grado labs 

Statements about this table:
the headphone model that be succeed by igrado feature plastic construction and have foam earpads
sr300 be the headphone model that be succeed by sr325
the headphone with a plastic construction and a prestige headphone class be model sr100 , sr200 , and sr300
the headphone with aluminum alloy construction and sensitivity (db) of 100 be headphone model sr200
headphone model
headphone class
sensitivity (db)
impedance (ohms)
driver - matched db
sr40
unknown
100
32
unknown
sr325
prestige
98
32
0.05
hp1000
joseph grado signature
unknown
40
unknown
sr100
prestige
unknown
32
unknown
sr200
prestige
unknown
32
unknown
sr300
prestige
unknown
32
unknown
headphone model
construction
earpads
termination
succeeded by
sr40
plastic
foam
1 / 8 (3.5 mm) plug with 1 / 4 adaptor
igrado
sr325
aluminum alloy
bowls
1 / 4 (6.5 mm) plug
sr325i
hp1000
aluminum alloy
flats
1 / 4 (6.5 mm) plug
no successor
sr100
plastic
flats
1 / 4 (6.5 mm) plug
sr125
sr200
plastic
flats
1 / 4 (6.5 mm) plug
sr225
sr300
plastic
flats
1 / 4 (6.5 mm) plug
sr325