I wonder what the differences are between your 1.3a's and my 1.5's. They look the same and seem very similar in that listing.
Doesn't really matter, I know, as long as we like them!
1.3 spec's:
Two-way, sealed-box stand-mounted loudspeaker. Drive-units: 1" metal-dome, neodymium-magnet tweeter; 6.5" polypropylene-cone woofer. Crossover frequency: 2.4kHz. Frequency response: 39Hz-22kHz, ±3dB. Sensitivity: 86dB/W/m. Nominal impedance: 8 ohms. Recommended amplification: 15-175W.
1.5 spec's:
System Type: 2-way, 10-liter acoustic suspension design, Focused Image Geometry
Driver Complement: 6.5" long-throw polypropylene woofer, 1" fluid-cooled aluminum dome tweeter
Crossover: 3.3KHz, 12dB/octave high-pass and low-pass
Response: 53Hz - 25KHz, +/- 3dB
Sensitivity: 85db (2.83V at 1M)
Impedance: 8 ohms nominal, 6.2 ohms minimum
Recommended Amplifier Power: 20W/ch minimum, 150W/ch maximum
Inputs: 5-way binding posts
Weight: 16 lbs. each
Dimensions: 16.5"H x 7"W x 10.25"D
Finish: High gloss black, mahogany or sycamore laminate