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Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: taperjeff on October 04, 2012, 02:46:48 PM
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Jut curious, I open my CA 9100 Prea-mp to peak inside. Purchased the unit a year ago used and the previous owner doesn't know what it means.My unit has a switch inside set to off. There is some other writing HPF and V44. My hunch is that this unit may have been used with a R44. Would I want to switch "on" for any reason? ???
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HPF = high pass filter
V44 = version 4.4
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thank you for clarifying. ;D
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Makes sense now :P ;D
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thank you for clarifying. ;D
Of course that still leaves the question - do you ever want to turn it on or not? ;D
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More importantly, the 9100 is not an "ugly box" but a "9100 Preamp." The Ugly Preamp doesn't have a HPF nor can be (easily) disassembled. Just sayin'. ;)
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you are correct adrianf, it is the preamp that I opened.
To answer the question Marshall7, I would leave it turned off. I can run a high pass filter in post production and can leave the screw driver at home.
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you are correct adrianf, it is the preamp that I opened.
To answer the question Marshall7, I would leave it turned off. I can run a high pass filter in post production and can leave the screw driver at home.
Thats how I ran it too :)
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I'm so pleased I stumbled across this thread today.
I'm planning on running my CA11's through the box and wondered that the settings were, I'm assuming that the HPF is bass roll off? I've used the box before and the results were horrible, one minute the recording was fine then the next it went tinny.
If someone could just confirm my suspicions
David
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I've used the box before and the results were horrible, one minute the recording was fine then the next it went tinny.
If someone could just confirm my suspicions
David
I suspect the output cable became partially unseated from the recorder or preamp (more likely at the recorder). It is doubtful the HPF switch moved during recording. Did it also go from stereo to mono when it went from "fine" to "tinny"?
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No, I assumed the HPF was set to off so I was recording with bass roll off, I'm assuming that was kicking in which caused the issue?
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I'm so pleased I stumbled across this thread today.
I'm planning on running my CA11's through the box and wondered that the settings were, I'm assuming that the HPF is bass roll off? I've used the box before and the results were horrible, one minute the recording was fine then the next it went tinny.
If someone could just confirm my suspicions
David
Sounds like a bad connection somewhere or a bad battery.
Chris
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I'm running battery tests with a single energizer max 9volt, and I'm at 75 hrs right now, recording the tv. Levels are still high and not weakening at all. If I can get 80-95 hours I will be amazed ;) :)
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No, I assumed the HPF was set to off so I was recording with bass roll off, I'm assuming that was kicking in which caused the issue?
Seems unlikley a "high pass filter" and a "bass roll off" are the same thing. :)
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No, I assumed the HPF was set to off so I was recording with bass roll off, I'm assuming that was kicking in which caused the issue?
Seems unlikley a "high pass filter" and a "bass roll off" are the same thing. :)
HPF and Bass Roll Off are 100% the same thing
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I got 75 hours with my 9100 w just a regular energizer alkaline battery
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No, I assumed the HPF was set to off so I was recording with bass roll off, I'm assuming that was kicking in which caused the issue?
Seems unlikley a "high pass filter" and a "bass roll off" are the same thing. :)
HPF and Bass Roll Off are 100% the same thing
Why isn't it caleld a low pass filter then? ::)
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No, I assumed the HPF was set to off so I was recording with bass roll off, I'm assuming that was kicking in which caused the issue?
Seems unlikley a "high pass filter" and a "bass roll off" are the same thing. :)
HPF and Bass Roll Off are 100% the same thing
Why isn't it caleld a low pass filter then? ::)
Low pass filter allows lows to pass but not highs. High pass filter allows highs to pass but not lows.
Chris
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Thanks for the explanation, Chris
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I got 75 hours with my 9100 w just a regular energizer alkaline battery
Gain on the 9100 was set between 10-11o'clock :)
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I got 75 hours with my 9100 w just a regular energizer alkaline battery
Gain on the 9100 was set between 10-11o'clock :)
11:00 is approximate unity gain setting on the CA-9100. You're not amplifying at the setting you used.
75 hours is way more than Chris says you should get. Perhaps the battery would not last as long if the CA-9100 was providing a good bit of amplification? I think Chris said a good battery would last for 30 hours or so (or maybe it was 40 hours).
Personally, I prefer to use a 9.6 volt rechargeable so I don't need to worry about when to replace the battery.