Grado Labs Past production Past production

| Headphone_Model | Headphone_Class | Sensitivity_dB | Impedance_Ohms | Driver_matched_dB | Construction | Earpads | Termination | Succeeded_by |
|---|---|---|---|---|---|---|---|---|
| SR40 | Unknown | 100 | 32 | Unknown | Plastic | Foam | 1/8 (3.5 mm) plug with 1/4 adaptor | iGrado |
| SR325 | Prestige | 98 | 32 | 0.05 | Aluminum Alloy | Bowls | 1/4 (6.5 mm) plug | SR325i |
| HP1000 | Joseph Grado Signature | Unknown | 40 | Unknown | Aluminum Alloy | Flats | 1/4 (6.5 mm) plug | No Successor |
| SR100 | Prestige | Unknown | 32 | Unknown | Plastic | Flats | 1/4 (6.5 mm) plug | SR125 |
| SR200 | Prestige | Unknown | 32 | Unknown | Plastic | Flats | 1/4 (6.5 mm) plug | SR225 |
| SR300 | Prestige | Unknown | 32 | Unknown | Plastic | Flats | 1/4 (6.5 mm) plug | SR325 |