Hi everyone,
I’m completely new to DIY loudspeakers and have been teaching myself as I go. I have made a 2.1 system and want to try and achieve audiophile sound quality. Used to have a 1st order set-up but changed it to a 2nd order set-up to improve sound quality and have a steeper roll off/crossover.
Below is a full parts list and wiring summary for my 2nd order design.
-Woofer: SB Acoustics SB17NRX2C35-4 (6 ½″)- Sitting in an 9L ported box (I know, not ideal. Using older bookshelf speaker box).
-Tweeter: SB Acoustics SB26STAC-C000-4 (fabric dome)
-Sub: Dayton SD215A-88 8″ (connected to amp sub channel by itself- is in a 24.7L sealed box).
-Amplifier: AIYIMA TPA3116 Subwoofer Amplifier Audio Board TPA3116D2 2.1 (DAC Bluetooth Power Amplifiers 2x50W+100W)
-Power: 25.6V 7Ah lithium ion deep cycle battery 2x 12.8V 7Ah batteries wired in series with a 10 amp fuse between them).
Current Wiring Set-Up for the 2nd-order design:
-Woofer (LPF) – 0.27 mH / 18 AWG in series, 12 µF + 1.5 µF film caps in parallel → 13.5 µF (connected these two capacitors in parallel).
-Tweeter (HPF) – 6.8 µF film cap in series, 0.22 mH in parallel. Tweeter polarity reversed.
-Targets: ~2.8 kHz LP, ~3.0 kHz HP (electrical), Linkwitz-Riley alignment.
Capacitors are Dayton PMPC 250 V film (1 % tolerance). Inductors are air-core.
Questions:
1. Do my electrical XO points (~2.8 kHz LP, ~3.0 kHz HP) look sensible for these SB drivers, or would you slide them up/down?
2. My woofer is in an 8 L ported box, apparently roughly giving out 55 Hz. What volume/tuning would you call “optimal” for a this? For Audiophile grade audio quality, should I go with a ported or sealed enclosure for the woofers (If audiophile quality is possible, that is). Perhaps go with a sealed enclosure to keep the box smaller and more portable?
3. Is this sub ok for this set-up?
Any criticism or feedback is welcomed so I can improve this set-up. Sorry if I should mention more too.
I’m completely new to DIY loudspeakers and have been teaching myself as I go. I have made a 2.1 system and want to try and achieve audiophile sound quality. Used to have a 1st order set-up but changed it to a 2nd order set-up to improve sound quality and have a steeper roll off/crossover.
Below is a full parts list and wiring summary for my 2nd order design.
-Woofer: SB Acoustics SB17NRX2C35-4 (6 ½″)- Sitting in an 9L ported box (I know, not ideal. Using older bookshelf speaker box).
-Tweeter: SB Acoustics SB26STAC-C000-4 (fabric dome)
-Sub: Dayton SD215A-88 8″ (connected to amp sub channel by itself- is in a 24.7L sealed box).
-Amplifier: AIYIMA TPA3116 Subwoofer Amplifier Audio Board TPA3116D2 2.1 (DAC Bluetooth Power Amplifiers 2x50W+100W)
-Power: 25.6V 7Ah lithium ion deep cycle battery 2x 12.8V 7Ah batteries wired in series with a 10 amp fuse between them).
Current Wiring Set-Up for the 2nd-order design:
-Woofer (LPF) – 0.27 mH / 18 AWG in series, 12 µF + 1.5 µF film caps in parallel → 13.5 µF (connected these two capacitors in parallel).
-Tweeter (HPF) – 6.8 µF film cap in series, 0.22 mH in parallel. Tweeter polarity reversed.
-Targets: ~2.8 kHz LP, ~3.0 kHz HP (electrical), Linkwitz-Riley alignment.
Capacitors are Dayton PMPC 250 V film (1 % tolerance). Inductors are air-core.
Questions:
1. Do my electrical XO points (~2.8 kHz LP, ~3.0 kHz HP) look sensible for these SB drivers, or would you slide them up/down?
2. My woofer is in an 8 L ported box, apparently roughly giving out 55 Hz. What volume/tuning would you call “optimal” for a this? For Audiophile grade audio quality, should I go with a ported or sealed enclosure for the woofers (If audiophile quality is possible, that is). Perhaps go with a sealed enclosure to keep the box smaller and more portable?
3. Is this sub ok for this set-up?
Any criticism or feedback is welcomed so I can improve this set-up. Sorry if I should mention more too.
I'll let somebody with a working simulation program comment on the cross-over. I don't think a single 8" woofer is going to have enough sound pressure to sound balanced with those midbass drivers and in a 2.1 system I'd be using those drivers sealed for better integration with the sub.
I find I need a single 12" to sound balanced with a couple of 6" tops. You are the person listening to your efforts ; so what does it sound like to you?
Try stuffing the port too.
I find I need a single 12" to sound balanced with a couple of 6" tops. You are the person listening to your efforts ; so what does it sound like to you?
Try stuffing the port too.