Lowther PM7A Drive Unit
| DC Resistance of Voice Coil | Re | 7.4 ohms |
| Free Air Resonance | Fo | 45 Hz |
| Emission Piston Area | Sd | 0.021M² |
| Equivalent Volume Suspension | Vas | 55.907 Ltrs |
| Suspension Compliance | Cms | 892.762u M/N |
| Mass of Cone | Mmd | 11.0 g |
| Mass of Moving Parts | Mms | 12.75 g |
| Force Factor | Bl | 9.106 T-M |
| Mechanical Q Factor | Qms | 4.338 |
| Electrical Q Factor | Qes | 0.328 |
| Total Q Factor | Qts | 0.305 |
| Voice Coil Inductance @ 1 kHz | Le | 103.671 uH |
| Reference Efficiency | No | 1.729% |
| Sound Pressure Level | SPL | 94.397 Db |

Điện trở Duelund CAST Silver/Graphite - 33R / 10W
VCAP CuTF 0.01uF / 600V
Mundorf Supreme Silver Gold Oil 0.1uf / 1000V
Tụ Jantzen Cross cap 18uf / 400V
Tụ Jantzen Alumen Z-Cap 3.3uf / 100VDC
RCA chassis Cardas GRFA -S
Cardas Audio CG - MXLR
Tụ Jantzen Superior Z-Cap 0.1uf /800V
Mundorf MLytic HV 100uf/ 500V - Axial
Cardas Audio CG - FXLR
Tụ Jupiter COPPER FOIL / Paper 0.022uf / 600V
Tụ Jantzen Silver Z-Cap 1.5uf / 800VDC
Cardas Audio S-DIN
Cardas Adaptor FRCA - FXLR
RCA chassis Cardas CTFA
Trở AMTRANS AMRG - 2W (chân vàng) - 2K
Chì hàn Jantzen 4% bạc - mét
Tụ Jantzen Amber Z-Cap copper C&B 0.022uF 630V
Treb SEAS H1318-06 29TFF/W 


