SB AudienceBIANCO-18SW450
£135.53 · 111% more, worseFs28 Hz +22%, worse
Qts0.45 −17%, better
Vas370.4 L −22%, better
BL18.8 T·m −4%
Xmax10.9 mm +40%, better
Sensitivity94.4 dB +2.4, better
18-inch LF driver · 76 mm voice coil · 350 W
GRS 18PT-8 8Ω
8 Ω · 25–4000 Hz
£64.33
SteadyParts Express · 178 in stock · Ships from United States · All 2 offers
- Fs
- 23Hz
- Xmax
- 7.8mm
- SPL
- 92dB
- Pe
- 350W
- BL
- 19.5T·m
- Vd
- 963cm³
- Qts
- 0.54
- Vas
- 476L
GRS 18PT-8 is an 18-inch 8 ohm LF driver rated at 350 W RMS. The validated T/S data includes Fs 23 Hz, Qts 0.54, Vas 475.7 L, Xmax 7.8 mm, sensitivity 92 dB, plus 963 cm³ Vd and 40 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 £64.33.
The published T/S values agree with each other
Thiele/Small
- Fs
- 23Hz
- Qts
- 0.54
- Qes
- 0.58
- Qms
- 9.6
- Vas
- 475.7L
- Re
- 6.9Ω
- Le
- 1.90mH
Motor and cone
- BL
- 19.5T·m
- Sd
- 1234cm²
- Mms
- 218g
- Xmax
- 7.8mm
- Vd †
- 963cm³
- Voice coil
- 76mm
Power and response
- Sensitivity †
- 92dB
- Manufacturer sensitivity
- 93dB
- Power
- 350W
- Impedance
- 8Ω
- Range
- 25–4000Hz
- EBP †
- 40 · Leans sealed
Size and mounting
- Diameter
- 408.2mm
- Cutout
- 422.9mm
- Bolt circle
- 446.8mm
- Depth
- 190.0mm
Other published values
- Cms
- 0.22mm/N
- Power Peak
- 700
Sensitivity shows 92.0 dB, calculated from the T/S values. GRS publishes 93.0 dB, 1.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else GRS lists
LF · Primary · 18″
- BL
- 19.5T·m
- Fs
- 23Hz
- Le
- 1.90mH
- Re
- 6.9Ω
- Sd
- 1234cm²
- Cms
- 0.22mm/N
- Mms
- 218g
- Qes
- 0.58
- Qms
- 9.6
- Qts
- 0.54
- SPL
- 92dB
- Vas
- 475.7L
- Xmax
- 7.8mm
- Power
- 350W
- Impedance
- 8Ω
- Power Peak
- 700
- Sensitivity
- 93dB
- Low limit
- 25Hz
- Calculated sensitivity †
- 92dB
- High limit
- 4000Hz
- Manufacturer sensitivity
- 93dB
- Voice coil
- 76mm
- Diameter
- 408.2mm
- Depth
- 190.0mm
- Cutout
- 422.9mm
- Bolt circle
- 446.8mm
02
Compare
Same-size drivers, compared with the 18PT-8. Clear differences are green when better and red when worse.
This driver18PT-8
Best price
£64.33
Fs
23 Hz
Qts
0.54
Vas
475.7 L
BL
19.5 T·m
Xmax
7.8 mm
Sensitivity
92 dB
Power
350 W
SB AudienceBIANCO-18SW500
£151.79 · 136% more, worseFs30 Hz +30%, worse
Qts0.52 −4%
Vas334.8 L −30%, better
BL19.8 T·m –
Xmax9.2 mm +18%, better
Sensitivity94.3 dB +2.3, better
Beyma18WRS600
£185.00 · 188% more, worseFs30 Hz +30%, worse
Qts0.47 −13%, better
Vas354 L −26%, better
BL19 T·m –
Xmax8.5 mm +9%
Sensitivity95 dB +3, better
FaitalPRO18FH500
£213.51 · 232% more, worseFs30 Hz +30%, worse
Qts0.35 −35%, better
Vas417.9 L −12%, better
BL19 T·m –
Xmax9.3 mm +19%, better
Sensitivity97 dB +5, better
Beyma18LX60V2S
£218.33 · 239% more, worseFs35 Hz +52%, worse
Qts0.48 −11%, better
Vas236 L −50%, better
BL21.8 T·m +12%, better
Xmax8 mm –
Sensitivity95.1 dB +3.1, better
EminenceKILOMAX PRO-18A
£239.37 · 272% more, worseFs32 Hz +39%, worse
Qts0.47 −13%, better
Vas331.5 L −30%, better
BL17.2 T·m −12%, worse
Xmax10 mm +28%, better
Sensitivity95.5 dB +3.5, better
Precision DevicesPD.186/3
£259.00 · 303% more, worseFs34 Hz +49%, worse
Qts0.52 −4%
Vas192.2 L −60%, better
BL22.2 T·m +14%, better
Xmax10.5 mm +35%, better
Sensitivity93.5 dB +1.5
PRV Audio18SW2400
£293.02 · 356% more, worseFs36 Hz +58%, worse
Qts0.56 +4%
Vas192.8 L −59%, better
BL22.5 T·m +15%, better
Xmax12.5 mm +60%, better
Sensitivity94 dB +2, better
Dayton AudioUMII18-22
£376.75 · 486% more, worseFs22 Hz −4%
Qts0.53 –
Vas248.2 L −48%, better
BL19.2 T·m –
Xmax28 mm +259%, better
Sensitivity88 dB −4, worse
P.AudioIMF
No current priceFs33 Hz +43%, worse
Qts0.50 −7%
Vas240.1 L −50%, better
BL20.2 T·m +3%
Xmax7.5 mm −4%
Sensitivity93.7 dB +1.7
P.AudioP180/2243
No current priceFs35 Hz +52%, worse
Qts0.59 +9%
Vas159.1 L −67%, better
