Taperssection.com
Gear / Technical Help => Microphones & Setup => Topic started by: Kindguy on August 13, 2003, 12:58:13 PM
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Picked up a used soundpro batt box with bass rollover.
Anyone have instructions on how to set the bass rollover? 0hz, 107hz ect.
I knew I should have made a copy of my old instructions before selling it.
Someone kick me down the combos please.
Thanks
Jeff
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I have it at home...PM me to remind me with your email and I will shoot it to you tonight.
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thanks Nick T+
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Same here... you did sell it to me, rememba? ;)
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I believe this info is readily available on the SP site.
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Same here... you did sell it to me, rememba? ;)
Yes i do ;) Schwill is using them now right?
Thanks Brian .....As usual you were right. T+ heres the info if anyone else is curious.
Before making your first important recording, it is suggested that you experiment with your new microphones and battery unit a bit. By removing the 4 screws that hold the cover on the battery module, you will access the two switches that select the bass roll-off frequencies. There are 7 different bass roll-off frequencies to choose from: 16Hz, 69Hz, 95Hz, 107Hz, 160Hz, 195Hz and 888Hz. You will find that different recording situations require a different bass roll-off frequency to produce the best results, depending on many factors such as the type of microphone you are using, the venue itself, shape of the room, your position in the room, speaker placement (if any), and many other factors. You should experiment with the different roll-off frequencies to see which one(s) produce the sound that you like the best. To set the roll-off frequency, set the switches according to the following chart:
Your desired Roll-off FrequencyThese switches set to the open position
16Hz (no roll-off) 2,3,4
69Hz 1,4
95Hz 1,3
107Hz 1,3,4
160Hz 1,2
195Hz 1,2,4
888Hz 1,2,3
It is usually desirable to have the left and right switches set to the same frequency; however, they can be set independently if desired. The best way to determine the best setting for a given recording situation is through trial and error, starting off with the 16Hz setting and working up in frequency until the desired amount of bass is achieved in your recording. Remember, setting the switches to higher numbers removes more bass from the recording.
Here are some general guidelines: For louder, bassier situations, try higher settings; for smaller, quieter situations, use lower settings. If the venue has bad acoustics, use higher settings; for venues with better acoustics, use lower settings. If you are using cardioids, use lower settings; for omnidirectional mics, use higher settings (cardioids reduce bass somewhat when compared to omni’s as a function of their more directional pickup pattern). The audible differences between settings are subtle, so you won’t destroy a recording by using the wrong setting. There is no ‘right’ setting…what sounds right to your ears is ‘right’.
Once you have decided upon a setting for the bass roll-off switches, close the battery module. You do not need to reinstall the screws if you do not wish to do so.
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Same here... you did sell it to me, rememba? ;)
Yes i do ;) Schwill is using them now right?
Yep, right-o! And +T for Brian, too, as usual.
Armen
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Yep, right-o! And +T for Brian, too, as usual.
Armen
What can I say - I'm "California laid off". Employed, but nothing for me to do, yet they won't lay me off. Go figure. So I'm enjoying coasting for the time being. Although I'm actually going to have to do some real work next week. lol
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Is that what you Easterners think of us Californians? Ehhh???
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I have a "silly" question about bass roll-off... :P
What about setting and using the bass roll-off filter ONLY when transferring your recording from MD to PC?
When recording a live performance, you have to set the bass roll-off frequency a little "fairly" (assuming you're a novice).
This can result of an irremediable lost of "punch" in the master recording if you did'nt make the best choice.
So, why not just record the show without bass roll-off and apply the filter when transferring the recording from MD to PC?
Will this give the same results?
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I have a "silly" question about bass roll-off... :P
What about setting and using the bass roll-off filter ONLY when transferring your recording from MD to PC?
When recording a live performance, you have to set the bass roll-off frequency a little "fairly" (assuming you're a novice).
This can result of an irremediable lost of "punch" in the master recording if you did'nt make the best choice.
So, why not just record the show without bass roll-off and apply the filter when transferring the recording from MD to PC?
Will this give the same results?
If i understand this correctly, you're wondering whether or not you can apply bass rolloff during transferring a show...you cannot do that. Also, my understanding is that the bass rolloff is inactive when you record via line in, right? If that's the case, bass rolloff is useless for folks taping line in and only for people who record mic in. At least this is what i have gathered from various opinions on ts. Am i right?
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you can use computer software to achieve the same effect, though
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If i understand this correctly, you're wondering whether or not you can apply bass rolloff during transferring a show...you cannot do that. Also, my understanding is that the bass rolloff is inactive when you record via line in, right? If that's the case, bass rolloff is useless for folks taping line in and only for people who record mic in. At least this is what i have gathered from various opinions on ts. Am i right?
The bass roll off is not disabled when going line input. The analog bass rolloff feature of the passive SP battery box will work into *any* downstream device (line or mic in) but the frequencies stated (the -3dB knee of the filter) will be valid for one input resistance only! The one specified is that of a generic mic input (10 kOhms?).
When going line-in (47 kOhms on many Sony consumer units) the filter knees are shiftet drastically downward in frequency. A "100 Hz" high pass suddenly passes everything above 20 Hz .. I.e. barely any bass roll off at all.
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When going line-in the filter works at totally different (5 times or so lower) frequencies.
yes, I already tested that; I think bass roll-off filter sounds 10 times better when using it in the mic-in input of the recorder.
