Music First Audio Passive Magnetic Preamplifiers?

I think they are very similar in mids and highs, where I find the LS amazing is in the quality of bass and dynamics - not that the BENT is a slouch, but I wasn't expecting it from a resistor based passive which needs more careful system matching than the TVC. If the quality of the attenuator is of extreme importance, not sure how you can get better than no contact (light) control of resistive values and related attenuation of a signal. Clio9 is far more articulate than I and has done more A/B listening to passive, my listening has been sequential so my comments are more impressions based on memory. Clio9 has done much more heads up comparisons. I can only say I love the Lightspeed in my system and I never quite felt that way with previous passives - though I certainly though they were very, very good and exceptional value compared with actives of anywhere similar quality. I would like to hear a LS attenuation control within my active tube preamps (Joule and Atma-sphere) - it would interesting hear this purist of attenuators to control volume within an active environment.

What the Lightspeed showed me that no other resistor designed passive showed me was that a transformer designed passive (Pubul57 bought the K&K from me) can actually compress the sound a bit, especially in the highs. To me this is not problematic and actually contributes to a slightly warmer and pleasing sound. However, it means that a TVC is not necessarily the last word in transparency and neutrality.

Now autoformers are not transformers since they have just a single winding. However, there is some debate among people I trust who make transformers for a living as to whether the Slagle designs are actually autoformers. I won't get into specifics on that discussion here. However, in my comparison of the Lightspeed and Slagle AVC I own, the AVC acted and sounded like my old K&K S&B, just more transparent and neutral, but not as transparent and neutral as the Lightspeed.

The Lightspeed is the king of the hill of passives IMO. If you have a system that matches up well with it you will be extremely surprised at how good it sounds.

I was at the Lone Star Audio Fest and heard a LDR preamp. I was surprised how smooth, transparent, and natural it sounded compared to a tubed preamp. There is a Serbian company that makes a fully functional remote controlled LDR preamp called Myth. It costs around $1700, and I almost bought it. However, factor in $300 for shipping and cost of shipping both ways if something goes wrong is just too much hassle.

Yes the "Myth" this is a blatant rip-off of my Lightspeed Attenuator design, how can one charge $1700 + $300 shipping for just a bit more glitz and a remote is beyond me. I have been asked many times to do a remote model and I figured it to still be under $1K, some people reel back at my $450 shipped price tag, so it will probably never eventuate.

Cheers George

The Myth product has been around and used to use to be referred to as the Myth Lightspeed preamplifier in it's marketing. George Stantschleff pressured them to stop using the reference to Lightspeed and I can validate, having looked into the product myself, that the Myth is as George says, a remote controlled multi-input Lightspeed.

Anyone really interested in the history and variants on the Lightspeed (including a Nelson Pass design) should muddle through the lengthy thread over at DIY.com. You might even be inspired to build one yourself.