Read what some of the leading reviewers said about some of David’s designs!

the amount of low bass energy this speaker can produce is astounding..

is up there with the established big boys, ATC, Genelec, PMC and the rest..

Hugh Robjohns optional, I would suggest imperative extra is on site analysis and alignment of the system..

the results were most impressive, exhibiting delicacy and presence conveying the subtle detail..that few boxed loudspeakers can equal

Ivor Humphreys

"there was absolutely no hint of either compression or distortion, just limitless power coupled with lightning speed"

David Allcock

Other Links

Peter Mapp article and others, Look here.

Having a good listening room goes a long way towards creating the final goal of superior sound quality reproduction. Studios may go to some lengths to create such an environment but it is probably the case in the majority of situations that this may not be possible.

It is most definitely the case, particularly at lower frequencies where wave lengths are longer that one of the major problems is always the other loudspeaker! Some of the various interference effects are shown in the Polar Response section of this site.


The solution is relatively simple and is derived from professional live music techniques.

By having “pairs of pairs” it is possible, either by placement alone, or applying actual delays to one of the sets, to improve the polar dispersion of the stereo set quite dramatically by virtually eliminating the interference patterns in the bandwidth of interest.


Add to this the benefits of double the power handling and the ability to create cardioid, dipole, bipole or monopole dispersion and it becomes clear that two pairs of loudspeakers offer countless number of advantages over the traditional single pair.

The Twins are all this and more..!

Although externally uncluttered in appearance the cabinet is in fact a Dual Chamber Aperiodic design. The Peerless driver is first loaded into a tapered small cabinet and then vented into the larger volume of the cabinet with an aperiodic vent. The cabinet is entirely constructed from 25mm timber and cross braced as well to provide a superbly compact rigid design. Built in the UK of course!


The dual chamber design has many benefits. The driver sees a small damped cabinet which is ideal for midrange frequencies, and the tapered internal shape is ideal for a low colouration performance. Long wavelengths at bass frequencies can pass into the second chamber through the damped vent. The Peerless driver still sees the cabinet volume as a whole and the cabinet volume is configured to be near to the driver VAS specification. This enables the design to respond virtually all the way down to it’s Fs and with the transient stability of a true 12db/octave roll off design.


Power handling is substantially more than an equivalent reflex ported design at low frequencies and group delay is much lower.


For many applications the Twins can be used, as previously stated, in virtually any configuration. They will happily respond down to around 35Hz and may prove to be the only loudspeakers you need before crossing over to the chosen panels or satellite loudspeakers. Certainly, as there are four of them, each with a power handling of at least 100watts rms, the total output of around 115dB may be sufficient. Domestic HiFi and studio may find this enough!


For the ultimate though they can be partnered with Wide Boys and used from, say, 100Hz upwards. Given the sub woofers are also capable of any polar response dispersion type the user will not be short of combinations to create perhaps one of the most authentic sounds they have heard in the wide range of venues, perhaps best suited to high end domestic systems and modern studio facilites.


Dual Chamber Aperiodic Twins with 10” high quality Scandinavian drivers.
700mm(H) x 330mm(W) x 345mm (D)
Weight: 20Kg
Power Handling: 100watts cont.
Efficiency: 88.5dB/watt/8 ohms
Impedance: 8 ohms each
Response : Fs (35Hz) - 1.8*Khz Max

(* A single driver responds flat on axis up to this frequency where it rolls off smoothly. The Sound Right chosen crossover to the panels is around 450Hz for a pair of Twins per channel. The purpose of the adjacent drivers is to control the horizontal dispersion without lobing effects and more closely match the dispersion of DML Panels)

Price per cabinet: £375 + VAT
Having fun with Twins
Some performance plots

(Standard satin black scuff resistant finish. Other finishes available, please ask)