The first impression: very high quality, clean and solid, the same applies to the bell, which is also handled beautifully.
So the same batteries in and try.
The volume can be adjusted continuously, rarely have I heard such a loud bell, hats off using potentiometer knob.
What in quiet tones not as striking are the resonances that gives the speakers to the chassis.
At higher volume, the tone of the speaker with the vibrations of the housing to a blechernden sound, especially in low tones together.
Alone due to the solid production I was this sound but very surprised, so be sure the same time the screws on the housing strength.
Everything is stuck, although housing vibrations :-(
So open the housing and inspect the screws of the speaker, but here everything is OK.
Since I own something I have knowledge of the matter made me to the insulation of the speaker.
To this end, I have precisely a piece of very soft foam made, the board capacitor, etc. into account and set the foam pad in the cavity between the speaker and enclosure.
Who says it because, now the bell sounds really perfect, significantly fuller and no tinny sound more, no matter what the volume!
Who the dams of the housing does not trust itself should not buy the product because of the price, the product of house should have a good sound.
Had I not even have to lend a hand then I would have given 5 stars.
My conclusion: The product is recommended only limited.
