Pre-amp and Class D amp (how to wire for SMPS)

[m0b1liz3]

So I have a class D board that I have had lying around for ages. I want to make a small box with 2 x 5" full range drivers for low volume guitar playing. I have a Helix Stomp (amp sim and effects). I want to be able to adjust the bass and treble on the amp because I suspect the small drivers will be lacking in bass. This is for relatively low volume playing so I just want to be able to tweak the bass/treble on the amp instead of the source (I could add extra eq blocks but the unit is limited in how many blocks you can use).

I am going to use an external laptop style power supply.

Actual question:

The preamp voltage is 12v. The amp module can be 9-24v. If I get a 12v external power supply, can I wire the socket to the pre-amp and the amp module with no issues? Or is there a more intelligent way to do this?

 

[russc]

You can use 12V supply for both - the power will be limited by the voltage supply.

You can use higher voltage supply for the power amp (say 18-20V laptop supply) and use a regulator to reduce to 12V for the pre-amp.

Regulators may be linear (LM317 based) or switchmode (buck).

 

[m0b1liz3]

I just realized that I have a lithium battery supply that might work. This Boxking power supply is supposed to have both 18v and 12v options. I actually have it running a pedal board currently but it is not perfect. There might be something better I can use for the pedal board and consider this one for the amp/premp?

BoxKing BK05 12800mAh PEDAL POWERBANK Rechargeable Portable Pedal Power Supply. Great Solution for Pedalboards and More.: Amazon.com.au: Musical Instruments

 

[russc]

You should say what the amp board is so folk can know the power requirements and advise accordingly.
Also speaker impedance.