![The Importance of High Current](/images/new-backgrounds/26845/268457x1.webp)
High Current Amplification Achieves Low Impedance/ High Current Power from Input to Output.
The Importance of High Current
Although power rating is often the first thing customers look at in a receiver, high power output does not necessarily mean good sound. High current level is a much more important factor. Yamaha receivers has always had fairly high current levels, but with the
What It Does
In brief, Yamaha High Current Amplification achieves low impedance, high current power from input (power supply circuit) to output (speaker terminals). This drives the speakers much more smoothly and dynamically, for better sound from all sources, including
Specific Improvements
The first problem to be overcome was the difference in voltage that ordinary receivers suffer between the power supply and amplifier circuits, caused by current fluctuations. This was solved by
using
6-Channel High Power,
Discrete Amplifier Configuration
The
High Dynamic Power Capability
The
Linear Damping (Main L/R Channels)
Level variations due to high amp impedance tend to reduce an amplifier’s damping factor, and frequency variations cause it to fluctuate. This circuit cancels the effect of these variations, maintaining a high, stable damping factor, for superior articulation of all sounds and better frequency response.
Anti-Resonance ToP-ART Base
Supporting the heavy heat sinks and circuit board is Yamaha’s
High Current Amplification Principle
The voltage (A) of Block Electrolytic Capacitors and voltage (B) of Power Transistor Collector should be ideally at the same level. However, when the current become large, there will be a big difference in the level of each voltages.
There is also a level difference between Output of the Power Amplifier
(C)and Speaker Terminals (D), which is reflected by coppers of PCB, Speaker out put relays, cables and so on, resulting damaging the sound quality.
| A B |
Power | GND Amplifier |
|
Power
C D
GND Amplifier
Supply |
Supply
Circuit |
| Circuit |
Circuit
Circuit
Voltage level difference between A (power supply circuit) and B (amplifier circuit).
Voltage level difference between C (amplifier circuit output) and D (speaker terminals).
Conventional Amplifier | High Current Amplification | Conventional Amplifier | High Current Amplification |
4/10 (R/L/T/K)