Are the KEF Blade/Blade 2 Metas a Significant Upgrade from Blade?

????????????? I just looked up the specs on the 175XD and the 300XD and the gain is exactly the same....26.2db. They will play together perfectly. And the output impedance is so low in both of them that it won’t have any effect on gain or frequency response as well. You are good to go....unless there is some other issue.

Input sensitivity means how much input voltage gives full power from the amp.....since the 300 can put out more power then you need more voltage to get ALL of its power.........What is important is the actual GAIN of the amps.....and they are the same.....so biamping with them is perfectly fine.

Well I read the part about input sensitivity and output impedance on the internet. I thought everything on the net was true.

Bi-Wiring and Bi-Amping Explained - How To Improve Your Audio Setup | Audio Advice

Your post is encouraging I also asked KRELL today the same question. My CODA 07x preamp also has dual XLR outputs so I can easily send 2 stereo amps the same signal.

If two amps have the same power rating......then the "sensitivity" would matter and it would imply a different gain structure.  The thing that matters is gain.....that is what will determine matching.....and you have it.  And the output impedance will only affect frequency response if it is really high....both amps are very, very low.....7 and 15 millioms........so even into 2 ohms there will be NO loss whatsoever.

it is also good that both amps have a high input impedance (200K).....then two of them in parallel is 100K.....still plenty high.....and easy for the preamp to drive.

Only what I write on the internet is true.....he he....I am NEVER WRONG......except when I am....

with my R105/3 even with a 93.5 db sensitivity I still horizontal bi-amped them with a krell kav 300il on top and a B&K 4420 driving the bass. The Blades are a much easier load and the quality of the uniq is miles ahead. IDK how big a room you're trying to pressurize but the Hegel H590 is powerful enough to drive the blades full range to +100 levels in my 17x27x7' basement listening room and with full, hard hitting bass I find I don't need to turn the dial quite so high.

I personally would never be interested in a speaker with such low sensitiviy and has tons of parts in the crossover. The crossover parts and the binding posts and wiring are very, very good in the Kef Meta......but pale against parts you could use if you are going all out. Also the wires from the crossover are not wired to the voice coil wires on the drivers. There are ton of other speakers that I woulld choose over the Kef and/also DIY speakers you could make real simply that would better the Kef.

For instance....check out the NSMT 100 speaker......for $13K you get powered built in sub.....NO....I mean NO crossover on the bass/midrange.......and just a single cap on the tweeter....with fully time and PHASE aligned design. The top end is something ike 92db effeciency so you can use lower powered amps. Of course, I would remove the binding posts and use a clamping system using plastic hardware, use better wire, hardwire the midrange to its voice coil wire, add bybee clarifier to the back of the midrange....add my Music Purifiers and Ground Enhancers......and be in heaven. NSMT is not on the cover of Stereophile, so is little known.......but check out the few reviews there are.....pretty much all raves. I bet these would be much better than the Kef......and with my simple mods would be mindblowing. You could also get some full range drivers and blow your mind as well.....you can augment full range drivers on the bottom with active bass and add super tweeter.......Lii Audio drivers from China are incredible for the money....more serious money can get you Cube drivers or Voxative drivers, etc.   Kef....nah....too dang many parts in the thing. If I had one I would remove the entire xover boards and completely rebuild them using state of the art parts, etc.....then the thing would sound like OMG.......but stock.....just another very good speaker.