KraftyBob
Well-Known Member
Hello:
I have a post in the amps section about a cab I bought but now I want to focus on the speakers. Long story short I bought a headless Marshall 2x12 Solid-state something (not sure what amp it was) with the intention of pulling the assuming crappy 2x12's and making a 1x12 baffle and loading it with a V-Type to accompany my DSL40C w/Creamback 65. I bought this because the DSL is a wider than normal combo and it's hard to find a 1x12 extension as wide. I paid a whopping $30 for it.
I get the cab home, open it up and low and behold it looks like it has two Black Shadow/C90 speakers in it. They are not labeled but one has SP.0287 stamped on the magnet - which from what I read seems to be the C90. The other is not stamped but looks physically identical.
Here are my questions/problem...
Speaker #1 (stamped w/SP.0287)
This one does not have anything written on it but when I test it with a meter I get 13 ohms which tells me this is a 16 ohm speaker - perfect, that's what I need. The cone responds well to a 1.5v battery too. Problem: There's a slight scratchiness when I press down on the cone (see video - turn up your volume). I connected it to my amp and it sounds great - I don't hear anything that would indicate the speaker is bad. I've also read other people say a lot of their speakers make some noise when they press down, and others say the speaker should be dead quiet. BTW the other speaker doesn't make any noise and is a little tighter.
Question: If there's noise when pushing down on a speaker does that automatically mean it's bad? If I used this in a 2x12 setup with the internal speaker and it eventually goes, do I risk ruining my amp? I'm thinking my the other speaker will maintain a load so I should be ok?
Speaker #2
This one is not stamped with a model # but is an exact twin of speaker #1 so I'm assuming it's also a C90. There is an ink stamp on the frame that indicates 16 ohms. Problem: When I measure it with a meter I get 7.3 ohms. That tells me it's actually an 8 ohm speaker, but then why the 16 ohm marking?
Question: When a speaker starts to go bad does it lose resistance or just completely go (and read open)? I haven't tested this with my amp as I'm not sure which output to use. I suppose I could use the 8 ohm output and it would be fine to test with whether it's 8 or 16 ohms?
The problem here, assuming the speaker is good and it's actually 8 ohms, is I can't use as I need a 16 ohm speaker. At that point I guess I'm back to my original plan which is I bought it for the cab and didn't care about the speakers.
I have a post in the amps section about a cab I bought but now I want to focus on the speakers. Long story short I bought a headless Marshall 2x12 Solid-state something (not sure what amp it was) with the intention of pulling the assuming crappy 2x12's and making a 1x12 baffle and loading it with a V-Type to accompany my DSL40C w/Creamback 65. I bought this because the DSL is a wider than normal combo and it's hard to find a 1x12 extension as wide. I paid a whopping $30 for it.
I get the cab home, open it up and low and behold it looks like it has two Black Shadow/C90 speakers in it. They are not labeled but one has SP.0287 stamped on the magnet - which from what I read seems to be the C90. The other is not stamped but looks physically identical.
Here are my questions/problem...
Speaker #1 (stamped w/SP.0287)
This one does not have anything written on it but when I test it with a meter I get 13 ohms which tells me this is a 16 ohm speaker - perfect, that's what I need. The cone responds well to a 1.5v battery too. Problem: There's a slight scratchiness when I press down on the cone (see video - turn up your volume). I connected it to my amp and it sounds great - I don't hear anything that would indicate the speaker is bad. I've also read other people say a lot of their speakers make some noise when they press down, and others say the speaker should be dead quiet. BTW the other speaker doesn't make any noise and is a little tighter.
Question: If there's noise when pushing down on a speaker does that automatically mean it's bad? If I used this in a 2x12 setup with the internal speaker and it eventually goes, do I risk ruining my amp? I'm thinking my the other speaker will maintain a load so I should be ok?
Speaker #2
This one is not stamped with a model # but is an exact twin of speaker #1 so I'm assuming it's also a C90. There is an ink stamp on the frame that indicates 16 ohms. Problem: When I measure it with a meter I get 7.3 ohms. That tells me it's actually an 8 ohm speaker, but then why the 16 ohm marking?
Question: When a speaker starts to go bad does it lose resistance or just completely go (and read open)? I haven't tested this with my amp as I'm not sure which output to use. I suppose I could use the 8 ohm output and it would be fine to test with whether it's 8 or 16 ohms?
The problem here, assuming the speaker is good and it's actually 8 ohms, is I can't use as I need a 16 ohm speaker. At that point I guess I'm back to my original plan which is I bought it for the cab and didn't care about the speakers.
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