Newbie to DIY, considering sub build - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 15 Old 07-12-2019, 04:43 PM - Thread Starter
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Newbie to DIY, considering sub build

Coming from SVS PB 2000. Current budget is about $1200. Buddy is custom cabinet maker so box will be easy.


Room is in basement, fake wood over cement. About 2200 cu feet. 8 foot solid ceilings No kids. Wife is not a factor because she is cooler than the other side the pillow.

Rest of system is ELAC, Marantz 6012, Outlaw 5000



Will probably be placed in back corner behind two main listening spots. 75% Movies 25% Music. All kinds of music from reggae to metal.


Thanks in advance

Basement HT 5.1.2 - Marantz 6012, Outlaw 5000 - ELAC Debut F5 Towers, C5 Center, B5 Bookshelves - JTR Captivator 1200XS - BenQ2050a 92" Silver Ticket
Upstairs Living Room, Music 2.1 - Anthem MRX520 - Pair of Chane A1.5's, - SVS PB 1000 - Projekt Debut turntable - LG 55" B8 OLED
Bedroom 2.1 - Denon AVR740h - ELAC B4 Bookshelves - Klipsch R-10SW - TCL 49"

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post #2 of 15 Old 07-12-2019, 04:58 PM
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.02

get REW and the calibrated mike and see what you can do with the sub you have,

move ti around see what it can d in that space- gives you a base line to ask "WHAT IF?"

IF it's good, you might only need to build 1 big-ass honker

it depends

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
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post #3 of 15 Old 07-12-2019, 05:01 PM
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Open to duals+ as long as it stays close to budget?

Marty's are very common. You could do 2 of those loaded with um18s driven by a nx6000d and be close to your budget. I'd estimate $200 in wood, $100 misc (cable, screws, PL3, mattress topper, connectors), $550 for amp and $600 for 2 UM18s. Thats assuming you have to tools you need.

If you went VBSS you could build 4 of them and buy an amp for under $1200.

If you really want to step your game up, go with a submaximus V3. They are HUGE though. Ibe got a pic of my submaximus next to my old full marty... I also tossed in a pic of my dual VBSS.

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Equipment: Yamaha 3050, Oppo 103d, DIYSG HT12s (L,C,R), PSA mt 110s (SR,SL), 2 VBSS, Submaximus, 4 driver BOSS build, umik-1, Epson 3700

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post #4 of 15 Old 07-12-2019, 05:10 PM
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The ~21Hz tuned VBSS should do nicely to start. 2 of those on one channel of a NX3000D gives you room later if you decide you want to go digging for the lower stuff (concrete eats bass though, that might be chasing a ghost in your case).

PA460s are $90/per right now, the NX3000D about $350. Neutrik connectors, wire, etc. about $35, plus whatever the box costs. Much bang for the buck.

For tactile response look into the BOSS platform. A low-cost and easy to implement DIY solution.

Sub builds: Yet another Infinity 1260 build | Twins! | Modified V.B.S.S. build | UM12-22 builds | AV stand and sealed UM18s

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post #5 of 15 Old 07-12-2019, 07:16 PM - Thread Starter
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Quote:
Originally Posted by asarose247 View Post
.02

get REW and the calibrated mike and see what you can do with the sub you have,

move ti around see what it can d in that space- gives you a base line to ask "WHAT IF?"

IF it's good, you might only need to build 1 big-ass honker

it depends
Sub I had is gone, sold it when i bought the Monolith, which was DOA, and then our basement flooded.

Basement HT 5.1.2 - Marantz 6012, Outlaw 5000 - ELAC Debut F5 Towers, C5 Center, B5 Bookshelves - JTR Captivator 1200XS - BenQ2050a 92" Silver Ticket
Upstairs Living Room, Music 2.1 - Anthem MRX520 - Pair of Chane A1.5's, - SVS PB 1000 - Projekt Debut turntable - LG 55" B8 OLED
Bedroom 2.1 - Denon AVR740h - ELAC B4 Bookshelves - Klipsch R-10SW - TCL 49"
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post #6 of 15 Old 07-12-2019, 07:18 PM - Thread Starter
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I thought about an Ultimax 18 in ported 8 cube box with 4" Aeroports, but calculations say they need to be close to 28 inches long and most are not built that long.

Basement HT 5.1.2 - Marantz 6012, Outlaw 5000 - ELAC Debut F5 Towers, C5 Center, B5 Bookshelves - JTR Captivator 1200XS - BenQ2050a 92" Silver Ticket
Upstairs Living Room, Music 2.1 - Anthem MRX520 - Pair of Chane A1.5's, - SVS PB 1000 - Projekt Debut turntable - LG 55" B8 OLED
Bedroom 2.1 - Denon AVR740h - ELAC B4 Bookshelves - Klipsch R-10SW - TCL 49"
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post #7 of 15 Old 07-12-2019, 08:31 PM
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So use 3" or, (3) 4". You could see the port air velocity in bass box pro. Going with the above route they will be shorter. Or do a shelf port.

