Dipole wall placement

[Gregm]

Originally posted by Rocky
Explain what kind of device this tripod type support is.. Some sort of metal frame

I meant the bog-standard supports used in photography, to support floor-standing spot-lights, mikes, etc. You, know, one upright rod with adjustable height, ending in three feet on the ground...

With that in the back, and two spikes/cones/whatever in the front (baffle) you can easily adjust the speaker at will.

I'd also consider a shelf connected to the baffle, as extra support for the TAD

[sfdoddsy]

I'd suggest two trapzeoid shaped wings on either side, ie X (the height), 20cm (the top), 40-60cm at the bottom, and then do a horizontal cross brace below the horn to support it and give a solid structure.

It would have the dual benefit of supporting the horn and extending the bass, without knowing how you're planning on EQing.

Cheers

Steve

[Magnetar]

Originally posted by Rocky


From 150 cycles??? Maybe if mr.Linkwitz designed my baffles Planning on gettting mine down to some 50-60 cycles... Two meters also sounds like an awful lot of space... unneccesarily much space.. Can't really understand why they would say such a thing..

With the baffle shown in your jpg 150 Hz is optimistic.

[Rocky]

Originally posted by sfdoddsy
...without knowing how you're planning on EQing....

one passive capacitor takes care of equalizing the horn (Radian diaphragm), crossover is to be active 4th order. I will add active eq to the woofer if it proves neccesary. As all my stuff is DIY, adding stages is no problem..

Originally posted by Magnetar

With the baffle shown in your jpg 150 Hz is optimistic.

The baffle shown in the JPG is the driver support only. It'll get wings. I made the baffle slim for asthetics, so wings can be transparent and WAF high. Better than living with a sq.m. MDF panel

[johninCR]

Some attenuation (and slowing) of the rear wave helps make near wall placement more possible.

With transparent wings, I'd go with a single relatively thin pole with something at the top to cradle tweeter, like the non-tripod supports that sports photographers use. That's as long as there aren't kids or dogs that could knock it over. If there are, you are going to need a support that goes quite deep since the baffle will be so top heavy.

Also, you don't want spikes or cones. Don't give up the free ride that the baffle/floor junction gives you.

[Nuuk]

Based on my own experience with my open baffle speakers I would say make the baffles a bit wider.

Mine are 104 cm high by 83 cm wide and go down to around 70 Hz with the Goodmans 201's.

As regards placement, they sound better the further away from the rear wall that you can take them. Mine are about one metre from the rear wall and sound better there than at 60 cm. For most of us not living in a palace, there is a limit to how far out into the room we can bring them so there will have to be some degree of compromise.

I made up some absorbant 'bags' of offcuts of foam to place behind the main drivers which also helps!

[LS]

Hi,

If you can make the dipole to front wall the same as

the distance from the listener to the rear wall

it will give a first reflection cancelation at low freq.

linkwitzlab.com FAQ 31

LS

[Magnetar]

How about hanging it from the ceiling?

Are you going to biamp or choke the TAD way down?

Originally posted by Rocky

Now, will the ~20-30cm spacing provided by the TAD driver give sufficient space behind the dipole so that it'll work properly? Or will I have to find another way of supporting the baffles further into the room?