Quantity   Component name
2 × 4" fullrange: TB W4-1320SIF Mid/low frequencies
2 × Tweeter: Dayton ND20FB-4 High frequencies
2 × Wool filling (for 5L) Reducing enclosure resonances
1 × Solder To solder the cabling and internal crossover
2 × 4.7UF capacitor, 100V bipolar Highpass filter
1 × 5MM sealing tape, 2 meter For making the speakers airtight
4 × 1OHM resistor Highpass filter
1 × 2 meter 1.5MM speaker cable 99% OFC Internal cabling
2 × Speaker terminal ST-925 Mounting post for speaker cable
2 × 4" passive radiator (see update 3 for which one) For better bass response
2 × 80g weights (can be inductors, max diameter: 18mm) For passive radiator
36 × countersunk screws (3.5mm x 30mm, philips head) Mounting