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At a Glance
Rega's mid-price amplifier has deservedly won numerous awards and proved very popular here. It includes an excellent phono stage making it perfect for a mid-price vinyl based system.
The Elex-R has been built to Rega’s extremely high standards of reliability and quality to ensure many years of musical enjoyment. The new Elex-R is a sublime blend of the Brio-R design with the power circuits and advanced phono stage of the Elicit-R. Rega’s engineers have achieved the perfect balance of power, control and dynamics, delivering a performance that always puts the music first.
You will find plenty of connectivity options allowing complete flexibility and integration within the rest of the Rega range.
Winner of the WHAT HI-FI 2014 Award for Best stereo amp.
The Elex-R is built to the highest standard and designed to deliver the best possible audio performance whilst remaining simple to use and easy to setup.The Elex-R is built into the full width Rega case with increased heat dissipation, which along with a larger transformer enables the Elex-R to deliver 90 Watts per channel into 6Ω and 72.5 Watts per channel into a design centre rating of 8.
A great deal of time and effort has been invested in developing the circuit and construction utilizing the highest specification of components throughout. The new design includes useful features like pre-amplifier output, to enable the new Elex-R amplifier to be used in a wide combination of systems yet shuns superfluous gadgets such as tone controls or a headphone socket which have the potential to obstruct the signal path and degrade the produced sound quality.
The primary function of an amplifier is to boost and equalize the low level signal generated by a phono cartridge, DAC and CD player or other source component to a level that can drive the loudspeakers. It is vital that the amplifier achieves this whilst minimising distortion, which would directly affect the music. The distortion level is typically 0.007%; just under the clipping of the output.
The volume control and pre-amplifier used in the Elex-R is designed to overcome the problems associated with more conventional arrangements, by using a custom chip along with peripheral support IC’s like a microcontroller and a custom made rotary volume control.
The Elex-R uses a combined feedback and passive volume control, where the feedback and input levels are varied to set the required volume level. The level and tracking between the two channels is set by the close tolerance parts in the pre-amplifier circuit and less by the actual potentiometer itself, thus keeping the mismatch of channels due to volume control tracking irregularities to a minimum. This approach also reduces noise and input overload as the control will only ‘use’ the required gain to amplify the signal.This form of volume control is normally only found in professional broadcast environments where accurate low noise control of levels is required.
Power Amplifier Technology
The output amplifier used in the Elex-R, Elicit-R and Brio-R was born after extensive research by Rega engineers to develop a low source impedance emitter follower Class-A driver stage. This is based around a complementary pair of 150w Sanken Darlington output transistors. The technical and sonic improvement gained by the use of low impedance drivers is well known, however, it can feature high standing currents in the driver stage when using standard transistor configurations. By combining the low impedance driver with the Sanken Darlington transistors (with their imbedded thermal bias network running at a lower standing current) this combination forms a complementary emitter follower emulating Class-A conditions with good thermal stability with lower standing.