Q : What about Shipping and Returns?
A : See
this page for everything about Shipping and Returns
Q: What are BlackDiscus made from?
A: They made of an epoxy-based composite. The
composition, while important, is not the key factor in
how and why BlackDiscus works. In fact we have used
dummy devices, made from the exact same compound. But
the dummy devices do not undergo any of the processing
steps that make BlackDiscus special. Consequently, the
dummy devices can be easily blind picked from the real
thing. Also the dummy devices are indistinguishable from
a plain washer of the same weight (a more obvious
Q: Are they toxic or radioactive?
Q: How do they work - what do they do exactly?
A: Although I discovered the effect accidentally, I have
been experimenting and researching just about every day
since. And I've gained a pretty good idea of some of
what these things do. I believe that they do more than
one thing - at least two, maybe more. One effect seems
to be more localized than the other, but they seem to be
One effect could be loosely termed "interference
disruption", and operates over a fairly short distance,
a few inches say. The other effect I don't have a name
for, but that operates over a larger distance, several
So to understand how to use them, you need to focus on
the first effect, and the second effect will naturally
Compared to ferrites or other devices that absorb and/or
EMI/RFI, BlackDiscus works in a different way, using the
complex, non-linear properties of the material after
As an aside, it's instructive to listen to the effect of
a cheap ferrite cable clamp (used a lot for computers,
etc.). I found that on AC and DC power supply cables,
they sound awful. Not that surprising, as they don't
(normally) absorb RF, as much as reflect it.
Q: Are they magnets?
A: No. BlackDiscus contain ferrous compounds which are
attracted by magnets, but they are not magnetic
themselves. The presence of iron compounds actually has
little to do with how BlackDiscus works. Without
processing, the discs do nothing. And we have made
samples from completely non-magnetic materials.
Some people have claimed that magnets have the same
effect as BlackDiscus. My research has found that
magnets and ferrites make my system sound worse, not
better. Bass is weak, dynamics all over the place, and
none of the positive benefits of BlackDiscus are
It's well understood, what happens when you put a magnet
on, say, a wire carrying an alternating current (e.g.
signal or mains power). Basically a force is exerted,
and this is determined by Flemming's Left Hand Rule
With and alternating current the effect is to try to
make the magnet wobble from left to right. Depending on
the mechanical coupling between the wire and the magnet,
the strength of the magnet, and so on, some of the
energy is turned to heat, and some is reflected back,
This is not a recipe for improved sound. The magnet will
look like an additional load, but a highly non-linear
I recommend that you try comparing BlackDiscus and a
magnet if you are interested. Unless you are very lucky
I think you will find the BlackDiscus sounds a lot
Q: How many can I use?
A: This one is not easy to answer, as systems vary in
their response. But on my system and on those that I've
tested with, I have not found there is a point where the
BlackDiscus are "too much". Rather what happens is that,
say I put 10 discs in one place. This sounds pretty much
the same as if I put one or maybe two discs in that
Q: Do you make them in your kitchen ?
A: No. My wife would kill me. Actually the question
relates to the heat treatment. I tried the first time
heat treating in the kitchen, but it makes a terrible
smell and lots of smoke...never again. So I bought an
oven for this purpose and 'cook' them outside now. Note
that the heat treatment is some 'cream on the cake' as
far as processing goes - the final step that rounds
things off nicely. The main processing occurs before
this during curing. (This also means that rain can
interfere with production..)
Q: What are the Voltage and Temperature limits of
A: BlackDiscus devices are non-conductive. The can
withstand mains voltage (240VAC) with no problem. Even
tube high voltage (e.g. 600V) is OK. But be careful using
them with voltages more than a few thousand volts.
Temperatures : BlackDiscus can withstand 150C
(300F), which is probably hotter than your audio system
should get. They can get a bit pungent at this
temperature (burning plastic smell) but they will not
catch fire or burn.
Q: Where is my Tracking Number?
A: If you have selected International
your shipping option on Check Out, it means your parcel
does not come with any tracking ID. However, from our
experience International Post is very reliable to
destinations in the US and most European countries. Please
see this page for more details.
Q: How does your 30-day return policy work?
A: To enable you to try our products without risk, we
will accept returns for 30 days after you order, and
refund the purchase price (not including shipping).
Human nature being what it is, we have to impose some
1) Only one refund per customer. This means we will only
refund one order (not one item)
2) No refunds for any items we specially order for you
(e.g. special power plugs, etc.)
3) For NEO-OCC
due to their expense, we can only offer 30-day returns
on one cable
How to Return
Here's what you need to do:
Contact us via email first to let us know about the
item(s) you want to return.
Send the items you want to return back to us. The return
address was included in the original package - you can
cut this out and stick on a parcel. The address is:
Mad Scientist Audio Ltd
1 Ellivani Rise
Be sure to include some details that let us find your
order. Typically your name and email should do the
trick. If you have the Paypal transaction ID, so much
the better. If you did not buy them from us, do not
return them as we cannot refund orders we did not sell
in the first place.
The item(s) should be posted no later than 30 days after
you ordered. We advise you to use a tracking #, as if
the post office loses your package (which they do about
3% of the time) then you are in an unfortunate position.