6.5-inch LF driver · 38 mm voice coil

Sica 6.5 C 1.5 CP 8Ω

Name: Sica 6.5 C 1.5 CP 8 Ohm
Brand: Sica
SKU: 6.5 C 1.5 CP
Availability: InStock

8 Ω

£129.50

SoundImports · 2 in stock · Ships from Netherlands · All 1 offer

Open in 00 Simulator

Fs: 51Hz
Xmax: 4.5mm
SPL: 89dB
Pe: –
BL: 7.2T·m
Vd: 55cm³
Qts: 0.39
Vas: 16L

See all 23 specs

Specifications

Published by Sica

Manufacturer page

Datasheet PDF

Sica 6.5 C 1.5 CP is a 6.5-inch 8 ohm LF driver. The validated T/S data includes Fs 51 Hz, Qts 0.39, Vas 15.9 L, Xmax 4.5 mm, sensitivity 89 dB, plus 55 cm³ Vd and 121 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 £129.50.

The published T/S values agree with each other

Thiele/Small

Fs: 51Hz
Qts: 0.39
Qes: 0.42
Qms: 6.1
Vas: 15.9L
Re: 5.1Ω
Le: 0.44mH

Motor and cone

BL: 7.2T·m
Sd: 123cm²
Mms: 13g
Xmax: 4.5mm
Vd †: 55cm³
Voice coil: 38mm

Power and response

Sensitivity †: 89dB
Manufacturer sensitivity: 91dB
Impedance: 8Ω
EBP †: 121 · Leans vented

Size and mounting

Diameter: 175mm
Cutout: 143mm
Bolt circle: 164.2mm
Depth: 79.5mm
Weight: 1.7kg

Other published values

Cms: 0.74mm/N

Sensitivity shows 89.0 dB, calculated from the T/S values. Sica publishes 91.0 dB, 2.0 dB apart.

Excursion and motor values come from the LF section; the frequency range spans every section.

† Calculated by bits from the published values

What this validation status means

Components and manufacturer details

LF · LF · 6.5″

BL: 7.2T·m
Fs: 51Hz
Le: 0.44mH
Re: 5.1Ω
Sd: 123cm²
Cms: 0.74mm/N
Mms: 13g
Qes: 0.42
Qms: 6.1
Qts: 0.39
SPL: 89dB
Vas: 15.9L
Xmax: 4.5mm
Impedance: 8Ω
Sensitivity: 91dB
Calculated sensitivity †: 89dB
Manufacturer sensitivity: 91dB
Voice coil: 38mm

HF · HF

Fs: 1500Hz
Re: 6Ω
SPL: 93.9dB
Impedance: 8Ω
Sensitivity: 93.9dB
Manufacturer sensitivity: 93.9dB
Voice coil: 25mm
Crossover: 3000Hz

Compare

Same-size drivers, compared with the 6.5 C 1.5 CP. Clear differences are green when better and red when worse.

