[jmimac351]

...

[Early B.]

An uber-expensive Accuton woofer probably won't solve your issues, especially if the smallish enclosure is a limiting factor. My guess is that the best alternative will be a crossover makeover to dial in the bass. Anything beyond that probably won't be worth the investment. Why don't you ship one of the speakers to Texas for Danny/Hobbs to measure and provide options?

[Early B.]

I would have a custom enclosure made for Accuton 3-way - not keep this same enclosure.

Oh, OK. These speakers will be parted out, and the Accuton pods will be repurposed into a custom cabinet along with an Accuton woofer. Cool! You're a wild & zany audiophile!!!

This will be about a 9-month process. You'll have to build a test cabinet(s). How will you determine the size and design of the cabinets? Ported or sealed? Rear ambient tweeter? Powered servo subwoofer on the bottom?

This will be fun. I'm gonna go and make some popcorn...

[Glady86]

You should look into a pair of subs so you can dial in the bass, trying to get good bass from full range speakers can be challenging without some kind of way to dial it in.

[Glady86]

Are you able to use REW to measure the response? The only cheap way to try and fix it is EQ, or high pass the problem frequency out of the mains and let the subs handle it, that is if it’s not to high up the bass band.

A Shcitt Loki + is cheap to try for EQ, but I don’t know if the two bass controls would help. Possibly need more bands of the higher end unit which cost a lot more.

[fre11111]

I think part of the conversation that is getting lost is what is the optimum cabinet volume for the Scanspeak Illuminator 18WU/4747T-00? Madisound says that it is 1.0 cu ft tuned at 42hz.

[jmimac351]

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[Glady86]

Any good quality amp will work well with the higher efficiency NX series. I used 3.5 watt tube to 200 watt solid state, I like the lower power 300b and 2A3 tube sound more than the solid state amps I own. Though I do have the speakers high passed at around 80hz, so it helps when using low power.

[jmimac351]

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[Stercom]

The speakers just need an amp with a healthy dose of current - and they loved it. 

Yep, current is the key for most speakers to provide quality bass. Many people think watts drive speakers but its actually current. Small watt amps with an excellent power supply and/or output transformer will usually provide quality bass. High watt amps with crappy power supplies and/or transformers usually sound thin. This is especially true if the impedance drops much below 4 ohms.

[Tyson]

This is why the servo subs are so good - sheer torque.

[jmimac351]

Yep, current is the key for most speakers to provide quality bass. Many people think watts drive speakers but its actually current. Small watt amps with an excellent power supply and/or output transformer will usually provide quality bass. High watt amps with crappy power supplies and/or transformers usually sound thin. This is especially true if the impedance drops much below 4 ohms.