5.25-inch LF driver · PTT series · 39 mm voice coil · 80 W

Purifi PTT5.25X04-NFA-01 4Ω

Name: Purifi PTT5.25X04-NFA-01 4 Ohm
Brand: Purifi
SKU: PTT5.25X04-NFA-01

4 Ω

No price for delivery to the UK

All 1 offer

Open in 00 Simulator

Fs: 29Hz
Xmax: 9.8mm
SPL: 83dB
Pe: 80W
BL: 7.9T·m
Vd: 83cm³
Qts: 0.24
Vas: 13L

See all 28 specs

Specifications

Published by Purifi

Manufacturer page

Datasheet PDF

Purifi PTT5.25X04-NFA-01 is a 5.25-inch 4 ohm LF driver rated at 80 W RMS. The validated T/S data includes Fs 29 Hz, Qts 0.24, Vas 13 L, Xmax 9.8 mm, sensitivity 83.1 dB, plus 83 cm³ Vd and 116 EBP. bits tracks vendor pricing, datasheet links, simulator import data, and similar drivers from the same loudspeaker database.

The published T/S values agree with each other

Thiele/Small

Fs: 29Hz
Qts: 0.24
Qes: 0.25
Qms: 6.5
Vas: 13L
Re: 3.6Ω
Le: 0.39mH

Motor and cone

BL: 7.9T·m
Sd: 85cm²
Mms: 23g
Xmax: 9.8mm
Vd †: 83cm³
Voice coil: 39mm

Power and response

Sensitivity †: 83.1dB
Manufacturer sensitivity: 85.6dB
Power: 80W
Impedance: 4Ω
Min. impedance: 4.3Ω
EBP †: 116 · Leans vented

Size and mounting

Diameter: 147mm
Cutout: 121mm
Bolt circle: 138mm
Weight: 1.8kg

Other published values

Cms: 1.27mm/N
Rms: 0.66kg/s
Xmech: 14
Power Peak: 250

Other dimensions

Mounting Depth: 75

Sensitivity shows 83.1 dB, calculated from the T/S values. Purifi publishes 85.6 dB, 2.5 dB apart.

† Calculated by bits from the published values

What this validation status means

Everything else Purifi lists

LF · Primary · 5.25″

BL: 7.9T·m
Fs: 29Hz
Le: 0.39mH
Re: 3.6Ω
Sd: 85cm²
Cms: 1.27mm/N
Mms: 23g
Qes: 0.25
Qms: 6.5
Qts: 0.24
Rms: 0.66kg/s
SPL: 83.1dB
Vas: 13L
Xmax: 9.8mm
Xmech: 14
Power: 80W
Impedance: 4Ω
Power Peak: 250
Sensitivity: 85.6dB
Calculated sensitivity †: 83.1dB
Manufacturer sensitivity: 85.6dB
Min. impedance: 4.3Ω
Voice coil: 39mm
Weight: 1.8kg
Diameter: 147mm
Mounting Depth: 75
Cutout: 121mm
Bolt circle: 138mm

Compare

Same-size drivers, compared with the PTT5.25X04-NFA-01. Clear differences are green when better and red when worse.

