mcnach Posted June 22, 2013 Share Posted June 22, 2013 [quote name='molan' timestamp='1371738265' post='2117570'] I fitted one of these to an Alleva Coppolo recently but I'm really struggling to tame the low end in active mode. I know the bass is boost only but even turned all the way off there seems to be too much bass for me [/quote] ? eh? They are cut and boost. Are you sure you are turning the right knob? Quote Link to comment Share on other sites More sharing options...
molan Posted June 22, 2013 Share Posted June 22, 2013 [quote name='mcnach' timestamp='1371893302' post='2119173'] ? eh? They are cut and boost. Are you sure you are turning the right knob? [/quote] Treble and mids are boost and cut but bass is boost only (+15db at 50hz). There's a built-in contour when you switch in the active circuit but I'm not sure exactly what it's doing. Quote Link to comment Share on other sites More sharing options...
John-E-Retro Posted June 22, 2013 Share Posted June 22, 2013 [quote name='molan' timestamp='1371895262' post='2119221'] Treble and mids are boost and cut but bass is boost only (+15db at 50hz). There's a built-in contour when you switch in the active circuit but I'm not sure exactly what it's doing. [/quote] (A J-Retro for sure, as already pointed out) The pre-shape contour is a very gently aprrox. 3dBs at the low and high end. It's probably the pre-shape that's not working for the Alleva bass. We do supply units with or without the pre-shape now BTW. Nothing under the bonnet that can be adjusted apart from the pickup gains, a screwdriver adjustment for each pickup. The pickups toggle by the vol/blend stack is there to allow pickup selection in passive mode - bridge or both pickups. In active it gives active blend or passive mix of both. Quote Link to comment Share on other sites More sharing options...
mcnach Posted June 22, 2013 Share Posted June 22, 2013 [quote name='molan' timestamp='1371895262' post='2119221'] Treble and mids are boost and cut but bass is boost only (+15db at 50hz). [/quote] oh, so it is!!! I only used a J-Retro for two years! I should have known. Mine is currently waiting to be installed on my CIJ Jazz, so I have not used it in a while. I never noticed it was boost only on the bass. Quote Link to comment Share on other sites More sharing options...
mcnach Posted June 22, 2013 Share Posted June 22, 2013 [quote name='John-E-Retro' timestamp='1371908202' post='2119433'] The pre-shape contour is a very gently aprrox. 3dBs at the low and high end. It's probably the pre-shape that's not working for the Alleva bass. We do supply units with or without the pre-shape now BTW. [/quote] That's good to know! I have to say I love the J-Retro, but that "colouration" I was not a big fan of. Quote Link to comment Share on other sites More sharing options...
molan Posted June 22, 2013 Share Posted June 22, 2013 [quote name='mcnach' timestamp='1371931318' post='2119825'] oh, so it is!!! I only used a J-Retro for two years! I should have known. Mine is currently waiting to be installed on my CIJ Jazz, so I have not used it in a while. I never noticed it was boost only on the bass. [/quote] I've had two previous basses with J-Retro's in and didn't realise the bass was boost only either, lol. Because it has a centre position marker I just assumed it was boost and cut. Always thought it was odd that I kept needing to cut bass frequencies, lol. Quote Link to comment Share on other sites More sharing options...
iamtheelvy Posted October 9, 2013 Share Posted October 9, 2013 I'm curious about getting one of these at some point, as I seem to be playing my Jazz mostly DI'd at the moment. Are there any decent alternatives worth looking into? Also, anyone got a picture of how far the knobs stick out in comparison to a standard Jazz? Quote Link to comment Share on other sites More sharing options...
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