Archived posting to the Leica Users Group, 2009/01/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Certainly coax cable does not reject interference like balanced systems but how much it picks up is more affected by how the screen is terminated at the connector than anything else. A period doing QC on instrumentation cables on a rf interference rig taught me a lot! Nevertheless a 4ft length in domestic situation is unlikely to create big problems, though this issue with high levels of inaudible rf picked up by cables and upsetting electronics unsuited to it is probably the reason some cables do sound different to others. The extra complexity of termination of balanced connections is extremely likely to more than negate any potential benefit. Frank --- On Fri, 16/1/09, Jerry Lehrer <glehrer@san.rr.com> wrote: > From: Jerry Lehrer <glehrer@san.rr.com> > Subject: Re: [Leica] OT: Audiophile Question > To: "Leica Users Group" <lug@leica-users.org> > Date: Friday, 16 January, 2009, 1:17 AM > Len and Gene > > Even with the very best RCA type connectors and the best > cables, RCA connector/cables pick up > interference unless they have an added external shield, > grounded to the source only. > > Jerry > > > grduprey@mchsi.com wrote: > > Len, > > > > > > Yes, I would not use Radio Shack RCA, or any > connectors for that matter. Yes, A proper RCA is a very > good connector, but the cheap ones are indeed disasters. > > > > > > Gene > > -------------- Original message from Leonard Taupier > <len-001@verizon.net>: -------------- > > > > > > > >> Gene, > >> > >> The problem is not with high quality RCA > connectors. It is with cheap connectors that are made from > metal that is too soft so it loosens up with just a little > movement. I'm sure the government didn't buy their > parts from Radio Shack. By far the greatest use of XLR is > for professional microphones. > >> > >> Len > >> > >> > >> On Jan 15, 2009, at 2:23 PM, grduprey@mchsi.com > wrote: > >> > >> > >>> A bit of info on RCA connectors: A properly > put together RCA connector will not go intermittent. As > simple as they are, it is hard to not put one together > correctly. The US Navy required them during WWII, and > Collins Radio used them all the time for their Ham Gear, > (Which by the way was also used by the US Government, and > others). My current installation has been up and running > for 8 years and no intermittents, and previously setup for > 13 years with no connection problems with RCA connectors. > By the way, all of my microphones, except one, use XLR > connectors, which are also quite good. > >>> > >>> > >>> Cheers, > >>> Gene > >>> > >>> -------------- Original message from Leonard > Taupier : -------------- > >>> > >>> > >>> > >>>> Hi Greg, > >>>> > >>>> When using the XLR inputs and outputs you > are using a balanced system > >>>> which should improve the signal to noise > and increase the signal > >>>> level by 3 db. Also RCA jacks are much > more likely to become > >>>> intermittent. XLR connections are superior > and are generally found on > >>>> more expensive equipment where audio > quality is the prime > >>>> consideration. Of course the cables > themselves can be very expensive > >>>> and can include filter networks to further > improve audio quality. Do > >>>> some research on the subject. > >>>> > >>>> Regards, > >>>> Len > >>>> > >>>> > >>>> > >>>> > >>>> On Jan 14, 2009, at 10:44 PM, Greg Lorenzo > wrote: > >>>> > >>>> > >>>>> I've got a new amplifier to > hook-up to a new pre-processor. I can > >>>>> connect the two together with either > RCA or XLR cables. > >>>>> > >>>>> Is there a noticeable benefit to > hooking these up with XLR cables > >>>>> rather then RCA jacks? > >>>>> > >>>>> The distance between both units is > approximately 4 feet. > >>>>> > >>>>> Greg Lorenzo > >>>>> Calgary, Canada > >>>>> > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more > information