This driverPTT5.25X04-NFA-01

Best price

–

29 Hz

Qts

0.24

Vas

13 L

7.9 T·m

Xmax

9.8 mm

Sensitivity

83.1 dB

Power

80 W

SB AcousticsSB13PFCR25-4-COAX

£44.29

Fs43 Hz +48%

Qts0.27 +13%

Vas14.4 L +11%

BL5.1 T·m −35%

Xmax4.7 mm −53%

Sensitivity87.8 dB +4.7

Scanspeak15W/8424G00

£49.40

Fs46 Hz +59%

Qts0.25 +4%

Vas14.5 L +12%

BL6.6 T·m −16%

Xmax2.6 mm −73%

Sensitivity89.2 dB +6.1

Scanspeak15W/4424G00

£53.55

Fs46 Hz +59%

Qts0.24 –

Vas13.8 L +6%

BL5.2 T·m −34%

Xmax2.8 mm −71%

Sensitivity89.2 dB +6.1

Scanspeak15W/8434G00

£56.10

Fs45 Hz +55%

Qts0.25 +4%

Vas12.8 L –

BL7.3 T·m −8%

Xmax4.2 mm −57%

Sensitivity88.4 dB +5.3

Scanspeak15W/4434G00

£58.57

Fs43 Hz +48%

Qts0.21 −13%

Vas12.8 L –

BL5.9 T·m −25%

Xmax4.3 mm −56%

Sensitivity88.7 dB +5.6

SB AcousticsSB17NRX2L35-4

£59.85

Fs41 Hz +41%

Qts0.25 +4%

Vas21.9 L +68%

BL6.5 T·m −18%

Xmax4.8 mm −51%

Sensitivity89.7 dB +6.6

CIAREHWB130

£61.12

Fs46 Hz +59%

Qts0.28 +17%

Vas12.5 L −4%

BL5.6 T·m −29%

Xmax4.5 mm −54%

Sensitivity88.3 dB +5.2

SEASH1262-08 MCA15RCY

£89.46

Fs51 Hz +76%

Qts0.25 +4%

Vas12 L −8%

BL6.8 T·m −14%

Xmax1.7 mm −83%

Sensitivity89.3 dB +6.2

Tang BandW6-1139SIF

£96.29

Fs35 Hz +21%

Qts0.40 +67%

Vas11.8 L −9%

BL8.5 T·m +7%

Xmax11.5 mm +17%

Sensitivity82.3 dB −0.8

SB AcousticsMR13P-4

£115.00

Fs41 Hz +41%

Qts0.23 −4%

Vas19.4 L +49%

BL4.3 T·m −46%

Xmax3 mm −69%

Sensitivity89.3 dB +6.2

SB AcousticsMR13PNW-4

£115.00

Fs41 Hz +41%

Qts0.23 −4%

Vas19.4 L +49%

BL4.3 T·m −46%

Xmax3 mm −69%

Sensitivity89.3 dB +6.2

B&C5FCX44

£129.00

Fs61 Hz +110%

Qts0.25 +4%

Vas7 L −46%

BL10.5 T·m +33%

Xmax5 mm −49%

Sensitivity90.1 dB +7

SB AcousticsMW13P-4

£139.69

Fs41 Hz +41%

Qts0.27 +13%

Vas14.6 L +12%

BL4.9 T·m −38%

Xmax5 mm −49%

Sensitivity87.4 dB +4.3

SB AcousticsMW13PNW-4

£139.69

Fs41 Hz +41%

Qts0.27 +13%

Vas14.6 L +12%

BL4.9 T·m −38%

Xmax5 mm −49%

Sensitivity87.4 dB +4.3

Scanspeak15M/4531K00

£150.70

Fs42 Hz +45%

Qts0.27 +13%

Vas16 L +23%

BL6 T·m −24%

Xmax3 mm −69%

Sensitivity88.3 dB +5.2

Beyma5CX200ND

£220.02

Fs75 Hz +159%

Qts0.28 +17%

Vas9.1 L −30%

BL7.3 T·m −7%

Xmax5.7 mm −42%

Sensitivity93.4 dB +10.3

SB AcousticsMW13TX-4

£225.24

Fs38 Hz +31%

Qts0.26 +8%

Vas16 L +23%

BL5 T·m −37%

Xmax5 mm −49%

Sensitivity87.2 dB +4.1

SB AcousticsMR13TX-4

£251.15

Fs44 Hz +52%

Qts0.27 +13%

Vas12.2 L −6%

BL4.9 T·m −38%

Xmax3 mm −69%

Sensitivity87.7 dB +4.6

Scanspeak15WU/4741T00

£261.31

Fs34 Hz +17%

Qts0.23 −4%

Vas20 L +54%

BL6 T·m −24%

Xmax9 mm −8%

Sensitivity87 dB +3.9

Scanspeak12MU/4731T00

£267.60

Fs64 Hz +121%

