[jmimac351]

I recently rescued a speaker with Accuton drivers.  It had to be done. 

Clearwave Loudspeaker Design Symphonia 1

The drivers in this speaker are top shelf Accuton and Scan-Speak

   • Accuton Cell C25-6-158: $554 each
   • Accuton Cell C90-6-724: $742 each
   • Scanspeak Illuminator 18WU/4747T-00: $356 each​

Unfortunately, the bottom end could be a bit more to my liking.  It sounds like perhaps the woofer was loaded in a smaller enclosure to try to help it be fast... like the Accuton.  There is a big mid-bass HUMP that I don't like. 

Frederick had the idea to "reverse the port" to see what happens... well, it got better. 

Then I remembered I have large 4" ports that will be used in the Duelund Coherent Audio Monitors we are building... how about those?

Well, it got even better - Deeper Bass / less mid-bass HUMP.

Hey, how about putting a little fiber fill in the port? 

Yep, even better. 

I have peeked inside and it's very tight confines in the bottom cavity.  EXTREMELY well made enclosure - ROCK SOLID.  Appears to have No-Res as well. 

This has been very interesting to hear the dramatic difference enclosure volume has on woofer response. 

As for the Accuton? AWESOME.  I am extremely impressed with those drivers, and it sounds like Jed Kunz did the network right.  This speaker came with Mundorf parts for the tweeter / mid network.  I have not dug into that yet but below is the network for the Scan-Speak woofer. 

It's not lost on me that I am a pair of (very expensive) 8" Accuton woofers away from having a custom Accuton 3-way speaker.  And with the taste I'm getting from the Tweeter / Mid... that could be really something.

I think this speaker needs a bigger box.  There is a horizontal shelf just above the woofer to seal the Accuton Tweet / mid in their own space.  The woofer just has the space below that, there is another thick brace, plus the wall thickness on a baffle that is already narrow.  And the speaker is not deep.  The Odyssey Lorelei that I had briefly had a SS 8545 woofer in it, and the enclosure what MUCH larger than this.  The bass was HUGE. 

This speaker, with bigger bass like that would be very impressive.  The Accuton is already right on, and ultra extended highs with zero fatigue. 

They are very special.  Maybe I'll ask the speaker design expert at GR, Hobbs, what he thinks about how an 8" Accuton 3 way will work out... 

I don't have my Line Arrays yet, so I keep buying speakers. 

I wonder if Danny has anything better coming soon...

[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?

[jmimac351]

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?

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

As Danny has mentioned... the low end is set by the enclosure.  I don't think this is a crossover issue.  I think the enclosure is just smaller than I'd like, for the sound I want.

Sharing this here because I thought it was interesting how I was able to get better sound out of it, playing with a tube.