'bass blocker' to protect FR driver?

60ndown · 02:32 PM

if 'audiofools' might have access to the volume dial, is it 'sacrilegious' to instal something to protect a FR driver from too much low frequency signal/and or volume and risk coloring / affecting the whole sound ?

or can i solder something (cap/resistor/iductor?) on the +ve lead to protect the driver?

what value/s?

richie00boy · 2nd May 2011, 02:55 PM

You would put a capacitor in series, but it's not really an audiophile solution unless you run it a fair bit below resonance. Then it's not going to do a lot anyway, so swings and roundabouts...

purplepeople · 2nd May 2011, 03:50 PM

How about an inductor in parallel?

:)ensen.

chris661 · 2nd May 2011, 05:20 PM

Quote:

Originally Posted by purplepeople

How about an inductor in parallel?

ensen.

No!

A decent inductor will have a DC resistance of less than 1ohm.
Putting that across an amplifier will cook most. It'll be very quiet through the speaker so you'll turn it up and then the smoke comes out.
Not good.

Use a PLLXO.

60ndown · 2nd May 2011, 06:17 PM

i love the www, i learn so much and save so much time and equipment.

thank you

purplepeople · 2nd May 2011, 07:05 PM

Oops. I traded brevity for clarity and made the suggestion to avoid issues with capacitors in series.

What I was thinking something like an inverse BSC circuit. Normally the driver in series with an inductor and resistor that are paralleled with each other. Instead the inductor and resistor in series then paralleled with the driver.

:)ensen.

richie00boy · 2nd May 2011, 09:35 PM

Same effect as Chris said just not as severe. Makes little to no difference to sound coming from the speaker as it's just a parallel element.

Uncle Meat · 3rd May 2011, 10:42 AM

How about a fuse?

derwhalfisch · 3rd May 2011, 11:37 AM

put a line-level passive high pass in front of your amp, it'll cost you from $3

norman bates · 3rd May 2011, 12:35 PM

they still make f-mods?

I remember seeing that they roll at 6db even though they advertise 12db.

Norman

2nd May 2011, 02:30 PM	#1
60ndown diyAudio Member Join Date: Apr 2011	'bass blocker' to protect FR driver? if 'audiofools' might have access to the volume dial, is it 'sacrilegious' to instal something to protect a FR driver from too much low frequency signal/and or volume and risk coloring / affecting the whole sound ? or can i solder something (cap/resistor/iductor?) on the +ve lead to protect the driver? what value/s? Last edited by 60ndown; 2nd May 2011 at 02:32 PM.

2nd May 2011, 02:55 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	You would put a capacitor in series, but it's not really an audiophile solution unless you run it a fair bit below resonance. Then it's not going to do a lot anyway, so swings and roundabouts... __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

2nd May 2011, 03:50 PM	#3
purplepeople diyAudio Member Join Date: Mar 2003 Location: London, Ontario, Canada	How about an inductor in parallel? :)ensen. __________________ Those who claim to be making history are often the same ones repeating it.

2nd May 2011, 07:05 PM	#6
purplepeople diyAudio Member Join Date: Mar 2003 Location: London, Ontario, Canada	Oops. I traded brevity for clarity and made the suggestion to avoid issues with capacitors in series. What I was thinking something like an inverse BSC circuit. Normally the driver in series with an inductor and resistor that are paralleled with each other. Instead the inductor and resistor in series then paralleled with the driver. :)ensen. __________________ Those who claim to be making history are often the same ones repeating it.

2nd May 2011, 09:35 PM	#7
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Same effect as Chris said just not as severe. Makes little to no difference to sound coming from the speaker as it's just a parallel element. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more


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2nd May 2011, 06:17 PM	#5
60ndown diyAudio Member Join Date: Apr 2011	i love the www, i learn so much and save so much time and equipment. thank you

3rd May 2011, 10:42 AM	#8
Uncle Meat diyAudio Member Join Date: Mar 2010 Location: Rhön (Germany)	How about a fuse?

3rd May 2011, 11:37 AM	#9
derwhalfisch diyAudio Member Join Date: Aug 2008	put a line-level passive high pass in front of your amp, it'll cost you from $3

3rd May 2011, 12:35 PM	#10
norman bates diyAudio Member Join Date: Nov 2003 Location: iowa	they still make f-mods? I remember seeing that they roll at 6db even though they advertise 12db. Norman

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