"I will let our three IEM models speak for themselves when you get them.
We are very happy with how they measure and sound. But here are a few unique tidbits on each. The Orion uses a CNC machined all-billet enclosure which really makes a difference in creating an exquisitely uncoloured, balanced and natural sound. The Lyra's Beryllium PVD dynamic driver has no crossover. It works inside an all-ceramic enclosure made of ZrO² or zirconium oxide. This is an ultra high-density ceramic from which we build the acoustic chamber to carry excellent detail with lower distortion, more extended HF and natural tonality than conventional materials. Whilst the manufacturing process is more complex and costly, the acoustical benefits are a very real and big payback. The ceramic process itself includes mixing our proprietary formula, granulation, injection moulding, mould release/debinding, sintering and polishing which is followed by assembly and QC. The sintering process applies 1'400°C for 72 hours during which the parts harden and shrink. For the driver, we experimented with many dynamic transducers in titanium, mylar, aluminium etc. None performed like the Beryllium PVD does. At first we actually aimed for a diamond dome via chemical vapour deposit or amorphous diamond-like coating. Alas, applying these processes to a 8-9 micrometre thin PET diaphragm proved impossible. The PET dome would deform from the heat. That led us to Beryllium which works brilliantly.

"For the Jupiter, the Orion recipe of a single balanced armature design scales up to a quad design, with two BA each for mid/bass and treble and one crossover. It really is an elegantly simple solution and not at all about the presently fashionable approach of cramming far too many BA drivers and crossovers into one enclosure. Also, most IEM rely on a tube and acoustic damper that's connected to the sound port of the BA drivers. Ours does something novel. We do not use a conventional tube and acoustic damper like everyone else. On our treble units, we use a rectangular highly tuned chamber with a very specific air volume which vents directly out of the earphone without any acoustic damper screen, PVC or plastic tubes for pure unfiltered more extended HF. Not only does this secure treble quality unattainable from conventional tube/damper systems, it allowed me to run the LF units without a low-pass filter. Absent our unique tweak for the treble units, the balance wouldn't have permitted to let our powerful bass units run open. This combined with some other tricks we learned from our amplifier experiences which here was applied to the crossover components really solidified the Jupiter's unique sound signature.

"Common to all our IEM are custom MMCX parts sourced from a very high-end supplier. Both female and male MMCX parts are gold-plated beryllium copper which was hardened with heat treatments. Standard MMCX parts from inferior brass are far softer. Their connect/disconnect rating is low and eventually their fit gets loose. Ours are ultra hard and rated for thousands of cycles. Finally a note of caution. Because we literally make these by hand, one at a time, I don't foresee having big numbers at least not for the foreseeable future. We already pre-sold everything we have to dealers. Only very little is left to sell direct. I hope people will understand that there will be some wait times involved when ordering our IEM."

With the tracking # email, I also got this: "I included our ALO Audio Continental Dual Mono amplifier. There is a warm-up period of about 3-5 minutes before its tubes get up to speed. I'd hold critical listening until then. Please download the appropriate driver here, scroll down to 'Additional Information' and also read the FAQ. I included a set of Sonotone tubes in case you want to play around with rolling. The amp is new. You might want to plug it in and let it play for a constant 3 days to burn it in a little. Included are each of the 3 IEM we make. Please note that getting a good seal is critical for these to properly work. I need to still make a video on this topic as the fit is so important. After doing a lot of shows, most people do not fit them correctly. The manual in the box has some instructions about this. I recommend the black foam tips without wax guard which are open all the way through. We include a lot of tips in foam and silicon just in case but the black foam tips measure best and fit good."

Production Orion in overlay.

Extreme importance of the perfect seal/fit led to the category of CIEM or custom in-ear monitors in the first place. An audiologist takes precision moulds of your ears, the headphone maker transforms them into matching outer shapes for your IEM pair like a bespoke suit. This means the fee of an audiologist visit; and possibly lengthy order times until your pair of customs are made. The stars of the Campfire lineup bypass all that. They're instant novas. This puts the burden on the end user to pursue the best seal with the provided tips.

When asked about specs like impedance, sensitivity and bandwidth, Ken explained that "I have all that already but if you wait, I just spent $10'000 on a new Soundcheck rig for our lab. I want to remeasure everything for the very best accuracy. I've used our old system for three years. It had great hardware with a Bruel Kjaer microphone and such but the new SoundCheck software suite and all-in-one Listen Inc. ampconnect is supposed to be world class. We are finalizing its setup tomorrow and then will conduct a new round of final measurements."

From the owner's guides included with the delivery, the Lyra was spec'd from 8Hz - 28khz with a 17Ω/1kHz impedance, 110dB sensitivity, -26dB isolation and 11.8g weight without cable. The Orion listed at 14Ω and 113dB, the Jupiter at 35Ω and 114dB. Compared to circumaural headphones between 84 to 96dB, IEM efficiency ratings are far higher. That makes them easy loads for portable players to decommission the need to brick it with a dedicated amp. If you do use one, it'll have to pass muster with the noise microscope which an IEM will hold up to its output stage.