Here's an interesting new box from the miniDSP folks for those who do their crossovers in the digital domain. miniDSP UDIO-8 - Multichannel USB to AES-EBU interface. Now you don't need a full size case to get 8 digital channels out of PC and into the DACs of your choice. Mildly powerful fanless PC, ultimate equaliser or similar and job done.
I'm sure there are pro boxes that do this, but I haven't found them.
Other nice thing they have recently launched is miniDSP EARS - USB Headphone Test Fixture . Dunno how that compares to the big $$ stuff but at 199 tempting to get.
I'm sure there are pro boxes that do this, but I haven't found them.
Other nice thing they have recently launched is miniDSP EARS - USB Headphone Test Fixture . Dunno how that compares to the big $$ stuff but at 199 tempting to get.
Derfy,
What law of physics is violated when a difference is heard with an RG59 interconnect by removing the jacket?
Where is the list of laws passed by the physics legislature?
Is "everything that goes up has to come down" a law of physics?
What law of physics is violated when a difference is heard with an RG59 interconnect by removing the jacket?
Where is the list of laws passed by the physics legislature?
Is "everything that goes up has to come down" a law of physics?
Thank you Richard! I have been searching for a non metal material that can shield. Audioquest says that their cables (even power cables) have many layers of shielding, and they are not all metal. They say they are "shielding the shield" with this method. From what I have heard of their cables it helps.
Shielding of Boxes and Enclosures (Part 1) << Electronic Environment
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The next question is how/why does this directional characteristic cause changes in system excess noise ?
Perhaps Mr Bybee has some idea.
Help me out, Ed.
I'm not sure you can get measurable shielding from E fields with a non-conducting jacket. If it's conducting it could be an issue, especially for power cables.
Not to be confused with a conductive rubber layer used to reduce handling noise in Mike cables etc.
There are ferrite loaded rubbers for magnetic shielding in cables but not useful for electrostatic shields.
Bendnig a coax sharply, even semirigid, will deform the shape, even if the shield is intact, enough to show on a tdr. Same for Cat 5.
Not to be confused with a conductive rubber layer used to reduce handling noise in Mike cables etc.
There are ferrite loaded rubbers for magnetic shielding in cables but not useful for electrostatic shields.
Bendnig a coax sharply, even semirigid, will deform the shape, even if the shield is intact, enough to show on a tdr. Same for Cat 5.
Rick Miller ---
Its just knowing what question to ask the all powerful OZ (Google).
If you know it can be used in shields, then you ask for it that way.
Many times I ask my question several different ways because it gets interpreted differently... even though you think you are asking the same question, Google doesnt think so.
THx-RNMarsh
Shielding is a matter of either reflecting or absorbing. As the freqs get higher and higher, the freq get reflected --Low freqs get absorbed. So high freq only need to be thin and low freq shielding has to be thicker - deeper penetration. With cable shields.... the braid is for low freqs and the foil is for high freqs. The braid isnt 100% coverage so HF will get thru between the gaps; Cable signal leakage -- in or out.
Its just knowing what question to ask the all powerful OZ (Google).
If you know it can be used in shields, then you ask for it that way.
Many times I ask my question several different ways because it gets interpreted differently... even though you think you are asking the same question, Google doesnt think so.
THx-RNMarsh
Shielding is a matter of either reflecting or absorbing. As the freqs get higher and higher, the freq get reflected --Low freqs get absorbed. So high freq only need to be thin and low freq shielding has to be thicker - deeper penetration. With cable shields.... the braid is for low freqs and the foil is for high freqs. The braid isnt 100% coverage so HF will get thru between the gaps; Cable signal leakage -- in or out.
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This is from the Audioquest web site :
Carbon-Based 6-Layer Noise-Dissipation System (NDS)
It's easy to accomplish 100% shield coverage. Preventing captured Radio Frequency Interference (RFI) from modulating the equipment's ground reference requires AQ's Noise-Dissipation System (NDS). Traditional shield systems typically absorb and then drain noise/RF energy to component ground, modulating and distorting the critical "reference" ground plane, which in turn causes a distortion of the signal. NDS's alternating layers of metal and carbon-loaded synthetics "shield the shield," absorbing and reflecting most of this noise/RF energy before it reaches the layer attached to ground.
