DIYbanter - View Single Post - routing speaker cable in chipboard floors

tony sayer wrote:

In article . com,
writes

Dave Liquorice wrote:

On 19 Jul 2005 11:13:30 -0700, wrote:

Speaker use doesnt need anything particularly big.

IMHO anything with less than 2.5mm^2 CSA is to small.

20W into 4 ohms is over 2A... but it's not just the abilty to carry
the required current. The extra resistance reduces the damping on the
loudspeaker affecting the LF response.

Lets see.

Typical 8 ohm speaker, voice coil R typically 6 ohms.
5 meters of 2 core 1.29mm dia cu wire, tot 10m, 0.0128 ohm/metre, total
R 0.128 ohms.

Cable's R increase as a percentage of total speaker R: 2%.
Ie a non issue.

NT

Its not as simple as that. Take into account the effects of the
crossover unit in most all speakers and then post that to uk.rec.audio
and wait for the 1000 odd posts.

Crossover won't be hugely affected. Some nonlinearity of frequency
response but not maarked. The area of concern is the bass resonance -
particularly with bass reflex cabinets.

You could easily get a 6db difference at some frequencies.

Of course if its a bunch of ****e suround sound system with a separate
subwoofer, then fine. You can be less critical on the higher frequency
stuff...

They won't be long 'a coming....