The Hammer

The Hammer

Chuck Morris

Project Category:

Project Level:

Project Time:
8-20 Hours

Project Cost:
$100 – $500

Project Description:
Dual opposed 10″ subwoofer with outboard DSP/amplifer

Design Goals:
Smallish form factor, dual opposed, force canceling, visual match to my MidNite Magic project

Driver Selection:
Dayton Audio LS10-44 DVC subwoofers P#295-251

Enclosure Design:
Sealed 15″ cube, dual opposed driver layout

Enclosure Assembly:
3/4″ material throughout, 1/2″ BB ply added at driver baffles, 1-1/2″ brace connects top, bottom, front, and back walls. 1lb of loose polyfill, walls lined with 3/4″ 3layer Sonic Barrier. Jacks located on bottom.

Crossover Design:
Active via DSP in amp

Tips & Tricks:
The cabinet needs to be well sealed. Add additional sealant at all joints if necessary. I had to upgrade the Nuetrik connector as the plastic version failed under heavy volume.

The sub performs better than I had hoped. Clean, deep, and virtually resonant free. It does a great job of filling in the last couple of octaves in my rooms.
What makes the system work is the DSP in the inuke amp. I used the PEQ to add boost that lowered the f3 to 25Hz. The subs handle everything the amp is able to provide and with more than enough output for most.

About the Designer:
I am member of the Speaker Builder Design Team

Project Parts List:

Dayton Audio LS10-44 10″ Low Profile Subwoofer Dual 4 Ohm
Behringer NU1000DSP iNUKE 1000 Watt Power Amplifier with DSP
Sonic Barrier 3/4″ 3-Layer Acoustic Sound Damping Material with PSA 18″ x 24″
Parts Express Cast Frame 1/4″-20 Speaker Mounting Kit
Dayton Audio DSS3-BK Black Speaker Spike Set 4 Pcs.
Dayton Audio BPA-38NI HD Binding Post Pair Nickel
Neutrik NLT4MP Speakon STX 4 Pole Male Chassis Connector Metal Housing
1 lb Loose Polyfill

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