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Topic # 228741 19-Jan-2018 21:37
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I'm interested to know whether connecting speakers to a stereo via a terminal block would cause any problems - in particular, degradation of sound quality.

 

The stereo in question is a 12V marine stereo being installed in my boat.

 

The sort of terminal block I'm referring to can be seen here

 

http://www.marinco.com/en/tb-118-10p

 

The blocks have very high conductivity and each pair of screw terminals is electrically and physically isolated.

 

This is a common approach in boat wiring.  Due to the amount of vibration, you need to mechanically support connections.  It allows connection of devices to supply circuits via secured ring terminals.

 

It also keeps wiring tidy, and makes replacing components easier.  This approach is use for powering devices and for communication bus systems like NMEA-0183.

 

But ... I don't know what it will do to speaker signals.  I'd appreciate any insight from people familiar with car audio systems.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 





Mike

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  Reply # 1943826 19-Jan-2018 22:21
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As long as you have a good connection (crimped and screwed firmly) then I can't see any problems

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  Reply # 1943846 20-Jan-2018 08:33
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Won't make any difference to speaker level audio.





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  Reply # 1943857 20-Jan-2018 09:37
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Its fine. 

 

What kinda of head unit and speakers are you using?

 

What else is on the chocolate block (said terminal block)? or will it just be audio. 

 

 

 

 

 

 




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  Reply # 1944000 20-Jan-2018 13:48
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Goosey:

 

What kinda of head unit and speakers are you using?

 

 

2 x GME 80W Marine Box Speakers (These ones)

 

Cheap 5" circular head unit (similar to this) - out put is 4 x 50W

 

Not a high end installation by any means.  Just enough for a bit of music when I'm not fishing.

 

Goosey:

 

What else is on the chocolate block (said terminal block)? or will it just be audio. 

 

 

Other 12v devices. For example VHF radio, LED lights, GPS/SONAR, power circuit for stereo.  

 

If it would make a significant difference I could use a separate terminal block just for the speakers or for the speakers and stereo-power.

 

I won't be able to fully isolate the stereo from other 12V devices because all devices share a common DC main lead via (+) and (-) bus-bars at the circuit breaker panel.





Mike

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  Reply # 1944064 20-Jan-2018 16:42
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MikeAqua:

Goosey:


What kinda of head unit and speakers are you using?



2 x GME 80W Marine Box Speakers (These ones)


Cheap 5" circular head unit (similar to this) - out put is 4 x 50W


Not a high end installation by any means.  Just enough for a bit of music when I'm not fishing.


Goosey:


What else is on the chocolate block (said terminal block)? or will it just be audio. 



Other 12v devices. For example VHF radio, LED lights, GPS/SONAR, power circuit for stereo.  


If it would make a significant difference I could use a separate terminal block just for the speakers or for the speakers and stereo-power.


I won't be able to fully isolate the stereo from other 12V devices because all devices share a common DC main lead via (+) and (-) bus-bars at the circuit breaker panel.



You will be fine. No need to over think it.
Your car radio shares a similar set up to quote an example.

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