I'll most likely run in a ported configuration. I'd like these to reach down into the low 30's at least. Seems reasonable as the fs is 25 Hz, but perhaps I'm wrong. I'd appreciate any thoughts you'd like to share.

Thanks in advance!!

The Fostex F200 reminds me of the JBL 2115 and the FW305 reminds me of a 2205, 2225 or 2226. In fact, the cabinet you should use is exactly the same except for the woofer cutout. I haven't used Fostex drivers, but I can tell you that list of JBL's is my all time favorites, so I am pretty optimistic about what the comparible Fostex drivers must sound like.

The Fostex FW305 is best used in cabinets from 1.0ft3 to 4.0ft3 tuned to 38Hz. PiAlign suggests 2.25ft3 tuned to 38Hz, exactly like the JBL's. Put it in a Professional Series seven π cabinet and I'll bet it will sound great. If you don't have corners, put it in the Pro four π cabinet instead.

Thank you so much for the info! I tried to download PiAlign, but it looks to be a PC program, and I'm a Mac guy.

What I'd like to do, is to model different sized cabs (just curious to see what can be done/not done) and see how the curves look. For instance, if I tuned the box a little lower, (larger box?) how would that effect the curve?

If you don't mind, I'd appreciate plans for the Four Pi cab. Also, do you recommend any particular type of crossover? I was thinking a second order, but if a simple first order will work, that would be great.

Thanks again for all your help Wayne.

Layne

About time you came over and visited the Pi speaker forum. You will find a lot of useful knowledge here. This is where I started when I found the site during a google for "2205's".

Is your fullranger going to have a tweeter section on it??? Wayne can help you out on the crossover section if you give your requirements you need: ie: 12" or 15" bottome end crossover to FR with tweeter covering top end. Something like that with the driver details included helps out a lot.

I think the 4 pi-pro cabinets are the ones you are wanting. There are several 4 Pi systems, so it is necessary to select one. For the 2226 or equivalent, the "pro" version 4 pi is what you want.

Ron

I'm not sure I'll use a tweeter, depends on the amps I'll use. I do have a set of the Fostex T90a supertweeters I bought used that I'm sitting one, we'll see if i need them. With the 300Bs, I may need them. But, if I use a digital amp, I may not, as there's so much more top end there. Once I get these built, I want to get your Yamamoto 45 in my system for a listen.

As for crossover points, I have been wanting to roll the woofer off at around 200 hz, then bring in the full range. Not quite sure where to have it come in though. Nor am I sure just what kind of crossover to use. I do know I'd like to use just a cap on the fullranger, but could go second order if needed on the woofer. If I do bring in the supertweeter, I would probably just use a small cap and maybe an L-pad.

The thought here is to clean up the full ranger. I've read many times where the full ranger will greatly benefit from not producing the lower bass notes. It seems that while back loaded horns and such are still fairly popular with the full range crowd, more a leaning towards rolling off the bottom end in the full ranger and bringing in a big woofer. Thus, you get a cleaner and more defined bottom end as well as mids and high frequencies. As long as you don't cross too high, you shouldn't loose the point source imaging.

Thanks again for thoughts and help with this.

• Crossover Electronics 101