A snapped twig in a jungle produced impulses

It is how we sense direction - so we survived

So now close your eyes

and that image is reality

Passive Model A


Power & bass

500 watts 20Hz

200mm Kevlar LF
28mm silk-dome HF

110 h, 24 w, 24 deep

Passive Model S

Slim performance

Compact realism

300 watts 25hz

160mm Kevlar LF
28mm silk-dome HF

100 h, 20 wide, 20 deep


Years of praise

Hi-Fi Choice Sept 2003. Model S - passive "Allan Hendry built loudspeakers in his teens.. Then, with a BSc, working on phased-array radar, he realised the significance of impulse precision. His MonoPulse speakers deliver a realistic coherence that's positively electrifying, with realism and accuracy which gets you closer to the music." Paul Messenger.

Hi-Fi + July 2021. Model SA - active, 2 x 50W Class D. The preamp, with remote, streams via wi-fi and Bluetooth. Set-up is fast, easy to use, and can be from an existing hi-fi amp. Reaches new generations and, thanks to the slim footprint and range of colour schemes, I see it chosen for more than its sonic performance. That it gets that right too, with a direct and exciting sound with excellent bass, is more than just icing on the cake."

International reports Media and Customers


Active versions with unmatched features

A proven high-end system spec - realism at 500 watts
All inputs - wi-fi, Bluetooth, to 8 ohm direct to drivers
Top DA spec is amp-per-driver. All in two neat cabinets

Active - SA and AA

Full Arylic S10 wi-fi streaming.
With all input options & sockets
and Class D amp in master unit
SA 50, AA 150 watts per channel

Bi-amp - SDA and ADA

Class D amps in both units gives
the ultimate audiophile spec of
an amp per speaker drive-unit
Total powers 200 or 500 watts

Active modes and inputs

Full Wi-Fi – 24 bit master downloads
Bluetooth – 16-bit. Easy access
3.5mm w IR control – c.d., Alexa, etc
RCA – deck pre-amp, w volume control
USB - or memory-stick, socket
Full hand-held remote IR control

Inputs & controls

RCA sockets - inputs to amp
4mm l.s. sockets - link to slave
Direct 8 ohm inputs -to drive units
Master power switch
Amp volume control
Mains input socket


Arylic inputs

LAN - cable or optical from router

USB socket - also for memory stick

3.5mm amp input - with IR control



UK Audio Show Staverton 9/10 Oct
We will be exhibiting - and offering special Prices

MonoPulse - Realism in 20 years of reviews

Hi-Fi NewsModel A. July 2004. "Every audiophiles dream? Allan Hendry believes that for loudspeakers to be realistic, they must be time-coherent - and phase-coherent. The images lock into space, bringing out-of-the-box imaging and realism beyond the physical room boundaries." David Alcock


What Hi-FiModel S. Dec 2005. Five stars "puts emphasis on getting the phase precision between the mid/bass and the tweeter spot on. It's succeeded, so that the Ss latch on to the leading edge of every note with breathtaking confidence."


Hi-Fi +

Model S. Aug 2013. "A remarkable immediacy of a performance. MonoPulse really does bring precision, crispness and realism. So realistic, one is rarely conscious of any intrusion from the speakers themselves."

Many more pages see .. Media reactions

Custom built - for unrivalled choices

Cloth - 8 Options


Top & Base
Oak, Walnut
Redwood, or any
metallic colour.


Model A and Model S



Design and Other speakers



"Other speakers sound blurred and hazy by comparison" (What Hi-Fi)

"Realism you can almost touch"

Tommy Vestsk, Norway, 28 July 2020 "first time ever that i trew (sic) away the boxes"

Return to top for other pages

MonoPulse and the mixing desk

Shut your eyes, relax and listen to MonoPulse. Soon, the speakers vanish, as you listen through them to the mixing desk, to what the producer heard and wanted. Now that can be available via the many services MonoPulse gives you access to.

MonoPulse transparency gives you the original – startling impact on some - or you can relax and sink into the sound on others. Precision becomes invisible.