I'm using a LM386 amplifier to drive a 2 1/2 inch loudspeaker, and I wan't it to have a 3dB bass "booster" (works more like a trebble atenuator). The frequency is about the same, so in the RC circuit (from pin 5 to 1) I'm using a 33nF cap as sugested. But I will use a 39K to have an atenuation of about 2.8dB (15K is sugested in the NS datasheet for a 6dB attenuation). Am I doing the calcutations correctly?
Also I tested the 6dB bass boost with a cheap 3 inch speaker but that sounded abusive to me (loss of detail comparing with no boost at all). Is it ok to use a 3dB bass boost with a smaller (2 1/2 inch) speaker?
I already know that the high frequencies will be limited, but with the minimum gain the amplifier is already saturated at the maximum volume.
Datasheet: http://www.national.com/ds/LM/LM386.pdf
Also I tested the 6dB bass boost with a cheap 3 inch speaker but that sounded abusive to me (loss of detail comparing with no boost at all). Is it ok to use a 3dB bass boost with a smaller (2 1/2 inch) speaker?
I already know that the high frequencies will be limited, but with the minimum gain the amplifier is already saturated at the maximum volume.
Datasheet: http://www.national.com/ds/LM/LM386.pdf