Chinafreak
Posts: 7
Joined: Sun Dec 21, 2014 12:38 am

Speaker too quiet

Fri May 08, 2015 7:49 pm

Hello Guys,

I've there a speaker bought from conrad, they have:

- 87dB
- 8Ω
- 0.5W
- 320Hz

It's work all fine. I've already soldered everything. But what bothers me that the speakers plays music too quite. Raspbian (RetroPie) audio volumen is on 100%.
I've taken tutorials from adafruit:

https://learn.adafruit.com/cupcade-rasp ... ce-circuit
I'm using these component:

10K resistors
100 µF capacitor
TS922 - DIP-8

Does anybody know why my speaker playing music so quite? I've used my old, broken 3DS speaker and it's playing still too quite as normal.

I'd love to get some answers. :)
Thanks,

- China

PiGraham
Posts: 3391
Joined: Fri Jun 07, 2013 12:37 pm
Location: Waterlooville

Re: Speaker too quiet

Fri May 08, 2015 8:06 pm

You really need an amplifier. The audio out from the Pi is line level and not enough to drive a speaker with any volume. Use an amplified speaker or an amplifier module.

Sleep Mode zZ
Posts: 319
Joined: Sun Aug 19, 2012 5:56 am
Location: Finland

Re: Speaker too quiet

Fri May 08, 2015 8:14 pm

PiGraham wrote:You really need an amplifier. The audio out from the Pi is line level and not enough to drive a speaker with any volume. Use an amplified speaker or an amplifier module.
TS922 - DIP-8 is an amplifier, I think.

Chinafreak
Posts: 7
Joined: Sun Dec 21, 2014 12:38 am

Re: Speaker too quiet

Fri May 08, 2015 8:29 pm

Sleep Mode zZ wrote:
PiGraham wrote:You really need an amplifier. The audio out from the Pi is line level and not enough to drive a speaker with any volume. Use an amplified speaker or an amplifier module.
TS922 - DIP-8 is an amplifier, I think.
Yep, it is.

User avatar
Burngate
Posts: 5404
Joined: Thu Sep 29, 2011 4:34 pm
Location: Berkshire UK
Contact: Website

Re: Speaker too quiet

Sat May 09, 2015 10:23 am

Chinafreak wrote:
Sleep Mode zZ wrote:
PiGraham wrote:You really need an amplifier...
TS922 - DIP-8 is an amplifier, I think.
Yep, it is.
- but it's being used at a gain of 1.
Adafruit don't seem to provide a proper diagram, but it looks like the addition of a couple of resistors should up the gain to something larger.
Of course you'll still be limited by the 5v supply and the 8Ω of the speaker - 0.4W

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