15/05/2026
Compact enclosure, smart design choices to get the max result from a small enclosure. 🔊⚡
We really like the thinking behind this DSP bookshelf speaker build, build by a customer of ours, who pushed the boundaries of DIY Audio. Everything about the project feels carefully considered to get the maximum performance out of a compact enclosure.
Each speaker uses Dayton Audio TCP115-4 midwoofers and Dayton Audio ND28F-6 tweeters. 2x side-mounted passive radiators per speaker and a Sure/Wondom JAB4 amp. board with ADAU1701 DSP. A setup focused on flexibility, controlled tuning, and efficient use of cabinet space.
Certainly also due to the TCP115 woofer, with an Fs of 55 Hz and Qts of 0.45, the TCP is the ideal woofer to combine with passives in a small enclosure, to extend low-end response. The passive radiators help extend the low-end performance without needing large ports, while DSP control gives precise adjustment over the entire system response.
What makes this build especially interesting is the fully active approach. Instead of using a traditional passive crossover, the system relies on DSP for crossover integration, EQ, level matching, and future expandability with an adjustable subwoofer output for a potential 2.1 setup.
Components used in this build:
• Dayton Audio TCP115-4 Midwoofers | 16.95 eur each
• Dayton Audio ND28F-6 Tweeters | 17.45 eur each
• Wondom/Sure Electronics JAB4 amp board | 64.95 eur each
Together, these components create a compact speaker system focused on controlled bass performance, DSP flexibility, and detailed sound from a small enclosure.
Awesome work , again thanks for sharing! 🙌
Would you choose a passive crossover or a fully DSP-controlled active setup? 👀👇 Let us know in the comments!