Thanks to all the community for the joy of being able to lurk (for 2 months) and learn from your knowledge and experience.
I currently have an Onkyo TX-SR875 AV receiver that powers Polk Audio LSi9/LSiC up front, with a couple of Polks mounted in the back wall.
IMHO, I've been lacking mid range depth and woefully short on sub impact for movies.
Budget constraints limit the scope of my ambitions, so I've chosen to build the following:
- One 1299 Center to replace the LSiC
- Two Marty cube subs
- Two 1299 L/R (next year if/when funds are available)
Based on all your collective wisdom, I've already acquired:
- 1299 Center kit from
(excellent service and packaging) Arrived yesterday - feel the excitement!!!
- MiniDSP UMIK-1
- iNuke NU3000DSP (I've modded the fan with a Noiseblocker NB-Multiframe M8-1 Low Noise 1200rpm, 7.8 dBA - SUPER QUIET!!!)
- (2) Dayton Audio RSS460HO-4 18" Subwoofers
- Speakon connectors/cables/adapters
- Misc wire (14ga) and quick disconnects
- Grill cloth (Joann Fabrics) - might upgrade to something nicer later depending on final appearance
- Neodymium magnets in a couple of sizes for grill fronts (pairs of N/S with center hole for mounting with a screw)
- Misc screws, glue, tools (i.e., counter sinks and forstner bits), etc.
- UltraTouch Denim Insulation (R19 5.5 in thick x 15in wide)
I'm using 3/4" Red Oak Plywood, with the intention of staining and finishing the subs.
I'll be painting the 1299 center black.
I pulled out my old Sears table saw from the corner of the garage and started cleaning it up and adjusting it for active duty.
I changed the saw blade from a rough cut to a 72-tooth carbide blade for cutting the plywood. It was OK but not perfect.
I've resigned myself to the fact that this first build won't be a work of art, but they ought to sound pretty darn good when finished.
First step was to setup and enhance a set of sawhorse for the large sheet work.
I chose a setup described by David Radtke in a video "Video: Build a Portable Sawhorse Table
" at The Family Handyman.
Two software tools were invaluable; SketchUp for studying another posters work to model the Marty Cube, and MaxCut for laying out the panels that would need to be cut across the sheets of plywood in an efficient manner. Highly recommended!
Last night my lovely assistant (of 35 years) and I started about with the cutting.
I was very intimidated at the prospect of cutting a 4' x 8' panel in half on a medium size table saw without any accompanying outfeed rollers.
I decided instead to draw up all the lines on sheet one and cut it in half with a power saw, following a guide (48" level).
While the cut was straight, the blade made mince meat of the (thin) top oak ply.
Argh and oh well for now.
Sanded off the rough edges and moved on.
In all we cut down three full sheets before calling it a night (too dark to be safely cutting in the driveway by only 2 spotlights.)
You know the old adage, "Measure twice, cut once." That only works if you brain doesn't get scrambled and you measure the right dimension.
Yeah, I screwed up and cut two panels too short. Learning by experience. Thankfully, I had foreseen this risk and previously bought a 4th sheet for insurance.
We'll get back to cutting tonight.
My attention is now on to the 1299 crossover.
I would like to take a crack at physically making the the 1299 crossover myself, but would be most appreciative of a little guidance from others with more experience, like
I've seen some really nice pictures of the work he's done on the 1299 crossover on another thread
I was going to use a simple piece of 1/4 luan plywood as a base.
I'm looking for a template that describes the component placement, both on (1) the top side surface layout as well as (2) the underside point-to-point wiring.
I have the schematic from
, but not sure I trust myself with the translation.
Another consideration in crossover implementation, not so much for now on the center, but in the future for the L/R, is the physical wiring differences to allow for Bi-Amping the 1299 towers. I currently bi-amp the Polk LSi9's and might benefit from this on the 1299s as well since I'm not running a 7 channel system, nor have any expectation of doing soon in the near future until the whole rig gets upgraded in a couple of years.
Thanks for listening and for any tips.