This driver6.5 C 1.5 CP

Best price

£129.50

51 Hz

Qts

0.39

Vas

15.9 L

7.2 T·m

Xmax

4.5 mm

Sensitivity

89 dB

Power

–

Dayton AudioGF180-4

£18.63 · 86% less

Fs49 Hz −4%

Qts0.42 +8%

Vas16.5 L +4%

BL6.5 T·m −10%

Xmax4 mm −11%

Sensitivity88.1 dB −0.9

HiViM6N

£20.85 · 84% less

Fs46 Hz −9%

Qts0.39 –

Vas21.9 L +38%

BL7.8 T·m +8%

Xmax4.3 mm −4%

Sensitivity89.1 dB –

Dayton AudioSIG180-4

£40.97 · 68% less

Fs41 Hz −20%

Qts0.38 –

Vas23.2 L +46%

BL6.6 T·m −8%

Xmax5 mm +11%

Sensitivity87.8 dB −1.2

HiViF6

£41.75 · 68% less

Fs45 Hz −11%

Qts0.35 −10%

Vas16.4 L +3%

BL9 T·m +25%

Xmax4.3 mm −4%

Sensitivity88 dB −1

CIAREHW161N

£43.46 · 66% less

Fs47 Hz −7%

Qts0.37 −5%

Vas19.9 L +25%

BL7.4 T·m –

Xmax5 mm +11%

Sensitivity88.6 dB –

Dayton AudioRS150P-4A

£44.70 · 65% less

Fs44 Hz −14%

Qts0.34 −13%

Vas15.7 L –

BL4.4 T·m −39%

Xmax4.4 mm –

Sensitivity87 dB −2

Scanspeak18W/8434G00

£57.57 · 56% less

Fs50 Hz –

Qts0.43 +10%

Vas19.5 L +23%

BL7.2 T·m –

Xmax4.2 mm −7%

Sensitivity89.3 dB –

CIAREHW172

£62.68 · 52% less

Fs46 Hz −9%

Qts0.37 −5%

Vas20 L +26%

BL7.6 T·m +5%

Xmax4.5 mm –

Sensitivity88.4 dB −0.6

CIAREHWB160

£65.19 · 50% less

Fs43 Hz −15%

Qts0.37 −5%

Vas28 L +76%

BL7.3 T·m –

Xmax4.5 mm –

Sensitivity89.4 dB –

Sica5.5 H 1.5 CP

£74.34 · 43% less

Fs48 Hz −6%

Qts0.37 −5%

Vas8.4 L −47%

BL7.2 T·m –

Xmax4.5 mm –

Sensitivity85.7 dB −3.3

CIARECMI160ND

£128.55 · Same price

Fs73 Hz +44%

Qts0.41 +5%

Vas6 L −62%

BL7.8 T·m +8%

Xmax4.5 mm –

Sensitivity89.2 dB –

RS SpeakersMW 174.38 FIBONACCI

£145.42 · 12% more

Fs46 Hz −10%

Qts0.39 –

Vas18.7 L +18%

BL7.0 T·m –

Xmax4.5 mm –

Sensitivity88.3 dB −0.7

WavecorWF152BD12

£149.60 · 16% more

Fs46 Hz −9%

Qts0.38 –

Vas9.6 L −40%

BL7.2 T·m –

Xmax4.5 mm –

Sensitivity85.7 dB −3.3

Scanspeak15W/8531K00

£150.70 · 16% more

Fs39 Hz −23%

Qts0.38 –

Vas16.7 L +5%

BL6.6 T·m −8%

Xmax6.5 mm +44%

Sensitivity85.8 dB −3.2

Scanspeak15W/8530K00

£157.03 · 21% more

Fs39 Hz −23%

Qts0.39 –

Vas16 L –

BL6.6 T·m −8%

Xmax6.5 mm +44%

Sensitivity85.5 dB −3.5

AccutonC168-6-890

£919.31 · 610% more

Fs41 Hz −19%

Qts0.44 +13%

Vas15 L −6%

BL7.5 T·m +4%

Xmax5 mm +11%

Sensitivity85.3 dB −3.7

WavecorWF152BD11

No current price

Fs53 Hz +4%

Qts0.40 –

Vas8.6 L −46%

BL7.2 T·m –

Xmax4.5 mm –

Sensitivity86.9 dB −2.1

Tang BandW6-2313

No current price

Fs50 Hz –

Qts0.40 –

Vas13.3 L −16%

BL7.1 T·m –

Xmax4 mm −11%

Sensitivity87.8 dB −1.2

HiViF6N

No current price

Fs48 Hz −6%

Qts0.43 +10%

Vas19.1 L +20%

BL7.3 T·m –

Xmax4.5 mm –

Sensitivity88.7 dB –

WavecorWF152BD07

No current price

Fs52 Hz –

Qts0.39 –

Vas9.2 L −42%

BL8 T·m +11%

Xmax4.5 mm –

Sensitivity86.9 dB −2.1

WavecorWF152BD15

