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Old 8th February 2008, 07:00 AM   #1
OzMikeH is offline OzMikeH  Australia
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Default Adjustable spdif cable? smells like snake oil to me.

http://www.mitcables.com/pdf/AARM2c3d.pdf

I post this purely to generate some discussion.
I wonder what is inside the lump in the cable and how they think it works to alter a digital signal with a passive device.
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Old 8th February 2008, 11:42 AM   #2
oshifis is offline oshifis  Hungary
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There could not be anything more complex than a tunable optical prism.
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Old 8th February 2008, 03:51 PM   #3
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Here's the referenced patent: http://www.google.com/patents?id=14o...BAJ&dq=5412356

Quote:
Abstract
A single-ended digital interface cable and a balanced digital interface cable having a source end and a load end for propagating audio frequency signals in a digital format is disclosed. Each of the cables comprises a fixed capacitor or a capacitor and switch network which is coupled at or near the load end of the cables for providing a fixed bandwidth or for use in selectively controlling the bandwidth of the cables and a series resistance at each end thereof to dampen ringing.
Price is a bit steep...
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Old 8th February 2008, 04:45 PM   #4
poynton is offline poynton  United Kingdom
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Does it make sense?

I cannot see what he means on the first page, left, between lines 31 and 48, where he talks about cable capacitance and rise times etc. It seems contradictory - or is it me?

And VERY expensive for a handful of cap, resistors, switch, knob and a box!
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Old 8th February 2008, 05:16 PM   #5
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Bah... Garbage.
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Old 8th February 2008, 05:19 PM   #6
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by oshifis
......... a tunable optical prism.

Read the patent stuff

It's not optical !!
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Old 8th February 2008, 05:22 PM   #7
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Well, for that kind of money, the cable could have some pretty exotic circuitry in it ... like hi-rez A 2 D and D 2 A converters plus some actual equalization filters, etc., etc...

My question would be: Why do all that in the cable? Isn't that done in the computer already ... or in the DAC ??
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Old 8th February 2008, 05:23 PM   #8
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Quote:
Originally posted by poynton
And VERY expensive for a handful of cap, resistors, switch, knob and a box!

You are forgetting the är-”ti-ky&-’lA-sh&n.

A tweakable spdif cable is pretty much the wet dream of any self-respecting audiophile. Not cheap but imagine how much you can save by squeezing a whole cable collection into one.

Seriously, a great commercial concept. The bloody spdif thingie is so sensitive to tweaking, that even if all the knob did was compressing mechanically the cable, it would still make a difference.

By changing the characteristic impedance one can produce all types of sound.

And all of it wrong.
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Old 8th February 2008, 05:24 PM   #9
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I saw that, definitly not optical. They basically have a stupid passive EQ of some type that probably cost about $2.00 in parts, slapped it inline with some cables and said.. Oh what the heck, $3K sounds like a well rounded number. I hate Snake oil selling tards.
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Old 8th February 2008, 08:50 PM   #10
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Are you trying to tell me you can hear a difference if a cable simply has pressure applied to it..? *LOL*

Quote:
Originally posted by analog_sa



You are forgetting the är-”ti-ky&-’lA-sh&n.

A tweakable spdif cable is pretty much the wet dream of any self-respecting audiophile. Not cheap but imagine how much you can save by squeezing a whole cable collection into one.

Seriously, a great commercial concept. The bloody spdif thingie is so sensitive to tweaking, that even if all the knob did was compressing mechanically the cable, it would still make a difference.

By changing the characteristic impedance one can produce all types of sound.

And all of it wrong.
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