Qts0.24 –

Vas5.4 L −58%

BL5.1 T·m −35%

Xmax3.5 mm −64%

Sensitivity89.4 dB +6.3

Scanspeak15WU/8741T00

£301.39

Fs35 Hz +21%

Qts0.26 +8%

Vas19.9 L +53%

BL7.5 T·m −5%

Xmax9 mm −8%

Sensitivity86.9 dB +3.8

PurifiPTT5.25X08-NFA-01

£334.88

Fs32 Hz +10%

Qts0.27 +13%

Vas13.2 L –

BL9 T·m +14%

Xmax9.8 mm –

Sensitivity83.9 dB +0.8

PurifiPTT5.25X08-NAA-05

£334.88

Fs30 Hz +3%

Qts0.30 +25%

Vas12.4 L −5%

BL9.1 T·m +15%

Xmax9.8 mm –

Sensitivity82.2 dB −0.9

PurifiPTT5.25X04-NAA-05

No current price

Fs29 Hz –

Qts0.27 +13%

Vas11.8 L −9%

BL7.9 T·m –

Xmax9.8 mm –

Sensitivity82.1 dB −1

PurifiPTT5.25M04-NAA-05

No current price

Fs39 Hz +34%

Qts0.24 –

Vas9.9 L −24%

BL8.1 T·m –

Xmax2.9 mm −70%

Sensitivity85.7 dB +2.6

Tang BandW6-1559S

No current price

Fs45 Hz +55%

Qts0.24 –

Vas13.3 L –

BL13.7 T·m +74%

Xmax5.5 mm −44%

Sensitivity88.9 dB +5.8

KartesianWOM155_VKI-C

No current price

Fs38 Hz +31%

Qts0.37 +54%

Vas17.9 L +38%

BL7.1 T·m −10%

Xmax10 mm –

Sensitivity86 dB +2.9

WavecorWF152BD06

No current price

Fs45 Hz +53%

Qts0.29 +21%

Vas11.5 L −12%

BL6.3 T·m −20%

Xmax4.5 mm −54%

Sensitivity87.3 dB +4.2

WavecorWF152BD14

No current price

Fs45 Hz +53%

Qts0.29 +21%

Vas11.5 L −12%

BL6.3 T·m −20%

Xmax4.5 mm −54%

Sensitivity87.3 dB +4.2

Sica6 CX 2 PL P

No current price

Fs85 Hz +193%

Qts0.24 –

Vas5.4 L −58%

BL12.8 T·m +62%

Xmax3.5 mm −64%

Sensitivity92.9 dB +9.8

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 26 Oct 2026 · Ships from Netherlands · Source: inc VAT Import VAT and duty may apply	£334.88		Back order	Visit shop at SoundImports

bits00 AUDIO

5.25-inch LF driver · PTT series · 39 mm voice coil · 80 W

Purifi PTT5.25X04-NFA-01 4Ω

4 Ω

No price for delivery to the UK

All 1 offer

Open in 00 Simulator

Fs: 29Hz
Xmax: 9.8mm
SPL: 83dB
Pe: 80W
BL: 7.9T·m
Vd: 83cm³
Qts: 0.24
Vas: 13L

See all 28 specs

Specifications

Published by Purifi

Manufacturer page

Datasheet PDF

The published T/S values agree with each other

Thiele/Small

Fs: 29Hz
Qts: 0.24
Qes: 0.25
Qms: 6.5
Vas: 13L
Re: 3.6Ω
Le: 0.39mH

Motor and cone

BL: 7.9T·m
Sd: 85cm²
Mms: 23g
Xmax: 9.8mm
Vd †: 83cm³
Voice coil: 39mm

Power and response

Sensitivity †: 83.1dB
Manufacturer sensitivity: 85.6dB
Power: 80W
Impedance: 4Ω
Min. impedance: 4.3Ω
EBP †: 116 · Leans vented

Size and mounting

Diameter: 147mm
Cutout: 121mm
Bolt circle: 138mm
Weight: 1.8kg

Other published values

Cms: 1.27mm/N
Rms: 0.66kg/s
Xmech: 14
Power Peak: 250

Other dimensions

Mounting Depth: 75

Sensitivity shows 83.1 dB, calculated from the T/S values. Purifi publishes 85.6 dB, 2.5 dB apart.

