3 way crossover help please

60ndown · 6th August 2011, 04:26 PM

my latest project is a *high fidelity* bass guitar speaker, something i can play at home that will have hopefully much better tone then your average bass guitar amp/speaker combo.

weather its right or wrong in theory i want to use a 3 way cross over.

i purchased and received this recently,

INFINITY REFERENCE 60 3 WAY PASSIVE CROSSOVERS 4ohm NEW - eBay (item 390293772393 end time Aug-28-11 16:23:48 PDT)

it has 2 separate outputs for the woofer (as the speakers it is designed for used 2 x woofers) i failed to notice this before purchasing

my question is,

can i use just 1 woofer output or can i somehow use both outputs connected to 1 woofer, and what would that do to x over point and slope and ohms that the amp would see etc???

id like to be able to use 200 watts on the woofer section (which is what the 3 way x over is rated at)

any help/advice appreciated.......

Michael Bean · 6th August 2011, 04:45 PM

Well...using a passive crossover with drivers it wasn't designed for won't work as expected, rolloff slopes and driver levels probably won't be right. Since that crossover is rated for 4 ohms, they are most likely using two 8 ohm woofers in parallel, so I'm guessing if you hook up one 4 ohm woofer it will "work". Having said that, if you allready have everything, no problem trying it to see how it sounds.

Mike

CharlieLaub · 6th August 2011, 04:47 PM

A passive crossover is designed to be used only with a specific set of drivers. An active crossover can be used with any drivers.

I suggest you look in to and buy the latter type and some amps, or learn how to build a proper passive crossover (not easy).

-Charlie

60ndown · 6th August 2011, 05:04 PM

Quote:

Originally Posted by Michael Bean

Well...using a passive crossover with drivers it wasn't designed for won't work as expected, rolloff slopes and driver levels probably won't be right. Since that crossover is rated for 4 ohms, they are most likely using two 8 ohm woofers in parallel, so I'm guessing if you hook up one 4 ohm woofer it will "work". Having said that, if you allready have everything, no problem trying it to see how it sounds.

Mike

thank you,

do you mean connect both the 8ohm outputs to 1 x 4 ohm woofer?

or just 1 output?

the problem i can see is blowing up my amp if i show it some crazy ohmage

Michael Bean · 6th August 2011, 05:37 PM

If I'm right, it won't really matter if you use one or both as long you keep polarities correct, so try it with just one lead to the woofer.

Mike

60ndown · 06:00 PM

so if im understanding this correctly,

the woofer section of this crossover behaves *more or less* the same if i connect,

2 x 8 ohm woofers to both woofer outputs, (shows amp 4 ohms)

or

1 x 4 ohm woofer to just 1 woofer output? (shows amp 4 ohms)

makes sense to me 'kinda' ??

Michael Bean · 6th August 2011, 06:38 PM

You got it.

60ndown · 6th August 2011, 07:03 PM

Quote:

Originally Posted by Michael Bean

You got it.

thank you

ill try it and report back w my findings.

Francec · 7th August 2011, 05:29 AM

Which other drivers are you using? a mid-range that will cover 250 to 4,000 Hz won't be cheap.

6th August 2011, 04:26 PM	#1
60ndown diyAudio Member Join Date: Apr 2011	3 way crossover help please my latest project is a high fidelity bass guitar speaker, something i can play at home that will have hopefully much better tone then your average bass guitar amp/speaker combo. weather its right or wrong in theory i want to use a 3 way cross over. i purchased and received this recently, INFINITY REFERENCE 60 3 WAY PASSIVE CROSSOVERS 4ohm NEW - eBay (item 390293772393 end time Aug-28-11 16:23:48 PDT) it has 2 separate outputs for the woofer (as the speakers it is designed for used 2 x woofers) i failed to notice this before purchasing my question is, can i use just 1 woofer output or can i somehow use both outputs connected to 1 woofer, and what would that do to x over point and slope and ohms that the amp would see etc??? id like to be able to use 200 watts on the woofer section (which is what the 3 way x over is rated at) any help/advice appreciated.......

6th August 2011, 05:47 PM	#6
60ndown diyAudio Member Join Date: Apr 2011	so if im understanding this correctly, the woofer section of this crossover behaves more or less the same if i connect, 2 x 8 ohm woofers to both woofer outputs, (shows amp 4 ohms) or 1 x 4 ohm woofer to just 1 woofer output? (shows amp 4 ohms) makes sense to me 'kinda' ?? Last edited by 60ndown; 6th August 2011 at 06:00 PM.

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6th August 2011, 04:45 PM	#2
Michael Bean diyAudio Member Join Date: Sep 2004 Location: Minneapolis, Minnesota, USA	Well...using a passive crossover with drivers it wasn't designed for won't work as expected, rolloff slopes and driver levels probably won't be right. Since that crossover is rated for 4 ohms, they are most likely using two 8 ohm woofers in parallel, so I'm guessing if you hook up one 4 ohm woofer it will "work". Having said that, if you allready have everything, no problem trying it to see how it sounds. Mike

6th August 2011, 04:47 PM	#3
CharlieLaub diyAudio Member Join Date: Mar 2007 Location: California	A passive crossover is designed to be used only with a specific set of drivers. An active crossover can be used with any drivers. I suggest you look in to and buy the latter type and some amps, or learn how to build a proper passive crossover (not easy). -Charlie

6th August 2011, 05:37 PM	#5
Michael Bean diyAudio Member Join Date: Sep 2004 Location: Minneapolis, Minnesota, USA	If I'm right, it won't really matter if you use one or both as long you keep polarities correct, so try it with just one lead to the woofer. Mike

6th August 2011, 06:38 PM	#7
Michael Bean diyAudio Member Join Date: Sep 2004 Location: Minneapolis, Minnesota, USA	You got it.

7th August 2011, 05:29 AM	#9
Francec Banned Join Date: Jul 2006 Location: Port Melbourne, Australia	Which other drivers are you using? a mid-range that will cover 250 to 4,000 Hz won't be cheap.

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