No one actually knows how to lculate what speaker cable they need

b4icu, I’m sorry you have been subjected to such rudeness on this thread. There are certainly much kinder and gentler ways to disagree with somebody over their ideas. Also, and nothing to do with speaker cables, I did enjoy your aside about your daughter’s military service. You must be very proud of them.

I am new to the field of high end audio wiring and am trying to learn about it. I have recently purchased two new speakers, Magico A3’s, to be delivered in February, and a new amplifier, a Luxman L-507uXII, I’ll be picking up this week.

The Magico A3’s will be located 4-5 feet to either side of the amplifier. The wires will also have to travel about another 3-4 feet to get to the height of the Luxman amplifier off the floor and then behind it to the amps connectors. Worst case scenario, maybe ten feet of cable to each speaker will be needed. The Luxman has a listed damping factor of 260 . The Magico’s are rated at 4 ohms impedance, if that has any relevance.

What would you recommend for sizing and creating speaker cables in this instance? And what might you guess or estimate it might cost to create them as you’ve described? If there is any other information you need, please let me know and I will obtain it for you. Thank you for offering your assistance to Audiogon’s readership.

Michael

Mr.  grannyring

The Lyngdorf 2170 is a digital Amp. par excellence! those usually come with high DF. Very high...(theoretically something like 5,000!) on other posts (private one) an other maker would recommend of an equivalent DF of 1,000. However you've been told that it has a DF of 100. It is a 10x ratio difference!
As so, I would go for your cables in two options that you will have to make up your mind, and take a decision of which one you like to believe to

 
For 20 ft long:
For a DF of 100 it would be a 1 AWG (I would take a 0 AWG that is more popular to find and work with)
For a DF 1,000 it would be a 4x 0 AWG in parallel, or 2x 4/0 (0000) AWG in parallel. This is a very thick and heavy cable.
The set would be over 40Lb. I doubt if you can do a DIY cable of such size.

If the 100 is your choice, and the real DF is more like a 1,000, you are still at enjoying only 50% of your system. If your choice is the 1,000 whatever the trouble to get it, you will end up with the right cable, of way more (not really required) and expensive cable. Up to you!

Mr. skyscraper

Nice system.

The Luxman L-507uXII has a DF of 260: http://www.luxman.com/product/detail.php?id=4

For your 10ft. length it is between 1 AWG and 2 AWG. You may adopt one of the 0 AWG DIY that was brought up along this thread (parts source and labor methodes).

I know in person Mr. Yair Tamam a major designer of the Magico speaker. https://magico.net/redefine/redefine.php

For some reason he is not mentioned on this site. (Mr.) Alon is an Israeli name and they have a dealer in Israel too. I know that they earned over night a great reputation with their speakers. On my 3rd seminar held here in Israel, Mr. Tamam lectured on his vision of building a speaker…it was in 2001.

Mr.  conradnash
Please be kind to take your Bi wire subject with Mr. 
geoffkait who keeps posting on the subject (none relevant to this thread) to another place. Thanks.

Thank you for your assistance. You are fortunate to be acquainted with individuals in your field such as Mr. Taman. Must make for interesting company. I have nothing but respect for individuals having achieved that level of expertise. It doesn't come easy. Take care now,  

Michael