Decca Corner Horn 'Voigt' Speakers Cw Lowther PM7A's
- 1900.00 £
- Published date: February 20, 2025
-
- Billinghurst, West Sussex, United Kingdom
Decca Corner Horn 'Voigt' Speakers Cw Lowther PM7A's
⭕ A unique opportunity to purchase these ultra-rare (circa. 1955) Decca Domestic Corner Horn Speakers (serial nos.22.. and 24..) loaded with very early Metal PlaquePM7As (serial nos.22.. and 22..).The enclosures are in superb condition (especially considering they are over 55 years old) and have the original piano-laquer finish.They sound and look simply awesome.
The Lowther PM7As (with almost consecutive serial nos.) possess massively high-gauss,pure Alnico, magnets.I have owned PM6As and PM2As but these sounded hard and a little compressed in comparison.As far as I am aware the PM7A was constructed using much higher quality magnet material(shared by the mighty PM4A)and therefore the PM7A is truly high-end in performance and quality.These particular drivers have been totally refurbished by way of addition of brand new Lowther manufactured:
Cones
Surrounds
Spiders
Baskets
Adaptors
Gaskets
Hardware (bolts,washers,etc)
All the above are genuine Lowtheritems and have consecutive serial numbers 13370 and 13371.The original Lowther packaging has been retained for completeness.These units (if looked after) will provide many,many years of listening pleasure.Since the service (carried out 17th May 2012) they have had less than one hours use and are not even run-in (suggest circa.40hrs use) and are quite literally plug and play.The magnets are totally original and work perfectly providing awesome dynamics,presence and startling realism.
Specification is as follows:
DC Resistance of Voice Coil Re 7.4 ohms
Free Air Resonance Fo 64.609 Hz
Emission Piston Area Sd 0.021
Equivalent Volume Suspension Vas 43.429 Ltrs
Suspension Compliance Cms 693.505 u M/N
Mass of Cone Mmd 7.0 g
Mass of Moving Parts Mms 8.75 g
Force Factor Bl 8.234 T-M
Mechanical Q Factor Qms 1.751
Electrical Q Factor Qes 0.338
Total Q Factor Qts 0.317
Voice Coil Inductance 1 kHz Le 102.389 uH
Reference Efficiency No 2.922%
Sound Pressure Level SPL 96.674 Db
The Lowther PM7As (with almost consecutive serial nos.) possess massively high-gauss,pure Alnico, magnets.I have owned PM6As and PM2As but these sounded hard and a little compressed in comparison.As far as I am aware the PM7A was constructed using much higher quality magnet material(shared by the mighty PM4A)and therefore the PM7A is truly high-end in performance and quality.These particular drivers have been totally refurbished by way of addition of brand new Lowther manufactured:
Cones
Surrounds
Spiders
Baskets
Adaptors
Gaskets
Hardware (bolts,washers,etc)
All the above are genuine Lowtheritems and have consecutive serial numbers 13370 and 13371.The original Lowther packaging has been retained for completeness.These units (if looked after) will provide many,many years of listening pleasure.Since the service (carried out 17th May 2012) they have had less than one hours use and are not even run-in (suggest circa.40hrs use) and are quite literally plug and play.The magnets are totally original and work perfectly providing awesome dynamics,presence and startling realism.
Specification is as follows:
DC Resistance of Voice Coil Re 7.4 ohms
Free Air Resonance Fo 64.609 Hz
Emission Piston Area Sd 0.021
Equivalent Volume Suspension Vas 43.429 Ltrs
Suspension Compliance Cms 693.505 u M/N
Mass of Cone Mmd 7.0 g
Mass of Moving Parts Mms 8.75 g
Force Factor Bl 8.234 T-M
Mechanical Q Factor Qms 1.751
Electrical Q Factor Qes 0.338
Total Q Factor Qts 0.317
Voice Coil Inductance 1 kHz Le 102.389 uH
Reference Efficiency No 2.922%
Sound Pressure Level SPL 96.674 Db
Phone number ✆ 07946 973992
Billinghurst, West Sussex
Related listings
-
Allen & Heath Xone V6 Rotary DJ Mixer + ...
ELECTRONICS Southwick (Northamptonshire) March 16, 2025 1.00 £ -
DMTech LM17DB TV/DVD Combo & DURABRAND D...
ELECTRONICS Shurdington (Gloucestershire) March 16, 2025 50.00 £ -
Meso Scale Discovery MSD Sector Micropla...
ELECTRONICS Altrincham (Manchester) March 16, 2025 2450.00 £
-
EMT 950 /347 BBC Broadcast Wide Body Tur...
ELECTRONICS Hinckley (Leicestershire) March 16, 2025 3500.00 £ -
-
-
VINTAGE WESTERN ELECTRIC 124C TUBE AMPLI...
ELECTRONICS Madeley (Staffordshire) March 16, 2025 2800.00 £ -
-
-
API Automated Precision Inc Intelliprobe...
ELECTRONICS Ampfield (Hampshire) March 16, 2025 2900.00 £ -
-
-
Sumitomo RDK-408A2 MRI Coldhead
ELECTRONICS Upton Upon Severn (Worcestershire) March 15, 2025 2650.00 £ -
-
Rogers LS3/5a 15 Ohm BBC Studio Monitors...
