Go Back   Home > Forums > >

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

662g. Very low capacity star-quad speaker cables.
662g. Very low capacity star-quad speaker cables.
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools
Old 27th November 2020, 08:17 PM   #1
claudiogan is offline claudiogan  Italy
diyAudio Member
 
claudiogan's Avatar
 
Join Date: Apr 2011
Location: Sassari
Default 662g. Very low capacity star-quad speaker cables.

For some years I have been using self-built star-quad cables, I am satisfied and would like to know if anyone has tried similar cables.

The very low 30 pF / m capacitance makes the cable suitable even for amplifiers with low output currents. In the 662g cables the four conductors are connected to the + and - phases of the signal diagonally. They are kept approximately 25mm apart with plastic cross brackets. The capacitance between two conductors decreases with distance, even with some points where the cables approach the average capacitance remains at around 30 pF / m.

An aspect not considered of the speaker cables is that compared to the system they behave like the primary winding of a transformer. At 10 KHz the electromagnetic waves have a wavelength of about 10 Km and at the audio frequencies the whole audio system is subjected to the homogeneous flow of the magnetic field generated by the speaker cables. The star-quad configuration reduces the magnetic field generated by the current sent to the speakers and minimizes the chained flux with the amplifier circuits and signal cables. The possibility of unwanted feedback is reduced.

The cable is very cheap on page 662g you can find other photos to make a replica.
Attached Images
File Type: jpg 661g180r.jpg (176.1 KB, 62 views)
File Type: jpg 661g181r.jpg (113.9 KB, 63 views)

Last edited by claudiogan; 27th November 2020 at 08:23 PM.
  Reply With Quote
Old 27th November 2020, 09:09 PM   #2
Andersonix is offline Andersonix  Sweden
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Marin County, California
662g. Very low capacity star-quad speaker cables.
Very interesting way to avoid using that ugly word "inductance," however I much prefer capacitance over inductance. Or was that some more unwanted feedback?
  Reply With Quote
Old 27th November 2020, 09:40 PM   #3
claudiogan is offline claudiogan  Italy
diyAudio Member
 
claudiogan's Avatar
 
Join Date: Apr 2011
Location: Sassari
I made this 662g low-capacity cable after trying a three-phase, four-pole, high-capacity cable that sent my class D amplifier (Teac a-h01) into thermal protection.

I think speaker cables are to be considered antennas capable of disturbing the rest of the system and I chose the star-quad configuration which decreases the magnetic field flux in the listening room by at least an order of magnitude. The inductance in series of the cable is negligible compared to that of the voice coil of the speaker but unlike this it generates a magnetic flux even close to the amplifier terminals.

I have no measurements related to inductance or simulated model calculations.

Last edited by claudiogan; 27th November 2020 at 09:44 PM.
  Reply With Quote
Old 27th November 2020, 10:56 PM   #4
jneutron is offline jneutron  United States
diyAudio Member
 
jneutron's Avatar
 
Join Date: Jan 2004
Location: In fear
The magnetic field 10 conductor spacings away from the cable is gone. If the conductors are 2mm center to center, 2 centimeters out is clean.

Jn
__________________
I hate all these smart gadgets..I refuse to buy things that are smarter than me. I've made a list of those things... Cabbage just made the list.
  Reply With Quote
Old 28th November 2020, 11:12 AM   #5
claudiogan is offline claudiogan  Italy
diyAudio Member
 
claudiogan's Avatar
 
Join Date: Apr 2011
Location: Sassari
Quote:
Originally Posted by Andersonix View Post
... however I much prefer capacitance over inductance.
I opened this thread after reading part of Analysis of speaker cables. I couldn't figure out if my star-quad cable with spaced conductors is suitable for Hi-End systems, I use it with cheap components.

I have already read another time that a low inductance is more important than a low capacity. Now it is clearer to me. At audio frequencies, speaker cables can disturb other system components if the flux of the generated magnetic field is linked with other circuits. A low inductance measures low stored magnetic energy and minimizes the effects of magnetic field fluxes chained between two circuits.

One way to minimize inductance is to bring the conductors closer by increasing the capacity of the cable. The drawback of this choice is that the amplifier must be able to handle the extra power needed to charge and discharge the capacitor (cable).

On page 662g I will add the advice to use the star-quad cable connected to limited power amplifiers. The capacity of the star-quad cable is greatly reduced without excessively increasing the inductance. Sooner or later I will take measurements.
  Reply to this post

Reply


662g. Very low capacity star-quad speaker cables.Hide this!Advertise here!
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: 200' Canare 4S11 Star Quad Speaker Cable (4 x 14AWG) dimitri Swap Meet 0 25th July 2015 10:47 PM
FS:NOS 1954 Philips EL34 metal base quad 4 100% emission very rare quad EL34. ivershing Swap Meet 0 17th August 2012 03:07 PM
Canare L4E6S Star Quad Cables mudihan Swap Meet 0 8th August 2008 03:49 PM
Very very very small sub robomatique Subwoofers 13 25th January 2006 11:25 AM
speaker wiring vs. handling capacity barth2102 Full Range 18 4th December 2005 08:46 AM


New To Site? Need Help?

All times are GMT. The time now is 09:13 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki