Short: Increase audio output of standard amiga Author: cyborg@eanet.de Type: docs/hard Architecture: generic This small piece of hardware will in/decrease your amiga audio output. Or any other audio source. What does it cost? Peanuts! In germany the parts cost app. 2,20 DM = 1,10 Euro or 1$ US You need: 1x TL072CN ( or better , but then the layout has to be changed! ) 2x 1M variable resistors ( small [same size of the TL072CN] ) some small cables you will find a layout inside the archive. WARNING: If anything breaks, don`t ask me, it`s allways your fault! 2.Warning: This is only a SIGNAL-AMP! Not a POWER-AMP! this means, the cuircut should only be used between the normal amiga output and an external HIFI-AMP! What you should NOT do! Do not connect a speaker directly to the device, you can blow up the device and your amiga power supply! It`s a Signal-AMP ! What it does: It (normaly) increases the amiga audio signal. It`s channel independent, you can change the ampvalue with the resistors. If your are nuts, you use this device to decrease the output signal, but that`s really nuts!! How to adjust the volume: The resistors have to be in the middle position. That`s a ampvalue of 1:1, which means , that you won`t get any change to the volume. Dependent of how you connected the resistors you get a louder output in one direction and a less louder output to the other. It`s a none linear loudness change, so don`t wonder if nothing happens if you change it only a bit. How to connect: In a tower it`s easier because most tower-rebuilds have a normal pc-powersupply where you can easyly get your +-12V and 0V. in a normal Amiga you have to connect it internal to the main power connector. You have to be carefull there! If you don`t which pin has which voltage look into the A500! UserGuide. You will find a layout of the connector which HASN`T changed on the A1200. It`s still the same layout. I already had to seperat audio cables in my tower, so i used them from the chinch connectors to the device and plug the device directly to my tower audio-connectors. YOU CAN cut the connection on the mainboard or in the connectors before they go out of the Amiga and "solder the device to the mainboard" But thats not recommend. I would buy a "digitial"-audiocable (it`s noisereduced, don`t ask!, just buy it. costs 100% more, but you need only inches ) and some chinch connector and but it external, so that it could be removed or reused it i.e. your CD-Drive!. Why did I do it? Because the signal level of the amiga was so low that everytime i changed to tape or cd at my tuner i has to change the loudness controll. AND , mostly : If i`ve watched cdiwith the amiga, i had to turn the tuner to max. loudness to hear the silent parts. Now i don`t need it anymore.