Hello everybody!
From sometime now I have an idea but need help ofcourse 🙂
What I want to do is to make myself a bluetooth speaker a kind of clone to Marshall Woburn 3 at lieast sizewise but of course on a tight budget. Ie. a speaker with max dims - 400 x 317 x 203 mm (as the woburn) ot little less,
For now I bought :
1. BT receiver - https://www.aliexpress.com/item/1005...3cca18029Z3UDW
2. AMplifier - https://www.aliexpress.com/item/1005...3cca18029Z3UDW ZK-TB21 Bluetooth 5.0 Subwoofer Amplifier Board 50W*2+100W 2.1 Channel Power Audio Stereo Bass AMP TPA3116D2
The amp will be fed with 12 volts so probably will not give more than 30 watts
Speakerwise ... for the moment I am considering Visaton FR13 - https://www.visaton.de/en/products/drivers/fullrange-systems/fr-13-4-ohm
Or in view of the bigger box may be Visaton BG 20 which is just on the limit of my budget. https://www.visaton.de/en/products/drivers/fullrange-systems/bg-20-8-ohm
Now the questions
1. Do you think I will need an aditional bass driver in view of the low limit of the FR 13 which is 65 hertz. as far as I can see there a no or almost no cheap small bass drivers bellow this freq. If you know a budget bass driver please advise. Under budget ... price of FR13 is about euro 20 per piece, BG20 is about 40 euro so for bass budget will say less than 40 euro ...
2. BOX - how the box should be constructed - should it be closed volume or open with bass reflex, sould it be one volume for both speakers or myst be divided in the inside ...
have never made my own loudspeaker and dont have any idea of designing one. Any help will be welcome!!
From sometime now I have an idea but need help ofcourse 🙂
What I want to do is to make myself a bluetooth speaker a kind of clone to Marshall Woburn 3 at lieast sizewise but of course on a tight budget. Ie. a speaker with max dims - 400 x 317 x 203 mm (as the woburn) ot little less,
For now I bought :
1. BT receiver - https://www.aliexpress.com/item/1005...3cca18029Z3UDW
2. AMplifier - https://www.aliexpress.com/item/1005...3cca18029Z3UDW ZK-TB21 Bluetooth 5.0 Subwoofer Amplifier Board 50W*2+100W 2.1 Channel Power Audio Stereo Bass AMP TPA3116D2
The amp will be fed with 12 volts so probably will not give more than 30 watts
Speakerwise ... for the moment I am considering Visaton FR13 - https://www.visaton.de/en/products/drivers/fullrange-systems/fr-13-4-ohm
| Rated power | 30 W |
|---|---|
| Maximum power | 50 W |
| Nominal impedance Z | 4 Ohm |
| Frequency response | 65–20000 Hz |
| Mean sound pressure level | 88 dB (1 W/1 m) |
Or in view of the bigger box may be Visaton BG 20 which is just on the limit of my budget. https://www.visaton.de/en/products/drivers/fullrange-systems/bg-20-8-ohm
Now the questions
1. Do you think I will need an aditional bass driver in view of the low limit of the FR 13 which is 65 hertz. as far as I can see there a no or almost no cheap small bass drivers bellow this freq. If you know a budget bass driver please advise. Under budget ... price of FR13 is about euro 20 per piece, BG20 is about 40 euro so for bass budget will say less than 40 euro ...
2. BOX - how the box should be constructed - should it be closed volume or open with bass reflex, sould it be one volume for both speakers or myst be divided in the inside ...
have never made my own loudspeaker and dont have any idea of designing one. Any help will be welcome!!
About the amp/receiver, these portable speakers usually have DSP to make up for performance compromises. Consider this 2.1 amplifier, which also comes with built-in BT, DSP functions, physical buttons, and ports.
As for the speakers, I think neither of them is really suitable for this project. The FR13 has huge Qts (so forget about BR or bass in general unless the box is monstrously large), and the BG 20, while capable, is unnecessarily large and again requires a big box to show its capabilities truly.
The original Woburn has two 2-inch midrange drivers, two 0.75-inch tweeters, and one 6-inch woofer. In keeping with the spirit of the Full Range forum, perhaps you can use a pair of Faital Pro 4FE35s combined with a large passive radiator in the back. It simplifies construction since you don't need to use crossovers to make the tweeter-midrange-bass speakers play nice with each other or worry about port calculations. The Faital Pros have a high tolerance, so you have some freedom with DSP to squeeze low frequencies out of them. The passive radiator would also help in this regard.
As for the speakers, I think neither of them is really suitable for this project. The FR13 has huge Qts (so forget about BR or bass in general unless the box is monstrously large), and the BG 20, while capable, is unnecessarily large and again requires a big box to show its capabilities truly.
The original Woburn has two 2-inch midrange drivers, two 0.75-inch tweeters, and one 6-inch woofer. In keeping with the spirit of the Full Range forum, perhaps you can use a pair of Faital Pro 4FE35s combined with a large passive radiator in the back. It simplifies construction since you don't need to use crossovers to make the tweeter-midrange-bass speakers play nice with each other or worry about port calculations. The Faital Pros have a high tolerance, so you have some freedom with DSP to squeeze low frequencies out of them. The passive radiator would also help in this regard.