Broughton HPF LPF question

J.Wolf

J.Wolf

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Apr 29, 2003
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Contributor- Bass Musician Magazine | Marketing Manager- Trickfish Amplification
#1
I'm interested in getting one of these for a couple reasons. I have and like using an HPF to tame the boom in a lot of rooms/rigs, and I have recently discovered that I like using a LPF to help me dial out some of the crispy treble, while keeping the upper midrange fullness that I like for fingerstyle playing and soloing.

Question is: is the HPF as effective as my Fdeck V3? AND, does the LPF work in the way I mentioned? Can i use it to shelve out some of the string noise-y, hissy, clanky sound that is not readily tame-able with most traditional treble controls? How steep is the curve on the shelf?

thanks for any input.
 
#2
I am also very interested in these details about the Broughton HPF/LPF. I love my F-deck series 1, but I'm looking for the same taming of top end that you are. Thanks for the post, hopefully we can get details soon.
 
#4
J.Wolf said:
I'm interested in getting one of these for a couple reasons. I have and like using an HPF to tame the boom in a lot of rooms/rigs, and I have recently discovered that I like using a LPF to help me dial out some of the crispy treble, while keeping the upper midrange fullness that I like for fingerstyle playing and soloing.

Question is: is the HPF as effective as my Fdeck V3? AND, does the LPF work in the way I mentioned? Can i use it to shelve out some of the string noise-y, hissy, clanky sound that is not readily tame-able with most traditional treble controls? How steep is the curve on the shelf?

thanks for any input.
Click to expand...
The HPF and LPF are both 12 dB per octave butterworth response filters. I use the LPF in the way that you describe: to filter out ultra high frequencies (string noise, fret buzz) but still keep the lower treble/upper mid frequencies.
 
#8
I tried an 800+ it was pretty nice, but I went another route. Didnt realize the treble control on it was a shelf.

I'll probably get it out of a pedal if I can, as Im pretty happy with my amp and rig at this point
 
#9
mmbongo said:
Both Subway amps have an adjustable shelving treble control. The treble knob does not boost/cut a single frequency like other amps, it adjusts the 'knee' of the treble cutoff frequency.

That being said, @agedhorse please check my work to make sure I'm not saying something stupid :)
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I'm interested in Andy's reply on this, I read the manual for my D800 and think I would have remembered such an unusual HF control arrangement. My recollection is that it's a straight forward shelving circuit.
 
#10
cavemanbass said:
I'm interested in Andy's reply on this, I read the manual for my D800 and think I would have remembered such an unusual HF control arrangement. My recollection is that it's a straight forward shelving circuit.
Click to expand...

Yeah me too, because I'm sure I'm wrong in how I think the shelving circuit works. I don't think the frequency changes like I said it did, I think it's fixed at 4khz. But since it's a shelving filter, it boosts/cuts everything above 4khz, not just 4khz like a normal EQ. Is that how you understand it?
 
#11
A HF shelving filter will boost or cut all frequencies above the cutoff, in a gradual way depending on the amount of boost / cut applied. With a corner frequency at 4k you're also cutting / boosting a bit down lower (maybe down to 2k). So any boost or cut will be audible in your bass tone, which is of course what the control is designed for.

I'm just beginning to appreciate the beauty of a LPF (thanks TB!), being able to dial out spitty / clacky / noisy HF stuff while not affecting my bass tone. Since getting my HPF / LPF I find that I use the LPF more then EQ!
 
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