I want to experiment by removing the top port and putting four ports on the front of the HWK15. The top ports would be the same as the bottoms (4 x .75). How will this affect tuning and output(SPL)? Has anyone every consider designing some type of folded horn top to focus the energy into the room but still using the 6 x 8 port to fire into the horn? This horn could be attach or removed. That way energy could be focus into the room or focus up. THANKS for any HELP.

the top and bottom ports if the same size will decrease ouput since they will be 180 degrees out of phase at the resonant frequency if the drivers are wired in phase.

phasing problems are cured if one is out of phase.
my guess is that nothing bad is going to happen if you "play" with wiring to get the sound you like

THANKS for the info. Is there any way to build a piece to attach to the top and focus the energy into the room instead of up. I am sure it would have to be angled, enclosed on both  sides but it's output volume would have to match the output of the 6 X 8 top port. I would not want to cut down the top port energy just push it forward. Would anybody have an idea to the volume or size of the scoop you need to use on top? Yes another dumb question.

[quote author=HT-EXT  link=1136261813/0#6 date=1136778031]THANKS for the info. Is there any way to build a piece to attach to the top and focus the energy into the room instead of up. I am sure it would have to be angled, enclosed on both  sides but it's output volume would have to match the output of the 6 X 8 top port. I would not want to cut down the top port energy just push it forward. Would anybody have an idea to the volume or size of the scoop you need to use on top? Yes another dumb question. [/quote]

Not a dumb question ..... you're just forgetting a detail and then over-thinking the issue.

The detail: those waveforms coming from your top port on a Housewrecker are longer than your room, most likely. Remember that the lower the frequency (longer the wavelength) the more the dispersion pattern resembles a perfect circle. Your room is already containing and directing much of the initial pressure wave from the cabinet. The only thing that will happen when you add something to the port is that the port volume will increase and the tuning frequency will be lower, creating an even more circular dispersion pattern.

If you turn the port into a horn there will be some focused energy near the port exit, but it will also be harmonically related to the horns cutoff frequency. In other words it would have to be LARGE to make the difference you're looking for.

One thing you might consider if you feel the impact is not adequate is that the room could be causing standing waves in your listening area to almost cancel completely your desired response. One way to test this is to simply move around the room, or better yet move your HWK around a little and listen in different areas. You will definitely notice a difference, but you might be able to improve performance in your listening area by moving the cabinet.

PS:
Many times bass traps can help by catching and reducing some of the reflected energy from the surrounding walls and reducing cancellations. Placing them can be as much fun as placing your speaker cabinet.

KILLER PIC!!! Thanks J-Rock that pic gives me all kinds of ideas. I did build a scoop that fits directly over the top port. I was able to get a +3db gain. This gain was focus at the listening area where it needed it the most. This also allowed me to unhook one of the HWK15 and now just the WO36 and one HWK15 is more than enough for the concrete bunker. THANKS for the help and keep the pics coming.

Do you know what size base for the cone you would start with and what length from the base to the point could be? Of course the combos can be endless depending on what type of tuning would be good for the room. Do you think the larger the cone area the lower the sound(Hz) will be or just better room loading. Let me know some of your ideas on HWK15 and cone combo. Thanks J-Rock.