My Strada Is are been reported by Audyssey XT32 and the Omnitronics phase tester LH-090 as been wired "in phase" too. That's fine.
The reason for looking at the phase at all was, that both systems used for measuring (Audyssey MultEQ XT32 on my Denon 7200WA + Ncore amps and the LH-090 phase tester) have consistently reported my Reference 3.5s (front L+R) as been acoustically "out of phase", which seemed strange to me, because wiring, amps etc. all measured correctly "in phase" and have been verified several times. Other speakers used before produced no phase errors at all. They haven't been connected accidentally "reverse phase" at the factory as suggested. One speaker might rarely happen, but not both...
Note: What should happen: the rising edge of the signal should produce an outward (push) action of the piston / cone of the driver when "in phase".
I repeated my measurements then with my audio measurement computer Phonic PAA6, which uses a different, adjustable and lower frequenenc range (20-200 Hz) compared to the LH-090 and signal type (triangle wave) and a calibrated pair of microphones compared with the LH-090 for measuring polarity, which employes an impulse signal repeatedly for measuring phase with a single mike. The Phonic PAA6 showed some polarity reversals in the bass region but most of the frequencies measured were in phase with the exciting signal.
The battery test using a 1.5V battery was less useful than usual, bcause little movement of the bass driver was visible by hooking it up the usual way, connecting noise mostly heard from the mid range drivers. The lower Ref 3.5 speaker connection produced a "thump" only from the bass driver with little visible movement too, but what i saw seemed to suggest, that it moves somewhat outward using the standard connection.
I decided then to connected them as labeled on the rear, trusting the manufacturers markings.
Measuring this way afterwards showed a F3 point for the Ref 3.5s of 60 Hz, whilst measuring with reverse phased gave an F3 reading of 90 Hz. At least the bass region sounded more pronounced, when using the standard connection, that's for sure. I will do some more test runs measuring them in phase and reverse phase and saving those results to my computer over the net and listening to the corresponding results. There may always be areas which are somewhat out of phase, but interacting with the rest of the speakers they should be "in phase" as expected.
Last edited by gurkey; 02-14-2017 at 11:50 PM.