Kinda confused with your post. Not sure why your are talking about tweeters et al.
My design is a sealed dual opposed driver design. It will be a passive sub, using an external amp.
It looks like there isnt anyone here who have heard of this particular peerless driver, or they havent seen my post yet
Sorry if I confused you. What I had intended to say is that I intend to go in for a pair of subs with dual drivers in either
*Push-pull mode (a la SL's ORIONs' bass section or his dipole sub here -
Dipole Woofer)
*Push-push mode (a la Axel Ridtahler's ripole sub here)
Also, my (either ripole/dipole or maybe a ripole with a passive radiator or two per subwoofer channel) subs would be twin bass modules on which either of the mid-tweeter panel designs that I have in mind would get propped/coupled to. So, the tweeter and mid part has nothing to do with your query, per se. maybe thats how I confused you, apologies for that.
Anybody who has been doing or even reading about DIY subwoofers is bound to have heard about the wonderful driver you mentioned. They are known for their 'air moving potential' due to more-than-usual excursion ie often to the tune of 13mm, IIRC. Now, AFAIK, they are great drivers for a ripole/dipole design which alongwith a high 'Xmax' , also need to have a relatively higher 'Qts'.
Further, a driver's suitability for various kinds of enclosures is indicated by the EBP factor, amongst others. Do bear in mind that these are indicators only and that exceptions do prove the rule. Here's an extract from this page
The Deep Discount / Knowledgebase / What determines the best type of enclosure for a paticular woofer (sealed, venterd, single-reflex or dual-reflex bandpass enclosures)?
QUOTE
Generally speaking, there are some speaker specifications that lend a driver to one type of enclosure over another, although most drivers are suited to more than one type of enclosure. ***These are generalizations and are NOT cast in stone!***
Woofers that perform best in sealed enclosures (or single-reflex bandpass) usually have a lower Fs, slightly higher Qts and more Xmax than woofers designed for vented (or dual-reflex bandpass) enclosures.
There is also a formula to calculate what is called the "efficiency bandwidth product" of a particular driver. The EBP of a woofer can be used as a guideline for the enclosure type. It is calculated with the formula:
EBP= Fs / Qes
EBP in the vicinity of 50 or lower indicates a sealed enclosure, while EBP of 100 or higher indicates a vented enclosure.
***Again, these are suggestions only, as the equations simply show a woofer's "preference". The best enclosure for you is the one you like the sound of best!***
UNQUOTE
The Peerless XXLS 12" and 10" drivers have an EBP of 88.5 and 101 respectively. If I were you, I would use a 12"(or two 8"/10") passive radiator(s) with a 10'' XXLS driver in a box. With the 12 '' XXLS, again, I would go in for a PR option. PRs are akin to ported enclosures minus that annoying port turbulence noise that ported designs are infamous for. Sealed designs OTOH, provide accurate and detailed bass but need more power (read EQ)in the ELFs.
Therefore, with small drivers, its better to go in for PRs, you get the best of both sealed and ported designs.
(I call 10 and 12 inchers small as I am lucky to have a 21 inch subwoofer driver [through a dear friend], thats also in the design-consideration stage, it might end up as a down-firing coffee table with a 10/12'' PR in each wall, maybe. . .)
Also, in case you decide to go in for a PR design, you won't need to go in for any of the firangi stuff. You can go in for these from Varsha Electronics in Mumbai
Products - PeerlessAudio.com
Products - PeerlessAudio.com
Products - PeerlessAudio.com
Also, since you said that you had a dual opposed sealed design in mind, I do take it that you will mount the drivers back-to-back on opposite walls of the cabinet, right? Now, If that be so, two questions that you need to answer:-
As you sit, which way would the drivers face ie back-to-front or left-to-right?
Would the opposing drivers be in phase or out of phase with each other? (IE would they be in push-push mode or in push-pull mode?)
Answers to these questions will help me contribute another two phooti Kaudies
Hope this helps
Cheerio
