mm +25%, better
Sensitivity94.4 dB −4.8, worse
EminenceFS8.20A8
No current priceFs74 Hz −86%, better
Qts0.52 −63%, better
Vas6 L +650%, worse
BL8.9 T·m –
Xmax5 mm +213%, better
Sensitivity88.4 dB −10.8, worse
CelestionTF0815RE
No current priceFs65 Hz −87%, better
Qts0.53 −62%, better
Vas22.1 L +2666%, worse
BL8.9 T·m –
Xmax5.3 mm +228%, better
Sensitivity91.7 dB −7.5, worse
KartesianSUB180_VMS
No current priceFs31 Hz −94%, better
Qts0.33 −77%, better
Vas22.4 L +2706%, worse
BL8.8 T·m –
Xmax11 mm +588%, better
Sensitivity88.5 dB −10.7, worse
Eminence820H
No current priceFs144 Hz −72%, better
Qts0.88 −38%, better
Vas9.6 L +1102%, worse
BL5.7 T·m −36%, worse
Xmax1.6 mm –
Sensitivity97 dB −2.2, worse
Cube AudioF8 MAGUS
No current priceFs40 Hz −92%, better
Qts0.37 −74%, better
Vas53 L +6525%, worse
BL9 T·m –
Xmax3 mm +87%, better
Sensitivity91.7 dB −7.5, worse
CIARECMI200ND
No current priceFs80 Hz −84%, better
Qts0.37 −74%, better
Vas12.5 L +1462%, worse
BL8.8 T·m –
Xmax4.5 mm +181%, better
Sensitivity94.2 dB −5, worse
PRV Audio8MB500
No current priceFs69 Hz −86%, better
Qts0.75 −47%, better
Vas19.4 L +2323%, worse
BL8.7 T·m –
Xmax4.5 mm +181%, better
Sensitivity91.2 dB −8, worse
JensenP10R-FEN-8
No current priceFs87 Hz −83%, better
Qts1.79 +26%, worse
Vas28.5 L +3463%, worse
BL5.9 T·m −34%, worse
Xmax1 mm −38%, worse
Sensitivity91.8 dB −7.4, worse
HiViSS8IIR
No current priceFs33 Hz −94%, better
Qts0.28 −80%, better
Vas59.6 L +7350%, worse
BL9.2 T·m +3%
Xmax4.8 mm +200%, better
Sensitivity90.7 dB −8.5, worse
RS SpeakersW 220.50 FIBONACCI
No current priceFs33 Hz −94%, better
Qts0.36 −75%, better
Vas55.6 L +6850%, worse
BL8.6 T·m −3%
Xmax6 mm +275%, better
Sensitivity89.3 dB −9.9, worse
REDCATT8FHW-2
No current priceFs36 Hz −93%, better
Qts0.35 −75%, better
Vas34.3 L +4188%, worse
BL8.6 T·m −3%
Xmax3.6 mm +128%, better
Sensitivity88.3 dB −10.9, 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 Express4.5 out of 515 ratings · Checked 26 Oct 2026Read reviews on Parts Express
- Thomann4.1 out of 514 ratings · Checked 26 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 | £110.00, the lowest price | In stock | Visit shop at Thomann | |
Lean Audio | £76.15 | Out of stock | Visit shop at Lean Audio | |
Blue Aran 4-6 weeks | £82.24 | Usually available in 4-6 weeks | Visit shop at Blue Aran | |
Parts Express Import VAT and duty may apply | £83.77 | 1 in stock | Visit shop at Parts Express |
Best price over time
Tracked since 1 Apr
Recent changes
- 22 OctThomann£111.00 → £110.00Down 0.9% from £111.00
- 7 AugBlue Aran£87.79 → £82.24Down 6.3% from £87.79
- 10 JulThomann£113.00 → £111.00Down 1.8% from £113.00