C-Planar, compressed Planar wavefront waveguide

Phase Plug

The Compressed Planar Waveguide using the GRS PT2522C-4 Planar Tweeter with Back Cup or any OEM equivalent comming to the same factory as GR Neo 3, i designed to compress and guide the produced wavefront,.

The compression, similar to the one of a compression driver, add a loading behavior with more SPL in low allowing a lower distortion, greater maximum SPL and smoother low end response.

The waveguide exhibits true 90*60° constant directivity, free from midrange narrowing and beaming, providing a precise soundstage and immersive environment.

To order, see horn versions and prices, then contact us to proceed to payment and worldwide shipment.

Specifications:
    Mounting Information:
    • Method: Baffle mounted using M4 screws
    • Rebate: 10 mm wide × 8 mm deep
    • Corners: 4 mm radius
    Measurement:
      Recommended Mid-woofer:

        SPL

        The loading effect provides much greater sensitivity in the low end compared to direct radiation in the low end.

        SPL without EQ or crossover:

        SPL

        Distortion

        Its loading capacity allows operation at very low frequencies. The radiation restriction, combined with the reactive loading effect, reduces the tweeter’s required excursion to achieve a given SPL after equalization to a flat response, leading to lower distortion.

        Intermodulation distortion (IMD) is also reduced, since both harmonic and intermodulation distortions are strongly linked to driver nonlinearities, which generally increase with diaphragm excursion.

        SPL

        Material and Finish

        The waveguide is 3D-printed using PLA for indoor applications or PETG-HF (price on demand) for outdoor use.

        It arrives raw unless you order the spray putty service. Layers of spray putty must be applied before primer for a smooth finish, as described in our dedicated article: How to Finish my Horn.

        Roundover Kit

        PureShape rear
        To reduce midrange narrowing and beaming, and to achieve the best directivity performance from your Pure Shape waveguide, we recommend using the roundover kit (equivalent to a 25 mm radius roundover) for users who are unable to machine the required roundover with their own tools or resources.

        It can be bonded directly to your baffle, with the waveguide glued in place and finished flush inside. In this configuration, a rear access opening must be provided to allow installation of the tweeter.