Bi Wiring Speakers from Luxman L-509X

The only downside is the cost of the extra speaker wires. The upside is highly debated, but experimenting is always fun. 

The low and high pass filters means the multiple drivers are not not seen in parallel by the amplifier. They are seen as separate entities.

For a better view to understand this, please see my post here:

https://speakermakersjourney.blogspot.com/2016/12/crossover-basics-impedance.html

My original statement, that using the A+B outputs to bi-wire a speaker is equivalent to using just A or B stands. The amplifier won’t know the difference and hopefully you’ll see the explanation in the post.

Using simple, DC analysis for equivalent resistances is not appropriate in this case.  It would work (with a lot of slop) with parallel drivers of the same type in the same section, like having 2 woofers for instance. 

The high pass crossover has high impedance at low frequencies and the low pass crossover has high impedance at high frequencies.
So " - to -, and + to +" basically still = 8 ohms.

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imhififan, Erik is correct you are NOT

Measure a static load at the speaker terminal, not the driver. The amp sees that. The crossover may well have all kind of thing to add resistance to circuit, you still add the combine resistance in THAT circuit..

If you have two separate circuits ( lows and mid/high), no matter in a series or parallel crossover design, the law of 1/2 the total or the combined total still stands.

(If the lows are wired at 8 ohms and the mid/highs are wired at 8 ohms)

No, it's 4 ohms just like I said in parallel.  In series it's 16 ohms. (16 won't work, it is an example) The crossover can't work in series because of the way the signal would be passed from low to mid/high or vice versa. The load would still be 16 ohm load, the speaker wouldn't work correctly..

- to -, + to + (parallel) = 1/2 the combined total

- to + to - to + (series) = add the two together

Split the load between two different amps the amps sees 8 ohms ea.

If the highs are @ 8 ohm and the lows are at 8 ohm.

At least the 2-220 crossovers that I've repaired or built.. Maybe you got a different DMM LOL, people still amaze me..

Regards

you have convinced yourself; am I overthinking it? stand out to me.

https://www.audioadvice.com/videos-reviews/speaker-bi-wiring-bi-amping-explained/

what speakers?

note: these units, 2 pairs of speakers is not for bi-wiring, rather different spaces. the amp's power for each pair must be effected, there may be microseconds of timing delay, ...?

note: your Luxman unit specifically: the speaker's impedance restriction 8-16 ohm load if two pairs; 4-16 ohms if only one pair shown on the back of the amp. that indicates it cannot safely (within warranty) provide full power when both pairs driven. 

Lots of great input which I expected.

To answer one comment above, the primary reason for this question at all is cost. Two full pairs of cables is more expensive than one. At this expense I don’t want to get down the road and find it was not a good fit.

The plan is to get two sets with locking banana connectors. If I need to run them off of one set of speaker outputs on the amp then I would have to consider one set with bananas and one set with spades to allow both sets to connect to the same binding posts.

The speakers are rated at 4ohms. This presumes the woofer runs at 8 ohms and the mid/tweets run at 8 ohms to provide a combined 4 ohm load. Is this correct math?

So if the four 8 ohm driver circuits are connected to the two pairs of speaker outputs am I within the 8-16ohm limits when all four speaker terminals are connected?This, and Elliot’s comment above, is what I’m trying to sort out.

I believe I’m OK. Is this right?