HOW TO SET UP A LOUDSPEAKER MEASUREMENT SYSTEM THE EASY WAY AND GET RESULTS LIKE THE PROS!
HARDWARE
Measuring impedance is pretty straight forward in Arta. After installation of Arta, use the application Limp (short for loudspeaker impedance) to set up your measurement system.
Construction of the jig should take you about 20 minutes. There are no surprises here. A plastic project box, 4 RCA panel mount connectors, 2 binding posts, a resistor >10 ohms, basic wires for soldering.
 
1. Connect the Transit to your computer.
 
2. Connect the mini plug/RCA cables between the Transit and the jig.
 
3. Connect a driver or a loudspeaker to the jig. See pic for connections.
MEASURING IMPEDANCE
1. Fire up the LIMP application, and follow the instructions from the manual to calibrate your hardware.
 
2. In the Set Up>Measurement screen, enter the value of the resistor used to construct the jig (Fig. D).
 
3. Click the "Start Rec" icon. You should end up with a phase/impedance graph as shown in Fig. E.
 
4. Click the "Stop Rec" icon, and copy the graph to a graphics application such as Photoshop, then save or print.
Figure D
Figure E