General:Almost as capable as the latest version (MX123) at a fraction of the cost, yet still able to manage HDMI signals. If you require 4K video you would just connect your sources directly to the TV and use this unit for audio processing which is where McIntosh shines.Using the built-in Audyssey DSX® Auto Setup you'll avoid fiddling with individual bands, settings, etc., to get the best sound possible in your home theater. (Note: Audyssey microphone and stand not included, but are easily found online).Yes some of the HDMI features and standards may be older, but best results are usually achieved from running your sources directly to your display from experience.This MX121 will come to you factory reset with its original remote.SkyFi Cosmetic Notes:This processor has some light marking on the top and side panels. Overall good condition.Brand Background:McIntosh Laboratory is an American manufacturer of handcrafted high-end audio equipment based in Binghamton, New York. The company was founded in 1949 by Frank McIntosh. The company designs and produces audio amplifiers, stereo tuners and other consumer electronics products.Ownership:Single OwnerConnections:HDMI, RCA, XLR and Network. Removable power cord.General Sound:Accurate to the recordingCosmetic Condition:8/10 = Very Good. Excellent front faceplate, one minor flaw on chassis side or top. See our detailed rating description here.Included:Just the unit and remotePacking:Will be packed using our highly developed in-house process and custom packing materials.Specs:McIntosh Performance Features Include:• HDMI 1.4a with 3D Passthru SwitchingThere are six HDMI 1.4a Inputs. HDMI Output 1 includes the new Digital Audio Return Channel (ARC) signal from the TV1, thus eliminating the need for an extra cable and simplifies operation. HDMI inputs are compatible with Deep Color, x.v.Color, Auto Lipsync and HDMI Component Control.• Analog Video/Audio Switching with ScalingComponent Video Inputs and Composite Video Inputs (Analog Video Signals) are also converted to a Digital Video Signal with resolution up to 1080P at the HDMI Outputs.• Balanced Inputs and OutputsA pair of Balanced high level Inputs and an eight channel Balanced Output are provided, permitting long cable lengths without a loss in sound quality.• Moving Magnet Phono InputThere is a Precision Phono Preamplifier for Moving Magnet Cartridges.• Built-in Dolby True HD and DTS-HD Master DecodersThe MX121 also provides built-in decoding of the Dolby Pro Logic IIz, Dolby Pro Logic IIx, Dolby Digital EX, DTS Neo6 and DTS-ES Sound Tracks.• Internet StreamingThe MX121 when connected to a network, offers Internet Radio, with music and photo streaming.• Audyssey DSX®Audyssey DSX is a scalable system that adds new speakers to improve surround impression. Audyssey DSX first adds Wide channels for the biggest impact on envelopment and then creates Height channels to reproduce the next most important acoustical and perceptual cues. Surround Envelopment Processing is used to enhance the blend between the front and surround channels.Audio SpecificationsUnless otherwise noted, the below MX121 Specifications where taken with Audyssey bypassed and manual Tone/EQ set to flat setting.Frequency Response±0.5dB from 20Hz-20,000HzTotal Harmonic Distortion0.005% maximum from 20Hz to 20,000Hz at rated outputSignal To Noise RatioPhono: 86dB below 10mV input (A Weighted) High Level: 96dB below rated output (A Weighted)Rated Output Voltage2.5V Unbalanced Outputs (Main Zone) 5.0V Balanced Outputs (Main Zone)Maximum Voltage Output6V Unbalanced 12V BalancedOutput Impedance220 ohmsInput ImpedancePhono: 47k Ohms, 65pfHigh Level: 20k Ohms Unbalanced and BalancedSensitivity for Rated OutputPhono: 4.5mVHigh Level: 450mV Unbalanced, 900mV BalancedMaximum Input SignalPhono: 50mVHigh Level: 4.5V Unbalanced and BalancedTone ControlsBass Control: ±6dB at 30Hz Treble Control: ±6dB at 10,000HzVideo SpecificationsSignal SystemNTSC/PALHDMIVersion 1.4 (includes support for Deep Color, x.v.Color, Auto Lipsync, Audio Return Channel and HDMI Component Control) ScalingAnalog Video Inputs scaled to a 1080P Digital SignalComponent Video Output LevelY Output Level 1.0Vp-p (75 OHM) PB/CB Output Level 0.7Vp-p (75 OHM) PR/CR Output Level 0.7Vp-p (75 OHM)Composite Video Output Level1Vp-p (75 OHM)Dimensions:Width is 17-1/2 inches (44.45cm)Height is 7-5/8 inches (19.37cm) including feetDepth is 19-1/2 inches (49.53cm) including the Front Panel, Knobs, Rear Panel Connections and USB DriveWeight:30 lbs.Link to Manual:Click Here