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

b4icu,

I have been following this thread and accepted your reluctance to reveal the formula you have.

However, looking at responses and recommendations, I noticed some patterns and came up with a few conclusions.

Getting a thicker cable than necessary minimum may not improve the sound, but will not be detrimental either. It will be more expensive because thicker cables tend to be so.

Cables that posters who reported improvement following your recommendations used are, overall, quite affordable when talking about audio equipment. Altogether, $100-200 for runs of a few meters. Definitely much cheaper than "real" audio cables.

Your recommendations seem to be, in most cases, limited to, at largest, 0 AWG. That seems to be enough for most of the users, unless they are running 20 meters of cable which many are probably not.

Is it safe to assume that most of the users who are using maybe 2-3-4 meter cables and are not concerned about the difference of a $50-100 between minimally necessary (let's say AWG 4) and AWG 0 would be sufficiently served by simply buying AWG 0? That would eliminate your formula and need to bother you with calculations while giving some inexpensive window where thickness is enough, if not more than enough.

One of the posters published pictures of his new cable. It is quite thick (I forgot actual numbers) and has much thinner and very short one embedded at the end with that thinner one being attached to a banana which then goes in the amplifier. If there is a need for a very thick cable, does this thinner piece negate the benefits of all the thickness before it?

If my assumptions are correct, for most of the posters, the actual focus would need to shift on technical aspect of constructing a usable cable rather than on how thick the cable should be. AWG 0 would suffice in most cases and would not cost too much. More difficult question would be how to connect to speakers and amplifier.

Mr. glupson

Thanks. For an educated summery and for bringing this thread back to a civilized conversation. This mod wrestling with the industry hidden representative is so wrong.

I try to avoid a "one cable solution for all" as it is not the right engineering approach. Even your 2-3-4 suggestion is not proper. A 4m long cable must be of the double the cross section of a 2m long, to keep the same resistance. On the gauge table it is like going from 1 AWG to 5 AWG! The 2m would be a 3 AWG etc'. For those who cannot do with a short cable, and they must use a long one, the cable will get thicker. It easily can get as thick as 4x 0 AWG at some lengths.

I said loud and clear that the cable resistance is up to the amplifier (some speakers might be different, but most apply to the say: No matter what speaker you are using!). Different amplifiers would imply different cables thickness, even if we stick to a short 2.5m length.

Tube amplifiers have such a low DF that a home phone cords would do. As the DF rise, so gets the cable thicker (lower the AWG). When DF is 150 the cable you need is different than when the DF is 500 or even higher.

Some D class amplification, have extremely high DFs to exceed 5000! The more practical way to relate that (by the Amp designer help) is to say the actual DF is 1000. Still a relatively very high figure.

I'm not sure that the DIY is a solution for everyone. My friend in Vancouver, even I've told him everything he needed, he asked me to make him the cable. He was willing to pay me for the expanses and labor. I charged him only for my expanses.

I will repeat that it is difficult to work with such thick cables. I've been in that movie. My embracing for all cable's ending is a banana plugs. Spades are not as good, and so is the bare wire (not practical for an 8 AWG or thicker). I'm aware that some binding posts cannot have banana plugs!

The way to go from a 0 AWG cable to a banana plug, is with a short wire that will fit the banana plug and then to connect it to the thick cable. This wire shall be as thick as possible and so as short. It shall still have some length to enable the cable's strain relief. A 0 AWG cable is stiff. It is recommended to use a crimping method and not soldering. The entire end shall be protected and isolated with some shrinking sleeve. The cable must be reliable and last long. It also must be safe to use and never risk your equipment.

I do not think that the cable or the banana plug needs to be expensive or get into the definition of hi-end. This say piss's me off, as the 12-14 AWG ordinary cables on the market, are practically limiting a good sound system by 50%-80%. They still sold for a lot and called hi-end. A bit awkward. What wouldn't the maker say to get it sold for more $. I'd found that some materials are better to work with over others and do the job as well or better. So I gave up the obsession on the say and criticism, over practicality and good compliance to the engineering requirements.

So far, I didn't say much over the DIY solutions that some members of this forum came up with. They were creative and their cables do the job. They also ended up with extremely low cost. They might have some reliability problems on the long run. How your presidents say: "We will see. Something will happen". I assume that the average sound systems involved were of $10,000 range. A $60 cable cost is respectably amazingly low. From the comments of the difference in sound, the VFM is outstanding. You know the audio market. No one can upgrade that much a $10,000.- system for a $60.- investment. The only way to get better than that (VFM) is to place better the speakers. But that is a shame on who didn't done that already (-: Another way is to drink a nice glass of wine (-: