Hi,
I just assembled a "Stereo Listener" kit from Velleman (PMK136). But
the thing really needs its bass attenuated to be useful in the
application I planned for it. It is based around the TI NE5532P "Dual
Low-Noise Audio Amp" chip and uses two generic electret cheapo mics.

Anybody here know which components to sub or add in order to help this
otherwise useful circuit?

I'm going to cross-post this to s.e.design too.

Thanks.

--Maxx

"Max Krippler" <planet10@socal.rr.com.com> wrote in message
news:c0gjc3dmf95008oqfhgberpfnv5sqg6hom@4ax.com...
> Hi,
> I just assembled a "Stereo Listener" kit from Velleman (PMK136). But
> the thing really needs its bass attenuated to be useful in the
> application I planned for it. It is based around the TI NE5532P "Dual
> Low-Noise Audio Amp" chip and uses two generic electret cheapo mics.
>
> Anybody here know which components to sub or add in order to help this
> otherwise useful circuit?
>
> I'm going to cross-post this to s.e.design too.
>
> Thanks.
>
> --Maxx
Its a good bet many here could help if we could see the circuit.

Tom

On Mon, 20 Aug 2007 15:23:56 -0400, "Tom Biasi"
<tombiasi@********optonline.net> wrote:

>
>"Max Krippler" <planet10@socal.rr.com.com> wrote in message
>news:c0gjc3dmf95008oqfhgberpfnv5sqg6hom@4ax.com...
>> Hi,
>> I just assembled a "Stereo Listener" kit from Velleman (PMK136). But
>> the thing really needs its bass attenuated to be useful in the
>> application I planned for it. It is based around the TI NE5532P "Dual
>> Low-Noise Audio Amp" chip and uses two generic electret cheapo mics.
>>
>> Anybody here know which components to sub or add in order to help this
>> otherwise useful circuit?
>>
>> I'm going to cross-post this to s.e.design too.
>>
>> Thanks.
>>
>> --Maxx
>Its a good bet many here could help if we could see the circuit.

---
I'd love to see it, but I couldn't even find the kit at Velleman's
website under "PMK136" or "Stereo Listener".


--
JF

Max Krippler wrote:
> Hi,
> I just assembled a "Stereo Listener" kit from Velleman (PMK136). But
> the thing really needs its bass attenuated to be useful in the
> application I planned for it. It is based around the TI NE5532P "Dual
> Low-Noise Audio Amp" chip and uses two generic electret cheapo mics.
>
> Anybody here know which components to sub or add in order to help this
> otherwise useful circuit?

There is probably an input coupling capacitor between the
MIC input and the opamp. If you reduce the size of that
capacitor, you will roll off more bass.