Porting

[Merton]

Hello! This is really for Alex and BFM (plus anyone else who knows).

So I'm going to be building a 1x15 cab which is designed to be identical to the 1x15 "cab" in my V-Type combo. Yes yes, small enclosure, not much bottom end etc, but I like the sound I get from it and it's bloody loud.

So the question is this. The combo is rear ported. I'm not convinced my woodworking skills are good enough/tidy enough to rear-port my cab, so therefore wondered about front-porting instead. This means I can hide the ports behind the speaker grille so any making good will be less obvious.

Suddenly the cabs are no longer identical, HOWEVER I do know that port position is a moot point (i.e. you can put them where you want them). But will it have any bearing on the phase relationships at f3 etc, if one is rear-ported and one front-ported?

My head says nay (i.e. it won't make a difference), but I want to have an expert tell me the truth, the whole truth and nothing but the truth

[Bill Fitzmaurice]

[quote name='Merton' post='284990' date='Sep 16 2008, 08:44 AM']But will it have any bearing on the phase relationships at f3 etc, if one is rear-ported and one front-ported?[/quote]No.

[Merton]

Perfect, cheers! Thought not, just needed clarification and couldn't think how to word it as a google search coz I'm having a thick year.

[david_l_perry]

[quote name='Merton' post='284990' date='Sep 16 2008, 01:44 PM'].... I'm not convinced my woodworking skills are good enough/tidy enough to rear-port my cab, so therefore wondered about front-porting instead. This means I can hide the ports behind the speaker grille so any making good will be less obvious.....[/quote]

I would use a port tube to give the hole a neat and finished edge, obviously the port tube can be cut to suit the length you need, or simply used to mask the hole edge

[Merton]

[quote name='david_l_perry' post='285040' date='Sep 16 2008, 02:19 PM']I would use a port tube to give the hole a neat and finished edge, obviously the port tube can be cut to suit the length you need, or simply used to mask the hole edge

[/quote]
Aye, but I can't find a port tube with the right diameter! So found some black pipe instead and cut two bits to size...

6cm diameter port tube anyone?

[EBS_freak]

[quote name='Merton' post='285065' date='Sep 16 2008, 02:34 PM']Aye, but I can't find a port tube with the right diameter! So found some black pipe instead and cut two bits to size...

6cm diameter port tube anyone?[/quote]

yup -

[url="http://www.lautsprechershop.de/hifi/index_en.htm?/hifi/rohre_en.htm"]http://www.lautsprechershop.de/hifi/index_...fi/rohre_en.htm[/url]

[Merton]

Smart arse

Nah, cheers for that