Jeff Rowland CORUS Flagship Preamplifier with PSU Power Storage Unit

Jeff Roland's Corus is the pinnacle of sensuous, grain-free musicality.  There are dozens of great preamps over $20K that convey music with a completely neutral and transparent presentation, but only a few that bring it to life quite like the Corus.  With exceptional frequency extension and linearity, otherworldly bass definition, and extraordinarilry complex harmonic structure.  

CORUS is Jeff Rowlands crown jewel, the ultimate in perfected performance from a company that strives for nothing less.  Not only does the sound sweep you away, but the Corus itself is mesmerizing.  In classic Rowland style you get elegantly milled ingots of aircraft-grade aluminum finished like jewelry.  From the solid heft of this unit, to the military / NASA grade rear connectors, you can tell that no expense was spared in achieving performance at this level...and nothing was overlooked.

The Corus comes standard with a dedicated, stand alone power supply, or can be upgraded for ($7000) to the Rowland PSU.  This is shown in the images and INCLUDED with this Corus. The PSU is not just a cleaner power supply, it actually stores energy as pure DC power and delivers a near perfect stream of it to the Corus.  Why?  AC power isolation at this level provides soundstage expansion and musicality unlike anything you may have ever heard!  Stealing a quote from the website, it "Sounds like your power is coming from heaven".  These are rare to find, especially on the pre-owned market.

Must be heard to be appreciated.  But be prepared for an unforgettable experience.

FEATURES:

• Ultra Low Resonance Chassis - Balanced preamplifier design housed inside twin ultra-low resonance, structurally rigid chassis precision-machined from solid ingots of aircraft grade 6061-T6 aluminum, completely sealed for trouble-free operation, yield maximum electrical/EMI/RF isolation.
• Diamond Sculpted Front Panel - Matching front panels precision-machined and sculpted with a diamond tipped cutting tool into a uniquely elegant prismatic curved design.
• Functional isolation - Power supplies and microprocessor-based system control circuits confined inside control chassis. Sensitive audio circuits isolated in audio chassis. Left and right subsystems further isolated into individual milled Aluminum pockets in true dual mono design for ultimate RF and EMI shielding.
• Free of internal signal pollution - Control subsystem taken completely offline after each command execution to maximize sound purity.
• Multi-regulated AC SMPS - High speed switch mode power supply (SMPS) developed for aerospace applications incorporates passive power factor correction (PFC) for sonic performance so pure and musical that is virtually invariant to power cords.
• Ceramic boards - Circuits implemented on military-grade 4-layer ceramic boards for minimum energy retention. Boards further sport numerous grounding points for extended internal star-grounding.
• Shortest signal path - Gain stages based on ultra-low noise advanced TI Burr brown OPA1632 differential balanced audio amplifiers are implemented into shortest signal path of any Rowland reference preamplifier.
• Dual zone preamplification - Separate 2nd gain stage for record outputs sports own OPA-1632 modules and independent volume.
• Transformer-coupled - All inputs and outputs coupled to identical custom wound Lundahl transformers for maximum noise rejection and cross-component compatibility. Transformer coupling also ensures invariant gain for balanced and unbalanced devices. Flexible connectivity: 6 inputs (4 XLR balanced, 2 RCA unbalanced); 4 main outputs (2 XLR balanced, 2 RCA unbalanced); 2 record outputs (1 XLR balanced, 1 RCA unbalanced).
• Input gain offsets - Hi resolution independently programmable gain offset on each main input ranging from -10dB to +10dB in 0.5dB increments--. Output offset: hi resolution programmable gain offset on main unbalanced input 2 with 0.5dB resolution.
• Unity gain inputs - All main input configurable as unity gain bypass for compatibility with theater processors.
• Phase inversion - Independent signal phase inversion control on left and right channels for optimum speaker setup and system checks.
• Channel balance - Hi resolution (1.0dB) panning of stereophonic image (channel balance) for a maximum +/-20dB shift.
• VFD - Long life graphic vacuum fluorescent display (VFD) for system control. Remote control: Highly ergonomic, custom remote control transmitter milled from Aluminum billet supports complete system control and duplicates front panel operations.
• Remote sensor - Wired remote sensor milled from Aluminum billet enables Criterion’s control while housing preamplifier in closed cabinet enclosures.
• Precision volume adjustments - Dual rate volume control allows precision level adjustments over nearly a 100 dB range. The volume control incorporates a permanently noiseless optical encoder that always maintain its tactile feel, accuracy, and channel balance at all settings. The volume can be adjusted from 0dB to 99.5dB from the multi-role control knob on the front panel, as well as from the multi-function remote control. Rapid turns of the control knob adjust the volume by 1.5dB increments. Slow turns of the control allow for very fine adjustments by 0.5dB increments.
• Quiet power-up - Rocker switch on back panel coupled to timer relay, turns Criterion quietly on to full power after circuit test and stabilization.
• Green technology - Highly efficient circuits yield modest power consumption of mere 50 Watts in class A, resulting in cool operations, and permits constant power-up to eliminate warm-up time and maximize musical performance. The Corus can operate also enclosed inside an entertainment unit.

