Building my first speaker, advice

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Hi,

Im thinking about building my first speaker, I already have designed a vented box that is tuned around 40 hz. I want to put 2 Dayton audio nd105-4 4" drivers in the box and a plate amplifier, i was thinking about the Dayton audio SA25 25w. Would this be enough power for both drivers? Does anyone have tips for puting the box together?

I would appreciate your help!
 
Op,
How can you design a vented box tuned to 40 Hz if don't know the best for the driver you are using? WHAT'S THIS??? What is the net volume of that speaker anyway. You forgot to mention... An ALIGNMENT is a (1) Volume net Vb and a tuning (2) frequency Fb!!!
 
I saw videos on YouTube of people using the nd105-4 4" as a subwoofer, so i want to build a small subwoofer. Or maybe if you have other suggestions for good drivers i could use other drivers. But my budget is €150 (because it is my first build)
 
Hi,

BEYMA 8WOOFER/P-V2 pdf, VB = 85.0 L, FB = 28.0 Hz
F3 (in room): 23.5 Hz
Ports (diam/length): 1x9.4 cm/24.11 cm or 2x7.4 cm/31.72 cm.
(Surfaces PS1 : 69.40 cm2, Surfaces PS2 : 86.02 cm2)
With the two port option, less chuffing.
 

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It is a driver for 50W. If using at max SPL or having a very powerful amp 75-100W then ports should be calibrated for the same power or use the double port 3"-4".

Volume displaced by driver: 1.5 L
Volume displaced by (2x) 3" ports: 3 L
Total driver + 2 ports : 4.5 L
VB 85.0 L net + 4.5 L = ~90 L
 
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