Tim Bailey’s turntable suspension method is a specific and finely tuned way of adjusting the sub-chassis, which allows you to achieve maximum stability, vibration isolation, and smooth operation of a vinyl turntable with a floating chassis. The method has gained popularity among audiophiles and restorers, especially when working with models such as the Thorens TD 160, Linn Sondek LP12, AR XA, and others, where the sub-chassis is mounted on a spring system. Tim Bailey proposed a practical and logically sound approach to adjusting these springs in order to achieve a perfectly balanced and stable “floating island” on which the disc and tonearm are located.
The essence of the method is to achieve maximum vertical movement of the sub-chassis — without lateral swaying, skewing, or vibration resonance. Most turntables with a suspended platform have three screw springs that simultaneously hold the chassis and allow it to “float.” However, factory assembly often suffers from inaccurate adjustment, and the springs can “sag” over time, causing imbalance and resonances that are audible in the sound.
The procedure begins with complete disassembly and cleaning of the suspension components. The springs are removed, cleaned of dust and corrosion, and replaced with new ones if necessary. It is also important to ensure that the bushings, washers, and gravity compensators (if applicable) are in good condition. Before installation, it is advisable to calibrate all three springs for stiffness — the ideal situation is when they all give the same response under the same compression. This can be done using micro scales or simple measurement under the same load.
Installation begins with the springs being positioned so that their axes are not directly symmetrical to each other. Tim Bailey suggested rotating each spring around its axis until they begin to work “purely vertically,” without transferring torsional forces to the subchassis plane. This fine tuning gives the maximum effect. This is especially important for turntables where the tonearm is off-center, causing uneven loading.
The key step is adjusting the “jump.” When the subchassis is pressed in the center (without the platter and tonearm pressed down), it should bounce vertically upward, smoothly and evenly, without swaying sideways. When properly adjusted, the system makes 3-5 “jumps,” gradually damping strictly up and down. If the movement deviates diagonally or twists, it means that one or more springs are not aligned along the axis, or the mass is distributed incorrectly. Tim Bailey insisted that this is the key to proper sound — vibrations from the motor, external noise, and the turntable’s own resonances will be suppressed by the balanced operation of the suspension.
After that, the disc and the clamping weight (if any) are installed, and the height of each spring is adjusted with screws to achieve a horizontal position of the upper platform. Next, the tonearm is adjusted, and the clamping force, VTA, and anti-skating are corrected. After complete assembly, the “jump test” is repeated — now with full weight. If the suspension is working correctly, the subchassis continues to move vertically even under full load.
Tim Bailey’s method is meticulous and attentive to micro-details, but it is precisely this that allows you to get the most out of the turntable. Practice has shown that a suspension correctly adjusted using this method not only reduces background noise and vibrations, but also improves overall dynamics, spatial soundstage, and sound depth. Vinyl “comes to life” and becomes more stable, even if the record is slightly warped or the motor has micro-vibrations.
Technicians working with Thorens, Linn, and similar equipment note that Bailey’s method is especially important when using sensitive MC cartridges and tube phono preamps, where even the slightest vibrations affect the sound. As a result, Bailey suspension becomes not just a technical procedure, but an important step in the precise tuning of an audio system, bringing the sound closer to live and natural reproduction.