MA2275 Vacuum Tube Integrated Amplifier

MA2275Vacuum TubeIntegrated Amplifier“ cutting-edge technology combined withclassic vacuum tube performance”The MA2275 is the first McIntosh integrated amplifier to rely exclusivelyon vacuum tubes in all audio circuits. The new design combines classicvacuum tube audio performance with state of the art control technology.A new ultra-low-noise preamp has been engineered for the MA2275.Old-fashioned point-to-point wiring, common in vacuum tube designs,has been replaced with glass epoxy printed circuit boards developedthrough modern computer-aided design techniques. Input switching isaccomplished inside glass cylinders filled with an inert gas to preventsignal degradation.The new, modernized circuit design of the classic MC275 power amplifier,which incorporates McIntosh’s exclusive Unity-Coupled output circuitryto provide clean, low-distortion power over the entire frequency range,serves as the power amplifier section in the MA2275.Low Noise MM Phono InputBalanced CD InputSix Program Source InputsPreamp-Out/Amplifier-In LoopExtra Set of Pre-Outs ProvidedTaps for 2, 4, & 8-Ohm SpeakersIlluminated Peak-Responding WattmetersSilent Electromagnetic SwitchingDefeatable Bass & Treble ControlsFiber Optic LightingHeadphone JackRemote ControlLow noise combined with clean power in an all vacuum tubeintegrated…available only from McIntosh.

McIntosh Laboratory, Inc. 2 Chambers Street, Binghamton, New York 13903-2699Tel (607) 723-3512 • US Toll-Free (800) 538-6576 • Fax: (607) 724-0549 • www.mcintoshlabs.comFor the Consumer’s Protection: In order to ensure the highest level of customer satisfaction, “new” McIntoshproducts may only be purchased over-the-counter or delivered and installed by an Authorized McIntosh Dealer.McIntosh products that are purchased over the Internet, by phone or mail order are presumed to be “used” anddo not qualify for any McIntosh Warranty. McIntosh does not warrant, in any way, products that are purchasedfrom anyone who is not an Authorized Dealer or products that have had their serial number altered or defaced.MA2275Vacuum TubeIntegratedAmplifierFLEXIBILITY6 sets of unbalanced inputs,main preamp-out/amp-inconnection and one additionalset of switched preampoutputs are included.PHONO INPUTThe ultra-quiet McIntoshphono stage for moving magnetcartridges is built-in. If desired,this input may be changed to“aux” high-level inputs.FULL POWER DELIVERYThe MA2275 delivers75 watts per channel into2, 4, and 8-ohm speakers.ULTRA LOW NOISEAND DISTORTIONDistortion-canceling propertiesof McIntosh’s Unity-CoupledOutput circuit and uniqueOutput Transformer designyield much lower distortionand noise across the entire20-20,000Hz music range.WIDE BANDWIDTHMcIntosh’s exclusiveOutput Circuit and Transformerdesigns ensure ultra-widefrequency bandwidthINVERTED CHASSISHeat producing tubesare placed on top undera protective cage, whileother circuits are shieldedby a beautiful polishedstainless steel chassis.POWER OUTPUTMinimum sine wave continuousaverage power output per channel,both channels operating is: 75 wattsinto 2, 4, or 8-ohm loads.RATED POWER BAND20Hz to 20kHzTOTAL HARMONIC DISTORTION0.5% max. at any level from 250milliwatts to rated power output perchannel from 20Hz to 20kHz.FREQUENCY RESPONSE+0, -0.5dB from 20Hz to 20kHz+0, -3dB from 10Hz to 50kHzSENSITIVITYHigh Level: 250mV for 2.5Vrated output (50mV IHF)Phono: 2.5mV for 2.5Vrated output (0.5mV IHF)Power Amplifier Input: 2.5Vfor rated outputA-WEIGHTED SIGNAL-TO-NOISE RATIOHigh Level: 93dB below rated outputPhono Input: 80dB below 10mV inputPower Amp: 100dB belowrated outputINTERMODULATION DISTORTIONSMPTE 0.5% max ifinstantaneous peak powerdoes not exceed 150Wper channel.INPUT IMPEDANCEHigh Level: 22k ohmsPhono: 47k ohms, 65pFMAXIMUM INPUT SIGNALHigh Level: 8VPhono: 90mVMAXIMUM PREAMPVOLTAGE OUTPUTHigh Level: 8VPhono: 8VMain Out: 8V at preamp outputVOLTAGE GAINHigh level to tape: 0dBHigh level to main: 15dBPOWER REQUIREMENTS120V, 50/60Hz, 3.6 AmpsPREAMP TUBE COMPLIMENT2 – 12AX7A Phono circuitry2 – 12AX7A High level circuitryPOWER AMP TUBE COMPLIMENT2 – 12AT74 – KT88/6550OVERALL DIMENSIONS (H x W x D including knobs and feet)10-1/8" (25.7cm) X 17-3/4" (45cm) x 18-3/4" (47.6cm)WEIGHT77 lbs. (35kg) net, 110 lbs. (50kg) boxed2 x 75 watts (8/4/2 ohms)All signal amplification by vacuum tubesWide power bandwidth with ultra-low distortionIlluminated peak-responding wattmetersSwitchable meter illuminationTape loop in/out providedGold plated input & output connectorsNoise and transient-free turn-on/turn-offHigh-performance headphone outputDual preamp outputsSwitched data output portsExternal remote sensor jack11.04.MA2275.20K 35006100