CIRCUIT CALIBRATION

Bias:

!Qualified Service Personnel Only

The bias control establishes the quiescent Class AB output current of the amplifier. The bias should not need readjustment from the factory setting: however, if the amplifier is repaired and the output devices have been changed, calibrating the bias is necessary. Disconnect the power to the amplifier before removing the heatsink assembly from the speaker cabinet. To adjust the bias, remove the jumper TP1 and connect an ammeter across the exposed pins. Adjust trimpot R9 fully counter-clockwise before reapplying power to the unit. After the Soft Start turn-on has settled, note the ammeter reading. Adjust R9 until an additional 50mA is added to the ammeter reading. Replace jumper TP1. If the green power LED is not illuminated, apply a low frequency input signal to the amplifier input to activate the signal sensing turn on circuit. Be sure to remove the signal before adjusting the bias.

WARNING: Only a competent technician should attempt the above procedure.

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Hafler TRM10S, TRM12S manual Circuit Calibration

TRM12S, TRM10S specifications

The Hafler TRM12S and TRM10S are two standout models in the world of professional studio monitors, designed to meet the demands of sound engineers, audiophiles, and music producers. Known for their exceptional performance and clarity, these monitors are integral to contemporary studio environments.

The TRM12S is equipped with a robust 12-inch low-frequency driver, ensuring deep bass response. This model has been tailored for larger spaces, delivering an impressive output that doesn't compromise on precision. It handles low-end frequencies adeptly, making it ideal for electronic music production, film scoring, and any genre where bass fidelity is paramount. The wide dispersion pattern of the TRM12S allows for a consistent listening experience across different positions in the room.

In contrast, the TRM10S features a slightly smaller 10-inch low-frequency driver, which is perfect for smaller studio setups or for users who prefer a more compact design without sacrificing sound quality. Despite the size difference, the TRM10S still offers profound bass response, making it versatile for various applications, from mixing to casual listening.

Both models utilize Hafler's proprietary technologies, including advanced, high-efficiency amplifiers that provide clean, high output with low distortion. This enables the monitors to produce a wide dynamic range, making it easier for sound engineers to make critical mixing decisions. The integrated DSP (Digital Signal Processing) allows for precise tuning of the audio output, which compensates for any deficiencies in the acoustics of the space.

Another key feature of the TRM series is the adjustable room compensation settings. This functionality empowers users to tailor their monitor settings based on room dimensions and placement, ensuring the optimal playback environment.

Moreover, both the TRM12S and TRM10S are built with durability in mind, featuring rugged enclosures that minimize resonance and vibration, resulting in a clearer audio reproduction. Their sleek design ensures they blend seamlessly into any studio décor, while providing professional-grade sound quality.

Overall, the Hafler TRM12S and TRM10S are designed for professionals seeking reliable, accurate monitors that excel in delivering unparalleled sound fidelity. Their combination of advanced technology, thoughtful features, and solid performance makes them a worthy investment for any serious studio setup.