Why would you need to replace an acoustic shelf?
If the sound quality of the speakers initially satisfied you, then the need to make an acoustic shelf with your own hands may arise for the following reasons:
- damage to the stock part;
- decision to increase the number of speakers;
- to improve sound quality;
- wear of a previously installed element.
Drivers often encounter breakage of shelf fasteners, which occurs while driving on a rough road. Most often, this malfunction is encountered by drivers who do not slow down in front of potholes or on rural rough roads.
However, the vast majority of VAZ-2115 owners replace the acoustic shelf in order to improve the sound quality of music inside the car.
In this case, the shelf should be made of plywood with your own hands or to order. This material will help make the speakers sound clearer.
VAZ-2115: Installing the Audio Art RW12 subwoofer in the rear parcel shelf
Photo report on increasing the strength of a store “acoustic” shelf designed for VAZ-21099 / VAZ-2115 cars, manufacturing a “closed box” with a volume of about 30 liters combined with it, which is a subwoofer housing, installing an Audio Art RW12 dynamic head with an Oris WG- protective grille 012 and, finally, mounting the finished structure in my VAZ-2115 car. The photo report contains 34 photographs, instructions for the dynamic head, as well as a description of the manufacturing and installation process of the subwoofer.
A store-bought “acoustic” shelf made of 8 mm thick plywood, cleared of carpet, sanded and reinforced with a 16 mm thick chipboard board. The drawer parts are made of a tabletop 26 mm thick, respectively, the thickness of the wall intended for installing the dynamic head is 50 mm. The box is assembled using 3.5×51 mm self-tapping screws. They are also used to attach the box to the shelf and fix the dynamic head. In addition, all joints of chipboard and plywood parts are glued with Titebond “liquid nails” in red packaging. The lower part of the shelf and the interior of the drawer are covered with Body 950 anti-gravel. The drawer and shelf are covered with carpet, glued with 88-HT glue and additionally secured with staples in places of strong tension. The dynamic head diffuser is protected by an Oris WG-012 grille. Its Oris WG-001 clamps are installed through shaped spacers made of 10 mm thick plywood, covered with carpet. The finished structure is attached to the body using two strips of 2.5 mm thick steel at the front and four corners of the same steel at the rear. To protect against corrosion, the fasteners are coated with ABRO primer. To connect the speaker cable, a Mystery MTN-30 terminal is installed on the subwoofer wall. From the very beginning of using the subwoofer, it became noticeable that a box with a volume of 30 liters is too large, and the 28 liters recommended by the driver manufacturer is indeed the optimal value, providing the best balance between return and accuracy (as the volume decreases, the return decreases, and as the volume increases, hum appears). To adjust the volume, a piece of foam plastic 50 mm thick was added to the box. The subwoofer is powered by an Audio System Twister F2-300 amplifier connected by a bridge. The amplifier's filters are turned off. The low-pass filter LPF of the corresponding channels of the Pioneer DEH-P88RS head unit has a cutoff frequency of 50 Hz and a slope of -18 dB/oct. and NOR phase.
Be sure to note that installing a 12-inch subwoofer in the rear parcel shelf of a VAZ-21099 / VAZ-2115, described in this photo report, is possible only after replacing the trunk lid torsion bars with shock absorbers.
Written later: Due to the sale of the car, the box became unnecessary. One fine day, a regular on the Bluesmobile forum wanted to buy it. It all happened exactly like this: I didn’t advertise, but he saw the photo and wrote to me. Naturally, I agreed. The “masterpiece of carpentry art” was placed in the trunk of a brand new Mazda 6, belonging to an acquaintance of the new owner, and “left” for Saratov. I got some free space in the cellar, and the new owner got a good quality subwoofer box for the VAZ-21099/VAZ-2115. Everyone was happy
