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Sunosub II to be fired up tonight.


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4 replies to this topic

#1 of 5 Patrick Sun

Patrick Sun

    Studio Mogul

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  • Join Date: Jun 30 1999

Posted March 28 2001 - 08:20 AM

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). Posted Image

Stay tuned!


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PatCave ; HT Pix ; Gear ; Sunosub I + III ; DVDs ; LDs
"Jee-sus, it's like Iwo Jima out there" - Roger Sterling on "Mad Men"
Patcave | 2006 Films | 2007 Films | Flickr | Comic-Con 2012 | Dragon*Con 2012

#2 of 5 Lewis Besze

Lewis Besze

    Producer

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Posted March 28 2001 - 11:46 AM

What amp do you use?

------------------
"You Hungarians always disagree"


#3 of 5 Patrick Sun

Patrick Sun

    Studio Mogul

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Posted March 28 2001 - 05:23 PM

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. Posted Image

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 ; LDs
"Jee-sus, it's like Iwo Jima out there" - Roger Sterling on "Mad Men"
Patcave | 2006 Films | 2007 Films | Flickr | Comic-Con 2012 | Dragon*Con 2012

#4 of 5 Lewis Besze

Lewis Besze

    Producer

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  • Join Date: Jul 28 1999

Posted March 29 2001 - 01:04 PM

Quote:
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?

------------------
"You Hungarians always disagree"


#5 of 5 Patrick Sun

Patrick Sun

    Studio Mogul

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Posted March 29 2001 - 02:42 PM

Lewis, yep, big ol' room hump in the 50's. I am not really into max SPL. Posted Image

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.

Posted Image

------------------
PatCave ; HT Pix ; Gear ; Sunosub I + III ; DVDs ; LDs
"Jee-sus, it's like Iwo Jima out there" - Roger Sterling on "Mad Men"
Patcave | 2006 Films | 2007 Films | Flickr | Comic-Con 2012 | Dragon*Con 2012