Crossover network

Crossover design is a culmination of model, measure, listen, remodel, remeasure, re-listen, all while refining performance in increasingly small steps. This is the single most time consuming task in loudspeaker design, as it is the glue without which, even the best components can be made to sound disjointed and poor.

As with the overall design goals for all Arendal Sound products, the crossover must be up to the task to deliver on the promise of hi-fidelity and robust construction, without compromise. All models within the Arendal Sound family share common drive units and this applies equally to the treble to mid-bass crossover designs across the range. The Tower gains an extra low pass section for the additional bottom bass drivers.

Whilst all the attention and praise is shone on driver selection and design, the crossover plays the most critical role in delivering a smooth, seamless transitioning of the mid-woofer to the tweeter. Special attention must be paid to magnitude, phase and polar response so that the transition is contiguous on and off axis.

Components used are tight tolerance, audio grades, and where no suitable item was found,  components were custom made for Arendal Sound. Selection was further refined through destructive testing with 24 hour cycles of pink noise, played at progressively higher levels, without a break, over a period of days. If it could break, we found out why, how soon and rejected it anyway.

For the Monitor and Center the crossover is a 2-way design, with a crossover point of 1500Hz and 1400Hz for Surround, between the mid-woofer(s) and tweeter. Slopes are all 4th order (24dB/octave) which serves to further protect the tweeter at high SPLs, submerge out of band cone resonance in the mid bass drivers to inconsequential levels and limit out of band interactions between the drivers.

The tower design starts as a 2-way design very similar to the Monitors, using the upper two woofer with the tweeter. This ensures consistent voicing throughout the family. What sets the tower apart is the addition of the lower two woofers. These operate in tandem in below 120Hz with the upper mid/bass drivers to further extend low frequency capabilities and increase headroom across the entire frequency range.

To summarize, all Arendal Sound crossovers have the same characteristics:

    1. 24dB/octave slopes.
    2. Heavy guage, low DCR air core coils.
    3. Metalized Polypropylene capacitors.
    4. High power, low inductance wire wound resistors.
    5. Wide, 1oz copper traces on 1.6mm thick FR4 pcb’s.
    6. Low inductance, low insertion loss, twisted pair wiring.
1723 Series Comparison Subwoofers
Finish
Woofer 13.8"
13.8"
2 x 13.8" 2 x 13.8"
Enclosure High Density Fiberboard (HDF)
High Density Fiberboard (HDF)
High Density Fiberboard (HDF) High Density Fiberboard (HDF)
Amplifier Avalanche 500DSP - 500W RMS
Avalanche 500DSP - 500W RMS
Avalanche 1000DSP - 1000W RMS
Avalanche 1000DSP - 1000W RMS
Design Sealed
Sealed / vented
Sealed Sealed / vented
Size
49.2H x 33.5W x 45D cm
63.7H x 45W x 55D cm 54.2H x 42W x 50D cm 71.2H x 50W x 60.9D cm
Weight 24.5 kg 48.1 kg 41.4 kg 60.1 kg