Rare opportunity to own a set of Bowers and Wilkins DM7 collector's edition as pristine condition Giant speakers over 30kg

You simply won't find a better pair as in great shape all drivers are pristine

These are over 50 years old and in unbelievable condition a matching pair
Simply One of the Finest speakers for the money

These are very large as standing 36 inches in height
And weighing in At 30Kg

Satin black finish stunning


The Bowers & Wilkins DM7 is a landmark vintage loudspeaker introduced in 1977. It is historically significant as the first model to feature the "Tweeter-on-Top" design, where the high-frequency driver is physically separated from the main cabinet to reduce diffraction and improve imaging. 


Key Specifications & Design

The DM7 is a 2-way system that utilizes a third driver in the form of a passive radiator to enhance low-frequency performance. 



Tweeter: 1 x 26mm (1") TS26 polyester filament weave dome, mounted on top of the cabinet in a separate spheroidal housing.

Mid-Bass Driver: 1 x 160mm aromatic polyamide fibre (Kevlar-style) matrix cone.

Passive Radiator: 1 x ADR220 radiator to assist with bass response in a compact enclosure.

Sensitivity: Rated at 95dB (though real-world tests often suggest lower).

Frequency Response: 30Hz to 25kHz.

Impedance: 8 ohms nominal.

Enclosure: Approximately 40 litres, typically finished in teak, walnut, rosewood, or black ash


Historical Significance

Computer-Aided Design: The DM7 was the first B&W loudspeaker developed using the company's in-house computer modeling system.

Linear Phase: It was designed with a stepped baffle to ensure the drive units were vertically aligned for correct time delay and phase linearity.

Heritage: The design philosophy established with the DM7 directly influenced the legendary 801 series, which became a standard in recording studios. 


Here are the detailed technical specifications for the Bowers & Wilkins DM7 

Technical Specifications

Feature DM7 (Original)DM7 MKIISystem Type2-way, 3-driver system with passive radiator2-way, 3-driver system with passive radiatorTweeter (HF)1x 26mm TS26 polyester filament dome1x 26mm TS26 polyester filament domeMid-Bass (LF/MF)1x 160mm BM220 Kevlar matrix cone1x 160mm aromatic polyamide fibre conePassive Radiator1x ADR220 radiator1x ADR220 radiatorFrequency Response30Hz – 25kHz80Hz – 20kHz 



 2dB (free-field)Sensitivity95dB (10V RMS for 95dB SPL @ 1m)86dB (1W into 8



 for 86dB SPL @
)8



 nominalPower Handling50W – 200W RMS40W minimum (No upper limit due to APOC protection)Crossover3rd order Butterworth4th 


Physical Dimensions

Height: 900mm (35.4 inches)

Width: 270mm (10.6 inches)

Depth: 382mm (15 inches)

Weight: Approximately 29kg (64 lbs) per speaker

Cabinet Volume: 40 liters (approx. 1.4 cubic feet) 

Notable Design Features

APOC Protection: The MKII features an Audio Powered Overload Circuit (APOC), which prevents driver damage by automatically disconnecting the circuit during extreme peaks.

Contour Control: A built-in user control allows for high-frequency weighting to adjust for different room acoustics.

Vertical Alignment: Drive units are physically stepped to ensure "Linear Phase," meaning sound from all drivers reaches the listener at the exact same