It's finally "Arizona Winter" so the garage is cool...so it must be speaker building time.
The number of DIYSG speakers continues to grow in my system as I just ordered a pair of HTM-12s as L/R mains to join the 88 Special center (now a year old). There is pretty good data/info out here on these by Matt and Eric. Several things pushed me to the decision:
1. With experience comes comfort. Having built the 88 and six Volt-10LXs now, I'm comfortable with flat pack assembly.
2. Assembled crossover availability. I'm also quite comfortable with crossover assembly as long as there is a PCB for it/them, but this is a welcomed option.
3. The HTM fits my room and design. Large room, niche/baffle wall installation. Reasonable re-working of the niche/compartment needed.
4. The DIYSG designs seem to perform exceptionally well with bass management crossing them above their LF limit. I've noticed that these designs may well reach their LF end working at full-range, but...working with a high pass filter to utilize bass management they sound infinitely better than speakers with LF extending only to 80Hz or so. An example is the Volt-10LX sealed rated at 70Hz sounds amazingly strong and comfortable at 70Hz or 80Hz. I'm confident the HTM-12 will be the same; comfortable. In the baffle wall and with room correction EQ, they will be superb. By the way, the locations in my system for the L/R mains are proven poor for LF below 60Hz due to a large acoustic node at about 45Hz, therefore generating output below 60Hz in the L/R mains is a waste of watts, space, and money. The subs (located a couple feet away in locations friendly to smooth LF acoustic response) take over very well. The HTM-12s have the output capability for Reference I need, especially high passed at 70Hz or 80Hz in a baffle wall.
5. The smooth FR and polar provided by Matt.
6. Matt's description of the mids and highs afforded in this new design. That said, I'm expecting a harmonious blend with the 88 Special DNA-360.