8 wire changes it but not by much. The main area of improvement is in the detail, bass impact, and slightly (barely) deeper and wider stage. The treble could benefit but it depends on the wire used. I noticed silver plated stuff doesn’t sound good on the Utopia since it’s treble already has a slight metallic etch to it when compared to other Beryllium drivers like ZMF Verite which is more natural/neutral in the treble. Silver will sound more detailed in the treble than silver plated copper and without the harshness but that really depends on your setup. Another upgrade that makes the sound stage even wider and deep would be an 8-wire internal wire change, but it breaks warranty. It however provides more of an improvement in the sound stage than using 8-wire headphone cable. Both methods combined offers an even greater sound stage expansion.
What I recommend is to use OCC Silver (if money suffice) in addition to 8-wire for all the benefits, and if there is any metallic etch in the treble, to use a tube amplifier or solid state that takes the edge off without sacrificing detail. Tube amplifiers like DNA Stellaris. Solid state amplifiers like ECP DSHA3F (Ravenswood) which are custom made to have the same output impedance as the Focal’s and apparently according to Eddie Current, it is one of the his top 3 headphone amplifiers (that says quite a lot), especially when used with Focal headphones.
FOCAL CLEANING METHOD
For those who wants to learn how to clean their focal’s headphones properly, what I do is use some super soft toilet paper like Charmin Ultra Soft and fold 4-5 sheets together and into a square. From there I dip it in some distilled water (stay away from chloride and other harmful material in tap water that can break down lamb skin), squeeze it dry, and gently wipe the ear-pads and head-pad.
Make sure hands are clean. Wait for the water film to air dry. Take a microfiber cloth and cut into little 2” squares. Apply some pea sized leather conditioner drops (in this case the Audeze one) onto the cloth and spread evenly with fingertip. Glide cloth over the surface of the lambskin while gently pushing down lightly as you go. This helps get the conditioner into the crevices of the leather. Let it air dry for 10-15 minutes and repeat the process for the second coat. If only two coats were used then it should dry without residue left over. If there are some, gently pat it off with another microfiber cloth. Clean areas where the leather conditioner wasn’t suppose to touch with a cotton swab or ultra soft toilet paper.
This cleaning/rejuvenating method is to help keep the leather hydrated, preventing it from drying out and cracking which can have a direct influence on the sound frequency. The leather conditioning formula penetrates the leather without making it oily or sticky. The combination of ingredients (lanolin, neatsfoot oil, coconut oil, aloe vera, Brazilian carnauba wax, and beeswax) protects the lambskin from getting broken down. It adds a layer to not only take care of the lambskin leather, but to also repel our skin’s acidic oil and pH imbalance as well as protecting it from oxidation. This is why I apply two coats.
Audeze sources their products from HowardProducts so instead of getting a small bottle, you can get four times the amount for the same price. And for those who hasn’t cleaned their headphones in awhile and require more than just water to take the existing oils off that is currently breaking down your leather, use the their leather cleaner provided in the link below.
I have no association with them other than using their products.
https://www.howardproducts.com/product/leather-cleaner/
https://www.howardproducts.com/product/leather-conditioner/