Hi agentfox1942,
If you scan down the specs list on the left-hand side of the M80 v2 page, the crossover frequencies are listed there:
Millennia M80 Specifications
Enclosure: Triple Vortex / Reflex
Max Amp Power: 400 Watts
Min Amp Power: 10 Watts
Freq Resp +/-3dB (Hz): 34 - 22kHz Graph
Freq Resp +3dB- 9dB (Hz): 25 - 22kHz
Impedance (Ohms): 4 Ohms
SPL in Room1w/1m(dB): 95 dB
SPL Anechoic 1w/1m(dB): 91 dB
X-Over 160Hz & 2.3kHz
Tweeter: Dual 1"
Woofer: Dual 5.25"
Sub Woofer: Dual 6.5"
Dimens. H W D (inches): 39.5" x 9.25" x 17"
Dimens. H W D (mm): 1003 x 235 x 432
Weight (lbs) each 56.8 lbs
Weight (kg) each 25.764 kgs
The dual 6.5-inch woofers cross over to the dual 5.25-inch upper bass/midrange drivers at 160 Hz. The two midrange drivers cross to the dual tweeters at 2.3 kHz.
It's really a matter of nomenclature. The 6.5-inch woofers are not true subwoofers; however, they do cover bass frequencies that are typical of many subwoofers-- from 200 Hz down to about 25 Hz (-9 dB).
The 5.25-inch upper bass/midranges cover from 200 Hz to 2.3 kHz, so in one sense they are really woofer/midranges.
Personally I describe them as midrange drivers and the 6.5-inch drivers as "woofers" but there is a slight difference of opinion within Axiom's engineering department
.
They are called dual "subwoofers" because the bass extension is unusually deep for a full-range speaker; that said, the M80s will not go as low in frequency as a dedicated sub like the EP500 or EP600. Nor do they produce the same bass output SPLs as the EP500 or 600.
Put another way, the M80 towers have excellent bass by themselves, but nothing like the impact and extension and output gained by using an EP500 or EP600 subwoofer.
Regards,
