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View Full Version : OB or not OB? That is my question.



DarrenHW
04-08-2015, 07:57
I’m in search of a new quintet or possibly septet of speakers. Due to a recent room rotation I am unable to use the Ditton 44’s I was using, this got me looking around for alternatives and OB’s is where I’d like to go.
John’s advised the combination of Alpair 12P and Goldwood 1858 and I like this idea, however I plan on using them in what seems like a far from conventional application. I want to run 5/7 channel AV but it is space limitations that prohibit the use of the 44’s. As it is surround speakers that are causing placement issues I thought it best to start with the build (such as it is) of the surround speakers and if these prove successful move onto the front / stereo pair.
This is the space I have to play with:

http://i1324.photobucket.com/albums/u606/drtwas/IMG_5512_zpsb8lb3crk.jpg (http://s1324.photobucket.com/user/drtwas/media/IMG_5512_zpsb8lb3crk.jpg.html)

http://i1324.photobucket.com/albums/u606/drtwas/IMG_5511_zpsgisla0q5.jpg (http://s1324.photobucket.com/user/drtwas/media/IMG_5511_zpsgisla0q5.jpg.html)

You’ll see the KEF Kit 3’s balanced on the Ikea units, they work better there than the 44’s but I’m sure if you’re reading this you’ll know what a crappy solution this is. I’d like to do away with the Kef’s and mount OB’s above the internal door opening. The wall above the door is 385mm high by 900mm wide and despite all other walls being solid masonry this is a stud partition.
So what’s the consensus is this a suitable area for a small single full range OB? I was hoping to use 12P’s to keep the full range speakers the same all the way round but would I be better using a smaller speaker such as the 10P?
Regarding the bass helpers, would it be possible to use just one using a Goldwood 1858 and an iNuke? The reason for this is I only really have space for one which would be behind the coffee table between the two recliners which is already less than ideal. If it’s not possible to run both channels into one bass helper any suggestions on placement for two helpers?
I appreciate most AV processors cross surrounds to the sub at 80Hz but I would rather be crossing at 40Hz, this is how I’ve run with the 44’s as rears and far prefer the sound crossing over to the sub lower.

Marco
05-08-2015, 08:23
I'm surprised at the lack of response to this. Surely some folks with OB design experience could help Darren here? Come on, folks! :)

Marco.

DarrenHW
05-08-2015, 08:55
Just to clarify what I'm looking to do here's a terrible image:

http://i1324.photobucket.com/albums/u606/drtwas/IMG_5541OB_zpsrdtwcz7r.jpg (http://s1324.photobucket.com/user/drtwas/media/IMG_5541OB_zpsrdtwcz7r.jpg.html)

The circles in the air are the proposed locations for small full range OB's aimed towards the listening position. The square with the circle in it is the proposed location of the bass helper, this can be up to 1000mm from the rear wall.

The advice I had so far is that this a less than ideal OB setup, any thoughts?

struth
05-08-2015, 10:25
not ob fr but canon used ti do rather good wide dispersion speakers that were very good for rears in a 5 channel system

struth
05-08-2015, 10:27
there are some here
www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR2.TRC1.A0.H0.Xcanon+ speakers.TRS0&_nkw=canon+speakers&_sacat=0

DarrenHW
05-08-2015, 10:56
I remember those, tbh I'm looking for something that can go a little deeper but thanks for the suggestion.