DRIVE UNITS BY MANUFACTURER:
SPH-175HQ
Categories: 6-8 inch Bass / Midrange Speakers Monacor Drive Units
The Monacor SPH-175HQ is a 6.5 inch midwoofer with a distinctly classic feel about it. Features include a hand treated pulp / paper cone, a low loss rubber surround, a fully ventilated diecast chassis and a powerful 90mm ferrite magnet system.
This high quality loudspeaker is ideally suited to bass reflex designs. The damped pulp cone gives a smooth warm feel to the sound, the frequency response is extended and without major breakups. A very nice 'old school' style drive unit that will appeal to many listeners.
Resonant frequency (fs) | 39 Hz | Nominal impedance (Zn) | 8 Ω |
Mechanical Q factor (Qms) | 2.57 |
DC resistance (Re) | 6.5 Ω |
Electrical Q factor (Qes) | 0.50 | Max power handling | 120W |
Total Q factor (Qts) | 0.42 | Sensitivity (2.83V/1m) | 89 dB |
Equivalent volume (Vas) | 33L | Chassis diameter |
175 mm |
SPH170HQ
Friendly technical support
40+ years in the trade
UK family run business
Excellent customer service
Quick dispatch
Been looking for a supplier of replacement drivers for some years.
Willy's HiFi had just the parts at a good price and they arrived in a couple of days.
Excellent service. Even a personal thank you hand written on the invoice.
A quick delivery and the tweeters are perfect on my mission 753 freedom speakers. Easy to fit . Highly recommend.
I’m no expert when it comes to speakers, but after some research (and a strong recommendation from ChatGPT), I went with the SB Acoustics SB65WBAC25-4 as a reference full-range speaker in this size range.
Having now tested them, I can confidently say they’re probably the best speakers I’ve ever owned. The clarity is outstanding—every detail comes through with incredible precision. The bass is surprisingly full and punchy for a speaker this size, and they handle power impressively well. For anyone looking for a high-performance compact full-range driver, these are hard to beat.
Item as described and arrived quickly - and did the job. However, I suggested that anyone replacing speaker foam makes sure they have a very large pair of sharp dressmaking scissors as it was not easy cutting to size without producing a ragged edge (which I managed to hide short of a close inspection)!