A couple of months ago, I decided to take some SPL measurements with JL Audio's SPL Meter (an iPhone app) and a lapel mic, sandwiched between the ear pads of first the LCD-2 and then the T1, as I played various Bink Audio Test files between 20 Hz and 100 Hz.
Using Bink Audio Test Files (44/16 WAV) > Foobar with WASAPI > USB > CEntrance DACport LX > Burson Soloist > LCD-2 rev.1 and the T1
Here are the results:
Observation: When the T1 and LCD-2 are matched to
85.7 dB playing white noise,
T1 SPL is less than half that of the LCD-2 between 55 Hz and 85 Hz (a loss of more than 3 dB). Bass energy is slightly greater than the LCD-2 rev.1, below 44 Hz, but as much as 4.6 dB less than the LCD-2 above 44 Hz.
Observation: When the T1 and LCD-2 are matched to
91.7 dB playing white noise,
T1 SPL is less than half that of the LCD-2 between 50 Hz and 90 Hz (a loss of more than 3 dB) across a greater range of frequencies than when volumes are matched to 85.7 dB. Bass energy is slightly greater than the LCD-2 rev.1, below 42 Hz, but as much as 5.3 dB less than the LCD-2 above 42 Hz.
A not-very-scientific conclusion: The higher the overall volume, the greater the bass roll-off of the T1 relative to the LCD-2, above 44 Hz. This irony is insidious, because as I turn up the volume to improve the T1's bass energy above 42 Hz, the efficacy of doing so diminishes relative to the LCD-2 at the same volume.
At either 85.7 dB or 91.7 dB, the LCD-2 rev.1, is literally more than twice as loud between 55 Hz and 85 Hz.
Another irony, though not quantifiable, is my hunch that the LCD-2's relative lack of speed and control in the bass region actually contributes to a greater sense of bass energy than can actually be measured. I'm conjecturing that the less detailed bass of the LCD-2, relative to the very tight T1 bass, makes the LCD-2 sound as if it has even
more bass energy than it does.
There's one last irony: I find it almost humorous that the T1 offers higher SPL levels at the very bottom of the bass range - below 45 Hz. I suspect that anyone making quick comparisons with 20 Hz or 25 Hz test files, as I had done on the first day I pulled the T1 out of the box, will would find the T1 offering slightly MORE bass energy than the LCD-2! But look at the charts - the bass of the T1 exceeds the LCD-2 only where very little content resides - below 45 Hz!
I can
hear the differences shown in these charts. The human ear can easily tell a difference in volume of 3 to 5 dB, even if we're just talking about a small portion of the spectrum.
Hint: I love using the T1 with music that doesn't have lot of bass content, but that's just my opinion, with my tastes, my gear, my ears.
Mike