Balanced versus single ended


From my experience, every situation that had both options, the balanced connection and/or increased gain sounded better, regardless of the bolume knob’s final position. More detail , air, emotional connection etc. The single ended cables used were good, not the bargain or so called high end extreme.

Sometimes using balanced or xlr it involved just the source, but optimally it carried through thd entire chain.

Anyways, my question is: has anyone ever thought that single ended sounded better?given the 2 options. Im only referring to a truly balanced connection.

I ask, because a manufacturer who makes tube amps, recommends single over balanced connection. Is there something else involved in this decision, additional parts or labor complexity? Is the signal path extended?

Thanks in advance

 

recluse

Showing 8 responses by ditusa

@holmz,

does cable create the conformance to the AES48 standard?
or…
the electronics that it plugs into?

They both do! 😁

Mike

 

A fully compliant AES 48 installation with good cables will always measure better than a non-balanced RCA installation. Regardless of line-length, noise rejection and other cable artefacts and earth separation will be better. In theory, it should sound better - in my experience it does.

I agree!

Mike

Good read see below:

https://www.ranecommercial.com/kb_article.php?article=2107

 

 

@zlone,

My components say they are balanced, but how does one really know if they are built to the AES standard? I have never seen this mentioned in the specs.

Call the manufacturer and ask if their audio components are AES48 compliant.

 

Mike

@zlone,

The wiring diagram below shows the correct way to make balanced cables compliant to the AES48 standard.

 

The Absolute Best Right Way To Do It

The method specified by AES48 is to use balanced lines and tie the cable shield to the metal chassis (right where it enters the chassis) at both ends of the cable.

The absolute best way to wire audio cables

 

https://usermanual.wiki/Document/ShieldWiringOfBalancedInputsAndOutputsAes482005F.2144015621.pdf

@zlone,

Interesting. Are you saying that both amplifiers and cables that are billed as balanced might not be to standard?

Yes, that has been my experience. See @atmasphere wrote on a good post thoroughly explaining that. Also see related article below: Rane Sound System Interconnection

Mike

https://www.ranecommercial.com/kb_article.php?article=2107

I thought this newsletter below was perfect for this post but no mention of the AES48 standard.

Mike

The Audio Classics’ Newsletter

The Audio Classics’ Newsletter

Greetings!

Balanced vs Unbalanced Cables

Introduction

So what’s the big deal about balanced lines? The answer is that they allow audio signals, even very low level audio signals, to be sent hundreds of feet with little risk of electrical interference.

 

Specific Differences

Unbalanced Lines

 

An unbalanced line is made up of two conductors: a single insulated center conductor surrounded by a braided or foil shield.

 

The shield is connected to earth ground. The signal is carried by both the shield and center conductor. The theory is that extraneous signals will be routed by the shield to earth ground so they will not reach the center conductor to interfere with the signal. Unfortunately this theory does not always hold up. With unbalanced lines longer than a few feet, the exposure to interference becomes more likely and the result is that hum or other noise can get into the center conductor and then be passed along to the rest of the system.

 

RCA connectors are used on unbalanced lines.

 

Since the shield is at one potential (ground) and the center conductor is at a different potential, the line is said to be ’unbalanced’.

 

As a rule of thumb, use unbalanced lines only in short lengths, up to 15 feet or so.

 

Balanced Lines

A balanced line is made up of three conductors: two separate conductors in the center surrounded by a braided or foil shield.

 

As in unbalanced lines, the shield is connected to earth ground. In balanced lines, the signal is carried by the two conductors inside the shield (but not the shield itself). The theory is a little more complicated. As above, the purpose of the shield is to route extraneous signals to ground so they won’t interfere with the signal circuit. But there’s more. Since the two conductors are part of the same circuit, they carry the same voltage and current but in opposite directions. Any interference that does permeate the shield will affect both center conductors in the same way. Since the current in the two conductors is in opposite directions, the interference is cancelled out. The signal is not affected.

 

XLR connectors are used on balanced lines.

 

 

Since the two conductors within the shield are at the same potential in relation to earth ground, the line is said to be ’balanced’.

 

As a rule of thumb, use balanced lines for any length and whenever you can, but particularly for lines longer than 15 feet or so in length.

 

— by Tom DeForest

 

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The construction quality of McIntosh audio cables has to be of the highest order since they are built to match the renowned longevity of McIntosh products.

 

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Starting with better electronics seems like a better value than “spicing to flavour” with cables.

I agree!