I've been thinking of upgrading my main living room system for a while, but was undecided whether I should. It mostly looks like this:
It's a "2.1" system with active crossovers. The top speakers are powered by the two amps sitting on the floor, while the sub has the amp inside. What I would like to improve is:
The subs are SB acoustics and I'm quite impressed by how well they sound, so I've been looking at using their drivers for the tops. For the woofer I'll use the the SB17NRX2C35 6 inch. As for the tweeters, I'll list some potential candidates below and maybe get some opinions on them:
The crossover frequencies will most likely be 75Hz and 2.5kHz. For powering them I have two options:
I already have boards built for the second option, but they don't have the crossover included. I'd like to design a board that has the crossovers and the amps and make it as small as possible. Then I could choose whichever combination. I was also looking at TPA3116 boards.
As I said, I'd like to have all the electronics mounted on the back of the speaker. I initially thought of placing them inside the enclosure, but with a sealed design I don't think power dissipation will be adequate. And then there's the issue of sealing the plate so that air doesn't escape. So I'll have some sort of small enclosure on the back of the speaker, with the heatsink on the outside. That is probably the biggest challenge.
Anyway, I'll post the progress as I go.
It's a "2.1" system with active crossovers. The top speakers are powered by the two amps sitting on the floor, while the sub has the amp inside. What I would like to improve is:
- replace the top speakers - while they sound quite nice, I think I can do better
- build the second sub - I have the driver and amp, I need to build the enclosure and the power supply
- replace the amps with something smaller, probably chip amps, and have everything (including the crossover) plate-style on the back of the speakers. I want to get rid of the cable mess as much as possible.
- build some acoustic panels for the room they're in
The subs are SB acoustics and I'm quite impressed by how well they sound, so I've been looking at using their drivers for the tops. For the woofer I'll use the the SB17NRX2C35 6 inch. As for the tweeters, I'll list some potential candidates below and maybe get some opinions on them:
- SB29RDNC
- DC28F or RST28F from Dayton
- Vifa XT25BG60
- Scanspeak D2604/833000
The crossover frequencies will most likely be 75Hz and 2.5kHz. For powering them I have two options:
- LM3886 for both drivers
- TDA7294 for the woofer + LM3886 for the tweeter
I already have boards built for the second option, but they don't have the crossover included. I'd like to design a board that has the crossovers and the amps and make it as small as possible. Then I could choose whichever combination. I was also looking at TPA3116 boards.
As I said, I'd like to have all the electronics mounted on the back of the speaker. I initially thought of placing them inside the enclosure, but with a sealed design I don't think power dissipation will be adequate. And then there's the issue of sealing the plate so that air doesn't escape. So I'll have some sort of small enclosure on the back of the speaker, with the heatsink on the outside. That is probably the biggest challenge.
Anyway, I'll post the progress as I go.
I received the boards and populated the amplifier section so I can first test it separately. However, I barely get 1W of power per channel out of it. I'm driving it directly from the phone but the input signal should be enough. What could be the issue?
