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The Hafler PH60 is a high performance phono stage for moving coil cartridges that combines a class-A transformerless head-amp design with a well defined RIAA curve to preserve and transmit the original program material with minimal coloration. Due to the extremely low signal level produced by moving coils, particular attention has been applied to reducing noise while retaining the purity of the signal path to address the most demanding audiophiles.
The design begins with a 14 gauge steel casing to shield the low level signals from external magnetic fields and RF contamination. Gold-plated input and output RCA connector pairs are employed that will not tarnish over time, thus optimizing signal flow. Inside, the solid-state circuit and military grade PC board have been optimized by carefully positioning parts for minimal self-noise and cross-talk and then supplemented with a ground plane to reduce susceptibility to RF. An external supply further reduces noise by removing the power transformer from inside the casing.
Inside, a series of jumpers enable the user to match the impedance of the cartridge with the PH60 to maximize the frequency response and reduce distortion. These are set during hookup and can be changed later should one decide to change to a new moving coil cartridge.
Front panel controls include a power on-off switch and a low-cut filter that may be inserted into the signal path when needed. This enables the user to reduce low frequencies that can cause resonance and feedback when playing music at higher levels. This helps eliminate both airborne and solidly coupled transmission of vibrations that can enter the stylus and cause feedback, rumble and distortion.
Compact and ‘plug and play’ easy to use, the PH60 follows Hafler’s 50 year tradition of building the very finest audio products for the most demanding high fidelity enthusiasts.
No. The PH60 is designed for moving coil (dynamic) cartridges. For moving magnet designs, the Hafler PH50 is the proper choice.
No. Your phono stage is equipped with an RIAA equalization curve, as is the PH60. Using two of these EQ's in series would seriously degrade the sound and the signal would likely be distorted due to the level mismatch.
No. It is built into PH60 and is part of the circuit board
High impedance cables are generally more prone to picking up noise from radio frequencies and magnetic fields. Thus keeping the cables shorter is beneficial. As a rule, try to keep the output cables from the PH60 under 2 meters (6‘) in length.
The low output from a turntable requires a lot of gain to bring it up to a suitable level. This also makes the circuit much more prone to noise. The transformer in a power supply generates hum which if not kept in check can generate noise. By moving the power supply outside the casing significantly reduces noise.
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