No current price

Fs52 Hz –

Qts0.39 –

Vas9.2 L −42%

BL8 T·m +11%

Xmax4.5 mm –

Sensitivity86.9 dB −2.1

HiViD6.4+

No current price

Fs44 Hz −13%

Qts0.36 −8%

Vas13.9 L −13%

BL6.6 T·m −9%

Xmax4 mm −11%

Sensitivity86.5 dB −2.5

CIARECMI160

No current price

Fs70 Hz +38%

Qts0.41 +5%

Vas7.8 L −51%

BL7.2 T·m –

Xmax4.5 mm –

Sensitivity89.8 dB +0.8

HiViE6.5N

No current price

Fs43 Hz −15%

Qts0.40 –

Vas21 L +32%

BL7.1 T·m –

Xmax4.3 mm −6%

Sensitivity87.2 dB −1.8

CIARECW161N

No current price

Fs52 Hz –

Qts0.35 −10%

Vas17.4 L +9%

BL6.1 T·m −16%

Xmax4 mm −11%

Sensitivity89.7 dB +0.7

HiViD6.8+

No current price

Fs44 Hz −13%

Qts0.36 −8%

Vas14.4 L −9%

BL9.0 T·m +24%

Xmax4 mm −11%

Sensitivity86.7 dB −2.3

WavecorWF152BD08

No current price

Fs46 Hz −9%

Qts0.35 −10%

Vas11.5 L −28%

BL8 T·m +11%

Xmax4.5 mm –

Sensitivity87 dB −2

WavecorWF152BD16

No current price

Fs46 Hz −9%

Qts0.35 −10%

Vas11.5 L −28%

BL8 T·m +11%

Xmax4.5 mm –

Sensitivity87 dB −2

HiViSS6N

No current price

Fs44 Hz −13%

Qts0.36 −8%

Vas23.9 L +50%

BL7.6 T·m +5%

Xmax4.3 mm −4%

Sensitivity89.1 dB –

KartesianWOM155_VKI-C

No current price

Fs38 Hz −25%

Qts0.37 −5%

Vas17.9 L +13%

BL7.1 T·m –

Xmax10 mm +122%

Sensitivity86 dB −3

Search similar

Tune the match

Choose the published values that matter to your design. Size stays matched to this driver.

Qts

Qes

Vas

Xmax

Where to buy

Prices for delivery to the UK, including VAT. How prices work

Watch price

Shop	Price	Against the lowest	Stock	Link
SoundImports Checked 4 Nov 2026 · Ships from Netherlands · Source: inc VAT Import VAT and duty may apply	£129.50, the lowest price		2 in stock	Visit shop at SoundImports

Best price over time

Tracked since 4 Nov

bits00 AUDIO

6.5-inch LF driver · 38 mm voice coil

Sica 6.5 C 1.5 CP 8Ω

8 Ω

£129.50

SoundImports · 2 in stock · Ships from Netherlands · All 1 offer

Open in 00 Simulator

Fs: 51Hz
Xmax: 4.5mm
SPL: 89dB
Pe: –
BL: 7.2T·m
Vd: 55cm³
Qts: 0.39
Vas: 16L

See all 23 specs

Specifications

Published by Sica

Manufacturer page

Datasheet PDF

The published T/S values agree with each other

Thiele/Small

Fs: 51Hz
Qts: 0.39
Qes: 0.42
Qms: 6.1
Vas: 15.9L
Re: 5.1Ω
Le: 0.44mH

Motor and cone

BL: 7.2T·m
Sd: 123cm²
Mms: 13g
Xmax: 4.5mm
Vd †: 55cm³
Voice coil: 38mm

Power and response

Sensitivity †: 89dB
Manufacturer sensitivity: 91dB
Impedance: 8Ω
EBP †: 121 · Leans vented

Size and mounting

Diameter: 175mm
Cutout: 143mm
Bolt circle: 164.2mm
Depth: 79.5mm
Weight: 1.7kg

Other published values

Cms: 0.74mm/N

Sensitivity shows 89.0 dB, calculated from the T/S values. Sica publishes 91.0 dB, 2.0 dB apart.

Excursion and motor values come from the LF section; the frequency range spans every section.

