[Theronbo]

I built this sub woofer about 2 years ago. I’ve been told it wasn’t adequate for the size room (20’ x 30’) it was in.

& I wanted stereo bass…

So, back at it building a 2nd.

These kits are expensive. Though less than a single driver Rythymik … & Rythimyk doesn’t make an open baffle sub.

Followed the wiring diagram this time, rather than assuming I’d know how to wire it. Required the 1st one 3 times.

The Stereo is nice. But, just ‘more bass’ is impressive.

Sometimes quantity is its own quality…

[tremrej65]

Cool. I like it.
That's pretty much the setup I'll probably go with in my living room: X-statik and DT sub. Two questions: do you use a high pass filter on the X-statik, and what's the crossover frequency do you use on the DT subs?

[Theronbo]

Yes. There is a bass filte @80Hz.  it’s provided by the subwoofer plate amp.

Subwoofer’s have several connection options.  I use the pre amp out from my AVR (L to one sub R to the other) to Line level inputs. Then connect  line out to mono block amp … then to X-Static.

The Rythmik plate amps (yes, that Rythmik) filter below 80Hz out of the forwarded line levels.

It makes the X-Statics better speakers.. since they’re not having to produce the low frequencies.

I have the shut off for the double Troubles at 80Hz as well… 

Not certain this is the best way to ‘blend’ these speakers… but, it’s what I’m doing for now,

I have a microphone & ReW software… hope to learn to use it to blend the speakers as well as determine what sound treats my room may benefit from most.

[nlitworld]

Running stereo subs really opens up the soundstage though. I had a single sealed sub for a bit and while it sounded good, it really was able to be noticed when crossing about 80hz and pulled the soundstage 2' towards center in my small room. When one is good, two is more gooder.  also running a proper high pass filter with decent caps would be a big improvement over the rythmik amps doing the filtering for you.

[Theronbo]

Oh, I’d just get the version with both drivers facing forward.

I got the opposed since I’d planned to position the speaker sideways.

Because I only had one, I thought this would create better dispersal…

But, now I have 2 I now want conventional placement.

The drivers have a very shiny mount for the driver magnets… distracting, so I painted mine black.

[Craig Young]

I have rose wood end tables that look like yours with a drawer difference. My parents bought them from Hong Kong in the 60's.

[Theronbo]

I have rose wood end tables that look like yours with a drawer difference. My parents bought them from Hong Kong in the 60's.

LOL…

Well, if the thing is gonna sit in my living room… forever…

My X-Statics have a oak facing board… so used oak veneer… for trim I obtained some 3/4” copper strips…

There’s a guy in another build thread that’s making a figure 8 out of stacked MDF … very organic form.

Guess I’m not that original.

[KTS]

Yes. There is a bass filte @80Hz.  it’s provided by the subwoofer plate amp.

Subwoofer’s have several connection options.  I use the pre amp out from my AVR (L to one sub R to the other) to Line level inputs. Then connect  line out to mono block amp … then to X-Static.

The Rythmik plate amps (yes, that Rythmik) filter below 80Hz out of the forwarded line levels.

It makes the X-Statics better speakers.. since they’re not having to produce the low frequencies.

I have the shut off for the double Troubles at 80Hz as well… 

Not certain this is the best way to ‘blend’ these speakers… but, it’s what I’m doing for now,

I have a microphone & ReW software… hope to learn to use it to blend the speakers as well as determine what sound treats my room may benefit from most.

If you use one RCA splitter for left and one RCA splitter for right to connect both L/R on the plate amps you should gain 6db of output. This sometimes will sometimes help with a larger room.

[Theronbo]

If you use one RCA splitter for left and one RCA splitter for right to connect both L/R on the plate amps you should gain 6db of output. This sometimes will sometimes help with a larger room.

Thanks.

Did that.

The band pass filter on the Rythmik plate amp doesn’t appear to be working.

Playing some extreme bass tracks… well below 80Hz & X-Statics are attempting to play them …

WTF?!

Thinking about getting separate filters as others have suggested.

Do I filter line level signals to the mono block or after the mono block amps on the driven (amplified) lines to the speaker?