† Calculated by bits from the published values

What this validation status means

Everything else Purifi lists

LF · Primary · 5.25″

BL: 7.9T·m
Fs: 29Hz
Le: 0.39mH
Re: 3.6Ω
Sd: 85cm²
Cms: 1.27mm/N
Mms: 23g
Qes: 0.25
Qms: 6.5
Qts: 0.24
Rms: 0.66kg/s
SPL: 83.1dB
Vas: 13L
Xmax: 9.8mm
Xmech: 14
Power: 80W
Impedance: 4Ω
Power Peak: 250
Sensitivity: 85.6dB
Calculated sensitivity †: 83.1dB
Manufacturer sensitivity: 85.6dB
Min. impedance: 4.3Ω
Voice coil: 39mm
Weight: 1.8kg
Diameter: 147mm
Mounting Depth: 75
Cutout: 121mm
Bolt circle: 138mm

Compare

Same-size drivers, compared with the PTT5.25X04-NFA-01. Clear differences are green when better and red when worse.

This driverPTT5.25X04-NFA-01

Best price

–

29 Hz

Qts

0.24

Vas

13 L

7.9 T·m

Xmax

9.8 mm

Sensitivity

83.1 dB

Power

80 W

SB AcousticsSB13PFCR25-4-COAX

£44.29

Fs43 Hz +48%

Qts0.27 +13%

Vas14.4 L +11%

BL5.1 T·m −35%

Xmax4.7 mm −53%

Sensitivity87.8 dB +4.7

Scanspeak15W/8424G00

£49.40

Fs46 Hz +59%

Qts0.25 +4%

Vas14.5 L +12%

BL6.6 T·m −16%

Xmax2.6 mm −73%

Sensitivity89.2 dB +6.1

Scanspeak15W/4424G00

£53.55

Fs46 Hz +59%

Qts0.24 –

Vas13.8 L +6%

BL5.2 T·m −34%

Xmax2.8 mm −71%

Sensitivity89.2 dB +6.1

Scanspeak15W/8434G00

£56.10

Fs45 Hz +55%

Qts0.25 +4%

Vas12.8 L –

BL7.3 T·m −8%

Xmax4.2 mm −57%

Sensitivity88.4 dB +5.3

Scanspeak15W/4434G00

£58.57

Fs43 Hz +48%

Qts0.21 −13%

Vas12.8 L –

BL5.9 T·m −25%

Xmax4.3 mm −56%

Sensitivity88.7 dB +5.6

SB AcousticsSB17NRX2L35-4

£59.85

Fs41 Hz +41%

Qts0.25 +4%

Vas21.9 L +68%

BL6.5 T·m −18%

Xmax4.8 mm −51%

Sensitivity89.7 dB +6.6

CIAREHWB130

£61.12

Fs46 Hz +59%

Qts0.28 +17%

Vas12.5 L −4%

BL5.6 T·m −29%

Xmax4.5 mm −54%

Sensitivity88.3 dB +5.2

SEASH1262-08 MCA15RCY

£89.46

Fs51 Hz +76%

Qts0.25 +4%

Vas12 L −8%

BL6.8 T·m −14%

Xmax1.7 mm −83%

Sensitivity89.3 dB +6.2

Tang BandW6-1139SIF

£96.29

Fs35 Hz +21%

Qts0.40 +67%

Vas11.8 L −9%

BL8.5 T·m +7%

Xmax11.5 mm +17%

Sensitivity82.3 dB −0.8

SB AcousticsMR13P-4

£115.00

Fs41 Hz +41%

Qts0.23 −4%

Vas19.4 L +49%

BL4.3 T·m −46%

Xmax3 mm −69%

Sensitivity89.3 dB +6.2

SB AcousticsMR13PNW-4

£115.00

Fs41 Hz +41%

Qts0.23 −4%

Vas19.4 L +49%

BL4.3 T·m −46%

Xmax3 mm −69%

Sensitivity89.3 dB +6.2

B&C5FCX44

£129.00

Fs61 Hz +110%

Qts0.25 +4%

Vas7 L −46%

BL10.5 T·m +33%

Xmax5 mm −49%

Sensitivity90.1 dB +7

SB AcousticsMW13P-4

£139.69

Fs41 Hz +41%

Qts0.27 +13%

Vas14.6 L +12%

BL4.9 T·m −38%

Xmax5 mm −49%

