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  1. question2013 Product Brochures
    2013 - Product Brochures available for download below.
  2. questionCurrent Product Reviews
    Model 825 Stereo Power Amplifier Audiotechnique #385 - October 2013 - by Winson Ng Model 725 Monoblock Power Amplifier theaudiobeat.com - September 2013 - by Roy Gregory hifi-advice.com - August 2013 - by Christiaan Punter The Absolute Sound #228 - December 2012 - by Robert Harley Model 625 Ste ...
  3. questionCorus Preamplifier Features and Specifications
    Precision machined from a single block of non-resonant aircraft-grade aluminum, the Corus Preamplifier’s main chassis houses all audio and control circuits, entirely isolating the power supply in its own external machined aluminum housing. The Corus Preamplifier features fully isolated tra ...
  4. questionDoes the Corus support volume bypass with unity gain for compatibility with home theater processors?
    Yes, the Corus preamplifier has been designed with a very flexible home theater bypass architecture. Any one of the Corus inputs can be assigned to perform theater bypass with unity gain. Please note that only 1 input at a time can be assigned to theater bypass. Inputs assigned to theater bypass ...
  5. questionWhy does the Corus provide a completely separate gain circuit for record output?
    The volume of the Corus record output section must be set independently from the volume of the main outputs, because internally the Corus features 2 separate and identical transformer-coupled preamplification circuits. The main preamplification circuit controls all main outputs, while the second ...
  6. questionCan the Corus main output level be adjusted by a gain offset?
    Yes, a volume offset adjustment can be applied to the Corus unbalanced (RCA) output 2, in 0.5dB increments, ranging from -10dB to +10dB, for a maximum 20dB. The offset adjustment can be performed from the main control panel of the preamplifier, as well as from the remote control transmitter. Pl ...
  7. questionHow flexible is the Corus input/output interface architecture?
    The Corus preamplifier features a highly flexible I/O interface architecture. The preamplifier is designed to be a fully differentially balanced device in its input phases, output phases, as well as in circuit. The Corus advanced transformer-coupled topology supports balanced as well as single e ...
  8. questionDoes the Corus preamplifier feature transformer coupled inputs?
    Yes, each Corus input, balanced and single ended alike, is independently transformer coupled, and features its own expensive custom-wound matched Lundahl transformer. All input and outputs in Corus utilize identical Lundahl transformers, each tuned to its input or output role through proprietary ...
  9. questionWhat are the unique features of Corus remote control system?
    The Corus infrared remote control transmitter is matched by a remote sensor station that connects to the preamplifier’s chassis via a 2 meter long wire. The wired connection allows the sensor unit to be placed at some distance from the preamplifier. The tethered sensor allows full remote ...
  10. questionWhat are the technology and salient features of the Corus display?
    The advanced human factors engineering of the Corus preamplifier extends to its front panel display. The Corus features a broad spectrum vacuum-fluorescent 32 by 320 pixel graphic display (VFD), which has been tuned to an attractive white tint with a trace of blue. The display has comfortable sp ...
  11. questionWhy a superior active preamplifier like the Corus sounds better than a passive device?
    Passive preamplifiers add a lot of resistance that alters the input signal. Furthermore, because of their passive nature, they cannot behave as intelligent and actively equalizing system interfaces between components. Conversely, a superior active preamplifier like the Corus does not alter the i ...
  12. questionWhat are the design goals of the Corus preamplifier?
    Conceived to become the centerpiece of a sophisticated music reproduction system, the Corus is designed to be an ideal interface instrument between heterogeneous input sources and destination devices, while offering the user maximum flexibility and ease of use. Provide the user with a transcend ...
  13. questionWhy does the Corus support finely adjustable gain offsets on all inputs?
    The extremely fine 0.5dB granularity of the Corus input gain offset adjustments applicable to each balanced and unbalanced input guarantees that the preamplifier master volume control can yield a perfectly equalized gain structure to all input devices, regardless of their output level characteri ...
  14. questionIs the Corus's record output volume set independently from main volume?
    Yes, the volume of the Corus's record output must be set independently from the main volume gain. This is because Corus contains 2 completely independent and identical preamplification circuits: the main preamplification circuit acts on the main outputs, while a second circuit is dedicated to t ...
  15. questionWhatís unique in Corusís unity gain home theater bypass architecture?
    Any of the Corus's balanced or single ended inputs can be configured to serve as the unity gain home theater input. Because of its transformer-coupled input stages, the Corus preamplifier is compatible with home theater processors featuring heterogeneous signal characteristics. The Corus not ...
  16. questionWhy does the Corus preamplifier feature matching Lundahl transformers in both its input and output stages?
    Advanced transformer coupling in the input and output stages provides Corus with universal compatibility with all source and destination components. The design is critical to the preamplifier’s remarkable elasticity under variable input loads, to its high common mode and differential mode ...
  17. questionWhy are Corus outputs completely isolated?
    Each Corus output is completely isolated electrically and electromagnetically. All outputs are Isolated from ground and from each other to cancel any residual ground currents, which may be otherwise circulating among them. A high degree of output isolation is particularly important for maintain ...
  18. questionWhy is Corus completely balanced in its input stages, its output stages, as well as in circuit?
    A fully balanced design is pivotal to the hallmark sonic performance that makes the exquisite Corus musical experience truly transcendent. The preamplifier is fully balanced in input, output, and in circuit to yield an instrument grade system interface that is highly insensitive to heterogeneous ...
  19. questionCorus and Model 625 Review : HiFi+ Oct 2011
    Please click the attachment link below for complete HiFi+ equipment review of the Corus Preamplifier and Model 625 Stereo Amplifier. As featured in HiFi+ #83, October 2011.