Crap.

Doesn’t even appear any controls on the band pass filter … should just happen.

[nlitworld]

Yeah the filters on the rythmik line out to your monoblocks should just be a generic first or second order filter @80 assuming some generic input impedance value. It will still play some below that, but not that much, unless your input impedance is an odd value. You'd be much better off having a high pass filter out of your preamp, split the signal to run full to your subs and filtered to your amps. Just find the input impedance of your amps and figure out where you'd like your xo to go to know your cap needed. It's about an hour worth of work to assemble.  I had some extra space in my preamp to just set it on the preamp outputs. Worlds better than the generic sub filters.

[Theronbo]

Thanks for the input.

So I can filter on the line level outs from the plate amp… going into the mono blocks?

Parts Express has some $20 each.

https://www.parts-express.com/80-Hz-High-Pass-8-Ohm-Crossover-266-458?quantity=1

[nlitworld]

Youd be better splitting them from your preamp
Preamp->high-pass filter->monoblocks. One rca from preamp to filter, then one rca from filter to monoblock and another rca from filter to sub.

Find the input impedance of your amps and your desired xo value, then use the High Pass Filter Calculator and figure out what capacitor size you need. Probably something pretty small so you can use a super nice cap like Sonicap, Miflex, Duelund, etc.

Pop onto This Thread and it'll show you how easy it is to pop together.

[Danny Richie]

Thanks for the input.

So I can filter on the line level outs from the plate amp… going into the mono blocks?

Parts Express has some $20 each.

https://www.parts-express.com/80-Hz-High-Pass-8-Ohm-Crossover-266-458?quantity=1

You do not want to put that in your signal path.

[Danny Richie]

Yes. There is a bass filte @80Hz.  it’s provided by the subwoofer plate amp.

Subwoofer’s have several connection options.  I use the pre amp out from my AVR (L to one sub R to the other) to Line level inputs. Then connect  line out to mono block amp … then to X-Static.

The Rythmik plate amps (yes, that Rythmik) filter below 80Hz out of the forwarded line levels.

It makes the X-Statics better speakers.. since they’re not having to produce the low frequencies.

I have the shut off for the double Troubles at 80Hz as well… 

Not certain this is the best way to ‘blend’ these speakers… but, it’s what I’m doing for now,

I have a microphone & ReW software… hope to learn to use it to blend the speakers as well as determine what sound treats my room may benefit from most.

You do not want to put that in the signal path either. That just adds an electrolytic cap inline with the signal.

[Danny Richie]

This is the right way to do it: https://gr-research.com/hi-pass-filters/

[Theronbo]

This is the right way to do it: https://gr-research.com/hi-pass-filters/

Thanks fr your input Danny.

From reading your document.

I’d be best to build that simple box … that has one input & 2 outputs… one filtered one not.

Plug that in from my AVR pre amp output … with

Filtered going to mono block amps then to X-Statics.

The  unfiltered output going to the line in of the Rythmik plate amp.

Thus don’t use outputs from plate am at all.

Correct?

[Theronbo]

Actually, eyeballing the project box. I see both outputs are filtered.

Could easily do my way… or just use a Y cable on the line out pre amp signal from AVR.

[tremrej65]

Actually, eyeballing the project box. I see both outputs are filtered.

Could easily do my way… or just use a Y cable on the line out pre amp signal from AVR.

If you look carefully, you'll see only one output is filtered. The filtered output goes to your mono block amp. The non filtered one goes to the line in of the Rythmik plate amp.
I'll send you a picture of mine, but they are not built yet. Maybe this weekend.

[Theronbo]

If you look carefully, you'll see only one output is filtered. The filtered output goes to your mono block amp. The non filtered one goes to the line in of the Rythmik plate amp.
I'll send you a picture of mine, but they are not built yet. Maybe this weekend.

I did look carefully.

Both outputs are filtered.

But, easy enough to do either way.

[HAL]

The left RCA female is the input from the preamp.  The middle RCA female is the sub output and the right RCA male connector is the highpass and goes to the normal amp.