The real villain, however, was hiding inside the crossover network board. Elias heated up his soldering iron. He popped off the old electrolytic capacitors. Over twenty years, the electrolyte had dried out, causing the capacitance value to drift.
While rare, the electrolytic capacitors in the crossover dry out, raising the impedance. This shifts the crossover point, sending bass frequencies to the tweeter (killing it) or treble to the woofer (making it sound harsh). cerwin vega at40 specs fix
| Position | Original Value (Electrolytic) | Corrected Value (Poly) | Purpose | | :--- | :--- | :--- | :--- | | C1 (Tweeter HP) | 4.7 µF | 4.7 µF + 0.1 µF bypass | Restore 3.5 kHz slope | | C2 (Woofer LP) | 12 µF | 12 µF (5%) | Reduce woofer breakup | | L1 | 0.8 mH | Keep original air core | OK if DCR < 0.5Ω | | R1 (L-pad) | 8Ω / 25W wirewound | Replace if corroded | Clean or bypass | The real villain, however, was hiding inside the