Pretty sure that voids the warranty. And better make sure that hole is close to the speaker terminals or your pigtail screen termination just becomes another antenna.
Tom
Tom
A small hole drilled & tapped to allow connection of a ring terminal?
By all accounts some PS Audio amplifiers are OK. The eccentric DACs, however, less so.Reading and watching this, brings back some naive audiophile memories back. I am a scientist and therefore believe in objective data and experiments. But in my early audiophiles days, I remember searching for these unobtanium speaker cables made of silver and who knows what. I actually believed it.
I'm lucky though. One day decided to by a PS audio Perfect DAC to replace my "crappy" Oppo 105. The PS audio arrived, I connected it, and was actually horrified at the sound that this thing produced. I sold it within 2 weeks of owning it. Since then, I decided to evaluate equipment based on actual data, not by cost.
Here is my Snake Oil joke
Another guy bites the Snake Oil dust, $600 for 1 lousy meter cable. and please do subscribe to him cos he says that a lot.
The motion sickness-inducing camera "work" tells you all you need to know about the quality of this advice.Those speakers are "just" 1K a pair for comparison. And knowing B&W, they probably are very much non-flat and coloured. The lack of any serious reviews (meaning they actually did any measurements) is telling a lot already. Amp only has a 70 SINAD as well. I would not want that guy anywhere near a mixing table...
What’s with these sites demanding that I take their cookies?The difference between a life with crystals and a life without crystals is like night and day. https://www.harpersbazaar.com/uk/beauty/fitness-wellbeing/a43244/crystal-healing-beginners-guide/
Another guy bites the Snake Oil dust, $600 for 1 lousy meter cable. and please do subscribe to him cos he says that a lot.
No I wouldn't. absolutely not.Who would take technical advice from a guy who wore a Harley sweatshirt and a backwards ball cap to produce a video.
No I wouldn't. absolutely not.
So your telling me that those tinfoil hat people were audiophiles all along?Someone needs to invent an RF shielded suit for me to wear while listening to music, I conclude, based on what Danny showed me.
Haha, I just laughed out loud when I read that, prompting the Mrs to ask, ”Who are you talking to?” Funniest post of the day award goes to you!So your telling me that those tinfoil hat people were audiophiles all along?
RF chokes can help, some are more efficient in specific frequency ranges.
No more than about 5 'windings' in chokes otherwise capacitive coupling may lower attenuation again.
I don't think a different speaker cable will help, perhaps it can when it is screened or twisted.
all one needs to do in such is a case is lower the RF entering the amplifier far enough so 'AM detection' doesn't happen. It doesn't have to be completely eliminated.
Yes, it does happen that speaker cables can pick up RF and this can lead to hum, noises, radio reception.
Relatively very, very few people will actually have an situation where this happens.
An extreme case, to be sure, but if you are **VERY** near an FM or AM station, or an amatuer radio operator, or a medical diathermy machine or an arc welder, you might well experience anything from crackling or other noises to strange hums to outright amplifier failure. RF can get into gain stages in many ways and if your audio system is really near a powerful RF source it can be the most devilish thing to cope with. RF power levels decrease as the square of the distance (in general) so if you are farther than a few hundred feet from any such source you shouldn't have any problems - with the exception of truly powerful broadcast equipment in which case a mile or more might be better.
Pick up some ferrite cores that either clamp on the speaker lines, or a "donut" ring that you loop the speaker wires through once or twice. That will help suppress RFI from hitting the amplifier's output.
Aside: For power amplifiers, the most common RFI path I have seen is through the speaker cables hitting the internal feedback and bias circuits to be rectified and re-appear as audible noise in the speakers. The output impedance of an audio amplifier is typically high at RF frequencies, not low. The input cables are usually shielded and many (most?) inputs include RFI suppression (often in the form of small capacitors if the input stage itself does not reject it).
Find out if the radio station coming through is nearby.
Disconnect all devices from the amplifier and connect 1 speaker.
Then add another speaker.
Find out if this is what's causing it if it starts to happen when connecting another device to the amp.
Maybe loan/borrow another amplifier see if that helps.
Then resort to cable clamp ferrites (with big hole so the cable can be run through a few times), locate that as close as possible to the amp output.
When that doesn't help you can put a common mode choke (2x 1uH) in series with the cable.
When that doesn't help connect 1nF capacitors in series with a 4.7 Ohm between the + output to the metal chassis and - output to the metal chassis (also when the - is connected to ground) combined with the common mode choke.
When this doesn't help use a screened cable and connect the screen to the amp chassis.
When all of this fails try to route cables and locate the amp at a different spot.
After that buy another amp, one that can be returned if that too doesn't help.
Be methodical.
Interesting on the tube amplifier. Curious as to why if you have some time (will probably be above my head).Find a clamp ferrite that has a hole with a diameter of 4x the headphone cable.
Then, as close as possible to the plug make 3 or 4 windings through the hole.
Maybe... that could do the trick.
perhaps the radio station themselves can point you to some tricks or some knowledgeable radio amateur can help.
In such cases it will be hard to get rid of this unless you have some soldering skills and know where to strategically place some capacitors.
Changes are a tube amplifier might be immune.