Speaker testing device with adjustable sinus frequency
OMNITRONIC LH-095 Speaker Checker

You will be in control!
The scene: a bestower of hi-fi equipment gets back some speakers from a customer who affirms, that nothing happened and the speakers are allright. Trust is good, but control is still better. But how do you check if speakers are really ok? Now, the LH-095 is entering the scene. Without great effort, it is testing the frequencies and - if we stick to our example - gives clear statements and thus much more certainty to the bestower. Also not bad: a handy clip, that securely and comfortably attaches the speaker checker to a belt.