From the design to the board
Stage values
The same board is built for 2, 4, 8 and 16 Ω speakers. Every value scales with the load, so every model keeps the same ratios and the same voicing.
Ideal values
For the four switched stages and the coil.
Ideal values, 3 significant figures, before fitting to standard parts.
| Part | 2 Ω | 4 Ω | 8 Ω | 16 Ω |
|---|---|---|---|---|
| 14 dB Rs | 3.60 Ω | 7.20 Ω | 14.4 Ω | 28.8 Ω |
| 14 dB Rp | 1.12 Ω | 2.24 Ω | 4.49 Ω | 8.97 Ω |
| 7 dB Rs | 2.49 Ω | 4.98 Ω | 9.96 Ω | 19.9 Ω |
| 7 dB Rp | 3.63 Ω | 7.27 Ω | 14.5 Ω | 29.1 Ω |
| 3½ dB Rs | 1.49 Ω | 2.98 Ω | 5.97 Ω | 11.9 Ω |
| 3½ dB Rp | 9.07 Ω | 18.1 Ω | 36.3 Ω | 72.5 Ω |
| 1¾ dB Rs | 0.821 Ω | 1.64 Ω | 3.28 Ω | 6.57 Ω |
| 1¾ dB Rp | 20.2 Ω | 40.3 Ω | 80.6 Ω | 161 Ω |
| L1 (coil) | 0.225 mH | 0.450 mH | 0.900 mH | 1.80 mH |