The Pro iCAN Signature is iFi's new upgraded edition of the original Pro iCAN. The Signature edition builds on the strengths of the Pro iCAN and features even more ultra-grade audiophile components designed to take your listening to a higher plane than ever before. The Pro iCan Signature is a top-of-the-line headphone amplifier that is capable of driving anything and everything from the most sensitive custom iEMs to the AKG K-1000, the most difficult to drive headphone ever made. The Pro iCAN Signature wouldn’t be iFi's without their signature sonic tweaks. Just like the original, it boasts XBass and 3D Holographic settings so that you can calibrate sound to suit your system and personal taste. FEATURES Revised circuit design incorporates even more ultra-grade audiophile components Upgraded power supply circuits to eradicate even more noise and distortion Top of the range iPower Elite offboard AC/DC power supply included 4.4mm Pentaconn balanced-headphone output TECHNICAL SPECS Frequency Response: 0.5Hz to 500kHz(-3dB) THD & N Balanced Solid-State:0.0015% Tube: 0.002% Tube+: 0.012% Single- Ended Solid-State: 0.005% Tube: 0.005% Tube+: 0.2% SNR Balanced: >147dB(A) Single-Ended: > 137dB(A) Output Power Balanced: >14,000mW (@ 16) Single-Ended: >4,800mW (@ 16) Output Voltage Balanced: >23V (@ 600) Single-Ended: >11.5v (@ 600) Input voltage (Pro iDSD Signature): DC 9V/6.7A – 18V/3.35A Input voltage (iPower Elite): AC 85 – 265V, 50/60Hz Power consumption: < 22W idle, 50W max Dimensions 213 x 193 x 63 mm (6.2" x 3.9" x 1.4") Net weight 1.93 kg (4.3 lbs)