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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Front acoustics: podiums. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Speakers

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It is known that not a single serious installation is complete without podiums for the front midbass. And practically in any model of the car. Therefore, I did not have a question "to do - not to do", but it only remained to decide on the design.

A few words about building the system.

Ahead, I planned to apply a three-component scheme:
midbass 16 cm - on the podiums in the doors
midrange 13 cm - in regular places (high panel)
tweeters - on the front pillars.

On the orientation of the midbass. According to the correct installation angles of the speakers, you need to select for a long time and hard, experimentally. But I was not going to make a prize installation, but I intended to "steer" the scene in the future with the help of midrange and tweeters, which is quite acceptable. Therefore, the shape and angle of inclination were chosen by eye.

Technology Choice

I didn’t like the idea of ​​covering the plywood frame with a knitted T-shirt, just spraying macroflex on the skin is also not an option, so I chose an intermediate scheme: macroflex is sprayed onto a power wooden frame and glued with fiberglass.

Basic materials

  • Plywood 8 mm, approximately 0,8 sq.m., scraps of hardboard and thick cardboard.
  • Fiberglass 0,25 mm thick, bought in an aircraft modeling store, about 2 sq.m. I also bought fabric 0,06 and carbon tape, but somehow they were not useful to me ...
  • Epoxy glue EDP, I used a package of 150 gr., Very convenient - I diluted the entire bottle at once. Consumption was 6-7 packs. Production Voronezh
  • Polyester putty with fiberglass "BODY", one jar of 250 gr, cost about 100 rubles.
  • Skin, rubber holder for skins (sold in all construction markets, very convenient!), Cutter, PVA glue, plasticine, Macroflex (one bottle is enough), self-tapping screws, small carnations.

    Carcass fabrication

    I started with a fitting: after two paper layouts, it became quite clear that there could be only one acceptable shape for the lower part. Therefore, I cut out the bottom of the podium, the ring for the speaker and the side struts from 8 mm plywood. By the way, I note that I cut out all the details at once in duplicate - it’s much easier to customize them, and when grinding it’s easier to keep right angles.
    I assembled the power structure using PVA and 20mm studs. She's pretty solid on her own...

    In the foreground, you can see a cutout for the protruding part of the standard pocket.

    Front acoustics: podiums. Ready for pasting

    Now about the door pocket. I immediately abandoned the idea of ​​making it again from plywood - the standard plastic one is quite good. Therefore, I unscrewed it from the skin and filed it in such a way that it fit exactly to the base of the podium.

    Front acoustics: podiums. Ready for pasting

    Author: Dmitry Tsypchenko; Publication: avtozvuk.com

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