Quote:
Get out Audacity.
Play 60hz, then 50hz, then 40hz, then 30hz. Stop there. Play the tones for a good 2~5 seconds or even 10 seconds. Analyze the sound. Absorb it.
Do the same with another headphone. One that is less capable with sub-bass. One that is equal or better with sub-bass.
Re-turn your ears.
Make sure your source is the same on each though.
Very best,
Alright, I'm trying to do a roughly volume-matched test of the HTF600 against the FA-011, but I'm running into some problems.
One thing has become very apparent: My problem yesterday was that I got a channel imbalance again, and it seems to affect the bass frequencies the worst. The problem was in the left driver, so I blew, blew, and blew...and it still didn't work, but it did once I knocked on the housing. Then I volume-matched, and in the middle of the test, the right driver went wonky. It didn't go out so much as start sputtering, but I got it to work with a good knock. I started over, and...the left one went out again. I blew some more, and it didn't pop until I put it on my head. (CRAP! The right one is out again. ARGH. ...okay, I fixed it by cranking up the volume on a 60Hz tone. It popped.)
So, it's time to do a test again (volume-matched again with working drivers, lol). Regardless of the final results, one thing is clear: The sub-bass on the HTF600's can be very good...when the drivers are working right. Odds are, my initial HTF600 impressions were marred by some level of channel imbalance. No matter how many times I test with mono tones and fix the issue, it seems to keep popping up as soon as I let my guard down.
Anyway, I've just done a sighted comparison of my HTF600 and FA-011 (blind would be basically impossible). I volume-matched a 1kHz tone VERY roughly by ear: At 79% computer volume, I can set my O2's volume knob due west for the HTF600 and northwest for the FA-011, and the volume is just about equal. I picked 79% because it allowed for this memorable mapping...which is important, since I have to move the knob back and forth every time I switch headphones. The margin of error here is pretty high, especially considering minute movements of the knob will significantly affect the volume on the HTF600. In hindsight, I probably should have used a lower digital volume and used more of the analog knob. (I also could have kept the analog knob constant and volume-matched based on digital controls, but I can't move them quickly enough to do a good comparison.) An accurate test would probably require volume matching with an SPL meter using some kind of switch-box...but this will do for now.
I switched back and forth at least half a dozen times for each test. Here is what I heard:
60Hz: The FA-011 and HTF600 are actually pretty equal here. I originally gave a slight edge to the FA-011, but I retried this after finishing the 30Hz comparison, and the HTF600 may have had the edge. The difference may be due to subtle changes in how I set the knobs at the beginning versus the end.
50Hz: Pretty equal here. I kept going back and forth thinking the headphones I was currently listening to were louder...and I kept changing my mind when I heard the others.
40Hz: My opinion was split here: I think the HTF600 has a slight edge in volume, but the FA-011's seemed to be vibrating my head a bit more. It could be my imagination, because the differences are still very subtle.
30Hz: Going back and forth, I felt the FA-011 was equal at best, and I commonly gave an edge to the HTF600. I think the HTF600 wins this one by a bit. ("A bit" means "at least 3 dB," given how insensitive we are to volume changes at such a low frequency. I wouldn't be surprised if "a bit" means a lot more in decibel terms either, even up to 10dB.)
Ultimately, my personal conclusion is that the FA-011 is no slouch for sub-bass quantity, but the HTF600 at it's full potential has at least as much sub-bass on the whole and a bit more at 30Hz. I should also note that the way I volume-matched probably gave an advantage to the FA-011: I volume-matched based on a 1kHz tone (upper mids), but the FA-011's highs are emphasized, whereas the HTF600's are recessed. If you prefer to set your volume for music based on the volume of the highs instead of the upper mids, you'll definitely end up getting more bass from the HTF600's at ordinary listening levels. I imagine this volume-matching difference can easily be the difference between, "The HTF600 has at least as much sub-bass on the whole and more at 30Hz," and, "The HTF600 has WAY more sub-bass."
I'm now actually impressed by the HTF600's bass output when the headphones are performing at their best, but I'm disappointed that it's so hard to coax the drivers to behave. I tried cranking up the volume for a 30Hz tone, and the right driver started sputtering...so I had to fix it AGAIN. Then, the left one went out, then the right one again, and it was a few minutes before I got working drivers again. I still can't get 30Hz tones to go very loud without the drivers going wonky again, either. For stress-free listening, I'll be reaching for the FA-011...