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21st September 2002, 04:26 PM
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#1 |
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diyAudio Member
Join Date: May 2002
Location: Rome - Italy
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Blue BOSOZ
This is a first of a series of pics of a BOSOZ. As You see, power supply is in a distinct box.
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21st September 2002, 04:27 PM
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#2 |
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diyAudio Member
Join Date: May 2002
Location: Rome - Italy
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Internally the power supply is divided in two areas. This one show the regulators side.
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21st September 2002, 04:28 PM
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#3 |
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diyAudio Member
Join Date: Jun 2002
Location: Italy
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E' stupendo!
ciao 
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21st September 2002, 04:40 PM
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#4 |
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diyAudio Member
Join Date: May 2002
Location: Rome - Italy
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...this is the underside. A 3mm panel divides the two areas.
The small circuit on the upper right is a small soft-start (or inrush protection). Another thread gives more details and a link. Amplifier and speaker protection circuits The power supply is dual-mono, each one using two ransformers, two diode bridges for each channel; this arrangement is detailed in the original BOSOZ article by NP. Total cap bank for both channels is slightly over 22.000uf. |
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21st September 2002, 04:43 PM
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#5 |
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diyAudio Member
Join Date: May 2002
Location: Rome - Italy
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Connection between power and preamp is through a 6 pins
byonet connector, a very costly item by itself. |
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21st September 2002, 04:52 PM
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#6 |
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diyAudio Member
Join Date: May 2002
Location: Rome - Italy
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This is the preamp front, from left to right: input selector, volume,
recording selector, output selector. The output selector lets the signal out either on balanced connectors, unbalanced, and (also unbalanced) to three serie of RCA, for high-mid-bass multiamplification. Inside there is a daughter bord (see later) that can host a passive crossover. The chassis of the preamp (and the power supply too) is a sandwich of 3mm aluminium and 6mm plexiglass. The underside of the plexiglass is blu-violet metallized paint. I liked the contrast of the mahogany sides and blue. |
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21st September 2002, 04:54 PM
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#7 |
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diyAudio Member
Join Date: May 2002
Location: Rome - Italy
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The back. From left to right: power supply input, unbal out, bal out, high-mid-bass unbal out, rec in-out, unbal in, bal in.
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21st September 2002, 04:57 PM
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#8 |
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diyAudio Member
Join Date: May 2002
Location: Rome - Italy
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The inside... pretty crowded. The crssover daughter board is on the right side.
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21st September 2002, 05:02 PM
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#10 |
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diyAudio Member
Join Date: May 2002
Location: Rome - Italy
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And a detail of it. The pins connects to passive crossover boards you build aside and then plug in. Depending of what you put on them (components height) you may stack two of them. If you need just a 2way crossover, simply don't use those pins.
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