SOLD I am selling my Advanced AcousticWerkes (AAW) W500 Universal IEMs. These are 5-drivers hybrid with 5-way crossover network reference in-ear monitors. These and the W900 are the flagships of AAW. I bought these W500s directly from Null Audio about 5 months ago. My understanding is that the W500s are usually sold as custom in-ear monitors (CIEM). These were the store demos so they were the universal version. Although these are not the AHMorph version the bass quality and quantity is perfect to my ears. Additional technical details can be found on AAW website. https://www.null-audio.com/products/advanced-acousticwerkes-w500-reference-hybrid-custom-in-ear-monitor Here are some comments from a review I found online, https://www.headpie.net/2016/05/advanced-acousticwerkes-w500-review.html The overall sound signature is clean, detailed, spacious with great resolution. The treble is silky and non-fatiguing. The mids are rich and sweet; great for listening to vocals. The bass is the special one. It only reveals itself when the music calls for it. It hits with authority and the sub bass extends deep. These are the most speaker-like IEMs I have ever heard. Since these are the demo units they didn't ship with the regular retail package. Here are what would be included: 1. Six pairs of ear tips (unused) 2. Cleaning cloth and tool 3. Semi-hard shell Null Audio carrying case 4. Brevity S 5N CGOCC-A copper cable 5. I will include a Pelican 1010 protection case. Price: SOLD Shipping to U.S. only. Price includes shipping and Paypal fee. No trades please. Thanks.