QUOTE(sonerin @ Aug 15 2016, 03:29 PM)
It depend on who is answering you. Some believe in cables and some don't. I am sure there are a lot of clever people in this forum will reply differently.
Anyway, below are my answer to your question - inline.
1) Does it matter if the speakers cable is not of equal length?
Yes it does. Obviously shorter cable will have signal travel faster than the longer cable.
2) Does YPAO adjust for delays due to this difference?
Yes it does to compensate.
3) While I think for this length of 2m vs 0.6m it would be impossible to hear the delays (if any), does this means that if I'm using Straight or PureDirect mode the compensation done by YPOA (delays and levels) will not be applied?
In any mode you use, as long as you apply the YPAO it will do what is suppose to do to make the sound right as per the auto calibration. As for if you can hear delay, that is what I have answer in no. 1
4) Also does having less resistance means saving electricity as well as putting less stress on the AVR?
less resistance does not mean saving electric but yes less stress for the AVR.
5) For surround speakers, does it means that you can get away with thinner wires? I asks since most would ask whether the cables is for front or surround and that the original cables for the surround is much thinner than the fronts.
Well, in HT center speaker is the most important that follow by sub and than front speakers. The least important speakers are the surround. So that is why some choose to sacrifice a bit for surround to compensate for budget. Of course if all cables can be the same for all speakers will be great.
Hope this helps.
It definitely helped.
On point
4) Do you know how much output power is reduced by setting my RX-V679 on Econo mode? I always wondered if and when I have under powered my speakers. The manual is not very helpful by saying something like 'if you hear weird sound, try turn off Econo mode'. I usually set the volume between -40dB to -20dB.
5) And talking about sacrifice, I currently use what people call 'junk' for my surround but I'm pretty happy for HT purposes. Would it be worthwhile to change to something better in the RM1k/pair range if I listen to surround music? Not sure if I'm missing out on anything.
QUOTE(SSJBen @ Aug 15 2016, 03:47 PM)
Cable voodoo out of the way, let's talk logic;
1) In theory, at least for home theater runs; no it does not matter. Electric travels at the speed of light, a difference of 1.4m isn't going to make a snort of a difference provided both runs are the
exact same cable.
2) YPAO adjusts delay in relevance to where the mic is position at (MLP), not the cable.
3) If you were to use an oscillator and measure the conductance of 2 cables with different lengths and of different quality, then yes it is measurable that the difference in length can and will show a difference in conductance. Whether that is audible or not, well.. it shouldn't be, but we have people who can hear the difference between cheap tin solder vs rosin solder used on the cable end.
Straight uses YPAO processing and adjustments, Pure Direct doesn't. They're not relative to each other.
4) Again, if you were to take oscillator and measure; you will see a difference. But the difference is so minute that it doesn't actually matter.
5) Logically speaking, the farther your cables are from the amp/receiver, the thicker of a gauge you want for the cable. But we will reach a point (around 10 gauge) where any thicker doesn't provide any more benefit unless you have a room as big as Michael Bay's own home cinema.
People place all their cable budget on the main speakers (LCR) because
apparently, the cables will make a huge difference because the mains are the important speakers.

Sidenote;
As to why YPAO set one side of your speaker louder than the other, there can be various factors.
Example;
- Difference in noise level within surrounding environment, are you absolutely sure that prior to the YPAO measurement after you switched cables that your environment's noise level was the SAME?
- Did you verify the SPL with an SPL meter at least, not just by going off the reading on the receiver?
- Was the mic in the exact same position before and after you change the cables?
Thanks for your reply.
On point 2) with different length cables, wouldn't the signal arrive at the speakers at different time hence generating the sound later and causes the mic to pick it up later. Wouldn't that translate into longer distance? But in my case the effect is probably irrelevant. Just asking since it seems logical.
I was actually trying to see if there is any difference in performance between the cables by doing the extreme by using the 4m @ 3 ohms original cable vs 0.6m wireman cables. The test results is consistent from day 1 and I test at midnight when everyone is asleep. After cutting to length, the difference is only -0.5dB mostly, sometimes 0dB. Doubt I could hear the difference.
I'll try to get a SPL if I can, I think somewhere in my office have it.
QUOTE(jamesleetech @ Aug 15 2016, 05:09 PM)
I don't know how to answer your question because any answer from me may cause further replies of disagreement to my poor knowledge of speaker, interconnect or whatever cables. So I do feel that it makes more sense for me to just post a few articles and videos that I have read and watched before. I hope I do not cause further confusion to you as well as be able to help you make a much better choice.
http://www.audioholics.com/audio-video-cab...ker-cable-gaugehttp://machinedesign.com/blog/5-myths-about-speaker-wirehttp://www.prosoundweb.com/article/tech_ti...re_gauge_right/http://www.cablecurls.com/cable-curls/cabl...-speaker-cable/https://www.youtube.com/watch?v=lG-3KyURXqkhttps://www.youtube.com/watch?v=r7DdcZCbABohttps://www.youtube.com/watch?v=RR4crLxpd4UI think that speaker cables selection can cause "heated discussions" between different camps, similar to the question of HDMI cables and other cables.
My own uneducated opinion is... get a cable which you think is supposed to be reasonable AWG thickness for the length used (refer to the links I posted above) AND do make sure that the speaker cables have proper shielding because electro-magnetic interference (EMI) can cause some problems... and of course, I know that you will not put your speaker cables near to any electrical wires or anything that can cause EMI issues. Don't worry too much about not equal length of speaker cables... just use equal lengths for left and right speakers since its DIY so the costs of saving a few Ringgit for just a short length will not matter. Branded (factory terminated) expensive ones ALWAYS come with equal lengths so that is never an issue. I sensed bullets being fired at me now or am I just hallucinating?
Below is an interesting YouTube Video about cable curls ...
https://www.youtube.com/watch?v=6duVvwdd5F0Phew! Tough, tough.
Thanks for the links, it was interesting.
I think the most difficult part about getting cables is that you could not judge its quality simply by looking or even what is written in the specs with possible fakes around.
QUOTE(ktek @ Aug 15 2016, 05:54 PM)
electric cable is litz type (7, 16, 24 core).
spk cable is stranded (many fine core)
has tried qed xt300 vs local ayam vs electric cable.
give difference in high frequency response
Ya those cables, I think mine is the 7 core.
QUOTE(sonerin @ Aug 15 2016, 07:07 PM)
What ever you read on Internet is just something good to know. Is always good to try out yourself to experience it. The more you read the more you will confuse. Is better to trust your ear
I'll love to try everything if possible without spending a single cent, well maybe spending a reasonable amount. Anybody actually tried buying 2 sets of cables and return one after testing? A bit hard for me to try when I needed 30m of cables in total.
Trusting your ear makes you feel good, but then again our brain is known to lie about what our sensory organs tells it.
QUOTE(sherr127 @ Aug 15 2016, 09:43 PM)
You like to read base on logic and scientific data?Read here :
http://www.roger-russell.com/wire/wire.htmFriendly reminder; dont trust your ears to differentiate sounds between cables,your ears will lie..science wont..its called placebo effect,unless you do blind test and i've done many..
Thanks for the info. Its a wonder how most product is engineered by manipulating our sensors, like how motion picture film works.