Caper's TRIO12 + 2 PRs Sub Build

[GO-NAD!]

Originally Posted by caper26

Yeah, 24" box is bigger than you would think! Wife isn't too impressed, but nothing we can do now I was listening to music most of the day yesterday. All I could do was grin!! Listened to everything from 90's dance music (Humpty Dance, Whoomp, Please Don't Go), some Pop (Red Red Wine, Billy Jean; both sounded amazing), some hip hop (Method Man, Snoop: Still Dre), and some rock & metal. There is also a track I got somewhere called "Bass Tester" or something which is a high amplitude bass 'song' with some REALLY low notes, and it hit them all...I was like "WOW".


It is a workshop in an aircraft hangar!! Cost me $75 for the year to be a member but worth every penny!! I painted it in my den which was a little more space limited, lol.

Did you solve your issues already? The shop is in an aircraft hanger? You're not at Greenwood, by any chance?

[caper26]

Originally Posted by GO-NAD!

Did you solve your issues already? The shop is in an aircraft hanger? You're not at Greenwood, by any chance?

Too funny. I didn't even notice you were in NS until just now. Yeah dude. I joined the wood hobby club just to build this thing!! It's in the hangar straight through the T-intersection past the rink. If you plan on building one (or more!) you are more than welcome to come and check it out sometime.
Well I did solve most of the issues. The driver needed extra glue on the basket. Real easy fix...I was quite amazed at the huge difference a little superglue could make on such a massive magnet & basket.
Ground loop. I know what the problem is, and the fix is temporary for now. The is a ground loop from Eastlink cable on the power circuit. Right now I am using a 3-2 prong extension cord to disconnect the ground prong of my sub for now, until I try and get a better earth ground on the circuit or the coax cable outside.

[caper26]

Here is an estimate of my totals. I will round to the nearest $5 for ease.

• Parts: Trio12 driver, 2 PRs, plate amp, floor spikes, and all mounting hardware: $600 including shipping and taxes.
• Sheet of MDF: $40
• Glue sticks: $5
• Gorilla Glue: $5
• Primer: $10 (See Note 1)
• Duratex Cabinet finish: $80 with tax & shipping
• Say $10 for shop supplies (Carpenter's Glue, wood screws, sandpaper, nylon nuts, etc)
• Weatherstrip: $10

That's a total of : $760
.

I also joined the wood hobby club specifically for this, so my personal total would include:
Membership to wood hobby club: $75
.

My grand total: $835
.
Note 1 = Primer is not required. I wasn't sure how much duratex would be needed, but there is about 3/4 gal left over and it is self priming, so I could have used that instead.

[caper26]

Final weight-in at 122 lbs without grills

[ma7rix13]

Nice job. I think you put the threaded inserts in wrong though. They should go the opposite way so they squeeze the sub to the baffle.

[caper26]

Originally Posted by ma7rix13

Nice job. I think you put the threaded inserts in wrong though. They should go the opposite way so they squeeze the sub to the baffle.

No. They aren't T nuts or hurricane. They "self tap", so if you put them in from the back, when you screw the machine screws in from the front (clockwise), the direction on the backside will be CCW, and they will want to back out. That's why I used gorilla glue on the inserts, and bought nylon nuts to go on the back. Next time I would go with T nuts from the back side... less work Thanks for the compliments.

[caper26]

Here are some SPL readings I took at 1 meter with sub located as per photo above.

• I used a Realistic (Radio Shack) digital SPL meter model 33-2055.
• I had re-run YPAO prior to readings, and had gain on sub's amp at 11 o'clock.
• The sub's "EQ Level" knob was set to the ZERO mark and other EQ knobs set to min settings.(therefore removing any EQing by the amp)
• Receiver volume was brought close to or at "0".
• I used correction values for the meter found at HTS. No decimals used. (0.5 or higher was rounded up. 0.4 and below was dropped.

Read in 3 columns: Frequency -- Raw SPL reading -- corrected SPL value

Freq --- SPL --- Corrected
16 Hz -- 91 dB -- 104 dB
18 Hz -- 103 dB -- 114 dB
20 Hz -- 109 dB -- 118 dB
22 Hz -- 111 dB -- 119 dB
25 Hz -- 111 dB -- 118 dB
28 Hz -- 112 dB -- 117 dB
31.5Hz-- 110 dB -- 114 dB
35 Hz -- 105 dB -- 109 dB
40 Hz -- 102 dB -- 105 dB
45 Hz -- 105 dB -- 107 dB

[adwilk]

That looks pretty good.. I'd love to know how it compares to other diy options in that price range... 24" cube isn't too big and the numbers look solid. Nicely done..

[lsiberian]

Well done. It's gotta be nice having access to a shop like that. One of these days. I'll have a good shop.

[BoredSysAdmin]

and had gain on sub's amp at 11

Take it to 11 !!!