Goldline ZM-1
The Goldline ZM-1 is a lightweight battery powered impedance bridge designed specifically for testing speaker loads. It reads out in either ohms or calculated watts for the chosen voltage. Voltage choices are 25, 50, 70 and 100. Tests can be made at 100Hz, 330Hz, 1KHz and 10KHz. It operates on eight AA batteries and an optional carrying case is available.
Goldline ZM-1P
The Goldline ZM-1P is a lightweight battery powered impedance bridge designed specifically for testing speaker loads. It is similar to the ZM-1 but it adds an overload protection circuit and the ability to output its tones at line level. It reads out in either ohms or calculated watts for the chosen voltage. Voltage choices are 25, 50, 70 and 100. Tests can be made at 100Hz, 330Hz, 1KHz and 10KHz. It operates on eight AA batteries and an optional carrying case is available.
Goldline ZM-2N
The Goldline ZM-2N is an impedance bridge designed specifically for testing speaker loads. It has all the features of the ZM-1 but it adds the ability to output its tones at a higher speaker level for more accurate performance in noisy environments as well as a rugged carrying case with a removeable lid for use in tight spaces. It reads out in either ohms or calculated watts for the chosen voltage. Voltage choices are 25, 50, 70 and 100. Tests can be made at 100Hz, 330Hz, 1KHz and 10KHz. It operates on sixteen AA batteries or AC power.
