An externally hosted image should be here but it was not working when we last tested it.

**Car speaker (Mid range):**

Size: 4"

Imp: 4 Ohms

Power (RMS): 50 W

SPL: 86 (dB/2.83 V/m)

Freq. Resp. 100 up to 8.000 Hz

An externally hosted image should be here but it was not working when we last tested it.

**Tweeter:**

Size: 2.5"

Imp: 4 Ohms

Sensitivity (2,83V a 1M): 108dB max. (0dB = 20µPa);

Max. Voltage (Pink Noise): 13V rms;

Power (RMS): 40 to 100W

Freq. Resp. 5KHz to 20 KHz;

Sound Dispersion: 90°.

Currently I don´t have the time to search or dig out the values to find out if I need a sealed or ported enclosure. So I decided to go with the sealed enclosure. This after seeing this video: Ported vs. Sealed - Detailed Comparison - YouTube

Apart from that, I don't have more specs than the ones I listed above, from the drivers; to research and construct the parameters table for these drivers. If anyone is have got those and would be willing to test them using some kind of software, I would appreciate.

*Box enclosure is:*

Height 224mm

Width 160mm

Depth 160mm

MDF 9mm

**Question 1:**

I am told that the tweeter overlaps into the mid-range from 5kHz to 8kHz.

Being that the two of the drivers are 4 Ohms, which would be the ideal frequency split for the crossover, considering the split to respect the octaves?

**Question 2:**

I am also told that the tweeter is 22dB louder than this mid-range and that I need to construct a driver attenuation for the tweeter. Considering that the tweeter will handle no more than full 30W RMS from the amplifier, what value for maximum power should I apply in the calculation of this attenuation circuit?

**Question 3:**

Will I need this enclosure to be definitely ported because of the heat dissipation from the attenuator?

NB: This is really a small project for a computer speaker. I don't plan to have all the meticulous details done nor expect it to be perfect professional. Just want some basic help to not make any gross mistake.