DH110

About the DH110

The Hafler DH-110, produced from the early 1980s to the early 1990s, is a well-regarded stereo preamplifier that replaced the DH-101. It features a clean and low-noise design with a frequency response of 20Hz to 20kHz and extremely low total harmonic distortion of 0.001%. The preamp includes a headphone amplifier (though not very loud), a muting circuit to prevent thumps, a mono switch, defeatable tone controls, a rumble filter, and an external processing loop. It offers two phono inputs, tuner, CD/video input, two tape recorders, and multiple outputs including two tape outputs, two line outputs, and headphone out. The unit is built with 30 transistors, 3 ICs, and other components, housed in a copper-coated chassis for interference protection. While it is praised for its musical accuracy and dynamics, some users note the headphone amp's limited power and large volume step increments at low levels. The DH-110 pairs well with the Hafler DH-120 amplifier and is considered a great value for its price, competing well with more expensive mid-range preamps. It was available both as a DIY kit and fully assembled. Dimensions are approximately 17 x 3 x 8.5 inches, weighing about 10 lbs. The unit is no longer manufactured but remains popular on the used market.