| Audio Tweaks - DIY |
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The Bob Crump (Asylum) Power Cord
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Assembly (continued)
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| At the IEC end, once you have removed the inch
and a half of the outer jacket from the cord, cut away both
the reinforcing rope ends and the drain wire as well. The
drain wire is to be used only at the wall plug end. Cut away
one half inch of insulation from each wire exposing the copper
strands, and twist each so that you end up with clean wire
ends. |
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Open the IEC and take out the metal connectors.
One by one, insert the wire into the metal connector, tighten
the screw (I chose to use the screws as well) and solder the
remainder of the wire to the metal connector. Replace the
metal connectors back in to their place and close up the IEC.
Make sure you don't accidentally reverse the polarity of the
IEC when replacing the metal connectors back into their place.
The color coding is very helpful and necessary, but at the end
of the day it really doesn't matter which color you use for
line and which for neutral as long as you maintain the same
polarity from end to end. The standard is to use brown for
line, blue for neutral and yellow/green for ground. In the preceding
two pictures I've wired them following this standard but also
making sure that the line coincides with the line of my wall
outlets.
Use a multimeter and test that:
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- There are no leaks from one metal pin to the other,
and
- Polarity is correctly maintained.
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| That's it you're done! |
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Performance |
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This cord blows the generic power cord to bits.
It is audibly much better than the standard stuff most audio
equipment is shipped with. There is an increase in dynamics,
better resolution throughout the frequency spectrum and more
life in the musical outlay. The background is quieter allowing
more detail and spatial information to surface. The entire
musical experience is more involving.
Which power cord works better for me? Well, the VenHaus is
definitely "sexier" and more esoteric. It's got
slightly bigger gauge, better plugs, more shielding and better
insulator quality. But it's also stiffer and somewhat harder
to work with. The Asylum power cord on the other hand is
easier to assemble (apart from the soldering part) and it has
its shield working to protect the ground along with the other
leads. It's also less expensive, part-by-part. But how does it
stack up on sonic grounds? I have to acknowledge a slight
preference for the VenHaus design, but only a slight one. The
VenHaus had a bit more detail, where as the Asylum cord had a
bit more drive (which I also like), so it's not an easy
choice. I must admit my comparison was a bit skewed: The
lengths are not the same (VenHaus are shorter) and one set was
being fed directly from the wall (the Asylum set) while the
other off of my DIY
AC Outlet Center. What I will have to do is setup a more
equal playing field and get back to you soon one the final
word. |
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Conclusion |
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| The Asylum Power Cord is a terrific buy. If
soldering is not your cup of tea, then just get hospital grade
Marinco plugs (or similar) and use them with Belden 19364.
Assembly then is a piece of cake. These cords are such good
investments; you can find them off the net for sale with money
back guarantee. If you have never tried a power cord, try the
Asylum one - you will not regret it! |
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If you would like to comment on this project or suggest
improvements to it, please click here. |
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| Comments
(add) |
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| Gene |
My name is Gene Evely and
my company is Take Five Audio, I sell the parts to
make this and other cables and would like to point out
one thing that was brought to my attention by a
customer of mine. Your parts list is correct where you
spec. the Schurter 4300 for this project but your
photos show you are actually using a 4781. Some folks
(such as this customer of mine) could find this very
confusing. You should note that your photos are of the
4781.
And by the way, my compliments on your site, it is
very tastefully done.
Best regards,
Gene
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| Lee |
I found that ordering the
4781 plugs straight from Schurter was the cheapest way
to go. Only cost me 10.26 plus shipping ($11.09) for 3
of them. I will be building a power cord using the new
VenHaus Shielded 12 gauge 2-wire cable. Since all my
components are 2-wire, it will make for a nice noise
drain. |
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| Stefan |
As an electrician,
Electrical Engineer and audiophile enthusiast I love
this power cord. It's one of those tweaks that not
only look great but the difference in sound is
amazing, too.
However, if you build any power cord, please keep in
mind to leave the ground wire (green/yellow) about
half an inch longer than the other two wires. The
reason is for safety. If somebody pulls on the cable
then you want the ground wire to be the very last wire
that gets disconnected, otherwise you may end up with
110V on the amplifier's chassis if the wires touch
inside the plug.
This does not change the performance of the cable but
it may safe somebody's life once. |
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| Boris |
Great advice Stefan. Thank
you!
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| Mark |
Hi,
Just two comments on making the Asylum power cord. You
mentioned being careful not to cut any of the fine
copper fibers when triming the insulation. I've found
a very good way to do this (if you have good finger
dexterity) is to use a bare one-sided razor blade.
Hold the wire and roll the wire along the blade only
using just enough pressure to cut through to the wire.
Rolled at the right speed, there is no motion between
the blade edge and the wire, this prevents the fibers
from cutting. Try to wrap the cut around so that the
cut matched when you come full circle, then pull the
tube of insulation off with your fingers. I guess this
isn't the safest way to do stripping as far as finger
damage but I've found it works very well because plier
style strippers usually are too close or too far
off(leave insulation behind).
My second tip is to use pure alcohol to clean the
wires of oil. Pure rubbing alcohol is harder to find
but 90+% rubbing alcohol is probably pure enough (the
water dries out pretty quick but of course don't
solder RIGHT away) |
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| Leon |
Question?is the power cord
suitable for mains voltages in Australia, i would like
to make some cords up for my system we operate on 240
volts ac. regards Leon. |
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| Boris |
I recommend you check with
a local, sertified electrician. |
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