The Neutron Five 2.1 system (revised)

Now Discontinued, to be replaced by Active DM5s

See AVI Forum for details

A compact 2.1 system with 4 digital and 1 stereo analogue input to get the most from your multimedia

Compact and cost effective. For not much more than the price of an average AV processor and speakers or two thirds of the cost of the ADM9T + Sub, you can have our powerful and wonderfully clear, three box only, Neutron 2.1 system.

High sound quality. Clarity, especially with speech, and high dynamic range to cope with the very loud passages in music and movie sound tracks makes AVI systems more relaxing to listen to for long periods of time.

Flexible. With lots of digital inputs this system is ideal for connection to DVD players, gaming consoles, iPods, Apple TV, satellite receivers, Sonos and other music only streaming devices etc. Also if a full 5 or 7.1 is required your Neutron system can operate as the front left, right and LFE Sub. More Neutrons can be added to complete the set up.

Better suited. With a generous 100 Watts per channel for the Neutrons and another 100 for the Sub the Neutron Five 2.1 system has more dynamic range than most old fashioned hi fi and so is better suited to the high dynamic range of movie sound tracks and the best music recordings.

Digital perfection. Modern digital sources are capable of incredibly high sound quality, yet this is rarely achieved because speakers and amps donít come up to scratch. AVIís are amongst the finest you can buy and so will enhance enjoyment of all your media.

Available. Our online shop is a click or two away and delivery a few days maximum.


Analogue input sensitivity 500 mV
LFE input 500mV
Amplifier Power 3 x 100 watts linear Class AB
Distortion Typically 0.002%
Volume control range 100dB (1/2dB steps)
Electronic crossover 40Hz and 80Hz
Optical S/PDIF Stereo data 24 bit 96 kHz
Fuse Type T1A spiral wound for 230VAC
T3.15A spiral wound for 120VAC
Bass extension Useful output to 30 Hz
Control by remote IR handset
Weight 26 kilos packed
Dimensions 34 x 34 x 34 cms



The Neutron Five speakers

AVI has a passion for miniature speakers, properly designed, as are Neutron Fiveís; they often give far better results than much larger and more expensive ones. They are also easier to accommodate and cost less because smaller boxes are cheaper. Most of us need or prefer smaller speakers.

In 1994 we introduced the original Neutrons, they were a big improvement on our ďReferenceĒ LS3/5Aís and sounded similar. They had very good reviews and sold surprisingly well but we didn't like them so we re-designed them as NuNeutrons. These were improved to become Neutron IIIís and eventually, improved again to become the Neutron Fiveís. Thanks to almost all the Hi Fi magazines, Neutrons are an established reference and have sold in thousands and continue to do so. Users include small classical record labels, film scoring mixers, broadcasters, composers, critics and thousands of Hi Fi and Music enthusiasts the world over.

Technical description
The Neutron Fiveís comprise of a five litre, ported enclosure, fitted with a 125mm doped paper mid/woofer and a "top of the range" 25mm fabric domed tweeter. The small loss of sensitivity involved with this type of drive unit is more than offset by the greatly reduced distortion/colouration that they offer. The crossover is textbook second order and uses massive Ferrite cored inductors and polypropylene capacitors. Internal cabinet resonances are damped by a measured quantity of acoustic wadding. 

Neutron Five specifications

Five inch two way system with 25mm doped silk composite domed
tweeter and curvilinear coned bass driver with 25 mm voice coil

Frequency response 120Hz - 23 kHz +or- 2dB and -6dB at 65 Hz
Amplifier requirement 50 - 150 Watts
Sensitivity 87.5 dB/W/M
Cabinet volume 5 Litres ported
Nominal impedance  8 Ohms
Crossover 2nd order Linkwitz-Riley at 3.4kHz and using large inductors and metalised polypropylene capacitors on heavyweight PCB
Cabinet Piano lacquered Black 12 mm MDF
Weight 10 kilos packed
Size H X W X D 310 x 160 x 200 mm

The size of the Neutron Five means it can be tucked away
in discrete places