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Biwiring and Cables, A couple of questions on how to
atici
post Feb 28 2003, 22:17
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I want to buy decent cables for my speakers and was wondering on how the setup should be.

The speakers in question (Infinity Alpha 40) is biwirable. My amp has two pairs of speaker outputs. In this case which one is a better idea: to use biwiring cables or use separate wires using both of the speaker outputs on my amp? If I use separate identical cables, does the length make difference?

And about the cable diameter, are the thick ones necessarily better? If so how much? I am planning to spend around $80 for my cabling. 7 feet cable for each channel is sufficient. Do you have any suggestions on quality but cheap cables? What do you think about the ones here?

Please let me know what you think. Your help is much appreciated.


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DigitalMan
post Mar 10 2003, 21:38
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QUOTE (atici @ Mar 10 2003 - 11:20 AM)
AFAIK It is not related to how good your amplifier works in high and low frequency, it is more about how these frequencies interfere on the wire to the speaker. Biwiring reduces this problem because high and low frequencies follow different paths based on Ohm's law (resistance for low and high frequencies are different at high and low connections of the speaker end). Therefore biwiring should always (in theory) increase the quality.

Lets be careful about the pseudoscientific rationalizations. When biwiring, you are connecting two sets of wire to the same outputs of your amplifier and then to different posts on your speakers (one for "higher frequencies" and one for "lower frequencies") on the other end.

Of course this could possibly make a difference in the sound/electrical signals: you are theoretically reducing resistance between the amp and speaker by doubling the cross sectional area of the conductors (2 wires vs. 1). However, you are also changing the capacitance and inducance of the circuit as well. All three elements play a key role in the signal transfer - heck, your passive crossovers in the speakers are made up of resistors, capacitors and inductors too. So to biwire simply to reduce resistance is to be (blissfully?) ignorant of what the capacitance and inductance are doing. It would be very difficult (impossible?) to say that biwiring is "always" better than single wiring. For all we know you are using highly capacitive cables that affect the stability of the amplifier and biwiring may make it worse. Or maybe the crossover is tuned in a way that happens to work better with single wiring - but that would also be hard to tell given manufacturing tolerances and the huge difference in the RCL (resistance, capacitance and inductance) of "speaker cables."

In any event, you would need to know the electrical paramaters of the speaker, amplifier and the cables to model what affect biwiring might have - everything else is wild speculation and pseudo-science. The next question is whether the affect would even be audible (have to do ABX test on that) and then the next question is whether the audible difference is "better" or just different.

If you want to reduce resistance, capacitance and inductance you could just try shorter speaker cables - hard to argue that less cable has less affect than more.

If you are looking for better sound you are better off spending time placing your speakers properly in the room and tuning the resonances / nulls of the room's acoustics (if you haven't already). Remember that room acoustics can cause 20dB frequency response variations routinely, especially at lower frequencies. Biwiring will not even begin to approach the impact of acoustics in your system - I would be surprised if it made a difference of more than 0.2dB at any frequency. Moving a speaker 10cm can have a measureable and audible affect in some situations. Better to invest in an SPL meter and some books on acoustics.

Having said all this, I once biwired my Mirage speakers because it looked really cool.


