CA 9100 Pre-amp

[F.O.Bean]

I got 75 hours with my 9100 w just a regular energizer alkaline battery

[Marshall7]

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?

[Church-Audio]

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

[Marshall7]

Thanks for the explanation, Chris

[F.O.Bean]

I got 75 hours with my 9100 w just a regular energizer alkaline battery

Gain on the 9100 was set between 10-11o'clock

[fmaderjr]

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.