Have you ever wanted to compare two (or more!) sets of
interconnects or listen to the difference between a couple
of preamps or a few CD players or be your own armchair
reviewer? How about you guys with the Manley Steelhead? You
have one line input available and have to keep swapping
cables when you want to listen to your CD or tuner? Hey, or
would you like to go backwards and have one source drive
either this or that? And why has no one ever commercially
offered a real high-end audiophile thing to do this job?
What you need is a simple A-->B Source switcher, and
that's what the new Manley SKIPJACK® is, and more. But
behind the deceptively simple facia is some incredibly
clever and thoughtful engineering. It's a small box, and it
seems too simple, but there is a lot to tell you about this
new unit. Please bear with me...
A little history. Learning from past experience: We have
been building little switch boxes for years which we use at
the factory or in our listening systems to compare two
different things. When we are evaluating new designs, these
utility boxes can quickly and conveniently switch between
two different circuits either on the test bench or in a
playback system in order to compare A vs. B. Our earliest
rinky-dink plastic in-house switchboxes were just a couple
of RCAs wired to a toggle switch. A few problems with this
approach:
1) Toggle switches produce an audible click because the
contact is not make-before-break.
2) You get a lot of high frequency leakage across small
toggle switches which destroys your imaging cues.
3) You need to use long cables running back and forth
between you and the gear in order to switch from your
listening position while listening so now you're listening
to long cables.
4) Usually you run out of available poles to be able to
also switch grounds which leaves you with potential ground
loops from all the RCAs being permanently tied together.
5) Little flimsy plastic boxes get pulled all over the
place by those gigantic hifi cables and they just won't sit
where you tell them to!
The next step. Drawing from our Pro Studio designs:
Borrowing technology we designed into many custom Mastering
Consoles built for the most discerning clients we have ever
run across, we brought our little research lab switchboxes
to the next level. I call Mastering Engineers "Professional
Audiophiles." These guys put the finishing touches on an
album and make the final decisions on how it should sound
before it goes to pressing. To be able to do this well,
they need a highly precise listening environment, expertly
built room acoustics, durable and reliable equipment, and
an absolutely transparent sounding monitoring/playback
chain.
The heart of a Mastering Studio is the Mastering Console
which provides switching and inserts for the processing
equipment and performs all the source selection and
monitoring functions for the playback chain. Think of it as
a humongous hifi preamp with more switches, knobs, and
inserts than you have ever seen on any hifi preamp.
In the old days we used to build these consoles
entirely passively but with the ever-evolving complexity of
trying to do all this switching not just for two channels,
but two channels balanced (two times everything), and then
now 5.1 Surround (six times everything), and then 5.1
Surround balanced (twelve times everything), we began
looking seriously into relays and we found some excellent
ones.
It ain't just the Relays, it's how you use them: A few
secrets to making relays truly outperform conventional
switching first include choosing the right part for the
job. Contact material choices, construction specifications,
listening tests, and years of experience with these relays
doing 24/7/365 workhorse duty in studios around the world
have led us to our fave relay choices for audio switching.
Another trick we employ is doubling up of the relay
contacts for maximum signal integrity.
It's logical. Isn't it? While you can use conventional
toggle or push-button switches to send the control voltages
to the relays to energize or de-energize the coils that
hold the contacts open or closed, with some simple logic
circuits you can make these relays do more advanced
functions. But then as your feature wish list grows longer,
your parts count gets higher and by the time you're done
with it you have almost built a discrete computer.
Enter the amazing PIC chip and Jerry's clever
software programming. We stumbled onto a very clever
one-chip solution as to how to drive many relays and
indicator LEDs in the advanced manner we wanted to. It is a
multi-input/output device that we program with software
code to do whatever we want it to do. Eeeeks! Isn't that a
microprocessor? Yes it is, but more cool is it turns itself
off when it isn't hearing commands and so it won't make any
noise that can infect your audio. Now with software
programming instead of timing capacitors we can tell this
driver chip how long and when we want the relays to make
their connections, say, for example to make absolutely
silent transitions, or we can write code to put the
Skipjack into A-B-X mode where it selects A, then B, then
either A or B randomly to really test your listening
skills. Lots of clever stuff can be done with this
technology, and we're doing it all here in the SKIPJACK.
