SB AcousticsSB16PFCR25-8
£24.29 · 65% less, betterFs38 Hz –
Qts0.40 −5%
Vas27 L −18%, better
BL6.2 T·m −3%
Xmax4.5 mm −18%, worse
Sensitivity86.9 dB −1.1
6.5-inch LF driver · SPH series · 25 mm voice coil · 70 W
Monacor SPH-175HQ 8Ω
8 Ω · 3–4000 Hz
£68.69
17%LTT · Ships from Germany · All 4 offers
- Fs
- 39Hz
- Xmax
- 5.5mm
- SPL
- 88dB
- Pe
- 70W
- BL
- 6.4T·m
- Vd
- 77cm³
- Qts
- 0.42
- Vas
- 33L
Monacor SPH-175HQ is a 6.5-inch 8 ohm LF driver rated at 70 W RMS. The validated T/S data includes Fs 39 Hz, Qts 0.42, Vas 33 L, Xmax 5.5 mm, sensitivity 88 dB, plus 77 cm³ Vd and 78 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 £68.69.
The published T/S values agree with each other
Thiele/Small
- Fs
- 39Hz
- Qts
- 0.42
- Qes
- 0.50
- Qms
- 2.6
- Vas
- 33L
- Re
- 6.5Ω
- Le
- 0.71mH
Motor and cone
- BL
- 6.4T·m
- Sd
- 140cm²
- Mms
- 14g
- Xmax
- 5.5mm
- Vd †
- 77cm³
- Voice coil
- 25mm
Power and response
- Sensitivity †
- 88dB
- Manufacturer sensitivity
- 89dB
- Power
- 70W
- Impedance
- 8Ω
- Range
- 3–4000Hz
- EBP †
- 78 · Sealed or vented
Size and mounting
- Diameter
- 175mm
- Cutout
- 152mm
- Depth
- 79mm
- Weight
- 1.3kg
Other published values
- Cms
- 1.20mm/N
- Power Peak
- 120
Other dimensions
- Mounting Depth
- 73
Sensitivity shows 88.0 dB, calculated from the T/S values. Monacor publishes 89.0 dB, 1.0 dB apart.
† Calculated by bits from the published values
What this validation status means
Everything else Monacor lists
MF · Primary · 6.5″
- BL
- 6.4T·m
- Fs
- 39Hz
- Le
- 0.71mH
- Re
- 6.5Ω
- Sd
- 140cm²
- Cms
- 1.20mm/N
- Mms
- 14g
- Qes
- 0.50
- Qms
- 2.6
- Qts
- 0.42
- SPL
- 88dB
- Vas
- 33L
- Xmax
- 5.5mm
- Power
- 70W
- Impedance
- 8Ω
- Power Peak
- 120
- Sensitivity
- 89dB
- Low limit
- 3Hz
- Calculated sensitivity †
- 88dB
- High limit
- 4000Hz
- Manufacturer sensitivity
- 89dB
- Voice coil
- 25mm
- Weight
- 1.3kg
- Diameter
- 175mm
- Depth
- 79mm
- Mounting Depth
- 73
- Cutout
- 152mm
02
Compare
Same-size drivers, compared with the SPH-175HQ. Clear differences are green when better and red when worse.