Carbon-Based 6-Layer Noise-Dissipation System (NDS)
It's easy to accomplish 100% shield coverage. Preventing captured Radio Frequency Interference (RFI) from modulating the equipment's ground reference requires AQ's Noise-Dissipation System (NDS). Traditional shield systems typically absorb and then drain noise/RF energy to component ground, modulating and distorting the critical "reference" ground plane, which in turn causes a distortion of the signal. NDS's alternating layers of metal and carbon-loaded synthetics "shield the shield," absorbing and reflecting most of this noise/RF energy before it reaches the layer attached to ground.
Thanks for the info Richard. I am wondering if I could use automotive vacuum or fuel line/hose as a non metal shield for a DIY cable, along with copper braid/foil. I know in the old days you could use a short piece of vacuum hose as a spark plug wire. The carbon black in it would pass the high voltage to the plug from the distributor and the car would run!
All the minidsp products are very cost effective esp for the hobbiest. One thing I dont care for is they are a bit too hobby oriented..... for people who dont mind jumping thru hoops to make it work.
A pro product does all for you... no more software interactions to make it do what you are looking for. But they do cost more. I am now thinking of using my Audyssey EQ 'automatic' EQ system (8 chnl) It measures and then I do nothing more but push a button and it makes the inverse curve and flattens the response for me. No horsing around with the data. Nothing manual.
That is what I see as the BIG difference between pro or industrial T&M and consumer. But instead of 200-300 dollars, it is 2000 dollars. but it works better and saves a lot of time. It is for installation/sound contractors... where time is money lost.
THx-RNMarsh
Cable guys? When they first offered stereo cable boxes there was a pilot tone similar to FM and I pointed out to our cable installer that having two volume controls meant that the user could turn the volume too low on the box so the pilot was below the detection threshold of the TV and the stereo went away. He stared at me speechless.
I will point out this is a DIY forum.
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hahahahaha -- I knew you would say that. 🙂 so predictable. re DIY
When I work on my car as a DIY project -- I dont make my own car tires, either. Or make my own sensors or build a custom car computer to run everything... There is a point where DIY is past the point of reasonable.
My time has always been important to me. Even though retired. Its time, not the DI All Yourself aspect that bothers me. Next the uninspired performance... mid-fi. I bought 4 electronic cross-overs... all mid-fi. Depressing.
-RNM
When I work on my car as a DIY project -- I dont make my own car tires, either. Or make my own sensors or build a custom car computer to run everything... There is a point where DIY is past the point of reasonable.
My time has always been important to me. Even though retired. Its time, not the DI All Yourself aspect that bothers me. Next the uninspired performance... mid-fi. I bought 4 electronic cross-overs... all mid-fi. Depressing.
-RNM
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Like building your own speakers, amps, just about everything that goes on here? Lots of folks here have no problem with the speaker EQ stuff and there is lots of help.
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Where here is a sota flexible cross-over without mid-fi performance/sound and using DSP?
AND, fully developed software. PnP. No jumping thru hoops to get it to so-so work.
THx-RNMarsh
AND, fully developed software. PnP. No jumping thru hoops to get it to so-so work.
THx-RNMarsh
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Well first you have to define SOTA...
MiniDSP also have products that do automatic room corrects in their Dirac live series. However neither those nor your Audessey will calculate cross-over curves for you.
Note the product I linked does not do any eq its just a handy USB to spdif converter for multichannel. This is useful for those who think that any DAC under $3000 is midfi but want digital crossover capabilities.
MiniDSP also have products that do automatic room corrects in their Dirac live series. However neither those nor your Audessey will calculate cross-over curves for you.
Note the product I linked does not do any eq its just a handy USB to spdif converter for multichannel. This is useful for those who think that any DAC under $3000 is midfi but want digital crossover capabilities.
The path of least resistance for your own personal use is to take the I2S inputs / outputs of the DSP in the miniDSP and run them to your own converter board. If you are happy with the DSP functionality, this will let you get SOTA converters hooked up.
The new minidsp SPDIF I/O box looks midfi to me, as it uses SRC4382 instead of SRC4392 rate converters. The box might have cost $20 or $25 more with better parts, but guessing $299 looks a lot better to buyers than $324.
Might be worth talking to a pro audio dealer to see what is available there.
Might be worth talking to a pro audio dealer to see what is available there.
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Ed should chime in here, he should have some familiarity with those products.
There are several types, most of them are marketed/developed with specific systems (speakers) in mind.
then there are the mid fi pro products that cover more territory but are price point constructed.
I work in the studio world not the live sound world.
Cheers
Alan
There are several types, most of them are marketed/developed with specific systems (speakers) in mind.
then there are the mid fi pro products that cover more territory but are price point constructed.
I work in the studio world not the live sound world.
Cheers
Alan
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