SPECIFICATION: 

• OVERALL GAIN: Independently Programmable 0 to 20 dB on each input
• GAIN RANGE: 99.5 dB, 199 Equal Increments
• GAIN RESOLUTION: 0.5 dB, +/- 0.03 dB Over Entire Range
• FREQUENCY RESPONSE: 10 Hz – 300 kHz, -3 dB @ 8 ohms
• MAXIMUM INPUT LEVEL: 13.5 volts (RMS) @ 0 dB Gain
• MaAXIMUM OUTPUT LEVEL: 13.5 volts (RMS)
• THD + NOISE: < .003% @ 2 volt (RMS) Output, 50 Hz – 20 kHz
• SINGAL TO NOISE RATIO: > 100 dB
• COMMON MODE REJECTION RATIO: > 90 dB, 20 Hz – 20 kHz
• CHANNEL SEPERATION: 99.5 dB
• INPUT IMPEDANCE: 40k ohms Balanced or Unbalanced
• OUTPUT IMPEDANCE: 60 ohms Balanced or Unbalanced
• INPUTS: 4 pair Balanced (XLR), 2 pair Unbalanced (RCA)
• OUTPUTS: 2 pair Balanced (XLR), 2 pair Unbalanced (RCA) for Main Out, 1 pair Balanced (XLR), 1 pair Unbalanced (RCA) for Record Out
• POWER CONSUMPTION: 15 watts
• DISPLAY: 320 x 32 dot Vacuum Fluorescent Display (VFD)
• PREAMPLIFIER WEIGHT: 22 lbs / 10 kg
• POWER SUPPLY WEIGHT: 27 Lbs / 15.9 kg
• PREAMPLIFIER DIMENSIONS H/W/D: 3.9” x 15.5” x 12.3” (99mm x 394mm x 311mm)
• POWER SUPPLY DIMENSIONS: H/W/D: 3.9” x 15.5” x 12.3 (99mm x 394mm x 311mm)

CONDITION -  Excellent.  Locally owned unit, exceptionally well cared for and near flawless condition.  Includes all original power cords, power supply interconnects, manual, inner boxes and original outer master box.  Includes original aluminum remote and remote receiver (for capturing IR singals oustside of a cabinet). Both like new.

SHIPPING - We ship worldwide with UPS, Fed-Ex and various truck freight lines.  All items are packed and padded with care if the original packaging is deemed insufficient.  We know how exciting it is to anticipate the arrival of new gear and we want your item to arrive in the same condition it left our facility.

TAX - 6.5% if picked up in our store or shipped to a FL address. 0% if shipped outside Florida.

 ABOUT US -  Salon One Audio is a small town, hi-end audio store dedicated to a great customer experience.  We've been selling new, pre-owned and demo audio gear since 1986.  We'll treat you right whether its a new purchase, trade-in, upgrade or you just need some expert advice.  We offer excellent trade-in values and package discounts.  We are also authorized distributors for most lines we carry.

Great audio is a journey not just a purchase.  We'll guide you to the best gear within your budget.

CONTACT INFO - 

(407) 953-9596

[email protected]

www.salon1audio.com