I'm looking for some help - I have a pair of Fostex FE167E drivers which I plan to use in a small room (6' 3" x 9' 2" with 8' ceiling). The resulting speakers will need to be mounted on the short wall (over a desk so floorstanders are out) and I will be listening from around 2-3 feet. Amp is a Trends TA 10.1.
What I would ideally like to do is build cabinets with a triangular cross section which would then fit flush into the corners. What I don't know is how to adapt the cabinet design to work with the corner placement rather than against it. Should I go for a 15l cabinet as recommended by Fostex or something a little larger? How can I avoid boomy bass or other problems normally associated with corner placement?
Thanks for your help,
Mark
What I would ideally like to do is build cabinets with a triangular cross section which would then fit flush into the corners. What I don't know is how to adapt the cabinet design to work with the corner placement rather than against it. Should I go for a 15l cabinet as recommended by Fostex or something a little larger? How can I avoid boomy bass or other problems normally associated with corner placement?
Thanks for your help,
Mark
http://www.zillaspeak.com/systems.asp
http://www.zillaspeak.com/bib.asp
My room is not much bigger.
Godzilla
http://www.zillaspeak.com/bib.asp
My room is not much bigger.
Godzilla
odell said:
try this site you may get a few ideas there.
http://www.pispeakers.com/
the designer/owner is very helpful.
Boomy bass is better than no bass
In all honesty I've had some full rangers sound better in the corner. The bass was slighly boomy but still better defined then what comes out of a lot of the subs these days. The FE167E normally has no bass anyways without a BSC circuit. So the recommended enclosure adapted for the corner might do fine with no correction circuit.
Corner horns are sweet. There is one using the FE167E on the Decware website, but it's big and heavy.
Jeb-D. said:
Maybe in your experience. Unless in a big room we found Demetri to have too much bass, Also keep in mind that pushed up against a wall a box has next to no baffle step. In a corner, and in a room this small, you want to design for very low Q bass if you don't want it to be boosted. I'd start out with a sealed box with Q somewhere between 0.5 & 0.577.
dave
What is Demetri? I've only run the FE167E driver in the recommended bass reflex, which may be the reason for lacking bass. Excellent sounding with a BSC circuit, but very harsh and shouty without one. It also does pretty good without BSC compensation, when driven by an amp with a Zout of 8ohms and a Zobel.
Jeb-D. said:
Quite a bit bigger than the 167 BR
http://www.planet10-hifi.com/boxes-fostex.html
We built a variation on the factory 15l (with lower tuning) for our initial 167e tweaking experiments.. It was good sounding and served th epurpose -- low bass is not its strong point -- and the current owner really enjoys them.
dave
Yeah, the Fostex BR isn't bad -one of their better reflex-boxes IMO, but it doesn't extract the most out of the drivers; certainly not WRT extension.
My own 167 MLTLs are actually running sans a BSC circuit too. That said, they are pushed up against a rear wall, which helps, despite my designing them with as narrow a baffle as possible.
My own 167 MLTLs are actually running sans a BSC circuit too. That said, they are pushed up against a rear wall, which helps, despite my designing them with as narrow a baffle as possible.
Thank you to everyone for the replies - I'm new to this and you've been very helpful.
I don't expect miracles from this compromised room, but would like to make the best out of the situation. As far as bass goes my only reference is listening to typical small standmount speakers which list frequency reponse low numbers of around 65/70Hz. I wouldn't want less bass than this type of speaker.
I've plotted a couple of boxes in WinISD - a 15l sealed box gives a Q of 0.57, as advised by planet10. Am I right in saying that I could start sealed and simply add a port later if necessary?
Also, should I build the triangular cross section cabinet with a narrow baffle (equilateral triangle) or a wider baffle (right triangle) - what affect does baffle width have?
Thanks again,
Mark
I don't expect miracles from this compromised room, but would like to make the best out of the situation. As far as bass goes my only reference is listening to typical small standmount speakers which list frequency reponse low numbers of around 65/70Hz. I wouldn't want less bass than this type of speaker.
I've plotted a couple of boxes in WinISD - a 15l sealed box gives a Q of 0.57, as advised by planet10. Am I right in saying that I could start sealed and simply add a port later if necessary?
Also, should I build the triangular cross section cabinet with a narrow baffle (equilateral triangle) or a wider baffle (right triangle) - what affect does baffle width have?
Thanks again,
Mark
The FE167E rolls off fairly high in a 15L sealed box - you probably won't get much bass at all. If you want bass and small, then you will need to go with BR, with a front port.odell said:
I have my FE167E in the recommended BR, and measurements suggest that they are at -3dB around 60Hz, which isn't too bad at all. Mine are pushed back against a wall in a room very similar to your's in size, and don't sound "boomy" to my ear.
The baffle width shouldn't have an effect if they are corner mounted - the wall will act as a baffle, extending the width. If you go with a right triangle, you will need good bracing to keep your front panel stiff. Other than that, you could probably just build whichever you think will look better.
I will try the sealed 15l box and see how it sounds after a few weeks listening.
If I don't like it I can soon convert it into a 15l ported box as Fostex recommends (albeit a different shape).
Could someone guide me toward a good primer on stuffing / lining sealed and ported enclosures?
Thanks again,
Mark
If I don't like it I can soon convert it into a 15l ported box as Fostex recommends (albeit a different shape).
Could someone guide me toward a good primer on stuffing / lining sealed and ported enclosures?
Thanks again,
Mark
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.