Rane MS1S MS1S Mic Stage Manual - Page 17

COMMON (WRONG) PRACTICE (+) CASE 2 3 (-) 1 RECOMMENDED PRACTICE CASE (+) OPTIONAL 2 3 (-) 1 CHASSIS GROUND SIGNAL GROUND CHASSIS CHASSIS GROUND GROUND Figure 1b. Recommmended practice. The Next Best Right Way To Do It The quickest, quietest and most foolproof method to connect balanced and unbalanced is to transformer isolate all unbalanced connections. See Figure 2. Many manufacturers provide several tools for this task, including Rane. Consult your audio dealer to explore the options available. The goal of these adaptors is to allow the use of standard cables. With these transformer isolation boxes, modification of cable assemblies is unnecessary. Virtually any two pieces of audio equipment can be successfully interfaced without risk of unwanted hum and noise. Another way to create the necessary isolation is to use a direct box. Originally named for its use to convert the high impedance, high level output of an electric guitar to the low impedance, low level input of a recording console, it allowed the player to plug "directly" into the console. Now this term is commonly used to describe any box used to convert unbalanced lines to balanced lines. UNBALANCED BALANCED NOT CONNECTED AT CHASSIS (PLASTIC JACK) TRANSFORMER 1/4" TIP-SLEEVE 2 3 1 CASE LUG MAY CONNECT TO CHASSIS (NOT REQUIRED) EARTH GROUNDED METAL ENCLOSURE CHASSIS IS GROUNDED TO PIN 1 Figure 2. Transformer Isolation 17