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INCOL Twin Cord Speaker Cable Systems

Introduction: sound transmission between hi-fi amplifiers and speakers is always very critical for optimum performance. We have introduced a very dependable speaker cable for this purpose. This is with very high quality of copper and denser stranding than the common cable. With a harder jacket material can be installed very easily for any kind of fixed installation or for inside wiring of racks and speakers system.

Product Advantage:

1. Very Good Quality Reasonable Pricing
2. Very Flat And Easy To Install Due To The Memory Effect
3. The Plus Pole Has A Colored Identifying Strip.


1. As A Dependable Hi-Fi Cable With Durability
2. Inside Wiring Of Racks And Hi-Fi Speakers
3. Fixed Installation In Building Sound Studios.

Technical Data:

Jacket Transparent PVC

Outer Dimensions 6.5 x 3 mm 7.5 x 3.5 mm 7.8 x 3.6 mm 8.4 x 4.0 mm
No. of Conductors 2 x 23/36 SWG 2 x 40/36 SWG 2 x 1.00 mm2 2 x 2.00 mm2
Copper Strands Per Conductor 23 x 0.193 mm 40 x 0.193 mm 32 x 0.20 mm 70 x 0.193 mm

Selecting The Right Speaker Cable

The goal when using speaker cables is to keep them as short as possible. A rather lofty ideal, however, given the real demands of large facilities. Power amplifiers are in one location, power lines must be drawn and various other electrical systems for maintenance and safety are also in place. Economic considerations preclude splurging on the thicker, more expensive cabling. The following section describes an example for selecting speaker cables using the damping factor as the criterion.
The Damping factor is the damping effect on the speaker that is determined by power amplifier performance. It is expressed using the formula shown below.

Damping Factor =
Speaker impedance
Power amp. Output impedance + speaker cable conductor resistance

The greater the damping factors the better the ability to control the speaker and create sharp, clear quality in low range output.
As the formula shows, a high conductor resistance in the speaker cables the lower the damping factor, which prevents even quality amplifiers from performing at their best. When selecting cables, users should aim for a higher damping factor in the range of 20 to 50 for music facilities, and a lower factor of 10 to 20 for sports stadiums, where output is mainly speech.

Selecting Speaker Cable For Whole House Audio

There are many types of speaker cable on the market. Most are not suitable for whole house audio applications. We sell speaker cable designed specifically for in-wall wiring.

• Rated Cables
• Gauge Selection
• Power Loss Budget Table
• Speaker Cable Comparisons
• Purchasing Information

Rated Cables

When speaker cable is installed inside the walls, it is important to use cable that is rated for in-wall use. This is often referred to as premise wiring rated to as premise wiring rated. Most speaker cables sold for consumer use are not rated for premise wiring. There are two strong reasons for insisting on premise rated wiring. First, it complies with the National Electric Code. Second, It assures you the materials and the design of the cable meet well established standards for fire safety.

Gauge Selection

Because the impedance of loudspeakers is quite low, (usually 4 or 8 ohms ) the resistance of the cable feeding the speakers becomes quite relevant in determining how much power actually reaches the speaker. As an example, a hundred foot run of 16 AWG cable will have a round trip resistance of 0.8 ohms. If this is used to feed a 4 ohm speaker, approximately 17 percent of the power will be lost to the cable, and 83 percent will reach the speaker. Larger wire will reduce the power loss.

From a practical stand point, the wire sizes normally used for whole house audio speaker wiring are either 16 AWG or 14 AWG. These sizes provide a good compromise between line loss, cost, and ease of installation. Most of the equipment available for whole house audio systems have connection devices designed for these wire sizes. Going to a non-standard wire size can immensely increase the difficulty of installation.

Power Loss Budget Table

The Following speaker wire power loss budget table provides a guideline for selecting the right size speaker wire.

Speaker Wire Power Loss Budget Table
Select Speaker Impedance and maximum acceptable Loss, then look up maximum cable run distance.
Speaker Ohms Db Loss Power Loss 16 AWG Run in feet 14 AWG Run in feet
4 0.5 11% 60 100
4 1 21% 130 210
4 2 37% 290 460
4 3 50 500 790
8 0.5 11% 120 190
8 1 21% 260 410
8 2 37% 580 930
8 3 50% 990 1580

Selecting Speaker Cable For Whole House Audio- Home Tech

A 3db loss may seem like a lot, but since the ear has tremendous dynamic range, your probably won't notice that size loss and with the power of the amplifiers typically used, it is easy to overcome a 3db loss. There is another effect that you should consider. Some high end amplifiers have special speaker compensation circuits. Over the full range of frequencies handled by a speaker, it will perform better at some frequencies than others, some high end amplifiers sense the response characteristics of the speaker an automatically compensate for non-linear responses. This is sometimes called serving. When the resistance of the speaker wire is a significant part of the speaker impedance seen by the amplifier, it can impact the effectiveness of amplifiers compensation capabilities. For most amplifiers intended for whole house use, this is of little relevance.