The only gain of flared port is to decrease the air turbulence as it exits the enclosure. Too much and you'll hear ther famous chuffing.
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post #8 of 15 Old 07-13-2019, 03:33 AM
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You could build a SKhorn or SKram with the LaVoce driver.


Or just build as many Marty's you can afford with a 6000DSP and call it a day.
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post #9 of 15 Old 07-13-2019, 02:30 PM - Thread Starter
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The VBSS looks like a good start. I think I may build 2 to start. I would rather use Baltic Birch than MDF though. So it's OK to buy the NX3000and just run one Channel? I thought about the 1000, and just giving them 500watts a piece, but that may not be enough.
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post #10 of 15 Old 07-13-2019, 03:55 PM
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you'll be glad you went for the nx3000D

not that maybe the nx1K wouldn't be enough- maybe

but once you fire up 2 VBSS's and do some quality REQ and Sub EQ,
you'll catch your self in the mirror- with that sneaky little smile -
and thinking- I may nor be done- yet.

short version : ask me how I know?

BB or a good plywood, way much smarter than MDF,
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DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
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post #11 of 15 Old 07-13-2019, 05:03 PM
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Quote:
Originally Posted by asarose247 View Post
you'll be glad you went for the nx3000D
^^ That. Be sure to get the DSP version.

Quote:
Originally Posted by asarose247
BB or a good plywood, way much smarter than MDF,
^^ And that. I've given up on MDF strictly due to the mess. If you have a good BB supplier go with that, if not, you may find that some of the cabinet-grade plywoods available in your area are structurally as sound. A bit hit-and-miss here, the local Lowe's has lauan plywood in 2' x 4' pieces that have been very good to work with. Shame they don't offer it in larger panels here.

Sub builds: Yet another Infinity 1260 build | Twins! | Modified V.B.S.S. build | UM12-22 builds | AV stand and sealed UM18s

Speaker builds: DIYSG HTM-10 build | DIYSG Volt-6 build | DIYSG Fusion-8 builds
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post #12 of 15 Old 07-13-2019, 06:52 PM - Thread Starter
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A few spots around here to get BB in 4x4 and 4x8. I have never had sealed box except in my wife's 4runner Does the ultimax 15 or 18 do much below 20hz at all? I would consider a pair of 15s sealed or a pair of 18s
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post #13 of 15 Old 07-13-2019, 07:13 PM
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If you decide to go with sealed, Parts Express sells flat packs for both the 15" and 18" Dayton UM Subs and they ship free. That's hard to beat.

7.4.4 Theater Room: JVC-RS46U, Silver Ticket AT 2.35:1 142”, Onkyo RZ830, Anthem PVA-7, Panasonic DBT-110, JBL Studio 270’s, 4 - 15" DIY Sealed Subs

3.1 Living Room: Samsung 64” F8500 Plasma, Anthem MRX 300, Dynaudio Audience 52’s, Dynaudio Audience 122C, NHT SubOne
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post #14 of 15 Old 07-13-2019, 07:22 PM
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Quote:
Originally Posted by Bigbirney View Post
I have never had sealed box except in my wife's 4runner Does the ultimax 15 or 18 do much below 20hz at all? I would consider a pair of 15s sealed or a pair of 18s
I had never built sealed boxes until recently, a pair of UM18 in ~5cuft net (+ 1x VBSS), and they pound in our living room. I get high output into the mid-single digits according to measurements.

Having said that, these are in our living room on a suspended floor, so the measurements are skewed. And you are not likely to fare as well in a basement. I would look at the 21Hz VBSS first - It's inexpensive and you'll get an idea of what you want/are missing. Having the NX3000D gives you the option to add a larger, lower tuned box later.

Sub builds: Yet another Infinity 1260 build | Twins! | Modified V.B.S.S. build | UM12-22 builds | AV stand and sealed UM18s

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post #15 of 15 Old 07-20-2019, 10:44 PM
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Quote:
Originally Posted by Bigbirney View Post
The VBSS looks like a good start. I think I may build 2 to start. I would rather use Baltic Birch than MDF though. So it's OK to buy the NX3000and just run one Channel? I thought about the 1000, and just giving them 500watts a piece, but that may not be enough.
Yup. Running these on one channel of an inuke3k, essential the same amp. Sorry abut the picture being rotated.
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