A set 2-way Audio Note loudspeakers came with a set of double coax cables for each channel. So, a separate coax cable for signal and return.
See attached picture.
Can you please think aloud - or even talk from experience - on why this may be useful?
Please, PLEASE no flame on that cables do not matter.
See attached picture.
Can you please think aloud - or even talk from experience - on why this may be useful?
Please, PLEASE no flame on that cables do not matter.
Attachments
av, one reason I can think of is that the builder wanted to screen both connections from RF/EMI.
I think a case could be made for that.
Probably more effective with long leads.
Jan
I think a case could be made for that.
Probably more effective with long leads.
Jan
Probably for aesthetic reasons.
No need to screen speaker leads. Signal leads before a pre amp yes but high current low voltage lines, no.
RF/EMI is normally mains borne and that will be taken care of with the power supply. Input connections, if susceptible, will have ferrite beads in place.
Or the owner has too much money to throw away.
No need to screen speaker leads. Signal leads before a pre amp yes but high current low voltage lines, no.
RF/EMI is normally mains borne and that will be taken care of with the power supply. Input connections, if susceptible, will have ferrite beads in place.
Or the owner has too much money to throw away.
Class-D amplifiers can (and do) create rf interference - and the speaker leads can act as antennas.
Far better would be shielded twisted-pair leads (i.e. 2 conductors covered by a grounded screen), but I suppose this is a decent second best.
(Most class-D amplifiers have bridged (i.e. differential) outputs, I think.)
Far better would be shielded twisted-pair leads (i.e. 2 conductors covered by a grounded screen), but I suppose this is a decent second best.
(Most class-D amplifiers have bridged (i.e. differential) outputs, I think.)
I've had an Allen S100 amp pick up & play AM radio with 16' zip cord speaker cable even though it had a ferrite bead in the output. Sports talk radio in the service if the organist wasn't playing. 10 turns wire around a 1 ohm 10 w wirewound resistor (parallel) mounted inside chassis behind the speaker terminals killed it. Church was 1.5 miles from the 5000 W AM radio station.
Is only the center conductor connected to the driver and the input? Maybe I'm not picturing this right, but for the shielding to work doesn't it need to be grounded?