He "forgot" to tell me the 535 have 3 sound drives (hence the number5-3-5) while the 425 has only two- meaning it lacks bass... Does anyone share my opinion?
I can't return it... So bummed.
Was waiting for months.
The 425's actually have about 4-5dB more bass than flat. Keep them and see if you get used to them. It can take a while to adjust, but this is how hi-fi sounds. You should notice more detail and less bloat and boom in the bass. Make sure you have a deep and very secure seal. Come back after 30 hours of listening and share your opinion.
Head-fi is divided between two camps. One camp believes in the difference that cables can bring, the other camp believes it is all snake oil.
It is important to note that although the SE535 has three drivers, it is a two-way system (2 drivers for lows, 1 for mids/highs) not a true three-way system (low/mid/high).
Shure IEMs are notorious for a sound signature that is composed of an excellent midrange, somewhat tamed highs, and a weak/less impactful bass.
^What he said. Also :
Lesser number of drivers doesn't always mean less bass :p
If you previously owned a very bassy IEM, then the SE425 might sound lacking in bass. It might take your ears a while to acclimate to SE425's sound; When your ears are used to it, it's likely that you will find the bass of SE425 is okay. Here's a piece of advice a head-fi vet gave me :
"My best advice is this: stick with an earphone. If after several months or weeks of constant listening you still don't like it, it's not for you. If you listen to it and immediately dislike it, that is your fault." - shigzeo