Author Topic: Need suggestion to make my speaker provide a louder sound  (Read 197 times)

0 Members and 1 Guest are viewing this topic.

mouthigh

Need suggestion to make my speaker provide a louder sound
« on: March 08, 2017, 11:31:09 PM »
I want to use LM386 (http://www.kynix.com/uploadfiles/pdf2286/LM386M-1.pdf) to drive a 5W 8ohm speaker. But the speaker cannot make a loud sound. So I need your suggestions for making the speaker louder.

And here are my guesses:

    1.Add a transistor to LM386
    2.Reduce the power of the speaker through the circuit?
    3.Or should I choose another IC to replace LM386?

I used TDA2005 before, but the 7805 chip was easy to burn during the process. Also it makes a terrible noise.

Now the sound quality is better by using LM386, but it cannot produce a loud sound...

I really need your suggestions. Much thanks if you can help me!

hyped

Re: Need suggestion to make my speaker provide a louder sound
« Reply #1 on: March 08, 2017, 11:44:09 PM »
What kind of speaker are you trying to drive ? What's the sensitivity of the driver and also ohmns


Sent from my 486 IBM WIN 3.1x Desktop...

deadastronaut

Re: Need suggestion to make my speaker provide a louder sound
« Reply #2 on: March 08, 2017, 11:46:09 PM »
Checkout the "punch 1 watt amp"

Much better than the 386..
http://www.youtube.com/user/100roberthenry
http://deadastronaut.wix.com/index

^ NANO-8 /CHASM REVERB / TREMSHIFTER / FAZE FILTER/ABDUCTOR II DELAY pcb's + WAH LIGHT PLATES.

Marcos - Munky

Re: Need suggestion to make my speaker provide a louder sound
« Reply #3 on: March 16, 2017, 03:37:35 PM »
Sent from my 486 IBM WIN 3.1x Desktop...
Wait, what? :o 8)


To answer the question, basically you're getting the loudest sound you can get with this amp and this speaker. Adding a transistor gain stage will only overdrive your guitar signal.

What you can try:
1. try another speaker. Even the LM386 provides just 1/2W, the speaker's sensitivity makes some difference. I use a 386-based amp connected to a 5" speaker as a "test amp", and when I connect the same 386 amp to a 4x12, the output sound is louder. More speaker's sensitivity = more mass of air in movement = more volume.
2. try another amp. Since you're using a 5W speaker, you can try amps up to about 4W.

I used TDA2005 before, but the 7805 chip was easy to burn during the process. Also it makes a terrible noise.
Why did you used an 7805? It's a 5V regulator, and the TDA2005 requires a minimum of 8V, it won't work with 5V.