Phase inverting problem

I have a Manley Steelhead which I run full tilt into a Lightspeed Attenuator and then into a pair of mono blocks.
I assume everything is phase correct.
Cd is run directly into the LSA and to the amps.
To my ears the cd sound is much fuller,which bothers me, because the lp sound is thinner by comparison.
I am thinking there maybe a phase issue with the phono stage added to the mix.My memory is going, but I seem to remember somewhere in the past that when you have 3 stages, it puts the system out of phase and you need to switch at the speakers.In my case I will try reversing the leads on my cartridge as it is less full and perhaps out of phase.
Any thoughts on this?

Lacee- I'm not able to answer your technical question about whether the
number of stages causes some sort of phase inversion, but I can tell you,
based on my experience running a Steelhead for a number of years that:
1. It sounds better if power is always on to the power supply and you are
simply switching off the active circuits using the standby switch on the main
unit;
2. I preferred the sound of the unit through a separate active line stage,
rather than running it with its own buffered volume control. Whether that's
directly comparable to what you are doing by running the Steelhead fixed
outputs into a passive line stage, I dunno, but I offer it for what it's worth.
The unit sounded very 'clear' but a bit threadbare running it on its own
(without the addition of the separate line stage, which added more meat to
the bones-
call it 'warmth,' 'richness' or 'euphonic coloration,' it had a less 'forced' more
relaxed sound). At the time i was running a Lamm L2 which may have been
very complementary to the Steelhead, b/c the Lamm had a very lucid, if
somewhat 'dark' sound and rolled off a bit at the frequency extremes.
3. Using Lyra Titan i and later Airtight PC1, I preferred the sound through
the MM inputs run at 47k. The MC inputs sounded uneven across the
spectrum. I did fiddle with the loading and other settings, but that's where I
came out.
4. I think the gain setting on the unit was at 55.
5. I found that tube rolling made a pretty significant difference- my
preference being the NOS Tele equivalents and running other NOS for the
7044 slots. On that note, it may be worth changing out the tubes to see
what difference it makes.
I did a fair amount of fooling around with the unit when I owned it- and I
think that summarizes where I came out.

Lacee, if you are running a preamp already you certainly don't need the passive volume control after it. I would have to imagine that is messing with your bass!

Check the setup and loading on the cartridge. Absolute phase won't make the system should thin: something else is up.

I see a black ground wire going in the bottom of the tonearm, but I don't know where it is connected to.

The black wire is connected to the aluminum arm wand by the screw that hold the arm wand into the pivot assembly. At the arm board PCB it is connected to the green tonearm wire, the ground return of the red interconnect as well as the ground wire. The blue wire is only connected to the ground return of the white interconnect and nothing else.

I hope this helps. If needed I can upload a photo of the arm board to my system page. Let me know.

I sort of figured things out.
Reading past reviews, all seemed to say that running the Steelhead in the fixed output mode into a pre amp( LSA in my case)would be better sounding, so using it as a phono stage minus the volume control is what I've settled for also.
I was running it the other way, because you can't access the mono feature in fixed mode, and I occasionally listen to mono recordings.

Also, running the cartridge(Clearaudio Talisman V2 gold)thru MM stage and not the transformers in MC also has sonic merits.Experimenting with loading, so far 100 ohm sounds good, less cartridge ringing.

So now I am quite happy,thanks for the input.