† Calculated by bits from the published values

What this validation status means

Components and manufacturer details

LF · LF · 6.5″

BL: 7.2T·m
Fs: 51Hz
Le: 0.44mH
Re: 5.1Ω
Sd: 123cm²
Cms: 0.74mm/N
Mms: 13g
Qes: 0.42
Qms: 6.1
Qts: 0.39
SPL: 89dB
Vas: 15.9L
Xmax: 4.5mm
Impedance: 8Ω
Sensitivity: 91dB
Calculated sensitivity †: 89dB
Manufacturer sensitivity: 91dB
Voice coil: 38mm

HF · HF

Fs: 1500Hz
Re: 6Ω
SPL: 93.9dB
Impedance: 8Ω
Sensitivity: 93.9dB
Manufacturer sensitivity: 93.9dB
Voice coil: 25mm
Crossover: 3000Hz

Compare

Same-size drivers, compared with the 6.5 C 1.5 CP. Clear differences are green when better and red when worse.

This driver6.5 C 1.5 CP

Best price

£129.50

51 Hz

Qts

0.39

Vas

15.9 L

7.2 T·m

Xmax

4.5 mm

Sensitivity

89 dB

Power

–

Dayton AudioGF180-4

£18.63 · 86% less

Fs49 Hz −4%

Qts0.42 +8%

Vas16.5 L +4%

BL6.5 T·m −10%

Xmax4 mm −11%

Sensitivity88.1 dB −0.9

HiViM6N

£20.85 · 84% less

Fs46 Hz −9%

Qts0.39 –

Vas21.9 L +38%

BL7.8 T·m +8%

Xmax4.3 mm −4%

Sensitivity89.1 dB –

Dayton AudioSIG180-4

£40.97 · 68% less

Fs41 Hz −20%

Qts0.38 –

Vas23.2 L +46%

BL6.6 T·m −8%

Xmax5 mm +11%

Sensitivity87.8 dB −1.2

HiViF6

£41.75 · 68% less

Fs45 Hz −11%

Qts0.35 −10%

Vas16.4 L +3%

BL9 T·m +25%

Xmax4.3 mm −4%

Sensitivity88 dB −1

CIAREHW161N

£43.46 · 66% less

Fs47 Hz −7%

Qts0.37 −5%

Vas19.9 L +25%

BL7.4 T·m –

Xmax5 mm +11%

Sensitivity88.6 dB –

Dayton AudioRS150P-4A

£44.70 · 65% less

Fs44 Hz −14%

Qts0.34 −13%

Vas15.7 L –

BL4.4 T·m −39%

Xmax4.4 mm –

Sensitivity87 dB −2

Scanspeak18W/8434G00

£57.57 · 56% less

Fs50 Hz –

Qts0.43 +10%

Vas19.5 L +23%

BL7.2 T·m –

Xmax4.2 mm −7%

Sensitivity89.3 dB –

CIAREHW172

£62.68 · 52% less

Fs46 Hz −9%

Qts0.37 −5%

Vas20 L +26%

BL7.6 T·m +5%

Xmax4.5 mm –

Sensitivity88.4 dB −0.6

CIAREHWB160

£65.19 · 50% less

Fs43 Hz −15%

Qts0.37 −5%

Vas28 L +76%

BL7.3 T·m –

Xmax4.5 mm –

Sensitivity89.4 dB –

Sica5.5 H 1.5 CP

£74.34 · 43% less

Fs48 Hz −6%

Qts0.37 −5%

Vas8.4 L −47%

BL7.2 T·m –

Xmax4.5 mm –

Sensitivity85.7 dB −3.3

CIARECMI160ND

£128.55 · Same price

Fs73 Hz +44%

Qts0.41 +5%

Vas6 L −62%

BL7.8 T·m +8%

Xmax4.5 mm –

Sensitivity89.2 dB –

RS SpeakersMW 174.38 FIBONACCI

£145.42 · 12% more

Fs46 Hz −10%

Qts0.39 –

Vas18.7 L +18%

BL7.0 T·m –

Xmax4.5 mm –

Sensitivity88.3 dB −0.7

WavecorWF152BD12

£149.60 · 16% more

Fs46 Hz −9%

Qts0.38 –

Vas9.6 L −40%

BL7.2 T·m –

Xmax4.5 mm –

Sensitivity85.7 dB −3.3

Scanspeak15W/8531K00

£150.70 · 16% more

Fs39 Hz −23%

Qts0.38 –

Vas16.7 L +5%

BL6.6 T·m −8%

