Recent content by PeterOS

Cheers Chris Many thanks and one hell of a problem solved for me. I'll take it that it was inbetween 1.75" and 2" anyway.

Would some PLEASE measure the radius of the flare on the 3" percision port. I have tried asking before but no luck, so try, try again. I just need to get the measurement to show a few lecturers in college the diff of airflow between a straight port and a deisgned flared port. It would cost me...

Hi Chris, As you asked there, I wasn't even wearing ear plugs ( a bit stupid) but since is was out side it didn't seem to be that loud. Inside a room I can get everything to vibrate so at least I know there is a fair bit of power there. I still think that the SPL readings I got sound a bit OTT...

Just doing a bit of research here on flared ports and have my hands on some decent software in college (a few of ye have mentioned it before I think, ALGOR). I have done a few analyses on 3” ports with no flare, 30mm, 40mm, 50mm and 60mm radius flares. I used a frequency of 16Hz since this...

Any help with these would be appreciated 1. Using a tempest in a approx 200 vented enclosure, what Fb would you use which would give really good sound quality (ignoring SPL) and which would give you really high SPL (igoring sound quality and a very low Fb) 2. Is there any physical way of...

Cheers for the reply Pete Just to be clearer, are you saying the the value for Xv is equal to the volume or the mass of the vent. The equations therefore being vol = (pie * radius^2 * length) or mass = (pie * radius^2 *length)*density Ex. For a vent of radius 3.75cm (diam 3") and length...

Hoping some one might be able to help me out here. I want to find out what is the actual pressure build up inside a subwoofer, more specifically my Tempest Adire aligment. I want to do an analysis of how much the MDF moves under the pressure generated using ALGOR (its a Finite Element Analysis...

Cheers Jeremy, You just hit the nail on the head. One prob though the link won't Link Removed I don't know how much detail it goes into (if its worth while), but if anyone knows if the link has been changed could they let me know Thanks again

Some might reply saying why bother building a different design, there is loads out there for the Tempest. Simply I need to come up with my own design because I need something that is smaller than the 194L SBB4 design but I also want it to be vented. I wanted something that would be about 140L...

Cheers for the speedy replies, lads

I don't know how many of ye would have seen it but anyway. I am trying to design my own box for my tempest (kind of as part of college project), i read somewhere before of the dimension ratios that can be used that will reduce standing waves in the box. It was something like...

A question maybe for the serious DIY’ers or engineers. (A bit of a story but any help and I'ld be chuffed) I have just started my final year for my degree in engineering here in Ireland. As a final year project, I was hoping to make a injection mould for a extendable flared port for a...

My tempest arrived yesterday but am still waiting on my PE plate amp 250 watt from Parts Express. I am dying to try it out right now so is it alright if I hook up my ordinary hifi to the driver. It is 2 X 100watts @ 8 Ohms. If i feed in the LFE channel from my dvd player into the hifi and...

Since I am going to order my Tempest (15" driver) within the next few days and a Parts Express 250watt plate amp, I will start the MDF cutting any day soon to be ready for the sub. I done up a drawing of the sub in SolidWorks (if any of ye recognise this piece of software, its excellent). It is...

It should like you skip any intro's and warnings. Probably like the Pioneer players