* 560uf/6.3v OS-CON as output caps
* drivers changed to Grado SR80 drivers.
* 1.5 gram of Acousta-stuf per cup as stuffing.
The sound signature is somewhere between L-3-770 and L-3-PX, in about everything (bass quantity, bass quality, vocal smoothness, detail retrieval, clarity, etc). I like the sound, more engaging than the L-3-770, and cleaner than L-3-PX.