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Active Monitor Speakers power supply PCB [01112221]
The power supply PCB for the Active Crossover Amplifier used by the Active Monitor Speakers.
Double-sided PCB with plated through holes, solder mask and silkscreen overlay.
147 x 60mm.
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4-way Loudspeaker Protector PCB [01101222]
The PCB for the 4-channel version of the Multi-Channel Speaker Protector.
Double-sided PCB with plated through holes, solder mask and silkscreen overlay.
91 x 66.5mm.
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The Hummingbird Audio Amplifier PCB [01111211]
The PCB for the small Hummingbird audio amplifier.
Double-sided PCB with plated through holes, solder mask and silkscreen overlay.
63.5 x 87.5mm.
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Two- or Three-Way Stereo Active Crossover PCB [01109211]
The PCB for the 2- or 3-Way Stereo Actrive Crossover.
Double-sided PCB with plated through holes, green solder mask and silkscreen overlay.
176 x 117.5mm.
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Active Monitor Speakers power supply PCB pattern (PDF download) [01112221]
A PDF with the power supply PCB pattern for the Active Crossover Amplifier.
Both layers are in a single PDF.
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Multi-Channel Speaker Protector PCB patterns (PDF download) [01101221-2]
A PDF with both PCB designs for the Multi-Channel Speaker Protector (both double-sided).
The 6-channel version is coded 01101221 while the 4-channel version is coded 01101222
Both layers of both designs are in a single PDF.
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The Hummingbird Audio Amplifier PCB pattern (PDF download) [01111211]
A PDF with the PCB design for the small Hummingbird audio amplifier (double-sided).
Both layers are in a single PDF.
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Two- or Three-Way Active Crossover PCB patterns (PDF download) [01109211]
A PDF with the PCB design for the 2- or 3-Way Active Crossover (double-sided).
Both layers of both boards are in a single PDF.
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Active Monitor Speakers cutting and assembly diagrams
A five-page PDF that includes Figs.10-15 from the Active Monitor Speakers article.
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Active Crossover Amplifier drilling and wiring diagrams
A set of diagrams that show how to prepare the case for the Active Crossover Amplifier (used in the Active Monitor Speakers project) and wire up the modules.
The three-page PDF has the case base drilling diagram on the first page at 50% scale, the case front/rear panel diagrams on the second page also at 50% scale and the heatsink drilling diagrams on the third page at 75% scale.
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Hard-to-get parts for the Hummingbird Amplifier
A small set of parts for the Hummingbird Amplifier which constructors might find difficult to obtain otherwise.
The set includes two driver transistors (MJE15034G & MJE15035G), a VAS transistor (KSC3503DS), a 220pF 250V C0G ceramic capacitor and two 0.22Ω 5W resistors of the type specified in the parts list.
The PCB is available for purchase separately on our website. The remainder of the components can be obtained from a retailer like Jaycar, including the MJL21193 & MJL21194 power transistors.
Keep in mind that Altronics have a complete kit for this module (Cat K5158).
Note: photo shows fully assembled module, including parts not included in this set.
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