Mr.
sleepwalker65
The answer is with the Damping Factor (DF) of your amplifier. There are some exceptions, if he speakers are not coil loaded (ribbon, electrostatic etc'.) or if the Amp. is a class-D type. But most, use a A-B class amp with ordinary speakers.
DF is defined as the ratio between the Amp's. output resistance (Ro, in Ohms) vs. an 8 ohms speaker, @ 1kHz.
As so, an Amp. with a DF of 500 has a Ro of 8/500=0.016 ohms.
The DF is given and you get it as you buy your Amp. It is used to be the higher the DF, the better is the Amp. Some use very stiff feedback to achive it - Not so good.
Others, may have tube amps. that have very low DF as low as 8!
The DF is actually the way the Amp. is getting control over the speaker's coil. A coil, especially a moving one in a magnetic field, generates an electric current that is equal to the one made it move, but in the opposite direction. It is called the "Lentz" law.
Speaker cables are in a way two resistors (Rc) that connect the power Amp. to the speaker. Why two? becuse the cables go to the speaker (red) and goes back (black) to the amplifier.
As so, the speaker's impedace has no significance in this electrical circuit.
The speaker cables resistance, just need to be significantly lower than the DF.
Other wise, the DF would decrease. So if the Rc = DF you actually have a 1/2 of the DF you paid for. This guy with his Bryston 4BSST2, with a DF of 500 is now enjoying an Amplifier equals to a poor reciever of the 70's with a DF of about 40!
In other words, he is maybe listening to less than 10% of his equipment's full potential.
The long (24') that would count as 2xRc, is actually equals to the resistance of a 48' long cable. A few more feet and you need transportation to go visit them! :-) Why so long?
A thick cable (4 AWG and thicker) is hard to make and would cost a lot. Rather than go that long with cables, it is better to get the amplifier closer, maybe use two monoblocks and guid a blanced interconnect (XLR) that can run up to 100m with no sound degradation, while cost's little.
The answer is with the Damping Factor (DF) of your amplifier. There are some exceptions, if he speakers are not coil loaded (ribbon, electrostatic etc'.) or if the Amp. is a class-D type. But most, use a A-B class amp with ordinary speakers.
DF is defined as the ratio between the Amp's. output resistance (Ro, in Ohms) vs. an 8 ohms speaker, @ 1kHz.
As so, an Amp. with a DF of 500 has a Ro of 8/500=0.016 ohms.
The DF is given and you get it as you buy your Amp. It is used to be the higher the DF, the better is the Amp. Some use very stiff feedback to achive it - Not so good.
Others, may have tube amps. that have very low DF as low as 8!
The DF is actually the way the Amp. is getting control over the speaker's coil. A coil, especially a moving one in a magnetic field, generates an electric current that is equal to the one made it move, but in the opposite direction. It is called the "Lentz" law.
Speaker cables are in a way two resistors (Rc) that connect the power Amp. to the speaker. Why two? becuse the cables go to the speaker (red) and goes back (black) to the amplifier.
As so, the speaker's impedace has no significance in this electrical circuit.
The speaker cables resistance, just need to be significantly lower than the DF.
Other wise, the DF would decrease. So if the Rc = DF you actually have a 1/2 of the DF you paid for. This guy with his Bryston 4BSST2, with a DF of 500 is now enjoying an Amplifier equals to a poor reciever of the 70's with a DF of about 40!
In other words, he is maybe listening to less than 10% of his equipment's full potential.
The long (24') that would count as 2xRc, is actually equals to the resistance of a 48' long cable. A few more feet and you need transportation to go visit them! :-) Why so long?
A thick cable (4 AWG and thicker) is hard to make and would cost a lot. Rather than go that long with cables, it is better to get the amplifier closer, maybe use two monoblocks and guid a blanced interconnect (XLR) that can run up to 100m with no sound degradation, while cost's little.