This driverSPH-175HQ
Best price
£68.69
Fs
39 Hz
Qts
0.42
Vas
33 L
BL
6.4 T·m
Xmax
5.5 mm
Sensitivity
88 dB
Power
70 W
PeerlessSDS-P830657
£25.09 · 63% less, betterFs48 Hz +23%, worse
Qts0.47 +12%, worse
Vas20.1 L −39%, better
BL6.9 T·m +8%
Xmax5.5 mm –
Sensitivity88 dB –
SB AcousticsSB16PFC25-8
£27.09 · 61% less, betterFs38 Hz –
Qts0.40 −5%
Vas27 L −18%, better
BL6.2 T·m −3%
Xmax4.5 mm −18%, worse
Sensitivity86.9 dB −1.1
REDCATT61FHM-1
£39.88 · 42% less, betterFs37 Hz −5%
Qts0.49 +17%, worse
Vas28.2 L −15%, better
BL6.6 T·m +3%
Xmax6.3 mm +15%, better
Sensitivity86.4 dB −1.6
Dayton AudioSIG180-4
£41.10 · 40% less, betterFs41 Hz +4%
Qts0.38 −10%
Vas23.2 L −30%, better
BL6.6 T·m +3%
Xmax5 mm −9%
Sensitivity87.8 dB –
SB AcousticsSB17MFC35-8
£54.89 · 20% less, betterFs33 Hz −15%, better
Qts0.37 −12%, better
Vas39 L +18%, worse
BL5.9 T·m −8%
Xmax5.5 mm –
Sensitivity87.5 dB −0.5
SB AcousticsSB17NRX2C35-8
£55.41 · 19% less, betterFs37 Hz −6%
Qts0.42 –
Vas27 L −18%, better
BL6.3 T·m –
Xmax5.5 mm –
Sensitivity86.5 dB −1.5
Sica6.5 H 1.5 CP
£56.04 · 18% less, betterFs45 Hz +16%, worse
Qts0.42 –
Vas20.2 L −39%, better
BL7.0 T·m +10%
Xmax6 mm +9%
Sensitivity88.2 dB –
MonacorSPH-176
£58.80 · 14% less, betterFs39 Hz –
Qts0.37 −12%, better
Vas27 L −18%, better
BL7.7 T·m +20%, better
Xmax5.5 mm –
Sensitivity87.6 dB –
Dayton AudioRS180P-4
£59.79 · 13% less, betterFs38 Hz −3%
Qts0.39 −7%
Vas27.3 L −17%, better
BL4.7 T·m −27%, worse
Xmax6 mm +9%
Sensitivity86.9 dB −1.1
SB AcousticsSB17NAC35-8
£70.79 · 3% moreFs32 Hz −19%, better
Qts0.42 –
Vas33 L –
BL6.2 T·m −3%
Xmax5.5 mm –
Sensitivity85.6 dB −2.4, worse
Dayton AudioRS180S-8
£78.66 · 15% more, worseFs38 Hz −3%
Qts0.36 −14%, better
Vas23 L −30%, better
BL7.3 T·m +14%, better
Xmax6 mm +9%
Sensitivity86 dB −2, worse
SB AcousticsSB17CAC35-8
£87.92 · 28% more, worseFs28 Hz −28%, better
Qts0.36 −14%, better
Vas42 L +27%, worse
BL6.2 T·m −3%
Xmax5.5 mm –
Sensitivity85.7 dB −2.3, worse
SEASH1217-08 CA18RLY
£90.67 · 32% more, worseFs42 Hz +8%
Qts0.47 +12%, worse
Vas32 L −3%
BL5.6 T·m −13%, worse
Xmax5 mm −9%
Sensitivity88.3 dB –
WavecorWF182BD17
£121.86 · 77% more, worseFs33 Hz −15%, better
Qts0.35 −17%, better
Vas24.3 L −26%, better
BL6.5 T·m –
Xmax5.5 mm –
Sensitivity85.8 dB −2.2, worse
£125.68 · 83% more, worse
Fs43 Hz +10%, worse
Qts0.37 −12%, better
Vas22 L −33%, better
BL6.9 T·m +8%
Xmax6 mm +9%
Sensitivity87.9 dB –
Scanspeak15W/8534T00
£154.94 · 126% more, worseFs32 Hz −18%, better
Qts0.39 −7%
Vas30 L −9%
BL5.5 T·m −14%, worse
Xmax5 mm −9%
Sensitivity85.6 dB −2.4, worse
£376.94 · 449% more, worse
