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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: Another consideration – the cable lengthPosted by Romy the Cat on: 6/13/2010
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If I succeed to make my midbass horn at attic then I will face another problem that I do not know how to address at this point. The horns will be powered from Melquiades bass channels – it means it will use a good 70 feet speaker cable. If I go with Copper wire then it will have per foot:
4 ga - .000292
6 ga - .000465
8 ga - .000739
10 ga - .00118
12 ga - .00187
14 ga - .00297
Let presume that I will go for 12ga cable it means that I will have: 0. 00187 * 70 = 0.139R. This permanent impedance is a bit bothers me. It is not the impedance distributed in the secondary of the output transformer but it I impedance that voice coil get increased. This perm impedance only adds compression to the sound of driver. It is very possible that for my 16R driver the .1R will be negligible but who knows how much negligible is negligible. I am a bit afraid to go with thicker wire as it usually comes with less interesting upper bass – the sound feels like become “hollow”. Sure, it possible to get involved in the cabling wars then, and I am sure I will. What are the alternatives? To run a long line level interconnect and to put the amps on attic? To fire-dangers in my view… I was thinking to do it with fire sensor above the amps in attic and close circuit TV monitor but I kind of getting more complicated then I would like it to be…
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