Operation, Setting the Gain | Boulder Amplifiers 101 specification

OPERATION

SETTING THE GAIN

•Turn the gain control fully counter-clockwise, turn the trim control fully clockwise and check that the +48V phantom power is off.

•Connect the microphone to the preamplifier and then turn on the phantom power switch on if required.

•When sending a signal to a recorder that has fixed input levels, simply increase the gain until the optimum recording level is reached.

When sending a signal to a tape recorder with a variable input, use the following procedure:

•Turn the gain control fully counter-clockwise, turn the trim control fully clockwise.

•Set the record level control on the recorder to 12 o’clock or midway between minimum and maximum.

•With the sound source present, turn the preamplifier gain control clockwise until the peak LED begins flashing red, then reduce the gain until the red stops flashing.

Since red indicates a peak level which is 10dB before clipping, it is OK for it to come on occasionally during recording.

•Adjust the recorder input control for the optimum recording level.

About the Trim Control

The trim control can be used for fine output level adjustment as well as for level riding during recording. It should be noted that the maximum output level of the preamplifier is reduced by the amount of output attenuation (trim control) being used. For instance, if the trim is set to -6dB, the maximum output level of the preamplifier will drop from +26dBu to +20dBu. Since the LED peak indicator monitors signal level before the trim control it, will always monitor the actual preamplifier headroom regardless of the trim control setting. It is best to leave the trim control fully clockwise for normal recording operations. This ensures that the preamplifier will be operated at the minimum necessary gain setting.

101 specifications

Boulder Amplifiers has established itself as a leader in the premium audio amplifier market, renowned for its commitment to excellence in sound quality and innovative technology. Founded in Boulder, Colorado, the brand’s philosophy revolves around the idea that high-fidelity audio is paramount, and this is meticulously reflected in their amplifiers.

One of the standout features of Boulder Amplifiers is their fully balanced architecture. This design reduces noise and distortion, ensuring that the audio signal remains pure throughout the amplification process. The balanced circuit topology minimizes the impact of external interference, leading to a cleaner, more accurate sound reproduction, which is vital for audiophiles seeking the best listening experience.

Additionally, Boulder amplifiers boast exceptional power output and efficiency. Many of their models are capable of delivering high wattage ratings while maintaining low distortion levels. This means that they can drive even the most demanding speakers without compromising on sound quality. The amplifiers typically feature high current outputs that enable them to handle dynamic musical passages with grace, providing a robust performance across all types of music genres.

Another distinguishing characteristic is the use of premium components. Boulder Amplifiers utilizes meticulously selected capacitors, resistors, and transistors designed for superior performance. This attention to detail not only enhances reliability but also contributes to the amplifiers’ longevity and consistent sound quality over time.

The integration of advanced thermal management systems is also prevalent in Boulder’s designs. These systems ensure that the amplifiers operate under optimal temperature conditions, which is critical to maintaining sound integrity and protecting internal components from overheating.

Boulder’s commitment to craftsmanship is evident, as many of their products are handcrafted to ensure the highest standards of quality. The aesthetic appeal of the amplifiers is equally impressive; their sleek and minimalist designs exude sophistication, making them an attractive addition to any audio setup.

In terms of user experience, Boulder Amplifiers are built with intuitiveness in mind. Many models feature easy-to-read displays and straightforward controls, allowing users to focus on enjoying the music rather than navigating complex settings.

Ultimately, Boulder Amplifiers represent the pinnacle of audio engineering, combining cutting-edge technology with exceptional craftsmanship to deliver an unparalleled listening experience. Whether for a dedicated audiophile or a music lover seeking the best sound, Boulder Amplifiers set a standard in the high-end audio market that continues to inspire.