Speaker Tester - sweep NF generator

In automatic mode, the device waits for a speaker to be connected—the electrical connection is detected, and a “sweep sine” tone is played through the speaker — a gradually swept sine wave within the set range, which can optionally pass through a low-pass or high-pass filter with adjustable slope.

If the operator detects a problem with the speaker’s function by ear, the device can be switched to manual mode, in which the generator’s output frequency can be controlled using a large, ergonomic control knob.