ELECTRONICS Waltham Abbey (Essex) March 15, 2025 1600.00 £
-
-
Accuphase C-2800 Precision Stereo Preamp...
ELECTRONICS Gillingham (Norfolk) March 15, 2025 2300.00 £ -
Marzhauser Scanning Stage For Olympus Mi...
ELECTRONICS Bourton On Hill (Gloucestershire) March 15, 2025 3000.00 £
-
-
-
SYNTHES ELECTRIC PEN DRIVE SYSTEM
ELECTRONICS Cirencester (Gloucestershire) March 15, 2025 2550.00 £
-
Jadis JA-80 Gold 25th Anniversary Limite...
ELECTRONICS Cramlington (Northumberland) March 15, 2025 2500.00 £ -
-
-
-
-
FLUKE 5820A With 2.1 GHz Bandwidth Exten...
ELECTRONICS Windlesham (Surrey) March 15, 2025 3300.00 £
-
-
-
Drain Jetter Towed Diesel Wrightway
ELECTRONICS Cheddon Fitzpain (Somerset) March 15, 2025 3000.00 £
-
FLUKE 5520A High Performance Multi Produ...
ELECTRONICS Lytham St Annes (Lancashire) March 15, 2025 3300.00 £ -
GERMAN NEUMANN GEFELL U-47 TUBE MICROFON...
ELECTRONICS Shanklin (Isle de Wight) March 15, 2025 4000.00 £ -
-
Bowers Wilkins 800 Diamond Speakers Pair
ELECTRONICS Sutton Coldfield (West Midlands) March 15, 2025 3500.00 £ -
-
Pass Labs XA-60.5 Class A Mono Amps Pair
ELECTRONICS Rudyard (Staffordshire) March 15, 2025 2900.00 £
-
-
-
Fidelity Research FR-66fx Tonearm WOBM
ELECTRONICS Kemble (Gloucestershire) March 15, 2025 1600.00 £
-
Sequential Circuits Prophet T8 Vintage A...
ELECTRONICS Rottingdean (East Sussex) March 15, 2025 1400.00 £ -
Esoteric Audio K-01 SACD CD Player
ELECTRONICS Broughton in Furness (Cumbria) March 15, 2025 2350.00 £ -
Continuum Ultimate Turntable Caliburn, C...
ELECTRONICS Tenbury Wells (Worcestershire) March 15, 2025 5200.00 £
-
PRISTINE PAIR VINTAGE WESTERN ELECTRIC 5...
ELECTRONICS Rock (Worcestershire) March 15, 2025 2100.00 £ -
-
-
Epilog Helix 60 Watt Engraver Engraving ...
ELECTRONICS Greenfield (Oxfordshire) March 15, 2025 2900.00 £ -
James B.Lansing D-1004 D1004 Pair Of Spe...
ELECTRONICS Maghull (Merseyside) March 15, 2025 2300.00 £ -
-
JBL 4344 Vintage Studio Monitor Loudspea...
ELECTRONICS Granby (Nottinghamshire) March 15, 2025 2200.00 £ -
-
-
BICOM 2000 4.4P BIORESONANCE THERAPY MAC...
ELECTRONICS Lisburn (Nothern Ireland) March 15, 2025 2500.00 £ -
-
TRANSPARENT CABLE REFERENCE MM BALANCE 1...
ELECTRONICS Norton St. Philip (Somerset) March 15, 2025 1500.00 £
-
Mark Levinson Madrigal 326s Stereo Pream...
ELECTRONICS Smallfield (Surrey) March 14, 2025 1300.00 £ -
-
-
Technics SL-1200LTD Gold - DDJ-SZ Gold -...
ELECTRONICS Daventry (Northamptonshire) March 14, 2025 3500.00 £ -
-
-
DEVIALET 250 INTEGRATED DIGITAL AMPLIFIE...
ELECTRONICS Hornsea (East Yorkshire) March 14, 2025 2800.00 £ -
-
Tannoy 12 Inch Silver York Corner Speake...
ELECTRONICS Salford (Oxfordshire) March 14, 2025 3300.00 £
-
Hi-END Acapella Audio Link Cable Rolls 1...
ELECTRONICS Thornton Hough (Merseyside) March 14, 2025 2600.00 £ -
-
-
-
-
Vintage 1987 Klipsch Klipschorn Horn Spe...
ELECTRONICS Heywood (Lancashire) March 14, 2025 1300.00 £
-
BRAND NEW LINN LP12-3/LINGO3/KORE/CIRKUS...
ELECTRONICS Burgess Hill (West Sussex) March 14, 2025 2100.00 £ -
-
(offers) LG 37 Full HD 1080p LCD Screen ...
ELECTRONICS Stone (Staffordshire) March 14, 2025 85.00 £
-
-
Iris 6mm 2 Meter Length Inspection Bores...
ELECTRONICS Coverack (Cornwall) March 14, 2025 1950.00 £ -
-
ULTRA RARE FM ACOUSTICS OF SWITZERLAND R...
ELECTRONICS Blackheath (London) March 14, 2025 3000.00 £ -
-
-
DALI IKON 6 AWARD WINNING 5.1 HOME CINEM...
ELECTRONICS Louth (Lincolnshire) March 14, 2025 1300.00 £ -
-
Marantz 7C Beautiful Condition Tubes Amp...
ELECTRONICS Hailsham (East Sussex) March 14, 2025 2200.00 £