That's an awesome setup and it will deliver exactly what you want by the sounds of it!I am going for Gungnir + KGSSHV(or KGST?) + 007, which should be pretty great, from what people are saying. I found XS quite excellent technically, but I'd like something a little warmer and smoother/relaxed. Too much treble emphasis/fatigue for me.
And yea the XS is a great headphone. It is my go-to recommendation for the $500 and under budget range nowadays.
For $500 you can barely scrape together a really awesome 'stat setup (SR-5 or SR-X Mk 3, SRD-7 transformer, ~$150 Class D speaker amp to power the SRD-7 from) but that is a tough ask for most people when they can just get a XS and power it from their phone.
I have been listening a lot to the SR-5 recently - at its current street price of $150-200, it is one of the best deals you can get with estats. Yea its bass extension leaves a lot to be desired, but I'm not sure you can do better than an SR-5 in the sub-$200 range when it comes to resolution, transparency, and timbre. A bass shelf EQ also helps with the low-end.
It is outclassed in basically every technical metric like resolution and soundstage/headstage by both, but to my ear it has more organic tonality and timbre than the 009 and it delivers a comparable lush, thick sound to the 007.How do the kaldas compare to the 007s and 009s ?
So I would not put it in the Omega-tier, but they are very respectable and have a unique sound, and they cost a fraction of the price. It is in the same tier as the best Stax that aren't Omegas (e.g. L700, Lambda Sig, 404LE).
For me it also has a lot of added value specifically because it sounds unique - the majority of Stax's historical lineup are Lambdas and at the end of the day, they all deliver a certain "Lambda sound" even if there are notable variations. The RR1 on the other hand doesn't sound anything like a Lambda, in fact if it wasn't for the 007 it wouldn't sound like any Stax period. It is dark, thick, and euphonic, if anything it is sort of like an HD 650 except turned into an estat and given better technical qualities.
The RR1 and NectarSound Hive are both very underrated in my opinion especially at their price points of $500 and $600 respectively. At this point I have heard most estats in the sub $1000 range, vintage or otherwise - the RR1 and Hive really outclass their price points, and you can buy them brand new with warranty/customer service to boot.
The next non-Stax estat I want to try is the ES-1A which @bigjako has told me about and sounds really excellent. I have high hopes for that, my only concern is the weight since Audeze in the past have been non-starters for me due to weight discomfort.
Right now I have an ES-Sigma with L700 drivers on the way. I am excited to try that and compare it to the stock L700 I owned until recently, I feel like the Sigma enclosure will actually alleviate some of the issues I had with the L700 and could potentially turn it into my favorite non-Omega Stax. I will report back once I've put it through its paces

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