@hifi28 In my even smaller room I got the CS3.7 to work very good and this was with a nightmarish COAX situation (slowly resolving). My room is acoustically treated. I know almost all the posts on A’gon say the CS3.7 requires a fairly large room, I think there are ways around that. I have photos on my virtual system.
Yesterday, I thought I would see how loud I could crank the CS3.7 for 1 complete song (without lowering the volume). I only got to 85 dB on my iPhone meter. In a larger room I know for sure I would have had it much louder, based on past experiences with other speakers in bigger rooms. Makes me wonder if I should be happy with a single AHB2 (something like 292@2 Ohms) . I have not tested out if more wattage is helpful in low volume scenarios. That is last on my ToDo list.
As an update on my journey.
1) Today I fixed the broken COAX screw thread on the frame using the RECOIL kit recommended by Rob Gillum. Great stuff.
2) I bought 2 black COAXs from Rob yesterday. They may arrive before Thanksgiving but I will use the time to do #3.
3) I just bought some water based stain to put on the speaker. Now that the COAX are removed it was easy to carry the speaker to the garage to sand it down and then add 3 coats of the stuff I just bought.
One of the COAX’s was first out-of-phase. I fixed that and it sounded much better. Then today after testing the circuits with an Ohm meter I am almost 100% certain that the crossover wire for the midrange was connected to the tweeter and crossover wire for the tweeter was connected to the midrange. I have not confirmed with Rob Gillum yet. The second situation is supposed to be very very bad. I am assuming the tweeter on that COAX is damaged. The measurements did show that there was a problem on the high frequencies. This was not the fault of Thiel it was a DIY issue.
Getting close.
