Intercoms

MI-20 MI-40 ( NON-VOX ) no stock

This is a simple mono ( not stereo) wired two way system that runs all the time it is switched on . Each headset , one for rider and one for pillion , has twin earpieces and a mic that velcro inside a full face helmet We are developing a boom mic that sticks to a velcro square adhering to the outside of the helmet, (we now have the boom mic option available !! ) Although this is non vox intercom , it doesn't have the absolute quiet and operational sophistication of VOX operated units ,( MI-40 is quiet when not in use ) However it has low residual noise pickup and is a very good economical alternative. We have the circuit diagram for this unit and also have some very happy customers who sing its praises !

This is a simple and inexpensive unit that consists of two headsets both each with two flat thin (less than 8 mm) earspeakers and a small microphone that Velcro into the inside of the users full face helmet (it can not be fitted to an open face helmet as there would be no where to place the microphone) . The intercom requires no modifications to helmet, bike ( or riders) . There is ample length of curly cable to run between the rider and pillion . The small and light common amplifier unit is powered by 4 AAA cells ( use alkaline) draws 5 mA with no speaking rising up to 70 mA on voice so the batteries should last for many many hours with non stop use, and much longer with intermittent use as there is time for the chemistry in the battery to "bounce back" somewhat. People who have purchased this unit have told me they have had 7 days of use and with it switched on and that includes about 4- 5 hrs of riding per day , the amplifier would easily fit into an empty cigarette packet . There is a combination On-off Volume control on the top where the two right angle 3.5 mm stereo plugs connect. The whole system takes about 1 minute to install and to have rider to pillion communications. The unit will "squeal" if only one headset is plugged in and it is turned on ,when the second headset is plugged in this doesn't occur, this is normal and not a fault. To get the best "at speed" performance , make sure the earspeakers are correctly positioned over the ears ,move them around over the ears until they are in the "loudest" position .The intercom has low back ground noise due to the noise reducing microphone system and there is ample volume to be heard comfortably at up to 140 Kph.

The MI-40 has a Push to Talk button for each headset , this means you do not hear anything through the earspeakers unless you push the button to speak to the other party , hence no added low level road, wind or engine noise . The PTT button can be velcroed onto the riders left handle bar and the pillion can hold theirs in their hand

Use of the MP3/radar detector cable with this unit drops one speaker off the intercom so the music can stay in stereo ( both speakers)

MI-40 the same as MI-20 but has PTT buttons for absolute quiet while not talking

Hi folks Thought we’d drop a line and give you some feed back on our new el-cheapo ($117) intercom unit. In general, we are very happy with it. Not having ever used any other such device, it is very pleasant to now be able to talk to each other. For the price, we think it is very good value for money.
    Our machine is a 1998 GSXR600 with a Kerker (Supertrap USA) racing can fitted. In other words it’s quite loud, probably not street legal. We initially had a few problems getting the speakers comfortable in our skid lids which are HJC Streetfighter and Cirrus V2. But after some trial and error and red ears, we seem to have got it all more comfortable. Our limit on the bike is usually about 1 hour anyway before bums become numb or legs cramped, both being in our 40s. We did lose the foam cover for one mike by accident but didn’t lose it and we’re able to glue it back on without any problem. Communication seem fine for speeds up to 140 kph, after that wind noise was excessive.
    Generally we are very happy especially considering the cheap price. A small modification we have done was to use a white out pen (ball point type tip) to mark ON and OFF on the unit and also a small line on the dial for volume. This had saved our ears! Very easy to do and makes a big difference. Also we have found it best to have both cables plugged in to the unit prior to switching on as very loud screeching noises occur otherwise. For our bike, when riding very hard, high engine revs, the unit amplifies the sound too much but at touring speeds is perfect with volume set at the minimum. If we had a quieter exhaust this would not be an issue.
We recently did a weekend trip from Auckland to Taupo / Waioru / National Park / Turangi / Taupo / Auckland, using all the back roads between Auckland and Taupo and we’re very happy with our purchase. Thanks very much for a good value for money purchase.
Cheers    Dave and Liz Auckland,

