sydsfloyd67
Contributor
I understand that those few preamps that have an "inverted' pair of outputs in addition to the normal set can be used to bridge any two amplifiers (first item below).
I had not heard the following claim from Yamaha -that using the invert outputs, and reversing one speakers phase, can afford some benefit to the amplifier's power supply. Does this make sense to any of you technically minded guys? -sf
_____________________
"The PRE OUT NORMAL & PREOUT INVERT terminals are a versatile feature of the C-70.
- When using a separate power amplifier for each channel, the alternate hookup permits the use of ordinary stereo amplifiers (without the "BTL" feature) to be operated monaurally, a unique feature of the C-70.
- The bass response of many power amplifiers is limited by power supply capacity. When a strong bass note enters the amplifier's left and right channels simultaneously, the fact that the two signals are in phase means that the total demands for power may exceed the capacity of the supply. The C-70's unique PRE OUT INVERT jacks can be used to solve this problem. The left and right channels of the power amp are operated out of phase, greatly reducing the demands of low frequency signals on the power supply. This can dramatically improve bass reproduction on many power amps.
Note that it is necessary to reverse connections to one speaker to preserve proper phase.
___________________________
I had not heard the following claim from Yamaha -that using the invert outputs, and reversing one speakers phase, can afford some benefit to the amplifier's power supply. Does this make sense to any of you technically minded guys? -sf
_____________________
"The PRE OUT NORMAL & PREOUT INVERT terminals are a versatile feature of the C-70.
- When using a separate power amplifier for each channel, the alternate hookup permits the use of ordinary stereo amplifiers (without the "BTL" feature) to be operated monaurally, a unique feature of the C-70.
- The bass response of many power amplifiers is limited by power supply capacity. When a strong bass note enters the amplifier's left and right channels simultaneously, the fact that the two signals are in phase means that the total demands for power may exceed the capacity of the supply. The C-70's unique PRE OUT INVERT jacks can be used to solve this problem. The left and right channels of the power amp are operated out of phase, greatly reducing the demands of low frequency signals on the power supply. This can dramatically improve bass reproduction on many power amps.
Note that it is necessary to reverse connections to one speaker to preserve proper phase.
___________________________