Sunosub II to be fired up tonight. (1 Viewer)

[Patrick Sun]

I finally get to move Sunosub II into the living room tonight. I've been waiting for the paint to dry (I've come to the conclusion that I suck at spray painting, and just covered up my errors with a silver colored spray paint that gives a hammered metal look for the top endcap).
Sunosub II specs:
10 ft^3 internal volume
24" wide sonotube (around 41" long internally)
One 6" port 22" long (tuned to 16.5Hz)
1 Tempest driver wired as a 4 ohm load
I've got the construction pix, but need to organize them (hopefully I can post some shots from my new website - finally gave in and signed for a more permanant "patcave.com" website with 500MB of webspace - needed all that space for all my DIY construction pix).
Stay tuned!
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PatCave ; HT Pix ; Gear ; Sunosub I + III ; DVDs ; Link Removed

 

[Lewis Besze]

What amp do you use?
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"You Hungarians always disagree"

 

[Patrick Sun]

Lewis, I have a Peavey CS800X - a 2-channel amp 400W/ch into 4 ohms or 600W/ch into 2 ohms, and it's bridgeable.
I feel like another big doofus head because I was having problems getting any output from the driver. I checked the amp, the receiver, the wiring, everything I could think of. Finally I resigned myself to having to remove the driver and making sure I could get it to make some vibrations going from a known good amp source directly, bypassing the terminal cup connection. Well, I discovered that I had wired one of the driver's terminal out of phase with the other terminal on the terminal cup, so of course I would get no vibrations from the driver. The two parallel connections effectively cancelled each other out at the magnet side. Doh! Once I corrected my mistake, Sunosub II came to life.
Here's some preliminary numbers (adjusted) for Sunosub II
Near field
Hz SPL
10 94
12 91.5
15 92
17 96
20 99.5
22 101.5
25 102
28 104
32 105.5
36 106.5
40 107.5
45 108
50 107.5
56 107.5
63 107.5
71 107.5
80 107.5
89 106
100 107
112 103
The 1 meter response looks pretty terrible right now:
Hz SPL
10 81
12 89.5
15 91
17 87
20 87.5
22 87.5
25 87
28 88
32 85.5
36 89.5
40 92.5
45 94
50 96.5
56 100.5
63 98.5
71 94.5
80 93.5
89 92
100 91
112 95
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PatCave ; HT Pix ; Gear ; Sunosub I + III ; DVDs ; Link Removed

 

[Lewis Besze]

The 1 meter response looks pretty terrible right now

Is't not too shaby though!
Aside the peak at 56hz,it's fairly "smooth".
Do you take measurments at the seat as well?
How about max SPL?
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"You Hungarians always disagree"

 

[Patrick Sun]

Lewis, yep, big ol' room hump in the 50's. I am not really into max SPL.
Here's an interim photo of Sunosub II. I think I'm going to ditch the silver silk covering and go with black ribbing for a better form-fitting look to it.

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PatCave ; HT Pix ; Gear ; Sunosub I + III ; DVDs ; Link Removed