Xmax6.5 mm +44%

Sensitivity85.8 dB −3.2

Scanspeak15W/8530K00

£157.03 · 21% more

Fs39 Hz −23%

Qts0.39 –

Vas16 L –

BL6.6 T·m −8%

Xmax6.5 mm +44%

Sensitivity85.5 dB −3.5

AccutonC168-6-890

£919.31 · 610% more

Fs41 Hz −19%

Qts0.44 +13%

Vas15 L −6%

BL7.5 T·m +4%

Xmax5 mm +11%

Sensitivity85.3 dB −3.7

WavecorWF152BD11

No current price

Fs53 Hz +4%

Qts0.40 –

Vas8.6 L −46%

BL7.2 T·m –

Xmax4.5 mm –

Sensitivity86.9 dB −2.1

Tang BandW6-2313

No current price

Fs50 Hz –

Qts0.40 –

Vas13.3 L −16%

BL7.1 T·m –

Xmax4 mm −11%

Sensitivity87.8 dB −1.2

HiViF6N

No current price

Fs48 Hz −6%

Qts0.43 +10%

Vas19.1 L +20%

BL7.3 T·m –

Xmax4.5 mm –

Sensitivity88.7 dB –

WavecorWF152BD07

No current price

Fs52 Hz –

Qts0.39 –

Vas9.2 L −42%

BL8 T·m +11%

Xmax4.5 mm –

Sensitivity86.9 dB −2.1

WavecorWF152BD15

No current price

Fs52 Hz –

Qts0.39 –

Vas9.2 L −42%

BL8 T·m +11%

Xmax4.5 mm –

Sensitivity86.9 dB −2.1

HiViD6.4+

No current price

Fs44 Hz −13%

Qts0.36 −8%

Vas13.9 L −13%

BL6.6 T·m −9%

Xmax4 mm −11%

Sensitivity86.5 dB −2.5

CIARECMI160

No current price

Fs70 Hz +38%

Qts0.41 +5%

Vas7.8 L −51%

BL7.2 T·m –

Xmax4.5 mm –

Sensitivity89.8 dB +0.8

HiViE6.5N

No current price

Fs43 Hz −15%

Qts0.40 –

Vas21 L +32%

BL7.1 T·m –

Xmax4.3 mm −6%

Sensitivity87.2 dB −1.8

CIARECW161N

No current price

Fs52 Hz –

Qts0.35 −10%

Vas17.4 L +9%

BL6.1 T·m −16%

Xmax4 mm −11%

Sensitivity89.7 dB +0.7

HiViD6.8+

No current price

Fs44 Hz −13%

Qts0.36 −8%

Vas14.4 L −9%

BL9.0 T·m +24%

Xmax4 mm −11%

Sensitivity86.7 dB −2.3

WavecorWF152BD08

No current price

Fs46 Hz −9%

Qts0.35 −10%

Vas11.5 L −28%

BL8 T·m +11%

Xmax4.5 mm –

Sensitivity87 dB −2

WavecorWF152BD16

No current price

Fs46 Hz −9%

Qts0.35 −10%

Vas11.5 L −28%

BL8 T·m +11%

Xmax4.5 mm –

Sensitivity87 dB −2

HiViSS6N

No current price

Fs44 Hz −13%

Qts0.36 −8%

Vas23.9 L +50%

BL7.6 T·m +5%

Xmax4.3 mm −4%

Sensitivity89.1 dB –

KartesianWOM155_VKI-C

No current price

Fs38 Hz −25%

Qts0.37 −5%

Vas17.9 L +13%

BL7.1 T·m –

Xmax10 mm +122%

Sensitivity86 dB −3

Search similar

Tune the match

Choose the published values that matter to your design. Size stays matched to this driver.

Qts

Qes

Vas

Xmax

Where to buy

Prices for delivery to the UK, including VAT. How prices work

Watch price

Shop	Price	Against the lowest	Stock	Link
SoundImports Checked 4 Nov 2026 · Ships from Netherlands · Source: inc VAT Import VAT and duty may apply	£129.50, the lowest price		2 in stock	Visit shop at SoundImports

Best price over time

Tracked since 4 Nov