As four ohm speakers go, Maggies usually have a fairly benign curve and are usually not that hard to drive.
All other things being equal, if you have a 4 ohm speaker and an 8 ohm speaker, you will always find the speaker cable to have a greater effect on the 4 ohm speaker.
About 25 years ago I saw a nomograph published by RCA (if I recall right) that showed the impedance of the speaker, the output impedance of the amp, DC resistance of the cable and the damping factor the amp is able to express (Crown publishes something similar in one of their amplifier manuals). What you see is that in 4 ohm speakers if the cable has DC resistance of more than a few 100ths of an ohm, that the effect on damping factor is rather profound- much more so than one would intuit.
Essentially with 4 ohm speakers the cable becomes critical and should never be long- in most cases less than 6 feet (bass impact and resolution can both suffer)! By contrast a cable for a 16 ohm speaker can by much longer and not be nearly as heavy with no worries. That's why a lot of us old-timers got away with using zip cord in the old days...
All other things being equal, if you have a 4 ohm speaker and an 8 ohm speaker, you will always find the speaker cable to have a greater effect on the 4 ohm speaker.
About 25 years ago I saw a nomograph published by RCA (if I recall right) that showed the impedance of the speaker, the output impedance of the amp, DC resistance of the cable and the damping factor the amp is able to express (Crown publishes something similar in one of their amplifier manuals). What you see is that in 4 ohm speakers if the cable has DC resistance of more than a few 100ths of an ohm, that the effect on damping factor is rather profound- much more so than one would intuit.
Essentially with 4 ohm speakers the cable becomes critical and should never be long- in most cases less than 6 feet (bass impact and resolution can both suffer)! By contrast a cable for a 16 ohm speaker can by much longer and not be nearly as heavy with no worries. That's why a lot of us old-timers got away with using zip cord in the old days...