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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

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Old 25th March 2020, 05:38 PM   #1
twocents is offline twocents  South Africa
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Default Line level / interconnect cable – maximum length and what cable?

A family member asked me if they can play their TV audio over the hifi. Sure - that’s easy with an interconnect cable from the TV audio out headphone jack to the line-in RCA on the Marantz amp, right? Only caveat – this cable needs to be 15 meters (about 50 feet) long if routed to satisfy WAF. Is this feasible at all and what kind of cable do I use?
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Old 25th March 2020, 09:20 PM   #2
Mark Tillotson is offline Mark Tillotson
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Headphone jack ought to be able to drive a long cable as its a low impedance source.

Something like this is the sort of cable. White jacketed should also be available which is better for routing round a house discreetly Loops 50m Twin Screened Audio Cable - Shotgun Dual Twin: Amazon.co.uk: Electronics
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Old 25th March 2020, 10:47 PM   #3
MAAC0 is offline MAAC0  Portugal
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I remember seeing some time ago this kind of kits on computer stores comprising a Svideo / Yellow RCA and a standard Stereo RCA cable and indeed they were 10-15m long.
You could however try it with video senders. A video sender can transmit digital spdif signals connecting the signal to the yellow RCA. Trust me. I've tried it with a standard 2.4GHz sender.
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Old 26th March 2020, 12:58 PM   #4
Speedskater is offline Speedskater  United States
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Yes a good RCA output stage or headphone jack should be able to drive a 50 foot interconnect. Chose a coax cable with a heavy braided shield.
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Old 26th March 2020, 01:37 PM   #5
mchambin is offline mchambin  France
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Try lamp cord.
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Old 26th March 2020, 02:57 PM   #6
twocents is offline twocents  South Africa
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Great. Thank you for all the replies - I will go ahead and try this. Hopefully the family has some kind of reward planned if it works well.
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Old 28th March 2020, 02:08 AM   #7
PRR is offline PRR  United States
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I have done that, over 150 feet, with 50 feet of cheap speaker wire at the end.
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