Our mission
We strive to supply South Africa with excelent quality audio products at great prices.
Through this we want to become known as the place to go when it is time for your first, second or upgrade audio system.
What we do.
Using software and sofisticated measring equipment, we determine the correct port length and size and enclosure sizes, to achieve a given responce for any midbass and subwoofer driver, we build speakers for car or home systems that are designed specificaly to suit that speaker, extracting the required responce from it.
How we do it.
Our end products are farfield and nearfield tested with a MiniDSP Umik 1 calibrated microphone as well as impedence sweep measurments taken to ensure that we hit the correct frequency responce and port uning in the case of vented designs.
For drivers with unknown TS parameters, we use a device that can retrieve this information through a set of tests where the end result shows the entire list of critical parameters vital for correct enclosure design.
The process.
The owner of Venico Acousics, Nico Venter, builds every speaker that is sold by hand. No labour that is charged was done by machines.
The first 2 steps are done when we have the speaker on site. If not, we assume that the factory figures are accurate. This is typical to a commisioned build.
1) The speaker driver run in at its RF for 30 minutes.
2) It then gets measured to confirm factory TS parameters are acurate. If no TS parameters are provided, this is the step where we use the tools at our disposal to calculate them.
3) The enclosure design starts based on the application and reqired response. This includes a 3D sketch to ensure that the sub will not make contact with the port tube.
4) A cutlist is set and cut. The port is now cut from PVC if it is a vented enclosure. The baffels are cut and prepared.
5) The panels get glued together and left for the glue to dry. The port is installed in the enclosure.
6) Once the glue is dry, the edges are finised, the port opening gets flared and the MDF gets a treatment of wood sealer. The inner joints of the enclosure gets a layer of silicone sealant.
7) A layer of damping material is now added for vented enclosures.
8) The enclosure is now covered. For cars, it will be acoustic mat and/or vinyl.
For home it will be either covered with laminate or painted.
The paint process is 3 coats of primer and finished with 3 more coats of colour. Finaly they get polished if a shine is required.
9) The speakers and where required, crossovers are installed.
10) A set of tests are conducted to ensure the speaker meets the design spesifications.
All subwoofers recieve a double front baffle.
Enclosures are lined with damping in the case of vented enclosures.
Sealed enclosures are stuffed with stuffing material.
What does the Impedence sweep tell us in completed designs?
This image shows the Impedance sweep done on an Infinity Kappa 1000 completed build.
All speaker drivers have an Impedence rating. This one was set up in a 2 Ohm configuration.
As the driver moves, the impedence changes. The first Impedence peak at 18Hz is where the driver is moving heavily at subsonic frequency.
However at the RF of the port , the speaker driver barely moves and the result is that the impedance returns to the normal level at the port RF. In this case, 28Hz. The second peak at 58Hz is the RF of the speaker driver when fitted to the enclosure.
We use this measurment to confirm that we hit the correct port tuning frequency as designed.