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Posts in this topic
- atici   Biwiring and Cables   Feb 28 2003, 22:17
- - Amadablam   http://home.earthlink.net/~rogerr7/wire.htm I can...   Feb 28 2003, 22:29
- - Dex4now   Hi Atici, you have to be careful about articles li...   Mar 10 2003, 02:41
- - gdougherty   "Audiophile grade" copper cable is bunk....   Mar 10 2003, 04:28
- - atici   Is thicker cable necessarily better? I got a 10 ga...   Mar 10 2003, 05:30
- - boojum   Doesn't Ohm's Law cover all of this? Buy ...   Mar 10 2003, 05:40
- - KikeG   Even biwiring is vodoo audio. From an electrical p...   Mar 10 2003, 09:04
- - Dex4now   QUOTE (gdougherty @ Mar 9 2003 - 07:28 PM)I p...   Mar 10 2003, 10:13
- - KikeG   QUOTE (Dex4now @ Mar 10 2003 - 10:13 AM)And, ...   Mar 10 2003, 10:26
- - Dibrom   QUOTE (Dex4now @ Mar 10 2003 - 02:13 AM)And, ...   Mar 10 2003, 11:21
- - LoKi128   I believe that there are some things in the audio ...   Mar 10 2003, 16:12
- - Bedeox   QUOTE (LoKi128 @ Mar 10 2003 - 07:12 AM)I bel...   Mar 10 2003, 17:28
- - LoKi128   ABX is a statistical method... it is a scientific ...   Mar 10 2003, 20:03
- - atici   QUOTE (LoKi128 @ Mar 10 2003 - 10:12 AM)Bi-wi...   Mar 10 2003, 20:20
- - Bedeox   But this difference is not hearable and is hardly ...   Mar 10 2003, 20:47
- - DigitalMan   QUOTE (atici @ Mar 10 2003 - 11:20 AM)AFAIK I...   Mar 10 2003, 21:38
- - Dex4now   Well, unfortunately, much of the criticism of my c...   Mar 11 2003, 00:37
- - lucpes   CODE1) single wire: preamp->amp-...   Mar 11 2003, 00:59
- - Dex4now   Hi lucpes, just so you know, Bi-amping and bi-wiri...   Mar 11 2003, 01:15
- - Annuka   Responding to original question: It has been my e...   Mar 11 2003, 01:36
- - Annuka   I'd like to add a comment: Audio is a physic...   Mar 11 2003, 01:53
- - DigitalMan   QUOTE (Annuka @ Mar 10 2003 - 04:36 PM)Connec...   Mar 11 2003, 01:57
- - lucpes   QUOTE (Dex4now @ Mar 11 2003 - 12:15 AM)...po...   Mar 11 2003, 04:15
- - lucpes   QUOTE (atici @ Mar 10 2003 - 07:20 PM)Biwirin...   Mar 11 2003, 04:18
- - KikeG   Oh man... biwiring is *useless*, has no sense from...   Mar 11 2003, 09:09
- - gdougherty   QUOTE (Annuka @ Mar 10 2003 - 06:36 PM)Respon...   Mar 11 2003, 09:31
- - KikeG   gdougherty, I agree on nearly everything: About i...   Mar 11 2003, 10:03
- - Pio2001   When a single 4 mm2 cable is used and a 1000 Hz si...   Mar 12 2003, 01:35
- - KikeG   QUOTE (Pio2001 @ Mar 12 2003 - 01:35 AM)Thus,...   Mar 12 2003, 09:01
- - Annuka   I studied electronics for a short while many years...   Mar 12 2003, 12:06
- - KikeG   QUOTE (Annuka @ Mar 12 2003 - 12:06 PM)But wh...   Mar 12 2003, 12:48
- - Annuka   QUOTE (KikeG @ Mar 12 2003 - 01:48 PM)Sorry, ...   Mar 12 2003, 14:44
- - KikeG   Well, when I call somebody an expert (which I don...   Mar 12 2003, 15:22
- - 2Bdecided   QUOTE (atici @ Feb 28 2003 - 09:17 PM)I want ...   Mar 12 2003, 15:37
- - 2Bdecided   QUOTE (Dex4now @ Mar 10 2003 - 01:41 AM)Hi At...   Mar 12 2003, 15:59
- - KikeG   Yep... I'm more of an objectivist, but I try n...   Mar 12 2003, 16:09
- - KikeG   By the way, I'm 100% of the opinion of that an...   Mar 12 2003, 16:24
- - DonP   QUOTE (DigitalMan @ Mar 10 2003 - 07:57 PM)[...   Mar 12 2003, 16:32
- - KikeG   But silver has a pay-off. It weights more than cop...   Mar 12 2003, 16:37
- - atici   QUOTE (2Bdecided @ Mar 12 2003 - 09:37 AM)The...   Mar 12 2003, 21:53
- - Dex4now   QUOTE (2Bdecided @ Mar 12 2003 - 06:59 AM)QUO...   Mar 12 2003, 23:27
- - KikeG   QUOTE (Dex4now @ Mar 12 2003 - 11:27 PM)I...   Mar 13 2003, 10:07
- - KikeG   Addition to my previous post: Note, I always talk...   Mar 13 2003, 10:15
- - 2Bdecided   QUOTE (KikeG @ Mar 12 2003 - 03:24 PM)By the ...   Mar 13 2003, 11:52
- - 2Bdecided   Sorry Dex - I didn't mean to offend, and I kno...   Mar 13 2003, 12:35
- - KikeG   @2Bdecided: QUOTE BUT it's not always trivial...   Mar 13 2003, 12:36
- - Daneel   QUOTE (Dex4now @ Mar 9 2003 - 05:41 PM)....Th...   Mar 13 2003, 13:43
- - Pio2001   I did the same calculus, though using the complete...   Mar 13 2003, 20:48
- - Dex4now   2Bdecided: As I look back at my post, the bold em...   Mar 13 2003, 23:47
- - KikeG   QUOTE (Dex4now @ Mar 13 2003 - 11:47 PM)The d...   Mar 14 2003, 09:03
- - gdougherty   QUOTE (Annuka @ Mar 12 2003 - 05:06 AM)Here i...   Mar 14 2003, 11:39
- - SometimesWarrior   QUOTE (gdougherty @ Mar 11 2003 - 12:31 AM)As...   Mar 14 2003, 12:03
- - gdougherty   QUOTE (Dex4now @ Mar 13 2003 - 04:47 PM)One o...   Mar 14 2003, 12:07
- - gdougherty   QUOTE (SometimesWarrior @ Mar 14 2003 - 05:03...   Mar 14 2003, 12:14
- - Pio2001   QUOTE (Dex4now @ Mar 14 2003 - 01:47 AM)whate...   Mar 15 2003, 00:01
- - Dex4now   QUOTE (KikeG @ Mar 14 2003 - 12:03 AM)QUOTE (...   Mar 15 2003, 02:48
- - Bedeox   QUOTE (gdougherty @ Mar 14 2003 - 03:07 AM)Ou...   Mar 15 2003, 17:16
- - Dex4now   C'mon Bedeox, you couldn't have meant that...   Mar 16 2003, 00:26
- - Pio2001   In HA, MP3 vs original, with measurable time smear...   Mar 16 2003, 00:32
- - LoKi128   QUOTE (Pio2001 @ Mar 15 2003 - 06:32 PM)And i...   Mar 16 2003, 00:57


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