If they're going on the 58x, there's a definite noticeable increase in bass, and likewise a bit softened mids and highs. I actually prefer the sound change as i use them mostly for gaming and movies, and music just on the occasion. I can see avid music listeners not being a huge fan of the sound change as it is quite a bit deeper... almost cinematic in a way. Also, these block out outside noise much more than the stock pads which i hadn't heard anyone else mentioned and was one of the first things i noticed. Overall i'd say it is a slight upgrade to the stock pads, but does change the sound significantly. Hope that helps.
1. I got a pair of HD6XX from the first run - what type pads are on those??
2. I just ordered another pair - what type pads will be on those?
3. What type pads come on the Sennheiser HD650 (which is the equivalent, right).
4. What does fenestrated mean?
5, What foam are the questions about whether the pads come with foam referring to? I want to know how to replace the thin foam that covers the speakers; that will also wear out too.
Stock pads are velour (though kind of cheap quality).
2. Another pair of 6xx's? They're probably velour which is the preferred FR curve for most people.
HD650 come with velour as well but cost double the 6xx so I'm assuming the pads will last longer.
Fenestrated means the sheepskin leather has been punctured several times. This tries to preserve the open sound-staging of the stock 6xx. The normal sheepskin pad is going to enclose the ear fully.
You need the stock foam underneath the earpad to attach your earpads or the adapter will just fall out. You need a NO-FOAM earpad adapter from Modhouse, BUT this is only if you buy from Brainwav or a company that has not bonded the adapter to the earpad itself.
I'm going for the Fenestrated Earpads as I have a velour pad from Brainwaz. Hopefully things work out for you.