Welcome to VCLLabs, specialized in the design of loudspeaker systems. Extensive studies on loudspeaker design and simulation have been done and much knowledge and experience in the domain has been built up. We can help the DIY audio hobbyist making his speaker. For the loudspeaker manufacturer we can offer some high quality services to realize a complete new loudspeaker, making reference designs, writing application notes and other tasks on demand.

Speaker System and Crossover Filter Design

Using the transducer datasheets and the cabinet dimensions, a complete speaker design with analog or digital crossover filter can be designed. Very useful to make a first good working prototype. Also the measured frequency responses of the transducers placed in the cabinet can be used for the design. For such demand, contact us at info@vcllabs.com.

VCL Design Kits for new speaker designs on demand.

September 2020 VCL SDK00, an example of a VCL Design Kit

VCL EX-15, 3-way speaker with 2 x Purifi woofer, 4 x Purifi passive radiator, Accuton midrange and Bliesma Be tweeter

VCL EX-14, 2-way monitor with Purifi midwoofer and 2 x Purifi passive radiator; Scanspeak Be tweeter

VCL DI-215, 4-way speaker with Acoustic Elegance dipole subwoofer, Seas woofer, Yamaha midrange and Viawave tweeter

Main Competences

  • Speaker system design and simulation
  • System calculations for closed box, basreflex, passive radiator, transmission line,... and others.
    The main simulation tool is Leap. Simulation models for the transducer and the cabinet are created. The transducers models are placed in the cabinet model and the frequency responses are simulated. For a first concept study, the models can be created using the transducer data sheets and the cabinet mechanical dimensions. No need to build a cabinet and to do acoustical measurements immediately. Very accurate response simulations at low frequencies, responses that are difficult to measure. Out of Leap the frd files of the frequency and impedance response of each transducer in the used cabinet can be obtained.

  • Crossover design
  • Once the frequency and the impedance responses of the transducers in the cabinet are available, a crossover filter can be designed. The filter type and order is chosen; Linkwitz Riley, Butterworth, elliptical filtering and others. An analog or digital filter is possible. For digital filtering we have experience with the miniDSP and Hypex platforms.
    The filter schematic of the analog filter or the filter coefficients of the digital version can be created.

  • Driver measurements
  • The data sheet specification of the transducers is checked with frequency and impedance response measurements on IEC baffle. Using these measurements for the transducer models, results in very accurate simulations of the cabinet responses. Almost no need anymore for acoustical measurements of the transducers in the cabinet, just doing it as a check.