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Terminal Blocks for Speaker Wire "Splitting"?

Background: I have a "mid-fi" stereo system in a 25x15 ft relatively well damped living room as follows: Yamaha R-S700 receiver, four Paradigm Atom V3 small bookshelf speakers in the corners (using A and B outputs) and an SVS PB-1000 powered subwoofer. The Yamaha has been known to blow a couple of Atoms when mishandled. Because of that and for nostalgic reasons I will be replacing it with a much lower powered vintage NAD 3020, which only has one set of speaker outputs and of course no subwoofer output.
The PB-1000 can be driven by L+R speaker level signals which it uses as low level inputs with high impedance. So, I need to split the speaker outputs into 3 sets (front, rear and sub). The NAD terminal posts are quite fragile and I do not want to jam more than one wire into each. I am using 12 and 14 AWG speaker cables.I am keen on decent sound but accept the limitations of the above equipment (have a much better system elsewhere).
So, to my question: Is there any objection to distribute the speaker signals through a pair of dual row 15A or 25A terminal blocks (L & R) and jumpers such as here:
https://www.amazon.com/dp/B07CLY5N9T/?coliid=IZTS4LPO2PS4X&colid=16XMVSQMO7S0V&psc=1&ref......
or even 45A ones such as here:
https://www.amazon.com/dp/B07DM83GZ5/?coliid=I1P22GXS9SOQ9Z&colid=16XMVSQMO7S0V&psc=1&re...
I would use 8 mm spades such as these:
https://www.amazon.com/dp/B009KSNVHM/?coliid=IB0RJN70IPBX2&colid=16XMVSQMO7S0V&psc=1&ref...
Would sound quality be negatively affected due to this signal distribution hardware or any other concerns?
Thanks!
yoramguy1

Showing 3 responses by yoramguy1

yoramguy1 OP
69 posts
 
spatialking, thanks a lot for your feedback and advice. Yes, the 45A terminal blocks accommodate well the 8 mm post spades I intend to use, the smaller 15A and 25A ones don’t. Only problem with the 45A ones is I can’t find jumpers to distribute the signals to the other poles, like the red and black ones that come with the smaller blocks. Is the sound quality you experience good enough for "mid-" or "near-hifi"? My concern is more with capacitance and inductance effects on the impedance than simple resistance - any insights into this? Thanks again!-Yoram
yoramguy1 OP
69 posts
 
@spatialking , thank you very much for this!!  Will pursue further. Another option I'm considering is building my own little "junction box" with all spades of each of the four signals (L+, L-, R+, R-) stacked together with copper washers between them on a 8mm nylon 6/6 or fiberglass bolt (anchored in a wood base) and clamped with nylon or fiberglass nuts.  This should minimize inductance but not sure whether it would reduce the capacitance over the industrial 45A box. 
I know all this sounds weird if not crazy but looks like the best solution to me... 
Critique (including of my own sanity) is welcome.
yoramguy1 OP
69 posts
 
@spatialking , many belated thanks for this excellent guidance which I have actually applied in my solution, and shame on me and apologies for failing to acknowledge and thank you until now.
I ended up using four 5/16" fiberglass bolts, one bolt per line (L+, L-, R+, R-) anchored on a flat PVC bar, and at each bolt a nylon bushing at bottom and a fiberglass nut on top clamping a stack of four spades (amp output and 3 speaker feeds) for that line. Used 1 mm thick copper washers between the spades to ensure contact area. 
I believe this approach minimizes inductance (as well as capacitance).The result sounds very good to my ears. Thanks again!!
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