Sensitivity87.4 dB +4.3

SB AcousticsMW13PNW-4

£139.69

Fs41 Hz +41%

Qts0.27 +13%

Vas14.6 L +12%

BL4.9 T·m −38%

Xmax5 mm −49%

Sensitivity87.4 dB +4.3

Scanspeak15M/4531K00

£150.70

Fs42 Hz +45%

Qts0.27 +13%

Vas16 L +23%

BL6 T·m −24%

Xmax3 mm −69%

Sensitivity88.3 dB +5.2

Beyma5CX200ND

£220.02

Fs75 Hz +159%

Qts0.28 +17%

Vas9.1 L −30%

BL7.3 T·m −7%

Xmax5.7 mm −42%

Sensitivity93.4 dB +10.3

SB AcousticsMW13TX-4

£225.24

Fs38 Hz +31%

Qts0.26 +8%

Vas16 L +23%

BL5 T·m −37%

Xmax5 mm −49%

Sensitivity87.2 dB +4.1

SB AcousticsMR13TX-4

£251.15

Fs44 Hz +52%

Qts0.27 +13%

Vas12.2 L −6%

BL4.9 T·m −38%

Xmax3 mm −69%

Sensitivity87.7 dB +4.6

Scanspeak15WU/4741T00

£261.31

Fs34 Hz +17%

Qts0.23 −4%

Vas20 L +54%

BL6 T·m −24%

Xmax9 mm −8%

Sensitivity87 dB +3.9

Scanspeak12MU/4731T00

£267.60

Fs64 Hz +121%

Qts0.24 –

Vas5.4 L −58%

BL5.1 T·m −35%

Xmax3.5 mm −64%

Sensitivity89.4 dB +6.3

Scanspeak15WU/8741T00

£301.39

Fs35 Hz +21%

Qts0.26 +8%

Vas19.9 L +53%

BL7.5 T·m −5%

Xmax9 mm −8%

Sensitivity86.9 dB +3.8

PurifiPTT5.25X08-NFA-01

£334.88

Fs32 Hz +10%

Qts0.27 +13%

Vas13.2 L –

BL9 T·m +14%

Xmax9.8 mm –

Sensitivity83.9 dB +0.8

PurifiPTT5.25X08-NAA-05

£334.88

Fs30 Hz +3%

Qts0.30 +25%

Vas12.4 L −5%

BL9.1 T·m +15%

Xmax9.8 mm –

Sensitivity82.2 dB −0.9

PurifiPTT5.25X04-NAA-05

No current price

Fs29 Hz –

Qts0.27 +13%

Vas11.8 L −9%

BL7.9 T·m –

Xmax9.8 mm –

Sensitivity82.1 dB −1

PurifiPTT5.25M04-NAA-05

No current price

Fs39 Hz +34%

Qts0.24 –

Vas9.9 L −24%

BL8.1 T·m –

Xmax2.9 mm −70%

Sensitivity85.7 dB +2.6

Tang BandW6-1559S

No current price

Fs45 Hz +55%

Qts0.24 –

Vas13.3 L –

BL13.7 T·m +74%

Xmax5.5 mm −44%

Sensitivity88.9 dB +5.8

KartesianWOM155_VKI-C

No current price

Fs38 Hz +31%

Qts0.37 +54%

Vas17.9 L +38%

BL7.1 T·m −10%

Xmax10 mm –

Sensitivity86 dB +2.9

WavecorWF152BD06

No current price

Fs45 Hz +53%

Qts0.29 +21%

Vas11.5 L −12%

BL6.3 T·m −20%

Xmax4.5 mm −54%

Sensitivity87.3 dB +4.2

WavecorWF152BD14

No current price

Fs45 Hz +53%

Qts0.29 +21%

Vas11.5 L −12%

BL6.3 T·m −20%

Xmax4.5 mm −54%

Sensitivity87.3 dB +4.2

Sica6 CX 2 PL P

No current price

Fs85 Hz +193%

Qts0.24 –

Vas5.4 L −58%

BL12.8 T·m +62%

Xmax3.5 mm −64%

Sensitivity92.9 dB +9.8

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 26 Oct 2026 · Ships from Netherlands · Source: inc VAT Import VAT and duty may apply	£334.88		Back order	Visit shop at SoundImports