Anarchy Exodus 4 + RS100P-8 + SB19

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

I got my pair from diysoundgroup.com

[donradick]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Beautiful work ,jclin4 - quite a bit going into a deceptively simple design/build.
Thanks for the build log.

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

I'm very reluctant to take these apart now, but the voicing stage is over and it's time to finish the cabs as weather will turn colder. Finishing will be done outdoors and in an unheated garage. I really enjoyed listening to these over the past few weeks.



Didn't have to do much voicing-wise, but the biggest difference was in the small cap used in parallel with the woofer coil in the tank circuit (there is also a resistor in there to avoid a direct cap path to ground).

Modeling called for a .4uF cap, but .47uF and .33uF are commonly available. Started out with the larger value and then moved to the smaller one. Although almost no difference in FR, the resulting sound was much cleaner. It brings home the point that FR isn't the whole picture, as well as the importance of paying attention to what drivers are doing outside their pass bands.

[Face]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Hopefully we'll hear these at the next NY DIY.

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Yup, that's the plan. And thanks Mike for supplying the RS100P's for this build These make for very nice midranges.

The Anarchy's are a super-impressive 6.5" woofer. I now understand why you have used these in multiple builds, including the last iron driver comp.

[jim85iroc]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Very nice! Can you comment on how the midrange sounded compared to how it measured? Particularly, I'm curious about how the open baffle effected perceived midrange levels compared to your nearfield measurements & simulations.

[Face]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Yup, that's the plan. And thanks Mike for supplying the RS100P's for this build These make for very nice midranges.

The Anarchy's are a super-impressive 6.5" woofer. I now understand why you have used these in multiple builds, including the last iron driver comp.

You're welcome, I'm looking forward to hearing these.

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Very nice! Can you comment on how the midrange sounded compared to how it measured? Particularly, I'm curious about how the open baffle effected perceived midrange levels compared to your nearfield measurements & simulations.

I haven't taken full system measurements yet, but when I took the in-cabinet measurements of the RS100P's I was surprised by how flat the response was. I was expecting a large peak and valley in the 1k-2k range that I had seen in my Aengles OB project. Not sure if the flatter response is due to the U frame or 'midrange tunnel' in this build.

I also am using polyfill stuffing in the cavity to help control midrange output through the rear. Although I measured with and without stuffing and could see no appreciable difference in FR, it made a difference to my ears.

I spent more time playing with stuffing and positioning of the speakers than tweaking the XO during voicing.

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

It was warm yesterday and I started painting the cabs in my garage. Today, was much colder so I was forced to move indoors. Good thing Duratex does not smell!

Between the two days, I got down 3 coats with a sanding on the first (priming) coat.



I laid down frog tape to cover the Baltic Birch edges; first time using the stuff. Gosh, I sure hope it holds :eek:

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Back on the topic of the dipole midrange, below is the on-axis measured response of the RS100P-8 in the cabinet. As I said, pretty smooth from 800Hz to 3000Hz. This made crossover work much easier:



And here are the off axis measurements, @ 0, 15, 30 and 60 degrees:

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Phew! The Frog Tape held! I realized that I had to remove the tape after yesterday's painting, because if the duratex cured fully (after about 5 days), it might be too hard to remove the tape without taking paint away with it.

But the tape fully protected the BB edges from the paint, no bleeding, and pulled away easily without the need to score with a razor, leaving nice clean lines.



Now it's on to gel urethane (General Finishes) for the BB. I got good results on other projects with about 8 coats.

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Finished the finishing recently; project complete! Here are some glam shots:

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

And now measurements. This is on-axis and same distance from wall, as pictured above, i.e. normal listening position but I lifted the speakers a few feet to get them off the floor more for better gating. Measurements are good, 250Hz and above:



I was pleased with how these measured (and also how they sound ;)). Now the horizontal off-axis measurements, 0, 15, 30, 60 degrees. But obviously these will measure differently depending on whether you place the microphone toward the center or outer-wards. First the inner followed by outer measurements:

[jclin4]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

Finally, since these are open-back, dipole midrange speakers, I wanted to know the effect of having a wall behind, vs taking the measurement in the middle of my room, as I had done with the individual drivers prior to crossover design. Red is middle of the room and Black is in listening position:



Actually the wall helps...a bit smoother from 300Hz to 1.3kHz. No surprise, these are sensitive to placement, and I had to play around a bit. But that's all part of the fun!

Cheers,
- John

[bullittstang]

Re: Anarchy Exodus 4 + RS100P-8 + SB19

very nice finishing, but of course us Texans are partial to a Burnt Orange hue of any kind!!! Thanks for the measurements, very thorough and I agree that placement could make a big difference in a room with these.