As long as the amp has enough grunt to drive the speakers and unless you have very decearning ear there will be little difference. What you may notice if the Caspian 4g has more "power" (not necessarily watts) is less strained when turned up loud, it may deliver its sound with less effort. Looking at the spec of your speakers they do require a bit of juice to run to there fullest just dropping under 4ohms but id say your amp has enough juice.
BUT your speakers are small and will reach a point when turned up where they start to compress (all small speakers do this), they may do this before even your current amplifier struggles deliver. So the advantages gained over the "better" amp are lost (this is just one example) can you see what i'm saying? its not as easy as saying "buying this expensive thing is better".
You have matched price wise you're amp pretty well to your speakers id say everything you have is In the same price range 1500-2500rrp.
Making small jumps within product ranges I fail to see the point I just don't hear the differences and anybody that says they can Id look upon with great scepticism . 1500/2k jumping 5-6k yeah you will hear a difference (just) 2k jumping 3k its just not worth it unless it has a feature set you want, like an inbuilt dac on the whole this is mostly companies pushing what a component is worth. ie greed.
You can see this in some companies ranges, technics for example they sell a mid range 2.5k amp the next run up the ladder for them is 7k monster and when you reed the reviews they all say the same thing the 2.5k amp steps on the toes of the 7k. Yes there's a difference it's a 4.5krrp jump but the differences are very very slight. What would I buy? the 2.5k amp its the better amp pound for pound.
Im rambling a bit, basically Hand on heart I can sit here and say you'll hear a difference between your and that amp I think it will be very unlikely given many factors some of which ive outlined above.
Thanks for your input. I like your thinking. Key points raised:
1) Limitation of current speaker
2) Sound quality improves significantly with significant price point increase
1) your feedback is spot on. Yes I have plan to continue my journey. Current speaker is not my end state. I would like to see my journey end with a speaker in the range £5000 to £7000. No more. Also given my limited living room space, floorstander is out of the question. The K3 has enough juice 150W driving the 607, which requires 30W-120W 8Ω. Yes so far so good
2) your second key input, that’s more profound. Now it forces me to think deeper. It is undeniable that hi fi company must make profits. Hence, as consumer, we gotta be more savvy. Your pound-for-pound idea, that’s a good start to ponder where to invest our hard-earned money. However, I wouldn’t make the big jump (£4.5k) to actually see an immediate end-point in sound quality. If so, then the journey ends, and that’s not fun.
I also need to ask myself what do I really want for “better sound”. Actually, I have spent more on CDs; there are a lot more bargains these days. I really have enjoyed my music so far. Although I love the sound of music from CD - it’s clarity & crispness - I can’t deny the streaming technology has closed the gap. My current streamer (Arcam ST60) is awfully good playing from Tidal service. I think I would like to hear deeper voice-textured sound, bigger soundstage and less rumbling bass, but more taut. Bass! Yeah, some time down the road, my current B&W 610, will fall on the way side. However, stereo sound matters more to me than home-theatre sound.
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