the "Gnome" ... a sensitive, yet stout and hearty wanderer of the 12 volt Super T-Amp wilds
Dayton RS-150-4 (4-ohm) 6" woofer with a Seas 27TDFC tweeter
The crossover is 2nd order LP and 3rd order HP, emulating 4th order slopes at 2kHz. ~6dB baffle diffraction compensation. There is no smoothing applied to the chart (below). It shows the unfiltered FRC combined responses and the filtered individual and combined responses, phases. The model was developed by frd/zma plots-Unibox-BDS-FRC-Speaker Workshop method (www.rjbaudio.com
tutorial). Bass below 200Hz would model the direct Unibox slope (flatter to rolloff) more accurately than the FRC combined model (shown) that is intended for baffle diffraction compensation and crossover determination.
Box is 12.5(h)x6(w)x10.5(d) internally. It uses a 1-7/8 PE flared vent. Vent length is your choice. 4 is theoretically flat, (probably better indoors). 3-5/8 is my opt, a ~3/4 dB peak for an outdoor (room reinforcement free) slight boost response, -3dB near 50Hz. Tweeter centered at 2-7/8, woofer at 8, measured from top edge, woofer hole chamfered slightly inside. Vented to back at tweeter level.
Cosmetically, ¾ commercial veneered oak MDF with African mahogany (patio furniture leftover) solid edges, 5/8 roundovers. Damping is hollowed ¾ birch ply shelf brace (5/8 perimeter with 5/8 side-to-side cross-brace at depth dimension center dadoed at height between drivers), layer of B-Quiet (a foil covered bituminous sheet) and then ½ PE Sonic Barrier on back, top and sides, small teased clump of Acoustastuff behind woofer. Finish is spar-poly, a Gnome's favorite outdoor jacket. Shameful addition of burqa (grilles) for portability sake and rubber boots. (hmm, looks like leftover MDF from the Mission, posted above)
reverse polarity tweeter chart shows good phase alignment at crossover ...
balanced, smooth, detailed and great bass for a 6" driver ... impressive performance with a Super T-Amp ... about $100/each component cost