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The MODEL5 is not only an ideal amplifier when connected to high impedance horns, but even excels with critical speaker systems. Although it’s damping factor is allegedly not very high, the DSSF concept ensures optimum control and surprisingly neutrality even at extremely low impedances. buffered by capacitors. For the power transistors 40,000uF of capacitance ensure ample reserves for the relatively small output of this amplifier. OTHER FEATURES The MODEL5 integrated amplifier has five RCA POWER SUPPLY WITH 7 VOLTAGES The power supply of the MODEL5 utilised a specially manufactured toroidal transformer with a total of 7 secondary windings! This expensive power supply configuration is a surprise if you consider that normal amplifiers can operate with only one voltage. But Matthias Ruff has his own philosophy in this respect: “In the MODEL5 we work with a minimized circuit design but ensure the extensive power supply is absolutely stable in all operational modes”. The special transformer provides (with its shielded secondary windings) a total of 7 different voltages for the independent electrical supply of the different circuit modules, power transistors, displays, relays etc. Interferences are minimized, as the supply of power to the different components is completely independent from each other. The toroidal transformer has a static and magnetic shielding to avoid electromagnetic radiation into the other components. The power supply of the various circuit modules is INPUTS. As an option INPUT 5 can be reconfigured internally with a jumper into AV-mode. In AV-mode the volume control of the MODEL5 is bridged for the INPUT 5. If you want to integrate your high-end stereo within your home theatre system, you simply have to switch the input selector to INPUT 5. The volume of the left and right front channels is then centrally controlled by the AV processor. The MODEL5 has one RCA RECORD-OUT, one PRE-OUT with XLR connectors for use with active speakers (ex. SOLO) and a SPEAKER-OUT fitted with WBT connectors is used for the connection to the main passive speaker systems. The main power switch is located at the backside of the unit. Here you can completely turn the MODEL5 off and detach it from the mains. In the STANDBYposition of the input selector, a red LED in the display indicates that the amplifier is ready for operation.
The display is illuminated in white as soon as an INPUT (1 to 5) is selected. If the MUTE-button of the remote control is pressed the illumination of the VOLUME display is switched off. The brightness of the various displays can be adjusted by the means of three dimmers controls on the underside of the unit. These are accessible from the outside. A specially assigned dimmer to control the brigthness of the AV-channel can be set separately. Thus it is possible to automatically dim or switch off the illumination of the MODEL5 in home theatre systems with projection as soon as the AV-channel is selected. The remote control, which is included with the MODEL5, allows the setting of the volume and MUTE function.
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