The Dutch magazine Audio & Techniek once published an article about one-way loudspeakers that were based on Audax units 1. Although speakers using just a single full-range unit per audio channel were disregarded in audiophile circles (high intermodulation distortion), they could also have important advantages (excellent imaging). The editors of Audio & Techniek were enthusiastic about the Audax sound; they claimed that the single driver flaws were minor and the advantages were huge. We never heard so much soundstage for so little money” was their comment. Audiophile convictions are subject to fashion like every other human opinion.
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In the 1960s, speaker builders considered full-range drivers from Philips (9710M, 9710AM) a best buy”. Such speakers were efficient and could be used with valve amplifiers. In the 1970s, bextrene woofers, soft dome tweeters and complex filters became popular. Because of the low efficiency and heavy load of such speakers, powerful solid-state amplifiers were required to drive them. But history tends to repeat itself. In the 1990s, valve amplifiers and full-range speakers reappeared. The published frequency response is exceptionally smooth (100 Hz to 18 kHz within 3 dB) and free of major dips (see above). The price was only 30 Euros (for a single unit, 60 Dutch guilders in 1995).
Based on the Boxcalc simulation, I built two speaker cabinets from MDF. Outside dimensions: height 400 x width 180 x depth 312 mm, wall thickness 18 mm, reflex port on the back (diameter 50 mm, length 150 mm, equal distances to cabinet sides, center of port 115 mm from cabinet bottom), drive unit on the front (equal distances to cabinet sides, center of cone 120 mm from top of baffle). One reinforcing lath (50 mm wide, 18 mm thick), running from front to back at the center of the front and back panels, to stiffen the cabinet. Enclosure stuffed with polyester wadding, amount as specified by the manufacturer (Monacor). I used only wood glue, no screws.
Parameters of the SPH-60X are shown in the right column of the following table: free air...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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