| Brand | Unbranded |
|---|---|
| Type | Audio Speaker Tester |
Check the listing for details. J-BOX III Audio Speaker Tester Frequency Response Impedance Measuring Box Kit. Condition: New. Listed at 113.00 USD. The J-BOX III has single ended (RCA) and balanced (XLR) microphone input interfaces, and the built-in MIC amplifier provides a gain of +15dB~+30dB to accommodate microphones of different sensitivities.