HIVI B4N PDF

DIY Audio Parts India The idea here is to take the heart of the Overnight Sensations big sound, small box, cheap price , but increase power handling and efficiency by adding a second woofer. The results should be quite satisfying and surprising to those who choose to build it. Wiring a second woofer in parallel gives us a few advantages: most importantly, the speaker is 6 dB louder twice as loud , which also means the speaker will go 6 dB louder than its TM counterpart. The impedance of the speaker is now cut in half.

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The -3 dB frequency response of the audio monitors should extend to below 40 Hz. An input voltage of 0. The development methodology for the audio monitors will follow the outline of Studio Speaker and consist of 4 designs: a single driver sealed enclosure; a dual driver MTM sealed enclosure; a single driver bridge sealed enclosure; a single driver ported enclosure.

The tape archive, b4n. The design environment used is gEDA. The power amplifier is based on the LM "chip amp," and contains a DC servo loop to eliminate the output coupling electrolytic capacitors. All designs use common electronics, i. The signal path parametrics can be altered, usually, with only resistor changes on the PC boards-the capacitor values chosen are in the center of the applicable range.

Frequency response: -1 dB 47 Hz. Single B4N Bridged Sealed Studio Speaker The singe B4N bridged sealed design is appropriate for studio monitors where output power is a design requirement; the output power is limited by the speaker driver limitations. Single B4N Ported Studio Speaker The single B4N ported design is appropriate for cost effective, high quality PC work station monitors, albeit with a larger enclosure volume than the sealed designs.

Frequency response: -1 dB 42 Hz. PC Boards The PC boards are dual layer, top and bottom, only, and use a minimum of 20 mil line widths and spacing, common in linear designs, which can be manufactured economically at almost any vendor of choice.

Figure I Figure I is a plot of the sealed enclosure signal conditioning printed circuit board, measuring 6. One is required for each channel, and provides both the high frequency and low frequency crossover paths and signal conditioning. Figure II Figure II is a plot of the ported enclosure signal conditioning printed circuit board, measuring 4. One is required for each channel, and provides both the high frequency and low frequency crossover paths to the speaker drivers.

Schematics The development database for all audio monitors in the suite is in the tape archive, b4n. The development system uses gEDA Electronic Design Automation tools, particularly, Gschem 1 , for schematic capture and Spice electronic circuit simulation netlist extraction.

Ngspice was used for the Spice circuit simulations. RCS was used for version control in the development. There are four designs of audio monitors in the suite, and all share common electronics; the files in each RCS directory under the TLD are linked to common sources, i. The parametric differences between the designs are calculated using Calc - C-style arbitrary precision calculator.

For example: Figure IV Figure IV is a plot of the signal conditioning circuit for all sealed enclosures, the PC board in Figure I was made from this schematic-its actually the second level down in the hierarchy.

Note the absence of component values. The values are calculated by a Calc script, lt. These schematics are used to generate the PC board layout. Note the expediency of changes in parametric values, i. License A license is hereby granted to reproduce this software for personal, non-commercial use. So there.

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