I love my L700s to be honest, if I want darker and punchy headphones, I go back to my Klipsch HP3s and party mode. That said the X9000s are on my radar now as I climb the ladder (If i stop spending money on transformers and amps). That said Corina has my interest also but cannot own them all…

From my experiences of trying to sell my SRM-1 without headphones and people saying im selling it incomplete…. 99% of people have NFI what STAX is let alone a transformer box…

It is funny that Lundahl directly link to the project of using 1630s for electostats but haven’t tried to make something bespoke and designed for the application…

As long as you’re sensible with it and have a good preamp, don’t hot plug anything, you should be fine. I have used a Sony TA-N9000ES power amp and that was 275W/pc and my current daily driver Sansui 907MR is 200W/pc but it has volume control lol.

From what I experienced, playing with various transformers, its generally around the winding resistance and amplifier interactions. You can shift around and manipulate the frequency response by using a series resistor on the primary side and playing with some parallel resistors on the output...

Thanks for sharing results, been curious about toroids after someone mentioned it in one of my videos, haven’t really done square wave testing at anything other than 1khz on mine but there is a little overshoot that settles quickly on 1630s. That said if you’re using a DAC etc it could just be...

It’s nice to just take a step back and enjoy the versatility of transformers… Everything from lush Sony VFETs, Yamaha’s first active servo amplifier and a freshly serviced Sansui Alpha flagship :o2smile:

Interesting, thanks for sharing that as I had not considered it. Makes me ponder if STAX factor this into their amps at all or its still the rule of linear is linear and voltage / amplitude as flat as possible across the audio spectrum…

This is something I have never seen a straight answer on what is the max safe voltage before the diaphragm hits the stators. I would have thought it was related to the bias voltage but most direct drive seem to be 1600Vpp max? Honestly I rarely saw 300Vrms on my meter with music just watching...

So heres the issue… Most manufacturers “rate” their voltage swing at 1Khz… but that is the easy part. What should be happening is showing maximum voltage swing into standardised load from 20Hz to 20Khz on a graph… If you refer to my last graph, my STAX SRM-1 meets or exceeds its Vrms rating at...

It would be interesting to play further in just a test setting. I get the impression that 2 x 1630 is starting to run out of drive current as a 2 probe measurement is starting to pull down the output voltage at higher frequencies, similar to what I would see on the SRM-1 when I tested it. 4 x...

Ok so this summarises a few weeks of work which I can share with everyone, long story short I have been pursuing the EDCOR transformers and also pursuing another avenue which is to "team up" 2 Lundahl LL1630PP's to improve low frequency saturation performance. Results seem very good for the...

Im not completely sure but I think the L700mk2 metal bridges can be fitted also? I think you can 3D print also

How you take measurements will also significantly affect readings, here is a new prototype Lundahl LL1630 setup, floating single probe measurement vs grounded. This is at 1KVpp output vs the transformer input. Keeping in mind this is one of my cheap sacrificial amplifiers for testing lol, not...

Most noise is already in your conductor wires and introduced from other devices on the same wire runs back feeding into your house circuits. That is why any self respecting devices have input filters, isolation transformers and power supply regulation… Likewise the wires running up your walls...