Audio Discussion > Tweaks
Sunfire True Sub - Help Fixing Auto On
OldiesButGoodies:
Actually, after auditioning this sub in PR I would buy this before the Fathom (in terms of value it is a better deal):
http://www.hsuresearch.com/products/vtf-15h.html
And a tip for slowing down walking sunfire subs: plop a stack of granite samples on top with blue tack in between layers, make him do heavy squats if he wants to walk.
I am pondering separating the plate amp from the box and putting it in an external chassis, away from the jumping bean. Would need to have a blank plate machined in 1/8 stainless steel, would probably be expensive and only make a minimal difference, but it does sound like a fun project.
I am waiting for Anders et al to share their take on how to tame auto on. I am thinking an infrared detector that senses when I am in the room and turns it on a set minimum time using a 555 circuit or better yet, until I tell it to revert to off. That or Anders could tell me what magic condenser or resistor or rheostat or peaking coil controls the sensitivity. That is what a brother would do.
;D
Reverend:
--- Quote from: OldiesButGoodies on September 27, 2012, 09:16:30 PM ---And a tip for slowing down walking sunfire subs: plop a stack of granite samples on top with blue tack in between layers, make him do heavy squats if he wants to walk.
--- End quote ---
F that. Go to Dick's and pickup a pack of hockey pucks. Problem solved.
Anders:
Maybe the flux capacitor isn't fluxing properly :laugh:
MacGeek:
Why not by pass the auto on , hard wire the sub to always be on (or install an on/off switch) and plug it into a current sensing outlet. Or, some pre-amps have switched rear panel outlets.
OldiesButGoodies:
Macgeek, that is a brilliant suggestion.
But I did find this piece of info in the interwebs:
--- Quote ---...the auto on-off time is set by a single resistor-capacitor combination. R40 and C18. These are 5.2 megohms and 22uF. You will find these at the bottom-left corner of the quad jfet opamp U2 (MC34004). The 22uF cap looks to be a higher quality that all the other electrolytics.
--- End quote ---
Time to open that baby up again!
:P :P :P :P :P
PS: On a related note, I may drop by ater to pick up a 22uf cap. Love ya!
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