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Interference issues with monitors
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Yup. I loved that. Dedicated line for monitors. Dedicated line for computer. Dedicated line for TV. Dedicated line for Computer monitor. Yup. Real world scenario 🙂
I’ll look at the wiring – not a bad idea and one I hadn’t considered. This apartment is a nightmare electrically speaking (four circuits…one for fridge, one for outlet in dining room, one for light in hall…and one for everything else – all three bedroom/2 baths of it!)
I’m going to see if the dimmer is making things wonky (as it’s something I hadn’t considered before). But given that it’s a very intermittent problem with these speakers, gut says it’s something non-electrical (as that would be constant) and a shielding issue.
Which is a shame as I really like the way these speakers sound…
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Jonathan.
APC pro what model number?
Dimmers won’t bring in RF they’ll buzz.
If the wiring is old and you have different appliances and an elevator in the building, all of that could be dumping into your power.
Wall dimmers in someone else’s apartment could be the cause.
Saying no to going to B&H to find out if you can see if their box will help is the worst sort of denial.
Do you want to find and fix the problem or not?
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It’s not denial…it’s being practical (especially since I really doubt it’s an electrical issue as it’s not a constant problem)
If I had a spare $2400…but right now given what my accountant told me I owe for taxes, that’s not an option – or rather it’s a last resort (buying more expensive speakers/monitors like Genelec 80s to see if they have better shielding…much better option). Especially as right now it’s not a huge interference issue and is largely ignorable (unlike the other KRKs which got to the point that I couldn’t listen to anything)
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Hi Ty,
If the RF is traveling through the electrical line, where does it originate? Can an electrical line pick up RF from the air? The way speaker wire can? And if so, why does electrical wire not do this constantly?
In other words what makes a line dirty power vs. clean? And once discovered to be dirty is the only answer a high end conditioning box like the one you are recommending? In the studio installations I’ve seen where they have these boxes built in, I do not assume that the basic wiring with all the dedicated lines is dirty. I had therefore thought it was just to keep things as clean and constant as possible.
MacPro4,1 2.66GHz 8 core 12gigs of ram. GPU: Nvidia Geoforce GT120 with Vram 512. OS X 10.6.x; Camcorders: Panasonic AG-HPX170, Sony Z7U, Canon HV30/40, Sony vx2000/PD170; FCP 6 certified; write professionally for a variety of media; teach video production in L.A.
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RF may originate anywhere. It comes in over anything conductive, including up the power line or ground system if exposed and not terminated properly.
I had a friend with RF problems in Boston. His DAW was getting regularly occurring hits. Turns out it was the radar at logan airport sweeping past his third story studio.
I had another client who had a recording studio with RF problems in the mics. He knew his ground system was iffy. We tried new cables, different wiring of cables, nothing worked. I went in one night and in trying to move the mic cables to null the RF, I had to move his copy stand. It was a metal music stand. The RF from the tV station 1/4 mile away was being re-radiated by the copy stand. The solution was a wooden copy stand.
There are different kinds of dirt. That’s why I asked Jonathan exactly WHICH box he is using so I can figure out what kind of filtering it does. He may not need the $2400 solution, but my point was, he could probably get B&H to sell him that with a return guarantee..or get them to loan him one to find out if that was the problem.
Regards,
Ty Ford
Cow Audio Forum LeaderWant better production audio?: Ty Ford’s Audio Bootcamp Field Guide
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If you use the words “loan” and “B&H” in the same breath (especially in regards to a $2400 device)…I’m thinking you’ve never been there (even though they have a good return policy, doing so is…not necessarily the easiest thing depending on whom is working the desk that day). This is a company that doesn’t even put gear to try out unless the manufacturer has paid them to do so… So forgive me if I’m not about to rush out and buy something that expensive unless it’s a last resort as it is definitely a ‘you put a microscopic ding in it? you bought it…’ type of affair sometimes…
I have an APC XS-1300
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Jonathan,
If you have this: https://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BX1300G&tab=features
It doesn’t do any filtering. Just spike suppression and battery backup.
If you have dirty power it will not filter that out.
If you run on its battery, do you have the same problems?
I have a contact in NYC. Waiting to hear back.
Regards,
Ty Ford
Cow Audio Forum LeaderWant better production audio?: Ty Ford’s Audio Bootcamp Field Guide
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That’s true Jonathan. What I suggest is you find a service rep there that deals with profession audio gear.
First find out who there best rep is for this type of gear. Tell them you have a small post house and need help isolating an RF problem. Then establish an email relationship. Explain your RF problem and that you are looking for solutions. Everyone knows in the audio field that it can come down to trial and error. Then deal only with this rep. Make sure he is in when you stop by. Keep all packing material. Take pictures as you go when you unpack it. Use scissors to cut open sealed plastic but leave cut piece attached. Nothing sells still new as a neatly repacked item. BH is the biggest vendor for the entertainment industry for a reason. They do honor the warranties and exchange policy and do not sell grey market stuff. On the other hand, they really are mostly not helpful when it comes to helping anyone buy what they need or technical support. But know what you want and they are the biggest if not the best.
Since you are getting different degrees of Rf in different outlets in the apartment, I suspect that maybe something can be done with the room wiring and a cheaper conditioner. For sure check out the wiring behind the outlet covers. And listen to Ty’s suggestion to figure out if it is the ground wire.
Also a different brand of speaker just might do the trick.
MacPro4,1 2.66GHz 8 core 12gigs of ram. GPU: Nvidia Geoforce GT120 with Vram 512. OS X 10.6.x; Camcorders: Panasonic AG-HPX170, Sony Z7U, Canon HV30/40, Sony vx2000/PD170; FCP 6 certified; write professionally for a variety of media; teach video production in L.A.
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Great suggestion regarding running off battery (of course the speaker is behaving itself right now…)
Thanks! That will at least clear up if it’s electrical or interference from another source
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