Thanks for the detailed information everyone. There are lots of good options there, I couldn’t make up my mind for a while whether to go with single or double Dayton RS225-8, single RS225-4, or single or double Peerless HDS 8” Nomex.
I’ve ended up ordering one pair of the Peerless 8” drivers, just have to work out whether to do a small sealed enclosure or to try a large vented... Maybe a small sealed for now.
I definitely like Dave’s idea of the short tapered transmission line enclosure, it should look good as well as performing well, Thanks Dave.
Cheers,
Matt
I’ve ended up ordering one pair of the Peerless 8” drivers, just have to work out whether to do a small sealed enclosure or to try a large vented... Maybe a small sealed for now.
I definitely like Dave’s idea of the short tapered transmission line enclosure, it should look good as well as performing well, Thanks Dave.
Cheers,
Matt
I've done a similar project including a mid transmission line. The top box is removable. My top box space is quite large to give me flexibility. If I were to build in either the tapered TL or use a plastic pipe (such as in the Halcyon design) it would save a lot of volume. Going sealed on the woofer would also save a lot of volume and would be the way to go with active subs on hand.
The woofer is a Monacor SPH 8M. Probably not as smooth on the top end as the Dayton but is a flexible driver that is suitable for BR or sealed. Sealed could go as low as 10 litres with a Q < 1.0. (About 20 litres for 0.707). I am currently using BR of 46 litres. I've incorporated a removable panel on the back with the port in it. I could covert to sealed with a Q of about 0.6, good for transient response.
The woofer is a Monacor SPH 8M. Probably not as smooth on the top end as the Dayton but is a flexible driver that is suitable for BR or sealed. Sealed could go as low as 10 litres with a Q < 1.0. (About 20 litres for 0.707). I am currently using BR of 46 litres. I've incorporated a removable panel on the back with the port in it. I could covert to sealed with a Q of about 0.6, good for transient response.
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The downside of a Mid TL is that you would not get any bass should you want to listen to pure full range. A conventional sealed would allow you to listen full range and blend in with subs. Something to think about. That's one reason why I went for a removable box, especially if I get a larger (5 to 6 inch) full ranger to play with I may want to listen full range occasionally.
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