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With that configuration, I would buy subwoofer plate amplifiers that can take speaker input to drive the sealed woofers, then cross it around 70Hz or so. Keep the FR and tweeter as it is. You can customize the bass however you want it much easier. Nothing much to spec a sealed enclosure.

It's all good with different crossover as long as you like the sound. Here's the measurement with my crossover. Trying to be as natural as possible. No emphasise on certain freq. I stay near Bukit Gombak MRT. You are welcome to drop by for a chat or listening to music.

Built by synthesis 😉 That additional baffle is because the previous owner wanted to change drivers combination from original configuration.

Could be issue with speaker terminal connector or maybe loose solder. Curious, what speaker is this?

Swap the left and right speakers. Check if the issue follows the speaker

Not the issue with the amp or interconnect, etc?

Your standard maybe very high.....😉 Marantz CD player can do streaming/Tidal if you like the sound. I'm ok with the sound from Marantz ND8006 but I don't like the HEOS app interface

I also stay near Bt Gombak MRT, too :)

I shared before https://hifive.sg/index.php?threads/audio-gear-damage-from-our-friendly-wheather.446/

Port diameter and depth affect the port tuning frequency. Changing the airflow in the port will affect the tuning frequency as well.

I was half joking reminding Boxerfan of the video that he shared some time back. On the other hand, there is technical merit on twisting cable to improve EMI. Here is one explanation from quick search https://emianalyst.wordpress.com/2016/08/31/how-cable-twisting-improves-emi/ How much it will...

Don't forget to twist 😁

Can go to LHS at Sim Lim Tower 2nd fl

Maybe you will be even happier with your setup after listening to my setup...haha.... Anyway you are welcome to drop by.

Thank you for coming! I'm happy that we get a chance to meet in person. Definitely keep in touch

Measurement and EQ: great combo 😁

I don't know if we should be concerned about the freq under 20hz. The woofer has very little output anyway. I think any amp that can handle 4 ohm should be able to handle this woofer. I never really checked the off axis response. I just moved around a bit to check if any significant dip around...

Continuing with measurement to verify that crossover is ok. Smooth frq response indicates good working crossover with correct driver polarity. Original crossover showed slight rise up towards high freq. This actually made the sound a bit more catchy; good for show room. Slight adjustment by...

I was happily surprised when I saw this shop last month.

Check out avdisco.com Ask to visit few regulars over there. Their home setup should be much better than the show.