I am sure I will get used to the sound. When I got my UE-11's I thought they sounded somewhat lifeless and flat compared to the Westone 3's I got a month prior but now I can't listen to any other IEM's but my UE-11's.
The Radio Shack SPL meter was the one I was looking at. I was researching how to measure the SPL of headphones and I saw some guy on here put cardboard over the headphones and put a hole in the middle for the SPL meter. How do you take your readings?
I have the new HD650 because I just bought them new and see the white inside them. I was looking at after market cables but I can't ever see paying $400-600 on a cable. If you recommend a specific one, let me know, send me a link or something and I will check it out. I would have to demo one somewhere to see if it makes a real improvement. I'll reserve bass judgment till I get more hours on the 650's.
I'd suggest you give your ears time to adjust first. You may just be used to exaggerated bass and may find yourself hearing other things as bloated instead after some time with the HD650 (like what jasonb has experienced and what I've found myself as well).
Fwiw, I prefer a warmer presentation so I choose to colour the sound towards this spectrum by employing the Moon hdam in my dac. The copper cable balances the resulting congestion through the refinement it brings so what I'm left with is great synergy for my taste. Again, I DON'T ADVOCATE SPENDING BIG BUCKS if you want to see what a cable may do for you. If you want to go down this path make sure you are mostly happy with your existing chain to begin with (as funds may be better spent addressing those deficiencies first).
The cable I got was custom made by a prominent Head-Fi DIYer. I think it sounds great and for a small fraction of the cost of boutique cables. I'm not going to disclose who made it though, as I was unhappy with other aspects of the transaction.
Before spending any money on aftermarket cables to address a specific perceived deficiency in only one area of the HD650s ability to suit your own personal musical tastes (i.e., an enjoyment of good bass reproduction, which means different things to different people), I would take a look at this no-cost tutorial first:
I don't know whether people realize it or not, but fancy cables, tube or op-amp "rolling" (which includes substituting various A-gd HDAMs) are all just various ways to equalize in different ways the signal that is ultimately presented to your ears. But they all cost something in terms of additional equipment or components. Playing with equalization via free software, as the tutorial explains, might easily satisfy whatever dissatisfaction you have with the HD650's low end, but do it in a deliberate, scientific fashion aimed specifically at measuring and correcting (to your tastes) the lower frequencies. Doesn't cost a penny, and it makes more sense, IMHO, than the semi-random substitution of active components like tubes or op-amps or cables (which aren't even active components) to achieve a specific "sonic signature" (an expression of audiophile jargon that I have never really cared for, but what the heck, I'm running out of synonyms for various things at this point in this post).
FWIW - I love my HD650s low, mid and high-frequency response without any software EQ or other significant tweaks. Good amplification is a necessity, but the all-tube headphone output of my inexpensive Maverick Audio A1 integrated amplifier does a great job driving the 650s to my ears, although I've never been able to personally compare it to any other headphone amplifier in the remote region of the world where I reside.
Well I had a chance to demo the Moon Audio Silver Dragon V2 for the HD650. Well, I was wrong thinking cables couldn't make much a difference. Wow, the HD650's sound perfect to me now. I can listen to them longer without being burnt out so quickly and they sound just a whole lot more exciting and lively. I also got a silver dragon for my UE-11's. Not as big of a difference as the HD650's. However, I just got these cables today and Drew recommends burning in for 100 hours for best sound. Can't wait to hear how they sound.