the death of the ear bud headphone end when Sony take over Aiwa and cancel the `` Aiwa HP-V600 Headphones with Acoustic Plus Technology and 2-Way Code Holder '' the bass be unreal ; while be complement by the high end sound . I have try all the Sony 's and they can not even compare to this sound ! the price be unbelievably moderate , consider the sound you be get . these should be re-marketed , as I be still look to buy a 3rd pair !! to quote spinaltap -lrb- the movie -rrb- `` these go to eleven !! UPDATE : -lrb- the present 2012 -rrb- where Sony and the like , miss the point be it be not the size of the silicone ear pad that matter , it be the size of the actual speaker . today they be make so small they get lose in the ear canal , and find the bass frequency be nearly impossible , without jingle they to death . the holder , go straight into you ear canal , and from the get go these `` rock '' with a basic frequency response of -lrb- 5hz-25hz -rrb- these make my $ 10.00 walkman sound like a portable Home Entertainment System . the bass and treble be just there , Larger speaker , not at a curve like bose , but straight dead on in the ear , it work . essentially after reappear briefly in 2006 , Sony buy out Aiwa and take they off the market , and put something out with almost the same frequency specification , but no way to find they with in you ear , as the speaker be so small , that the giant silicone pad be totally worthless . second best to the Aiwa HP-V600 Headphones with Acoustic Plus Technology and 2-Way Code Holder be its sister brand call the : Aiwa HP-V161 Headphones with Acoustic Plus Technology -lrb- Metallic Silver -rrb- . almost the same frequency specification , just a larger ear piece fit , but spectacular sound as well . if I know in 2002 , what I know now I would have 100 pair of the `` Aiwa HP-V600 Headphones with Acoustic Plus Technology and 2-Way Code Holder '' if I could find they today I would almost do the same . what have I replace these with ? after careful research , and pricing ... ... ... ... ... nothing . I listen to music at home now only where it can be hear properly , as larger headphone , be a complexly different story . they be still fantastic ; but that be another review see here in another section .