Hi all, I'm a beginner in this DIY speaker area and I have a few questions wanted to be clear about. I'm planning on building a small speaker system with 1 tweeter and 1 woofer on each channel. I recently found out that I can use a capacitor instead of a crossover for the tweeter. But I have to be careful with my choice of the tweeter and the capacitor. I'm currently having a mid-bass driver (40hm - 20w) and a Pam8610 module. My question is, should the tweeter and the woofer have to have the same Impedance (4ohm)? if it is, how can I know what kind or value of the capacitor I need to use. ?
Thanks all
Here's my diagram :
Thanks all
Here's my diagram :
They do not need to have the same impedance.
First you should choose a frequency to cross. In your case this will be high enough to not cause damage, but low enough to meet the woofer. What it the tweeter resonance frequency?
First you should choose a frequency to cross. In your case this will be high enough to not cause damage, but low enough to meet the woofer. What it the tweeter resonance frequency?
Based on the seller's info here are the tweeter specs:
Impedance: 8 Ohm
Wattage: 20w
Highest Frequency: 50000Hz
Lowest Frequency: 45Hz
Image :
I do not trust the low frequency specification for this tweeter. I think you will have to do tests to find out what it can do.
What size is your woofer?
What size is your woofer?
Note ...keep an eye on the speakers impedance ... if you put 2x 4ohm drivers in parallel as in your diagram then you will have 2ohms of impedance on each side ... the PAM8610 is rated at a minimum of 4ohms.
No, that's now some "old" tweeter, not with that recently developed QR code sticker on it.
Likely some cheap chinese fake from that ali site.
At a guess, you might try bringing in your tweeter filter in the 6k-10k region. You will need to consider the level as well.
I never heard of a tweeter with a 45Hz bottom-end.
And that 50K is a bit of a stretch too.
The tweeter was from another speaker as the seller said it was from an old Harman Kardon speaker and the subwoofer was from an old JBL Xtreme 2
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Okay, tough to get anything from those links.
A 3/4 silk dome might get you 1000 Hz to 20K, best case. Without knowing the FR of the little mid bass, you don't know where to cross it. Without the ability to measure things, it will be pure hit and miss. Are there no Vietnamese site you could go on to see who might help you?
A 3/4 silk dome might get you 1000 Hz to 20K, best case. Without knowing the FR of the little mid bass, you don't know where to cross it. Without the ability to measure things, it will be pure hit and miss. Are there no Vietnamese site you could go on to see who might help you?
Viewing that link, I fail to see anything "old" about it.
Particularly since it's go a Neo magnet, a relatively new design.
I went there and they suggest to use a 3.3uf capacitor with my setup and the speaker wire Parallel , that's all i can get
Without getting involved in all the technicalities, I suggest you use a 4uF film capacitor like this one:
https://www.ebay.com/itm/163235819329?hash=item26019cef41:g:hJAAAOSwgsVbjHoY
EDIT: The 3.3uF suggestion is good too!
Make sure you wire the capacitor as shown in the attachment.
EDIT: Yes, you had the wiring right!
EDIT: Yes, you had the wiring right!
Attachments
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