Jeff Rowland Design Group 302 instruction

Amplifier Installation, Use, and Care

Locate the amplifier as close as possible to its final installation point. Allow access to the rear panel for making connections.

The Model 302 Stereo Power Amplifier is extremely efficient and convection cooled, eliminating the need for fans or forced-air cooling. Multiple chassis can be stacked vertically, facilitating an upward flow of warm air currents throughout the vertical heatsink areas. This upward flow must not be blocked or recirculated around the chassis if proper cooling is to be maintained.

Typical installations allow the amplifier to be rigidly coupled to a support structure or floor via optional spiked coupling supports that are available separately from JRDG. In carpeted installations, these supports provide excellent anchoring from the amplifier chassis to the rigid floor or sub-floor below. If there is concern about damage to the structure or floor's finish, a coin can be placed beneath each spiked coupling support. In installations where the resonant properties of the supporting structure are poor or unknown, the amplifier chassis can be loosely coupled to the supporting structure via the supplied compliant isolation interface pads. This will help to attenuate the transfer of vibration or resonant energy from the support structure to the amplifier chassis.

For rack-mounted or custom applications, a rack-mountable faceplate can be ordered and manufactured by Jeff Rowland Design Group. Please contact your dealer or distributor with questions about custom rack-mountable faceplates and delivery times. Note: Please keep in mind that the Model 302 is a very heavy amplifier and that additional support will be required from beneath the amplifier. The faceplate alone is not sufficient support for total weight of the amplifier!

The Jeff Rowland Design Group Model 302 Stereo Power Amplifier has been designed with comprehensive protection circuits that allow the amplifier to operate at the highest level of efficiency and performance in any normal operating situation. However, there are a few important use and care principles that must be kept in mind when operating the amplifier:

!Do not expose the amplifier to rain, moisture, or excessively damp conditions.

!Do not disconnect the amplifier from AC mains unless absolutely necessary and without first placing the amplifier in Standby mode.

!The Model 302 Stereo Power Amplifier must not be modified in any way, other than according to official service bulletins from Jeff Rowland Design Group. Other wise, the factory warranty will be immediately voided.

!The Model 302 Stereo Power Amplifier can be operated at a nominal 100, 120, 220, or 240 volts AC. The amplifier must be wired for the correct AC input voltage before operation or serious damage will result.

!To clean the Model 302 Stereo Power Amplifier, use a soft cloth moistened with plain water. Never apply water, dusting sprays, solvents, abrasives, or cleaning fluids directly to the chassis!

!Be sure the amplifier is in STANDBY mode (front panel indicator light OFF) before connecting or disconnecting any loudspeaker or interconnect cables.

302 specifications

Jeff Rowland Design Group (JRDG) is renowned for its commitment to high-end audio equipment, and the Model 302 amplifier is a testament to that legacy. This amplifier exemplifies not only sonic performance but also the innovative technologies that JRDG employs in its designs.

The Model 302 is a stereo amplifier that delivers outstanding audio fidelity, rated at 150 watts per channel into 8 ohms, with a remarkable 300 watts into 4 ohms. It is crafted to drive a wide range of speakers, making it extremely versatile, and ensuring that it can perform optimally in various audio setups. The amplifier presents an unmatched dynamic capability, allowing it to reproduce both the most delicate notes and the most powerful crescendos with equal clarity and precision.

One of the standout features of the Model 302 is its use of power supply regulation. JRDG employs a proprietary technology known as "Dynamic Power Management," which continuously adjusts the power supply in response to the demands of the audio signal. This dynamic approach helps maintain low distortion and high efficiency, resulting in a clean and accurate sound reproduction. The design minimizes noise and interference, ensuring an immersive listening experience.

Additionally, the Model 302 showcases an elegant design, featuring a minimalist aesthetic that is characteristic of Jeff Rowland's philosophy. Its understated yet sophisticated look is complemented by a chassis that effectively dampens vibrations, further enhancing audio performance. The construction itself uses high-quality materials, ensuring durability and longevity, appealing to both audiophiles and casual listeners alike.

The amplifier also incorporates advanced thermal management technology, designed to keep the unit cool even during extended periods of intense use. This is essential for maintaining consistent performance and avoiding overheating, which can negatively affect sound quality.

Overall, the Jeff Rowland Design Group Model 302 epitomizes high-end audio engineering. With its powerful performance, innovative features, and timeless aesthetics, it appeals to discerning listeners who seek not just a component, but a significant part of their audio journey. The Model 302 is a celebration of what can be achieved when technology and art converge in pursuit of perfect sound.