Pro-Ject 58g Counterweight (148)

Precision Counterbalance for Pro-Ject Tonearms

The Pro-Ject 58g Counterweight (part 148) is a precision-machined replacement and upgrade counterweight designed for use with compatible Pro-Ject tonearms, including the 9cc and 9cc Evolution series. Correct counterweight selection is essential: the weight must fall within the tonearm’s specified tracking force range so that the stylus bears down on the record groove at the manufacturer’s recommended force. Using a counterweight outside the appropriate range prevents accurate tracking force adjustment and can damage stylus or records.

Compatibility and Fitting

Part number 148 suits tonearms whose cartridge and headshell assembly falls within the mass range that this 58g counterweight can properly balance. To fit, slide the counterweight onto the rear stub of the tonearm, set anti-skating to zero, balance the arm to horizontal, then rotate the tracking force dial to dial in the cartridge manufacturer’s recommended downforce. Once set, engage the anti-skating control appropriately. Always consult the tonearm documentation to confirm the correct counterweight for your cartridge and headshell combination.

Construction

The counterweight is machined from dense alloy, providing stable, vibration-resistant mass. The threaded collar allows fine position adjustment along the stub for precise centre-of-gravity setting.

Specifications