Hi All,
Newbie here in DIY speaker building so apologies if this is easier.
I just got myself the following:
SEAS Excel T25CF-002 (E0011) Millennium Tweeter
Seas Excel W15LY001 Midwoofer
The problem is - I cannot tell which terminal at the back is +ve and which one is -ve. Its just not clearly marked.
Here is what i can see:
On the Tweeter:
There are no color markings.
On one of the terminals there is a embossed "+" (I think) in the black plastic (or whatever the material is called) that encases the tweeter assembly. The issue is - Depending on how I hold it, it can also be an "X"
The other terminal has no markings.
Should I assume the + is the positive and run with it.
I see on YT there are ways to test with a 9V battery but I am afraid to try until I have checked with the experts here.
Also, if I used the battery way of testing polarity - with a soft dome tweeter, will the little middle part push out or in depending on the polarity? (Easier with woofers)
On the Woofer:
This one has color markings - One of the terminals is red. So is the red +ve or -ve.
Thanks so much in advance.
Rajiv
Newbie here in DIY speaker building so apologies if this is easier.
I just got myself the following:
SEAS Excel T25CF-002 (E0011) Millennium Tweeter
Seas Excel W15LY001 Midwoofer
The problem is - I cannot tell which terminal at the back is +ve and which one is -ve. Its just not clearly marked.
Here is what i can see:
On the Tweeter:
There are no color markings.
On one of the terminals there is a embossed "+" (I think) in the black plastic (or whatever the material is called) that encases the tweeter assembly. The issue is - Depending on how I hold it, it can also be an "X"
The other terminal has no markings.
Should I assume the + is the positive and run with it.
I see on YT there are ways to test with a 9V battery but I am afraid to try until I have checked with the experts here.
Also, if I used the battery way of testing polarity - with a soft dome tweeter, will the little middle part push out or in depending on the polarity? (Easier with woofers)
On the Woofer:
This one has color markings - One of the terminals is red. So is the red +ve or -ve.
Thanks so much in advance.
Rajiv
Many drivers have a wider connector for positive and narrower for negative, can't remember if Seas does this.
I had same thing with my car setup, dont know what happened but half of speakers went reverse polarity. I check them with microphone.
Using ARTA to calculate the impulse response will also show absolute polarity. Compare to a driver with known polarity, as the sound card or amplifier might be inverting somewhere.
For telling the polarity of a dome tweeter, I use a magnifying glass and a 1.5V battery with a 150 ohm resistor in series to limit the current to a safe value, and I tap the tweeter with this source and observe dome motion under the glass. I am able to discern the dome travel direction and the resultant polarity of connection. I would not place the battery across the tweeter without the current limiting resistor, however.