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Old 29th July 2003, 03:52 PM   #1
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Default Jeff Rowland Model 1 adjustment

Hi all,

I've got the JDG Model 1 Power amp. The default setting of the gain is 26dB. I found that it possible change the gain with the switch or something under the Modules. But I dont have the service manual or guide to tell me how can change it correctly! I would like to ask for the help to someone have the info or experience of that....! Thanks!

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Old 29th July 2003, 08:24 PM   #2
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Are you able to open it and take high resolution close-ups? We always appreciate it and someone may well offer advice.
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Old 21st July 2014, 08:58 PM   #3
Sandor is offline Sandor  Italy
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I have removed the driver module of my Jeff Rowland Model 1 from the main board. As described in the user manual, the back of that module shows some sockets meant for jumpers (see attached picture).
Unfortunately I don't know how to place those jumpers to set the gain at 20, 26, 29.5 or 32 dB (the values indicated in the user manual).
Can anybody help me?
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