Although more complex and costly, servo-balancing has many advantages over conventional balanced circuits. The input impedance of 100KOhms allows bridging over 600 Ohm balanced or unbalanced line with negligible loading effects. Front panel switchable 600 Ohm load allows for input line termination when required. The servo compensates for the voltage loss on one side so there is no 6dB loss of level as with other systems. The outputs are also short-circuit proof, so nothing is damaged if the wrong pins are grounded.
Output impedance is very low so long lines are driven effortlessly.
A front panel indicator will flash red when the balanced output level is 5dB below clipping. The 124 is housed in an all metal package which is compact and self-powered. Applications Two-way interface amplifier for connecting any unbalanced device such as a cassette deck, equalizer, CD player or DAT deck to the IHF inputs and outputs. The balanced inputs and outputs go to a studio console, patchbay or other line level equipment. The different gains and impedances are matched for optimal performance.