Enclosure for Hertz ES 300D - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 5th July 2013, 12:14 AM   #1
diyAudio Member
Join Date: Jul 2013
Default Enclosure for Hertz ES 300D

Hey all First time poster.

I'm building a subwoofer for my car. The cabinet is going to be just around 90 liters.

Inner dimensions, a sloped prism(back of the enclosure being sloped);
Width = 800mm
Bottom Depth = 379mm
Top Depth = 281mm
Height = 356mm
~90 liters, after accounting for a bit of bracing, port and woofer itself.
I'm going to use 22mm MDF.

I'm considering porting it using a rectangular port. The port would fill the entire height of the enclosure, 356mm. Port width would be 50mm. WinISD calculates port length to be 499mm, at mach 0.06 or 20.4 m/s.

Is this port speed too high? If I were to mount the woofer in the middle of the cabinet, I wouldn't be able to run the port by the width of the woofer, but I would be able to run it towards the sloped back, making a turn and run it back
like in this picture(on the right)Click the image to open in full size.

How would this affect performance, would it create any port noise at these air speeds?

Would a flared port be a good idea due to "high" air speeds? If so, how large would I need to make the flare? Around the double of the port width?

Last edited by Spookybear; 5th July 2013 at 01:07 AM.
  Reply With Quote
Old 6th July 2013, 02:57 PM   #2
DrDyna is offline DrDyna  United States
diyAudio Member
DrDyna's Avatar
Join Date: May 2007
Blog Entries: 3
YMMV, but one of the side benefits I've noticed after doing a couple of car enclosures with the L shaped slot port is that being in the trunk does a great job of masking small amounts of port chuffing sounds. I've never heard any chuffing with 15" drivers (driven to near clip with 750D RF amps) and 3" x 18" slot ports.

At 50mm, I might try to make it a little bigger, see if you can calculate it using 70 or 80mm width.

I don't see any reason why you couldn't fold the port around as you've drawn, unless there's something I'm not aware of.
  Reply With Quote
Old 9th July 2013, 04:58 PM   #3
diyAudio Member
Inductor's Avatar
Join Date: Feb 2006
Location: Cascais
2 x PR vs Ported
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
4th order enclosure for 2x Hertz HX300D grakka Car Audio 2 21st December 2012 09:24 AM
Nikko A-300D Hybridization! Sacrilegious? Ronj Solid State 12 3rd September 2012 04:09 AM
Nikoo A-300D, recapping dilemma... Ronj Solid State 21 1st September 2012 06:35 PM
Greg Ball SKA 300D amplifier nycavsr2000 Swap Meet 4 1st February 2010 06:12 AM
WAF : which enclosure for FE 206 ES-R ? sierra_gva Full Range 17 9th January 2007 09:00 PM

New To Site? Need Help?

All times are GMT. The time now is 01:39 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2