Marv, first of all I really liked the CAOW1s, they are great speakers. There wasn't enough bass, without a sub, which would mean adding one (less WAF). Painful as it was I had to make a hard decision. Then is when Dennis told me of the Philharmonitor 1 for a client, the first designed and he said it sounded pretty good (he he, his modesty showing again). He said with a larger enclosure would produce more bass. So, I commissioned him to do it and I am glad he did.
First of the the CAOW1s has the ow1 tweet, the monitor 2s, the fountek, I consider it smoother and more air reproducing highs which was an improvement over the ow1 or ow2, mine had the improved version of the Ow2. Dennis said, in comparison with the MBOW1, he could hear the "superior highs of the Fountek tweeter".
Second, the 7" Seas verses 5" Seas would definitely produce more bass and with the .75 guaranteed it..... bigger driver, bigger cabinet. He also told me the sound is very smooth and open. SOLD!!!
Having listened for awhile, I would completely agree with him. When I first hooked them up, I had the Genalex Gold Lion KT77 Tubes in my amp 6.5wpc, and the sound was so forward I had to lower the volume. The bass was strong, I had to get use to that, but the tubes were removed as I heard a loud buzz several times and was worried that it might damage the speakers at high volumes. One of the tubes was going bad. I then plugged the stock tubes back in and the sound was more laid back. Interesting the difference tubes make. But the monitors amazed me.... sounded fantastic even with cheaper tubes.
At this point I think I was hearing the CAOW1s multiplied, these Philharmonitor 2s sounded like towers, big bold sound, tight bass and the fountek really clear and airy. They are BIG monitors and they produce a BIG sound....seems to me they could be used in theater and create a great sound stage. However, I do not think the price will be a whole lot less than the Phil2s.
And, of course, Dennis' hard work in developing a unique crossover to make them shine. They are a worthy investment!
Oh, I also will be adding a small SS amp into the mix, sort of a backup!
Hope this helps!