BL20.1 T·m +3%
Xmax8.5 mm +9%
Sensitivity92.2 dB –
CIARECSD184-22
No current priceFs37 Hz +61%, worse
Qts0.53 –
Vas141 L −70%, better
BL18.5 T·m −5%
Xmax13 mm +67%, better
Sensitivity92.9 dB +0.9
FaneIMPERIUM 18XL
No current priceFs36 Hz +57%, worse
Qts0.53 –
Vas205 L −57%, better
BL20.4 T·m +4%
Xmax10.5 mm +35%, better
Sensitivity94.4 dB +2.4, better
P.AudioC18-1000-V4
No current priceFs35 Hz +52%, worse
Qts0.56 –
Vas183.7 L −61%, better
BL22.5 T·m +16%, better
Xmax9.5 mm +22%, better
Sensitivity93.4 dB +1.4
P.AudioGST-181200-V3
No current priceFs35 Hz +52%, worse
Qts0.54 –
Vas180.2 L −62%, better
BL22.8 T·m +17%, better
Xmax6 mm −23%, worse
Sensitivity93.3 dB +1.3
P.Audio18BMA-1200S
No current priceFs39 Hz +70%, worse
Qts0.52 −4%
Vas141.5 L −70%, better
BL24 T·m +23%, better
Xmax6.8 mm −13%, worse
Sensitivity93.9 dB +1.9
Sica18 F 3 CP
No current priceFs32 Hz +37%, worse
Qts0.44 −19%, better
Vas321 L −33%, better
BL17.2 T·m −12%, worse
Xmax6.5 mm −17%, worse
Sensitivity94.9 dB +2.9, better
Acoustic EleganceIB18HT-8
No current priceFs18 Hz −20%, better
Qts0.57 +6%
Vas632.1 L +33%, worse
BL16 T·m −18%, worse
Xmax18 mm +131%, better
Sensitivity90 dB −2, worse
PeerlessFSL-1830R09-08
No current priceFs33 Hz +43%, worse
Qts0.58 +7%
Vas220 L −54%, better
BL21.1 T·m +8%
Xmax15.9 mm +104%, better
Sensitivity93.2 dB +1.2
Acoustic EleganceIB18AU-8
No current priceFs28 Hz +23%, worse
Qts0.59 +9%
Vas389.8 L −18%, better
BL16 T·m −18%, worse
Xmax18 mm +131%, better
Sensitivity93.3 dB +1.3
P.AudioC18-650EL-V3
No current priceFs41 Hz +78%, worse
Qts0.52 −4%
Vas179.1 L −62%, better
BL21.5 T·m +10%, better
Xmax5.3 mm −33%, worse
Sensitivity95.5 dB +3.5, better
P.Audio18FT-100SW
No current priceFs35 Hz +52%, worse
Qts0.47 −13%, better
Vas222.9 L −53%, better
BL24.2 T·m +24%, better
Xmax7.5 mm −4%
Sensitivity94.8 dB +2.8, better
BishopSoundBDP18/8
No current priceFs40 Hz +72%, worse
Qts0.56 +4%
Vas178.1 L −63%, better
BL23.0 T·m +18%, better
Xmax11.3 mm +45%, better
Sensitivity94.8 dB +2.8, better
P.AudioC18-1200
No current priceFs38 Hz +65%, worse
Qts0.55 –
Vas136.4 L −71%, better
BL25.1 T·m +29%, better
Xmax9.5 mm +22%, better
Sensitivity93.2 dB +1.2
No photo
PHL Audio7081
No current priceFs34 Hz +48%, worse
Qts0.41 −24%, better
Vas267.6 L −44%, better
BL22.7 T·m +16%, better
Xmax7.5 mm −4%
Sensitivity95.8 dB +3.8, better
P.AudioEX18-1000S
No current priceFs38 Hz +65%, worse
Qts0.61 +13%, worse
Vas190.6 L −60%, better
BL20.1 T·m +3%
Xmax5.3 mm −33%, worse
Sensitivity94.1 dB +2.1, better
Eighteen Sound18W1300
No current priceFs35 Hz +52%, worse
Qts0.33 −39%, better
Vas336 L −29%, better
BL20.4 T·m +5%
Xmax8.5 mm +9%
Sensitivity98.2 dB +6.2, better
PRV Audio18SW2000
No current priceFs32 Hz +40%, worse
Qts0.45 −17%, better
Vas289.9 L −39%, better
BL22.1 T·m +13%, better
Xmax9.6 mm +23%, better
Sensitivity95.2 dB +3.2, better
REDCATT18FIND-2
No current priceFs34 Hz +48%, worse
Qts0.46 −15%, better
Vas221 L −54%, better
BL21.3 T·m +9%
Xmax5.8 mm −25%, worse
Sensitivity94.5 dB +2.5, better
Acoustic EleganceIB18HT-4
No current priceFs18 Hz −20%, better
Qts0.57 +6%
Vas632.1 L +33%, worse
BL11.3 T·m −42%, worse
Xmax18 mm +131%, better
Sensitivity90 dB −2, 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 Express4.9 out of 520 ratings · Checked 25 Oct 2026Read reviews on Parts Express
- SoundImports5.0 out of 51 rating · Checked 25 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 |
|---|---|---|---|---|
Parts Express Import VAT and duty may apply | £64.33, the lowest price | 178 in stock | Visit shop at Parts Express | |
SoundImports Import VAT and duty may apply | £108.81 | 69% above the lowest price | 6 in stock | Visit shop at SoundImports |
Best price over time
Tracked since 1 Apr