Help with Spendor S8e . No Bass

I just bought a pair of like new Spendor S8es on this site from a reputable gentleman. I bought them to replace my Spendor S5e speakers that I have really loved. I was just looking for a slightly bigger sound, and really wanted to raise the soundstage with a taller speaker. I had liked the S5es so much (and the C5e and S3es that I also have), that the S8e seemed like the ticket. Well I got the S8es and they look brand new. Hooked them up, and there is an entire frequency band from about 150hz to 50hz that is just not there. I mean, I hear nothing from that range coming through at all. Referrence tracks that I would feel powerful bass vibrating through my listening chair, had me feeling nothing at all with the S8e. The thing that has me most perplexed, is that the highs, vocals, and midrange sound incredible. And it is a two way speaker. How is this possible? I thought it must be a crossover problem, so I pulled the crossovers, and I don't see anything visually disturbing. No burned traces (and they are huge traces by the way), and none of the caps/coils have come loose or look discolored. I really don't know a good way to test the caps and coils while in circuit, and I don't particularly want to tear them apart. Also, they don't have the specs written on them. I decided to run an Audyssey test on the speakers, and they measured down to 150hz only. I realize Audyssey is not the most accurate, but it usually hits it dead on for me if I run at least 6 positions. I don't see any way that room positioning can be making that big of a difference can it? Shouldn't the S8e have more bass than my little S5es did? All of the reviews of the S8e talk of its great bass. Also, how can a 2 way speaker sound AWESOME in every other respect? And why would both speakers show the same propblem? Is it possible that something is bad in the crossovers that would not be visually aparent, and would allow the speakers to sound great everywhere but that range? Any help is greatly appreciated. System consists of the following:

Onkyo TX-SR875 used as a preamp for HT
Parasound 2100 Preamp inline from pre to amp for mains
Mcintosh MC7106 running in 300X3 for Mains and center
Hafler DH-500 for surrounds
The AR Turntable
Arcam Alpha 9 CD player
Spendor S8e for mains
Spendor C5e for center
Spendor S3e for surrounds
Tributaries silver interconnects for mains
DNM New Stereo interconnects everywhere else
DNM Precision Stereo solid core speaker wire in bi-wire

Oh yeah, I tried every config I could think of, different interconnects, speaker wire, amp, sources, u name it. PLEASE HELP!