Lissajous figures without a scope...possible?
ShinAce
Posts: 1,194
Back when I used to live at home, I had a B&K o-scope in my inventory. I've since had to ditch it for lack of room.
I'm now looking at rebuilding a crossover for a set of 2-ways but don't have a scope to measure phase. These are DIY speakers so don't refer me to the manufacturer; that's me. The existing xover is a pre-made 8 ohm 3KHz.
Is there another way to derive phase angles using test tones and a DMM? Or could I just use published CLIO exports and a little EE know-how to get proper alignment at the xover freq?
I'd love to fine tune the crossover since I'll be using a nice cap on the tweeter, but I'm starting to think it's not worth it without a scope.
I'm now looking at rebuilding a crossover for a set of 2-ways but don't have a scope to measure phase. These are DIY speakers so don't refer me to the manufacturer; that's me. The existing xover is a pre-made 8 ohm 3KHz.
Is there another way to derive phase angles using test tones and a DMM? Or could I just use published CLIO exports and a little EE know-how to get proper alignment at the xover freq?
I'd love to fine tune the crossover since I'll be using a nice cap on the tweeter, but I'm starting to think it's not worth it without a scope.
Post edited by ShinAce on
Comments
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I think you would need to do acoustical measurements to really see the true phase relationship between drivers and their filters.Testing
Testing
Testing -
Interesting!
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I believe that you can do it with a wallin jig & speaker workshop. This will do just about everything that the woofer tester from partsexpress will do.
http://www.speakerworkshop.com/Gallo Ref 3.1 : Bryston 4b SST : Musical fidelity CD Pre : VPI HW-19
Gallo Ref AV, Frankengallo Ref 3, LC60i : Bryston 9b SST : Meridian 565
Jordan JX92s : MF X-T100 : Xray v8
Backburner:Krell KAV-300i -
I believe that you can do it with a wallin jig & speaker workshop. This will do just about everything that the woofer tester from partsexpress will do.
http://www.speakerworkshop.com/
:cool::D
Too cool. -
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>This message has been scanned by the NSA and found to be free of harmful intent.< -
Back when I used to live at home, I had a B&K o-scope in my inventory. I've since had to ditch it for lack of room.
I'm now looking at rebuilding a crossover for a set of 2-ways but don't have a scope to measure phase. These are DIY speakers so don't refer me to the manufacturer; that's me. The existing xover is a pre-made 8 ohm 3KHz.
Is there another way to derive phase angles using test tones and a DMM? Or could I just use published CLIO exports and a little EE know-how to get proper alignment at the xover freq?
I'd love to fine tune the crossover since I'll be using a nice cap on the tweeter, but I'm starting to think it's not worth it without a scope.
Do you live in a milk carton?CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint. -
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No, but you might see my face on the side of one.
I used to share tools with my dad, way back when. When I moved out, I took some tools with me, including my tablesaw. I ditched the scope when I moved into an apartment since it was such a specialized tool and massive(about 40 lbs). It's not worth it for me to buy a newer and smaller scope for a single project.
