Why does my tube amp

Casey621,
I found a Stereophile review of your speakers & the relevant measurements here:
http://www.stereophile.com/content/psb-platinum-t8-loudspeaker-measurements

if you look at the Fig 1 - impedance & phase plots - you can see that when the freq is below 100Hz (mid bass & deep bass regions), the impedance of your speaker actually goes up (usually the impedance goes down in most speakers).

The reason, I think, is quite simple - the Jolida is operating in a constant-output power mode while the SS amp is operating in a constant-output voltage mode.
In the bass region when the impedance goes up, the Jolida maintains constant output power. Since the impedance is larger in the bass region, the output current from the amp goes down while the output voltage goes up (while keeping output power constant. Remember than power = voltage * current). So, the Jolida is adjusting its voltage & current outputs instantaneously depending on the speaker impedance while keeping output power constant. Higher voltage drive to the speaker is what's needed by the speaker drivers to create pistonic motion which generates SPL (& sound) in the room.

The SS amp, OTOH, is operating in a constant-voltage mode so when the speaker impedance increases, the output current drive decreases (less current into a higher impedance - makes sense). With the output voltage remaining constant, the product of voltage * current reduces into this higher speaker impedance. The SS amp is constantly adjusting its output current & output power as the speaker impedance changes while keeping output voltage constant.
So, if you could compare the voltage drives from the tube & SS amps, I bet that you'd see that the SS amp has a lower voltage drive into the speaker. This would mean less voltage for the speaker driver & less pistonic action by the said speaker driver. Therefore less SPL in the bass region with the SS amp.

hope this clarifies.

I'd buy Jolida gear in a heartbeat if someone can convince me they are well built, reliable and will last a long time.

Also are there still two Jolidas around these days? There was a year or so back. Too confusing knowing which Jolida ifa ny Jolida to trust.

On the plus side, Jolida gear I have heard has always sounded nice.

Thankyou everyone, yes Bombaywalla with SS amps the speakers sounded almost out of phase. The mid and treble region would rise quickly with no response from the bass. I had a little luck with very short 3ft 10gauge speaker cables but then i thought it was speaker placement. I read an old thread here and they descibed the same problem with some EgglestonWorks speakers. Thanks for pointing that out Bombaywalla as i know nothing about how electronics work. I am a backyard motorcycle mechanic and tend to look at things in a larger means more power kind of way. Mapman im not sure but i think the other Jolida is Doge now? The build quality seems very good to me,really good when you consider the price.

Measurements are hopefully facts and facts are always your friend.

There can be a strong case made to never buy anything that has not been thoroughly measured by an independent source prior. Specs are helpful for narrowing down choices but seldom tell the whole story. Then there is always just trial and error. Yuck. Takes forever and can be quite expensive. Deaelers might like it though cause you buy more stuff until you find teh right combo that is just meant to work and sound great together. When they do, there is usually a reason and teh measurements may be the only way to truly know why.

Mapman...my Jolida is well built, reliable, and no clue how long it will last but it works like new after 3 years of abuse...uh use...Jolida MD is the only Jolida that matters (Mike Allan is there, and he started the thing).