Much thanks for the simulations. From the graph, it seems like the Peerless PR's are simply better performing than the Tang Band DIY in every way, some quite significantly. Looks like I will just use the Peerless PR's and set the limiter a little stronger to accommodate for the smaller Xmax.
Hi bcodemz,
Using Jeff Bagby's spreadsheet I end up w/ a total of 26.6 gms of added mass (13.3gm per PR) using 2ea. Peerless 830880 PR, and 1ea. Wavecor WF152BD05. It will take a little low end boost and a HP filter. Anyway, I cannot attach the spreadsheet file because of forum limits, but a screen shot was accepted.
I wonder if the PR's rated Xmax is the same as PR's Xmech, you may have a little more than 6mm to play with.
I would not discount the possibility of building a PR, once you know the app. weight you can get pretty close w/ 1/3 your surround and spider(s) weights, a connecting tube and a flat diaphragm (you don't need a cone type for a PR.), and it is easy to make provisions for additional weight (e.g.: washers).
Regards,
Using Jeff Bagby's spreadsheet I end up w/ a total of 26.6 gms of added mass (13.3gm per PR) using 2ea. Peerless 830880 PR, and 1ea. Wavecor WF152BD05. It will take a little low end boost and a HP filter. Anyway, I cannot attach the spreadsheet file because of forum limits, but a screen shot was accepted.
I wonder if the PR's rated Xmax is the same as PR's Xmech, you may have a little more than 6mm to play with.
I would not discount the possibility of building a PR, once you know the app. weight you can get pretty close w/ 1/3 your surround and spider(s) weights, a connecting tube and a flat diaphragm (you don't need a cone type for a PR.), and it is easy to make provisions for additional weight (e.g.: washers).
Regards,
Attachments
I'm a layman and this discussion is obviously way above my pay grade. However, my HTPC is currently attached to a pair of small speakers that I purchased for $10. I love them they, are adequate in my small apartment. I believe the speakers come from an early incarnation of the Panasonic SB-PM41 system (wooden speakers). The 4" bass drivers perform well but only under hard driving. The internal volume of the cabinets is about 6 litres. At the back of the cabinets are rear-facing ports. If I replace the ports with 2.5" passive radiators will increase low-frequency response at low volumes?
Depends; PRs generally need to be 1.5-2x larger in [total] area than the vent to keep from bottoming out, so considering size, intended app, should be ~2x larger in summed area.
GM
GM
No, passive radiators and ports perform similarly. At low volumes, ports even are slightly better. If you want more bass, use some bass boost plugin on the HTPC.
Last edited:
- Status
- Not open for further replies.