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[Magnet]

Anybody know anything about modifying an API 325 line amp to a API 312 mic pre? How to do it and approx. how much will each channel cost to mod?

Thank you

magnet

[Bo Hansén]

Hi Magnet,

I have some information about the API 312 and 325 amp cards for a other modification, but you can compare the schematics and se the different between the 312 and 325 cards on this link:

http://w1.316.telia.com/~u31617586/

--Bo

[Geoff_T]

Bo Hans Geoff Tanner http://www.auroraaudio.net/main.shtml http://www.grandmasterrecorders.com     http://www.amazon.com/gp/reader/0595093329/ref=sib_dp_pt/104 -6861899-0350336#reader-link NB Please do not pm me if you want a fast response... please email me. Bo Hansén Jr. Member Offline Posts: 70 Re: API 325 line amp to mic pre mod? Hi Geoff, This R,C,D circuit from XLR pin 1 to the DI-box electronic ground and case are a alternative for a ground lift switch. The circuit eliminate ground loops between the Di-box, monitor/back line guitar amp and the mixing console, the combination of this R,C,D components fill the demand for satisfactory function in ground loop disturbance as hum and buzz, negative phantom power feed and also give a safety ground that can blow a fuse if there are some mains voltage fault somewhere in the chain. --Bo   Bo Hansén Hansén Audio Gothenburg, Sweden http://www.hansenaudio.se Print Pages: [1]   Go Up « previous next » R/E/P Community > R/E/P > R/E/P Archives > Bruno Putzeys (Designer) - Dave Hecht (Master Tech) > API 325 line amp to mic pre mod?   SMF 2.0.19 | SMF © 2021, Simple Machines | Terms and Policies XHTML RSS WAP2 Site Hosted By Ashdown Technologies, Inc. Page created in 0.11 seconds with 19 queries.

[Bo Hansén]

Hi Geoff,

This R,C,D circuit from XLR pin 1 to the DI-box electronic ground and case are a alternative for a ground lift switch.
The circuit eliminate ground loops between the Di-box, monitor/back line guitar amp and the mixing console, the combination of this R,C,D components fill the demand for satisfactory function in ground loop disturbance as hum and buzz, negative phantom power feed and also give a safety ground that can blow a fuse if there are some mains voltage fault somewhere in the chain.

--Bo