Hafler TRM10.1, TRM12.1 manual Introduction, Technical Design Features

INTRODUCTION

Thank you and congratulations on your purchase of the HAFLER TRM10.1/TRM12.1 reference monitor, the world's finest brand in professional audio equipment.

The TRM10.1 (Trans•ana Reference Monitor) is an amplified 10" subwoofer monitor. The TRM12.1 is an amplified 12" subwoofer monitor. Both models offer unmatched quality and performance in a truly professional grade product. The TRM10.1/TRM12.1 are great for Professional Studios, Digital Work Stations, Broadcast Booths, and Home Project Studios.

Although we realize a professional such as yourself already knows a thing or two about pro audio, we urge you to read this manual to at least humor our technical writer. For ease of use, this manual is organized into three main sections: Installation, Operation, and Service Reference. “Installation” covers the set-up of your new HAFLER equipment in the system. “Operation” covers the controls and how to use them for optimum performance. “Service Reference” contains field service information useful for technicians and engineers.

TECHNICAL DESIGN FEATURES

The TRM10.1/TRM12.1 monitors utilize a specially designed amplifier featuring our innovative trans•ana circuitry. This topology, with its unique input-to-output configuration (derived from our patented trans•nova circuit), employs MOSFETs in both the power supply and output stages that result in superior sound quality.

The amplifier features an auto turn-on/off circuit that eliminates the need for a conventional power switch. Input sig- nals can be fed into the amplifier via Balanced XLR jacks (where long cable runs are used) or into standard unbal- anced RCA jacks (where short cable runs are used). Each pair of inputs is combined into a mono-summed signal before being fed into a 4th order Linkwitz-Riley low-pass crossover, variable from 40Hz–140Hz. If selected, the signal is then fed into the Phase Warp that allows the phase of the signal to be adjusted at 90˚, 180˚, or 270˚ increments.

The TRM10.1 features a 10" (254mm) low frequency transducer with a cone made from cellulose fibre. A santoprene rubber surround that is immune to temperature fluctuations controls woofer damping and reduces 2nd harmonic dis- tortions for a very wide and flat frequency response. The transducer also features a 2" (51mm) 4-layer copper voice coil wound on an aluminum voice coil former and is driven by a 30-oz. magnet. The TRM12.1 features a 12" (305mm) low frequency transducer made with the same cellulose fibre cone and santoprene rubber surround. The 12" transducer features a 2.5" (63.5mm) 4-layer copper voice coil wound on an aluminum voice coil former driven by a 102-oz. magnet.

Both the TRM10.1 and TRM12.1 are downfiring subwoofer models and are vented using a radiused Aerovent for reduced turbulence. The cabinet is made from acoustically dead 19mm MDF material and is internally packed with damping material to eliminate internal resonance.

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