But my MDs mic preamp is so poor that I need to use line-in to record in loud situations... :(
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yes, I already tested that; I think bass roll-off filter sounds 10 times better when using it in the mic-in input of the recorder.
But my MDs mic preamp is so poor that I need to use line-in to record in loud situations... :(
Right. So you open the batterybox and replace the capacitors within with new ones suitable for your application!
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Right. So you open the batterybox and replace the capacitors within with new ones suitable for your application!
That's right. Works like a charm ;)
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If i understand this correctly, you're wondering whether or not you can apply bass rolloff during transferring a show...you cannot do that. Also, my understanding is that the bass rolloff is inactive when you record via line in, right? If that's the case, bass rolloff is useless for folks taping line in and only for people who record mic in. At least this is what i have gathered from various opinions on ts. Am i right?
The bass roll off is not disabled when going line input. The analog bass rolloff feature of the passive SP battery box will work into *any* downstream device (line or mic in) but the frequencies stated (the -3dB knee of the filter) will be valid for one input resistance only! The one specified is that of a generic mic input (10 kOhms?).
When going line-in (47 kOhms on many Sony consumer units) the filter knees are shiftet drastically downward in frequency. A "100 Hz" high pass suddenly passes everything above 20 Hz .. I.e. barely any bass roll off at all.
Excellent, thanks for this quality post +T
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The bass roll off is not disabled when going line input. The analog bass rolloff feature of the passive SP battery box will work into *any* downstream device (line or mic in) but the frequencies stated (the -3dB knee of the filter) will be valid for one input resistance only! The one specified is that of a generic mic input (10 kOhms?).
When going line-in (47 kOhms on many Sony consumer units) the filter knees are shiftet drastically downward in frequency. A "100 Hz" high pass suddenly passes everything above 20 Hz .. I.e. barely any bass roll off at all.
So... the only "valid" roll-off frequency when recording loud concerts at boomy venues using line-in will be 888Hz, right?
Mic-in frequencies :
16Hz (no roll-off) 2,3,4
69Hz 1,4
95Hz 1,3
107Hz 1,3,4
160Hz 1,2
195Hz 1,2,4
888Hz 1,2,3
Line-in frequencies (5 times less) :
(16Hz) > 3,2Hz ;D 2,3,4
(69Hz) > 13,8Hz 1,4
(95Hz) > 19Hz 1,3
(107Hz) > 21,4Hz 1,3,4
(160Hz) > 32Hz 1,2
(195Hz) > 39Hz 1,2,4
(888Hz) > 177,6Hz 1,2,3
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lol, just do phantom
I swear
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The bass roll off is not disabled when going line input. The analog bass rolloff feature of the passive SP battery box will work into *any* downstream device (line or mic in) but the frequencies stated (the -3dB knee of the filter) will be valid for one input resistance only! The one specified is that of a generic mic input (10 kOhms?).
When going line-in (47 kOhms on many Sony consumer units) the filter knees are shiftet drastically downward in frequency. A "100 Hz" high pass suddenly passes everything above 20 Hz .. I.e. barely any bass roll off at all.
So... the only "valid" roll-off frequency when recording loud concerts at boomy venues using line-in will be 888Hz, right?
Mic-in frequencies :
195Hz 1,2,4
888Hz 1,2,3
Line-in frequencies (5 times less) :
(195Hz) > 39Hz 1,2,4
(888Hz) > 177,6Hz 1,2,3
The 39 Hz is too low for anything but very special problems. So yes, you're left with the 177 Hz high-pass.
Pretty severe alright but at 6 dB/octave you are only 6 dB down at 88 Hz. I.e, plenty enough bass on the recording to allow you to EQ it just to your liking in the aftermath.
OBS: If you have the SP batterybox with output level control the frequency will depend on the setting of the level.
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OBS: If you have the SP batterybox with output level control the frequency will depend on the setting of the level.
Thank you all for your answers ;)
I only have the bass roll-off option on my SP battery box.
I'm not able to replace the capacitors on this one, cos' It's the SP-SPSB-6524 model (everything is covered with a kind of "solid" glue).
I think it's not available anymore on the SP website.
So I plan to build my own battery-box with bass roll-of filters that will fit my needs.
Can someone lead me to a DIY website?
Thanks in advance :)
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Never tried any DIY (ahem, of this kind), but try here:
http://groups.yahoo.com/group/MicDIYers/
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Some months back dklein posted an Excel file that allowed you to calculate the size of the capacitor needed to obtain a certain roll off frequency. See if you can obtain a copy.
Others here on taperssection are experimenting with homemade switchable filters and are testing out using various makes of parts. See if you can hook up with them.
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here it is
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http://burak.relyon.ca/live/battbox.html
i want to make a new batery box too, i have d7 now and sp-cmc-8 mics. if anyone know wich parts to use for the bassoff. anyone know the input impedance of a d7?
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http://burak.relyon.ca/live/battbox.html
i want to make a new batery box too, i have d7 now and sp-cmc-8 mics. if anyone know wich parts to use for the bassoff. anyone know the input impedance of a d7?
If you set the d7 line-in to 47 kOhms you're within safe range of the actual value. I need to check with the schematic but I think the actual
value is closer to 50 kOhms. That will not make any practical difference.