I am in the planning phases of adding some low end to my existing HT. I have tried to work with WinISD but have never been successful. I am very interested in building a single dual opposed build using one of these drivers. I know they are different but am curious how this translates into a model with different power. If anyone would be willing to help me, I would be grateful.
A little background:
My current equipment;
Yamaha RX-V2400, PS3 for BR playback, Direct TV HD/DVR
(L&R) Cerwin Vega VS120 (C) Boston CR85 (Rear L&R) JBL8330 guts in cabs I built, (Sub) 1-Dayton Audio Titanic 15" kit with the provided 1K plate amp.
My Cerwin's I bought new in 94' when I graduated HS. I have 5 Boston CR85's I bought in 02' and all but the one I use for my center are in my closet. Since adding the 8330's I realized how inefficient they were. I also think they lack some level of dynamics, thus I went to the CV VS120's to help with my front stage. It is better, but I am killing the center trying to keep up. My long term plan is to replace the L,C,R's with either 4pi or a SEOS variant. I am waiting specifically for the SEOS 12 or 15 to be mated with the JBL 2226H before making that decision. So I decided to work on what I can until then.
Which brings me to my above call for help and potential ideas for my build. The SSD's have been used as a go to budget HT driver for a while and are readily available. I could potentially power 4 drivers in this case instead of only 2 of the SP4's. My ultimate goal here is to end up with a pair of dual opposed 18"s. The initial build will be for a single dual opposed cab as that is all I can justify at the moment.
I didn't want to make any decisions about amps as I was still unsure about which drivers and what potential each driver had given its potential to handle power and how they perform with that power. I will entertain any suggestions with regards to power. I do not have any current plans to run a dedicated line to the living room for this sole purpose, but I am not opposed to it as a future upgrade. My initial choice was the tried and true EP4K for cost/watt value and seemingly great reliability. I planned one per pair of drivers. I do want a built in crossover of some kind as I won't be able to get a DSP yet. That is in the final plan as well.
I am keeping a close eye on NUBE's dual opposed SSD 15" build thread as this is my inspiration. I am not opposed to doing 15"s instead of 18"s, but I am trying to get the most cone area I can within the cabs footprint. If 15"s make more sense, then I can go that route as well.
Here are the published specs for each driver"
SP4 18" http://store.ficaraudio.com/sp418/
DUAL 1 | DUAL 2
Fs: 24.7 Hz | 24.9 Hz
Re: 0.65 Ohms/coil | 1.27 Ohms/coil
Qms: 7.45 | 7.38
Qes: .60 | .59
Qts: .55 | .55
Mms: 555g | 544g
Cms: 0.74mm/N | 0.74mm/N
Sd: 1210cm^2 | 1210cm^2
Vas: 153.7 l | 153.7 l
Spl: 87.8dB 1W/1m | 87.9dB 1W/1m
Bl: 13.7 N/A | 19.1 N/A
Xmax: 33mm | 33mm
Rms: 2500W | 2500W
Sealed box: 4-6 cuft | 4-6 cuft
Ported box: 6-8cuft | 6-8cuft
Sub OD: 18.500” | 18.500”
Cut ID: 16.750” | 16.750”
Mounting depth:11.750” | 11.750”
Displacement: 0.26cuft | 0.26cuft
SSD 18" http://store.ficaraudio.com/ssd18/
DUAL 1 | DUAL 2
Fs: 27.6 Hz | 27.6 Hz
Re: 0.7 Ohms/coil | 1.4 Ohms/coil
Qms: 9.56 | 9.56
Qes: .47 | .47
Qts: .45 | .45
Mms:338g | 338g
Cms: 0.098mm/N | 0.098mm/N
Sd: 1210cm^2 | 1210cm^2
Vas: 201.4 l | 201.4 l
Spl: 91.4dB 1W/1m | 91.4dB 1W/1m
Bl: 13.1 N/A | 18.7 N/A
Sealed box: 3.5-5 cuft
Ported box: 6-10 cuft @ 33Hz
Sub OD: 18.500”
Cut ID: 16.750”
Mounting depth: 9.500”
Here is an older picture of my room (pre toddler) It looks the same now except the floor is covered with toys:
I have divided the room into three areas. The main square is the room less the spaces on either side of the fire place. This is 12' 6"x 16' (200sqft). The spaces to either side of the fire place are 4' 3"x 3' 6" (29.2sqft/2). So just shy of 230sqft of total floor space. The build ins will almost fill the floor space on the sides of the fireplace. 23.5" deep and the full 4' 3" wide. The room is open to the dining room in the rear (107.7sqft) and the foyer (61.5sqft). the foyer is open to the hall that runs the length of the house and both connect to the kitchen. I would call it an open floor plan. So I know I have my work cut out for me as there is a lot of area to steal my SPL.
The ceiling is vaulted in the center and the low side, where the tv and opposite side where the couch sits are 8' 6" and the center is 11" 1" at the center peak.
If there is any other information that would be helpful please let me know. Thank you for taking a look and I look forward to everyone's input.