Technical Description, con’t, Power Output Meter

Figure 14

Figure 15

Technical Description, con’t

feedback designs.

The fully Balanced Push-Pull design is used from input to output. The resulting fully balanced configuration can- cels many forms of audible distortion and greatly improves the Signal-to-Noise ratio of the amplifier.

While conventional designs only take output from the plate, the Patented Unity Coupled Power Amplifier Circuitry takes the Power Output from both the plate and cathode of the Power Output Tubes. This allows for only one half of the turns ratio in the Output Transformer used in conventional designs. The result is much lower distor- tion, wider bandwidth and increased loudspeaker damping factor. Refer to figure 13.

Figure 13

The output signals of the two matched Patented Unity Coupled Circuit Power Amplifiers operate in a push-pull balanced circuit and are coupled together in the unique McIntosh MC2301 Dual Core Output Transformer. Refer to figure 14. It provides low distortion power transfer at frequencies from below 20Hz to well beyond 20,000Hz with optimum impedance points of two ohms, four ohms and eight ohms. The unequaled expertise of McIntosh in the design

and manu- facturing of trans- formers is legendary in the high fidelity industry.

Preci- sion metal film resis- tors and low dielec- tric absorp- tion film capacitors

are used in all critical circuit locations. The circuit design of the MC2301 contributes to low operating temperatures using convection cooling. No fans are needed.

Power Output Meter

The McIntosh MC2301 has a large Output Watt Meter that responds 95% full scale to a single cycle tone burst at 2kHz. Refer to figure 15. The voltage outputs are electroni- cally measured and fed to a special circuit that accelerates the pointer

movement in the upward direction. When the pointer reaches

its peak it pauses only long enough for the hu- man eye to perceive its position, then drops.

It is almost 10 times faster than a professional VU meter. A front panel switch is provided to change the meter to

the Watts Hold Mode of operation. This allows fast upward movement of the pointer but greatly increases Hold Time at the peak of its travel. The highest power output of the source material is thus recorded.

Sentry Monitor Protection Circuit

The MC2301 incorporates the newly designed Sentry Monitor Tube Protection Circuitry. Refer to figure 16. This circuit provides protection to the Power Amplifier in the event of an improper load (mismatched impedance), shorted loudspeaker cable or if a Power Output Tube

Figure 16

MC2301 specifications

The McIntosh MC2301 is an exceptional tube amplifier renowned for its unique blend of classic design and modern technology. Launched by the prestigious audio brand McIntosh, this amplifier embodies the company’s commitment to high-quality sound reproduction. The MC2301 is specifically designed to deliver an unmatched listening experience for audiophiles and music enthusiasts alike.

At the heart of the MC2301 are its powerful tubes, producing 300 watts of output power. It employs a push-pull design using eight matched output vacuum tubes in a stunning monoblock configuration. This setup effectively delivers a rich, warm sound that only tube amplifiers can provide, contributing to a lush audio experience and bringing out nuances in music that solid-state amplifiers often miss.

One of the standout features of the MC2301 is its ability to preserve fidelity at various volume levels, thanks to its advanced circuit design. The amplifier incorporates McIntosh's patented Power Guard technology, which prevents clipping and distortion, ensuring that your music plays clearly and without compromise even at high volumes. This is particularly useful in high-demand listening sessions, where performance consistency is crucial.

The MC2301 also features the innovative Sentry Monitor circuit, which protects the amplifier from short circuits and overloads. This circuit continuously monitors the output stage and disconnects the output if it detects any issues, allowing the amplifier to maintain longevity and reliability in performance.

In terms of aesthetics, the MC2301 is visually stunning, maintaining McIntosh’s heritage style with its iconic glass front panel, illuminated logo, and distinctive blue watt meters. The build quality is remarkable, using carefully selected materials to ensure both durability and elegance.

Furthermore, the MC2301 includes balanced and unbalanced inputs, allowing for flexibility in connectivity. Its ability to pair seamlessly with various audio sources makes it a versatile choice for any high-fidelity system.

Overall, the McIntosh MC2301 amplifier is a perfect fusion of vintage-inspired sound craftsmanship and modern engineering, making it an outstanding choice for those seeking to elevate their audio experience. Its combination of power, protection, and pristine sound quality solidifies its status as a flagship product in the world of high-end audio. Whether powering a sophisticated home audio system or used in a professional setting, the MC2301 is sure to impress even the most discerning audiophiles.