The Boom Bench, aka THT LP

Post your build odyssey here.
Message
Author
jraut
Posts: 7
Joined: Fri Sep 21, 2012 2:55 pm
Location: Escondido, Ca

The Boom Bench, aka THT LP

#1 Post by jraut »

I just completed my first BFM build during the Christmas holiday. My dad was in town with us, so we got to enjoy a father-son project for a few days. WAF had to be very high for this, so I planned a built in installation under the fireplace hearth and sheet-rocking over it.

It is a 21” wide version, using 2 sheets of Arauco and some leftover ¾” ACX I had on hand. I made panel #1 ¾” thick, so the overall height is 18 ¼”. The driver cover is also ¾” so the total length is 72 ¼”. By making those two pieces with my leftover ¾”, I was able to get everything else cut on 2 sheets of ½” Arauco. Cutlist was great for laying out all the panels. I ordered the Dayton DVC while it was on sale in early Dec (yeah!) and the Dayton 250watt plate amp.

We started the day after Christmas and cut all of the panels in about 4 hours.
Image
I don’t think I’ve ever made that much sawdust in one day. My cheapo table saw did fine, though it took a bit more time measuring and setting up the junky fence than if I had a nicer saw. That night I broke the sub in overnight with a 25hz signal at about 9V.

The 2nd day we installed panels 1 through 8.
Image
My brad nailer came in super handy to hold everything in place. Used about 1 ¾ tubes for PL for the entire build. By the way, PL doesn’t come off your hands for about 3 days.
Image

Image

Day 3 we finished installing everything except the driver cover and did the stethoscope/hose test.
Image
Found a few areas that needed some silicone around the driver seal. Installed the driver cover and brought it inside for its first trial run.

The original plan was to install it under the fireplace hearth. It was already sheet-rocked and would fit fairly nicely underneath. After positioning the sub right in front of that location however, I found that my couch fell into one of the worst nulls in the whole room. I tried it standing up in the front left and right corners, and one corner was okay, the other, not so much. My wife suggested moving a rarely used table in the rear corner of the room and trying it there. Victory!! 25hz give a nice back massage on the couch! So we decided to make it into a bench, and bought some 4” foam for a cushion. We covered the cushion with some leftover fabric we had that matches the pillows on our couch (more WAF points!). Textured and painted both sides, and installed matching baseboard molding on the bottom. My five year old gave it the moniker: The Boom Bench.
Image
I have two boys, so a grill is required to prevent the THT mouth from being used for a Transformer fort. The grill cloth was a light beige shirt that I didn’t wear often that matched the paint color beautifully (even more WAF points!). Corner molding covers the staples on the sides and top.
Image

Listening:
Wow. Just one word, that’s all that’s needed. The THT quickly pointed out which windows need some additional caulking to minimize the rattles! I’m very afraid to crank this thing after feeling the glass flexing. I haven’t even checked to see what voltages I’m listening at, but I bet they’re only about 10% of its capability. Music sounds fantastic and can quickly give my wife a headache if I’ve got it too loud (boo). Movies are my primary use, and it totally improves the experience. Explosions shake the house (and windows) and really immerse you into the movie. I’m loving it :hyper:

User avatar
Harley
Posts: 5758
Joined: Mon May 08, 2006 2:45 pm
Location: Christchurch, New Zealand - Authorised BFM Cab Builder

Re: The Boom Bench, aka THT LP

#2 Post by Harley »

jraut wrote: Image
Image
ImageSemi-retired: Former Australia and New Zealand Authorised BFM cab builder.

Alien
Posts: 70
Joined: Tue Oct 30, 2007 7:29 pm
Location: Milton Keynes, England

Re: The Boom Bench, aka THT LP

#3 Post by Alien »

jraut wrote:Image
What do I see in the background? Inquiring minds need to know!!

A

88h88
Posts: 1603
Joined: Mon Jul 04, 2011 10:20 am
Location: Coventry, UK

Re: The Boom Bench, aka THT LP

#4 Post by 88h88 »

Yeah the speaker's fantastic but the car looks even nicer...
4xOT12s, 2xT39s@22", TTLS@18", 2xT60@18"

User avatar
shawn_g
Posts: 386
Joined: Sat Jan 14, 2012 9:00 pm
Location: Logan, OH

Re: The Boom Bench, aka THT LP

#5 Post by shawn_g »

Really nice work. :clap:

Lets see some more pictures of the Shelby Cobra (replica I assume?).

