![]() |
|
Home · FAQ · New Posts · My Posts · PMs · Search · Members · Members Map · Calendar · Profile · Donate · Register · Log In |
![]() | Home > In Car Electronics > Let's install a soilpipe to Freelander's Sub! |
![]() ![]() |
|
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
Great write up. I am surprised that a phone's microphone will work that low.
|
||
![]() |
|
FL2Vano Member Since: 10 Jun 2020 Location: Moscow Posts: 26 ![]() ![]() |
Nothing is ideal.
|
||||
![]() |
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
If you have the 'Thiele-Small Parameters' ie data sheet for the speaker you can calculate the port length. Port area should be 1/3 of the cone area (Sd) for 1 port. 1/4 the Sd for 2 ports. 1/5 the Sd for 3 ports.
|
||
![]() |
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
I have done an Excel spreadsheet for the Thiele-Small Parameters. I can email the file if anyone wants it, PM me.
|
||
![]() |
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
Maybe worth an experiment with larger pipe (if possible) which will have a longer length.
|
||
![]() |
|
FL2Vano Member Since: 10 Jun 2020 Location: Moscow Posts: 26 ![]() ![]() |
Have you really checked it with water? The first idea to buy the second sub was about how to use water for volume checking. ![]() But I refuse it later due to there are too much holes in sub. My estimation for the first calculation was taken as V=20L. And as I had to increase the calculated port size from 150 mm to the fine-tuned 175 mm so your estimation with V=13 L looks more correct than mine. Based on your information my 50 mm tube looks an optimal Diameter for one port in sub with 6,5" speaker. ![]() PS I added more white sintepon inside sub to "increase" value and got around ~22L finally: ![]() IAM2.1 Level 3 Meridian Premium Surround Sound with Extra Upgrade |
||
![]() |
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
I had a quick guess at the volume. I have had it out of the car when I installed the acoustic insulation, but that was quite a while ago.
|
||
![]() |
|
FL2Vano Member Since: 10 Jun 2020 Location: Moscow Posts: 26 ![]() ![]() |
I see you really like "to think out of box" with a huge ready set of alternatives! As me.
|
||
![]() |
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
I do not have a 3d scanner.
|
||
![]() |
|
FL2Vano Member Since: 10 Jun 2020 Location: Moscow Posts: 26 ![]() ![]() |
I have started to wish about both 3D devices - 3D scanner and 3D printer...
|
||
![]() |
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
I sent a PM. Procrastination, mankind's greatest labour saving device!
|
||
![]() |
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
Best to learn 3d if you haven't done so to get one's head around polygons, I have a LightWave licence. A lot of people like Blender & its free. Procrastination, mankind's greatest labour saving device! Acoustic insulation ARB TPMS 3xARB air compressors After cooler Air tank On-board OCD pressure air/water cleaning Additional 50L fuel Carpet in doors ABE 2x1kg Waeco 28L modified fridge Battery 4x26ah Solar 120w Victron MPPT 100/20 DC-DC 18amps 175amp jumper plug Awning 6x255/60R18 |
||
![]() |
|
jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 5161 ![]() ![]() ![]() |
I'm not an audiophile but fascinated by this thread. In the past I changed speaker capacitors on my Octavia VRS on the advice of forum members with a marked improvement.
|
||
![]() |
|
Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4921 ![]() ![]() ![]() |
Well, firstly you can get some really ugly sound if you don't get it right. It is far easier to have controlled sound in a sealed box which is very solidly built.
|
||
![]() |
|
![]() ![]() |
|
All times are GMT |
< Previous Topic | Next Topic > |
Posting Rules
|
Site Copyright © 2006-2025 Futuranet Ltd & Martin Lewis
![](../images/layout/footer/disclaimer.gif)