In July I purchased a Rider/Pillion intercom from P.H.S in Rotorua. I had checked out all options available that I could before I made my purchase and had also been able to borrow and trial some systems none of which I was happy with because of background wind noise. I had originally wanted a vox system but Mike assured me that I would be more than pleased with the P.H.S non vox system. I decided to give it a try and ordered it direct from P.H.S, the service was first rate and the unit was delivered the day after I ordered it. I installed it into a pair of HJC helmets in about 30 minutes with no modification to the helmets being required and then out the door for a test ride on what was a very windy night. At speeds up to 120kph we could talk at a normal level and hear each other with no problems, at 140kph we had to slightly raise our voice level but it was still easy to hear each other. At no stage up to 140kph did we have any irritating background wind noise coming through the system. The weather hasn’t been great for riding lately so I can’t comment on battery life at this stage but I can say that at $117 the P.H.S system seems to be great value for money to me.
Satisfied Riders

We have ironed out all the teething problems with the motorcycle intercom and it's great. The reason Richard had so much trouble was he needed a new crash helmet. The old one was so worn inside the ear pieces wouldn't stick in, problem solved. He now has a new helmet, the ear pieces are in place and they stay in.We went for a 320k run yesterday and he was thrilled to bits no problems the intercom was perfect even cruising at 100kph we couldn't believe the clarity.

Hi
Actually I used it for the first time at Easter. It works great. I get a
bit of wind through my helmet around 100k so my pillion can't hear so well,
but all I have to do is duck my head a few inches to below my windscreen and
she can hear perfectly again. If I get a chin guard it would fix it
permanently.
Also I hear from my pillions mic the low exhaust notes coming from the back
of the bike. It doesn't drown out her voice, it more enhances the exhaust
note, which is rather pleasing as my bike is a V-twin.

All up I am very happy with it and in my opinion it out preforms one that we
had previously borrowed from a friend that costs double that of your unit.
Your ear pieces are more comfortable and sound more like a headset rather
than speakers sitting beside your ears, if you know what I mean.

Thanks for your interest.

Adam.

The last rally we went to was a Road Trial where you get instructions and question etc to tell you how to get where the site is. The new intercom made this so much more enjoyable for us as the instructions on the tank bag could be read to me and I could join in the fun of knowing what was next, where we were going (when we were lost) and what we had to look out for, and also I could let him know when he had overshot a street or two!! I think without the intercom it would have been rather boring.

MI-30 (non vox) UHF Radio - Pillion Interface Unit
This motorcycle to motorcycle communications concept has been developed over the past year and has gone through many experimental and developmental stages to arrive at the final successful configuration. It does now have the optional rider-pillion intercom function the MI-30 Kit, wont interface with our WT419............ Bummer !

Also take a look at the new inexpensive CUSTOM based radio system as an optional wireless rider- pillion intercom) discontinued

Rally car / hill climb Intercom:
This is an extension of the motorcycle rider to pillion headset . It has ample volume for car rallying and the added bonus that the TWO WAY RADIO HEADSET (see below) will also plug into the small amplifier unit. These can then be used as touring headsets . The headsets system has quick connect minidin plugs with a positive feel and they do not fall out! see NON VOX above These units have been successfully developed for use by cars competing in the Targa rally

(I have left this information in for those who are lucky enough to have one or can still purchase one elsewhere )

The units best feature is it has an optional pillion passenger headset. It is excellent value for money and has performance features you'd normally pay big money for . It is a Vox (automatic) or PTT (manual) operated unit whose dismantled headset is able to be placed into a full face motorcycle helmet without modifying the helmet in any way or affecting its safety rating. In the two way radio mode, it is able to communicate with another unit on the same channel up to about 400m away in open country.( overseas customers only)