User avatar
Bas Gooiker
Posts: 752
Joined: Fri Jul 06, 2012 5:05 pm

Re: The Boom Bench, aka THT LP

#6 Post by Bas Gooiker »

Very nice... :clap:
Life is just a game, don't take it to seriously!

koturban
Posts: 172
Joined: Sun Feb 27, 2011 11:17 am
Location: Kincardine. ON

Re: The Boom Bench, aka THT LP

#7 Post by koturban »

Great job! I love stealth installs.

jraut
Posts: 7
Joined: Fri Sep 21, 2012 2:55 pm
Location: Escondido, Ca

Re: The Boom Bench, aka THT LP

#8 Post by jraut »

Car is a FFR Roadster (Cobra replica). Took about a year and half to build, and I enjoyed the build about as much as I do driving it. Tons of pix here.
Image

User avatar
Michael Ewald Hansen
Posts: 638
Joined: Tue Aug 16, 2011 10:43 am
Location: Denmark

Re: The Boom Bench, aka THT LP

#9 Post by Michael Ewald Hansen »

jraut wrote:Car is a FFR Roadster (Cobra replica). Took about a year and half to build, and I enjoyed the build about as much as I do driving it. Tons of pix here.
Image
*droooooool* :mrgreen: :mrgreen:

Lovely sub build aswell :wink:
Authorized Builder - Denmark
Check out the BFM Facebook page

User avatar
Bill Fitzmaurice
Site Admin
Posts: 28916
Joined: Tue May 02, 2006 5:59 pm

Re: The Boom Bench, aka THT LP

#10 Post by Bill Fitzmaurice »

Image[/quote]

If you look closely you can see Capt. Kirk and a Gorn at the top of the rocks.

bassmonster
Posts: 1384
Joined: Wed Jul 13, 2011 9:23 am

Re: The Boom Bench, aka THT LP

#11 Post by bassmonster »

:o :o :o :o :o :o

That Shelby replica is beautiful!!! I've been doing some research lately on those car model kits and have always wanted to build one. That is a work of art! How hard was the build, would you say, if you could rate the difficulty? What other car stuff have you done?

Oh and nice clean build too! :clap: :clap: :clap:

jraut
Posts: 7
Joined: Fri Sep 21, 2012 2:55 pm
Location: Escondido, Ca

Re: The Boom Bench, aka THT LP

#12 Post by jraut »

If you can follow Bill's plans to build a sub, you can build an FFR. There are a handful of people that have built them with almost no automotive experience. I restored a 65 Mustang before building this, and I'd rate the Mustang restoration as more difficult. Hardest part is picking the color to paint it! I spent about 500 hours building I'd guess, maybe 7 hours a week over a year and a half. I'm really only familiar with FFR's so I can't really provide any input on other kits. I have about 40K miles on the car and drive it to work whenever its sunny (hint: I live in San Diego).

User avatar
doncolga
Posts: 1967
Joined: Thu Jul 01, 2010 3:01 pm
Location: Statesboro, GA
Contact:

Re: The Boom Bench, aka THT LP

#13 Post by doncolga »

How clever with the sub. Very nice.
Donny Collins
Built:
Two 18" Tuba 30's 3012 LF
Two 26" Tuba 30's Lab 12
Two OmniTop 12's DL 2512 (Melded Array)
Presonus Studio One DAW
Harrison Consoles MixBus 32C DAW

User avatar
Tom Smit
Posts: 7569
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: The Boom Bench, aka THT LP

#14 Post by Tom Smit »

:clap:
TomS

ketoet
Posts: 383
Joined: Thu Jul 08, 2010 3:19 pm
Location: kortrijk , Belgium

Re: The Boom Bench, aka THT LP

#15 Post by ketoet »

Both builds look veeerrryyy nice.
Looks like we share the same hobby's
building BFM speakers isn't a hobby , it's an addiction

1 x THT
1 x autotuba
2 x dr250 melded

2 x wedgehorn 10
2 x tlah

Post Reply