Operation

After following the procedures outlined in the Installation/Rear Panel Power Connections and Signal Connections sections, the Amplifier can be turned on by pressing the FRONT PANEL STANDBY/POWER button. Allow approximately twenty (20) minutes for the amplifier to reach operating temperature and maximum performance potential. A short warm-up time is dependent upon the amplifier being plugged in to an active AC mains power source for at least two hours prior to activating the FRONT PANEL STANDBY/POWER button. Therefore, it is recommended that the Amplifier be continuously connected to an active AC mains power source.

If you desire to disconnect the AC mains for an extended period of time, simply disconnect the AC power cable from the wall outlet and reconnect upon your return. Slight transients may be heard in the loudspeakers during the AC mains connect/disconnect transitions.

Your new Model 2 Amplifier will require an initial break-in period of at least eighty (80) hours before maximum performance can be expected. Efficient break-in procedures require the Amplifier to be fully operational (playing music). Continuous and noticeable performance improvements will occur during subsequent months of operation.

To achieve the maximum performance for which this Amplifier was designed, it is recommended that balanced signal source (INPUT) and LOW INPUT IMPEDANCE options are used. This condition requires that the driving source component (preamplifier) is equipped with balanced outputs and sufficient output current to properly drive the input of the Model 2 when the LOW INPUT IMPEDANCE option is selected. Most high-quality solid state pream- plifiers can satisfy these conditions, and best results are obtained when the output impedance of the preamplifier (600Ω balanced) matches the input impedance of the power Amplifier (600Ω balanced). When the impedances are matched, maximum signal power transfer and signal fidelity are achieved in addition to the advantage of utilization of long lengths (10 meters and greater) of interconnect between components with no sonic degradation. However, there will be a 6 dB decrease in volume relative to a mismatched condition (low driving source impedance driving high load (Amplifier input) impedance).

If there is any doubt as to the compatibility of the above mentioned components, then HIGH INPUT IMPEDANCE should be selected. Since the electrical performance of the Model 2 is not changed when selecting different INPUT IMPEDANCE options, apparent differences in sonic quality can be attributed to mismatched impedances.

Due to different sensitivities of associated equipment used with the Model 2, the OVERALL GAIN switch can be used to optimize the total gain structure of the entire system. This allows the volume control of your preamp to be used in an ideal mid-range position.

Model 2 specifications

The Jeff Rowland Design Group Model 2 is a remarkable preamplifier that stands out in the realm of high-end audio equipment. Known for its exquisite craftsmanship and advanced technologies, the Model 2 has garnered a loyal following among audiophiles and music lovers who appreciate both aesthetics and sound quality.

One of the standout features of the Model 2 is its distinctive design. The chassis is constructed from high-grade aluminum, which not only adds to the aesthetic appeal but also provides a robust structure that minimizes resonance and vibration. This meticulous attention to detail extends to the user interface, where every knob and switch is thoughtfully designed for durability and ease of use. The overall finish is elegant, making the Model 2 a stunning centerpiece in any audio system.

Technologically, the Model 2 employs a fully balanced signal path, which is critical for reducing noise and distortion. This design choice ensures that the audio signal remains pure and maintains its integrity throughout the amplification process. The preamplifier is equipped with high-performance capacitors and class-A circuitry that contribute to its ability to deliver a wide dynamic range and exceptional detail, allowing listeners to experience music as it was intended by the artists.

Another significant characteristic of the Model 2 is its versatility. It includes multiple input options, accommodating a wide range of audio sources, from vinyl turntables to digital streaming devices. The preamplifier also features a high-quality headphone output, allowing users to enjoy their favorite music through headphones without compromising sound quality.

Additionally, the Model 2 incorporates advanced technology for remote control functionality, providing convenience without sacrificing performance. The remote allows users to adjust volume levels and switch between sources effortlessly, enhancing the listening experience.

In summary, the Jeff Rowland Design Group Model 2 is a high-end preamplifier that boasts exceptional build quality, a fully balanced signal path, and versatile connectivity options. Its attention to detail and advanced technologies make it a desirable choice for those who demand superior audio performance. Whether used in a dedicated listening room or as part of a larger audio system, the Model 2 elevates the experience of music to a new level of excellence.