Location. Location. Location. There are printed circuit
boards to hold the jacks and relays and parts down
somewhere but no audio travels over any PCB traces in the
SKIPJACK. The entire audio path is hand wired
point-to-point for total transparency. We use a silver core
audiophile wire inside and there's only about an inch and a
half of wire injected into the signal path that you will
listen through. While most people claim they can hear the
difference between cables, I have to doubt anyone can
really hear sonic effects of two RCA connections, doubled
up relay contacts and a couple inches of very low
capacitance silver wire. My design goal here is to provide
a real audiophile grade and totally transparent switcher. I
can't hear this box in or out of circuit. Maybe you have
better hearing than I do... in any case, you won't find
better to do this job.
In a pickle? Switching on the SKIPJACK can be done on the
front panel via the illuminated buttons. This is good for
source selection say, to add up to 4 more inputs to your
Steelhead, or other preamplifiers, amplifiers or whatever
you need more inputs for. In addition, for comparative
switching duties, say for cable shootouts or other A-B (or
A-B-C-D) evaluations, the SKIPJACK comes with a 25 foot
cable remote "pickle switch" so you can sit in your
listening chair and switch between A and B without having
to get up. Switch away! And the LED in the pickle remote
lights up so you can remember which input you are one
without having to look away over at the front panel display
of the main SKIPJACK unit.
Going wireless! But wait! There's more: we also will
(someday) offer a combo RF/IR remote for the SKIPJACK that
can be purchased separately. The Radio Frequency remote can
travel through walls and doesn't have to be pointed at the
SKIPJACK to control it. With this, you can hide the
SKIPJACK back behind your equipment rack if you need to. We
also plan for Infra Red transmission too so you can
integrate this SKIPJACK remote with your existing
programmable remotes, such as a PRONTO or other learning
remotes you might have.
Go backwards! It doesn't care. If you want to come in
through the output with, say your CD Player and then select
whether it will drive your living room amplifiers or your
bedroom system, go for it. There's even modes for allowing
BOTH A and B to be selected at the same time if you want to
use the SKIPJACK as a giant Y-Cable/splitter box. Yeah,
really! You can set it up as a 2 into 3 or 3 into 2 box
where "D" becomes another "X".
Gang 'em up! Hey what if you want to add, for instance, a
Home Theater Bypass function to your main stereo
preamplifier? If you use the 3 into 2 mode where "D"
becomes another output you can have your any of your 3
sources (A-B-C) either drive output "D" which might be your
pristine stereo high-end preamplifier for conventional
stereo hifi playback or output "X" which could be your
surround processor for multi-channel playback. You could
use another SKIPJACK to work together on the inputs of your
main two channel L and R amplifiers and select either the
L&R outputs from your Hifi Stereo Preamplifier or the
main L&R outputs from your HT Surround Processor! Use
the pickle remote cable access on both SKIPJACKs to link
them up so they switch at the same time! Or use the
optional wireless remote. Too cool, huh?
A little HEFT: Another consideration designed into the
SKIPJACK is making it weigh something. Too many audiophile
cables are fat and huge and their weight would pull a
flimsier switchbox off your shelf. We screwed a big hunk o'
steel into the bottom of the SKIPJACK chassis to be able to
counter-balance six of the most chunky overweight cables
you can plug into it. We really did try to think of
everything.
Power to the people! The SKIPJACK is powered up by a little
12 volt DC wallwart. That's all it needs on the outside
with our good filtration and regulation on the inside and
buying one instead of us making one helps keep the cost
down on Mr. SKIPJACK.
This is just the beginning... we will develop more versions
on this theme: balanced versions, more inputs, matrixed
outputs, level presets, there is so much we can do with
this SKIPJACK and its elegant and flexible technology. This
first little baby SKIPJACK is to prove to the audiophile
world that we can build a smart 4 way switcher that is as
close to inaudible as anyone would hope to come. A useful
tool everyone needs. Audiophiles, Reviewers, Store Owners,
fellow manufacturers-- give us a call and catch a SKIPJACK
for your system.
The Manley SKIPJACK: An EveAnna Manley production. Starring
EveAnna and Hutch as the brainstorming and design team, and
Jerry Garszva as PIC programmer and layout engineer.
Prototype Engineering by Gamma Ibarra. Mastered by Baltazar
Hernandez. Handcrafted with pride in Chino, California,
USA!