Sub install Mercedes 500SL 1991,need help on design!

[lowesguy]

Hi all need your wisdom on this one! I'm old but new to the powered sub set up! here's whats up! purchased an amp and 8" sub,car is a convertible,sub will be mounted in storage area behind drivers seat,not the perfect choice of location,but trying to make it work! not much room to work with and trying to keep a clean look,don't want a big box or speaker in trunk! this is what I've done so far.

have the sub mounted to storage compartment door and now I need help on porting the compartment,the speaker I got fits nicely and is from Sundown audio and its made for small spaces and needs porting to work right. amp should be here next week and will be located in truck where battery is,just need to know where to port and how to do it??? was thinking of using round tube and hole in front,the size of enclosure is 16 wide 14 deep and 8-9 high,approx 1.3 cubic feet. I have a donner storage compartment ,so its easy to work on it out of the car,will be keeping my original one in the attic, here's pictures!

here's spec's on speaker and amp,should be around 200watts rms.

RE: 3.927 ohms

Fs: 43.59 Hz

Qes: 0.643

Qms: 4.404

Qts: 0.555

Le: 2.75 mH

Vas: 7.22 L

BL: 13.023

NA Cms: 131 uM/N

Mms: 101 grams

Sens: 81.53 1w/1m

Xmax: 10.5mm one-way linear

Power: 200 RMS

Enclosure reccomendations

Sealed: 0.25 ft^3

Ported: 0.5-0.6 ft^3 @ 35Hz

Displacement: 0.05 ft^3

Outside Diameter: 8 1/4"

Depth: 4 9/16"

Cut-Out: 7 1/4"

Amp is a

Precision Power PPI BK650.1D

650W RMS Monoblock Class D Black Ice Series Car Amplifier

Power Specifications - Subwoofer Channel

RMS Power @ 4 ohms

240 watts x 1 channels

RMS Power @ 2 ohms

450 watts x 1 channels

RMS Power @ 1 ohm

650 watts x 1 channels

Amplifier Specifications

Amplifier Series

Black Ice (Precision Power)

Amplifier Class

D

Number of Channels

1 - Mono

Total RMS Power Output

650 watts

Maximum Input Gauge Size

4 AWG

Minimum Impedance Unbridged

1 ohms

THD at Rated RMS Power

.5%

Speaker Level Inputs

No

Preamp Outputs

No

Built-in Crossover

Low-pass (LP)

High-pass (HP)

Low-Pass Crossover Frequency

35 - 250 Hz

Subsonic Filter

10 - 50 Hz

Bass Boost

0 - 12 dB

Bass/Gain Remote

Yes

Fuse Rating

Click to read more...

 

[lowesguy]

I tried using WinISD. but kinda lost! the 96-02 SL'S have factory Bose system bass located at same place but have a weird looking box in there,here's a pic. not mine just example

 

[lowesguy]

What am I doing wrong? help! check this out,its what I bought!

 

[lowesguy]

Just remeasured enclosure area and came up with 16w x 14 D x 7.5H,so guess that's 0.9 cubic foot, my SA sub requires 0.5-0.6ft^3,I'm subtracting 18% for volume of speaker and port,so have net volume of 0.7 , so came up with 11.808sq of port area.

so If I have a 1.5 X 6.75long, round tube for port,should be at 11.928ci.this sound about right?

 

[lowesguy]

Just took the hard top off and here is the area the sub is going to be.

 

[lowesguy]

Finally done,next is install,used 1.5x6.75 PVC for port@35hertz, and also just received my amp, its only a 240watt at 4 ohm.