Fs34 Hz −13%, better
Qts0.42 –
Vas30 L −9%
BL6.6 T·m +3%
Xmax5 mm −9%
Sensitivity85.8 dB −2.2, worse
HiViS6.5
No current priceFs47 Hz +21%, worse
Qts0.42 –
Vas18.4 L −44%, better
BL6.4 T·m –
Xmax5.8 mm +5%
Sensitivity88.1 dB –
HiViSS6.5
No current priceFs42 Hz +8%
Qts0.39 −7%
Vas24.8 L −25%, better
BL6.4 T·m –
Xmax5.8 mm +5%
Sensitivity88.1 dB –
Tang BandW6-658I
No current priceFs45 Hz +15%, worse
Qts0.44 +5%
Vas28.3 L −14%, better
BL6.3 T·m –
Xmax4.1 mm −25%, worse
Sensitivity89.2 dB +1.2
HiViSS6.5R
No current priceFs42 Hz +8%
Qts0.39 −7%
Vas21.6 L −35%, better
BL6.5 T·m –
Xmax5.8 mm +5%
Sensitivity87.7 dB –
HiViS6.5R
No current priceFs41 Hz +5%
Qts0.38 −10%
Vas23.2 L −30%, better
BL6.5 T·m –
Xmax5.8 mm +5%
Sensitivity87.8 dB –
WavecorWF182BD11
No current priceFs34 Hz −13%, better
Qts0.42 –
Vas24.3 L −26%, better
BL8.2 T·m +28%, better
Xmax5.5 mm –
Sensitivity85.4 dB −2.6, worse
WavecorWF182BD19
No current priceFs34 Hz −13%, better
Qts0.42 –
Vas24.3 L −26%, better
BL8.2 T·m +28%, better
Xmax5.5 mm –
Sensitivity85.4 dB −2.6, worse
Tang BandW6-623I
No current priceFs46 Hz +18%, worse
Qts0.41 –
Vas29.8 L −10%
BL6.7 T·m +5%
Xmax4 mm −27%, worse
Sensitivity90.1 dB +2.1, better
Supravox165 GMF
No current priceFs70 Hz +79%, worse
Qts0.39 −7%
Vas40 L +21%, worse
BL5.6 T·m −13%, worse
Xmax6 mm +9%
Sensitivity97.2 dB +9.2, better
WavecorWF182BD09
No current priceFs33 Hz −15%, better
Qts0.35 −17%, better
Vas24.3 L −26%, better
BL6.5 T·m –
Xmax5.5 mm –
Sensitivity85.8 dB −2.2, worse
SB AcousticsMW16PF-8
No current priceFs29 Hz −26%, better
Qts0.38 −10%
Vas48.4 L +47%, worse
BL5.8 T·m −9%
Xmax5.5 mm –
Sensitivity86.5 dB −1.5
RS SpeakersW 140.38 FIBONACCI
No current priceFs47 Hz +19%, worse
Qts0.41 –
Vas7.4 L −78%, better
BL6.8 T·m +6%
Xmax5 mm −9%
Sensitivity84.2 dB −3.8, worse
Tune the match
Choose the published values that matter to your design. Size stays matched to this driver.
Qts
Qes
VasL
Xmaxmm
BLTm
| Shop | Price | Against the lowest | Stock | Link |
|---|---|---|---|---|
LTT Import VAT and duty may apply | £68.69, the lowest price | Stock not listed | Visit shop at LTT | |
Willys-Hifi Not currently listed · Last seen 6 Aug 2026 | £80.95 | 18% above the lowest price | Stock not listed | Visit shop at Willys-Hifi |
Wilmslow Audio Not currently listed · Last seen 12 Aug 2026 | £90.00 | 31% above the lowest price | Stock not listed | Visit shop at Wilmslow Audio |
Audiophonics Import VAT and duty may apply | £83.19 | 21% above the lowest price | Available on order | Visit shop at Audiophonics |
Best price over time
Tracked since 27 Sep