I've tried finding a good, small, simple Crossover that could be used in front of the B1s.
Found a couple of raw, circuit board types that had to be hardwired, but never found anything to my liking.
So I've given up on the idea.

I've gone with scaling the gig gear to the instruments involved.
Full band, two or three Model IIs with B1s.
Duos, and open mic gigs, two compacts and a T1, but no mic'ing the kick drum.
This forced me to modify the kick, and tune my drums a little better.
It's working out.

I see you use a single Model 1 typically.
How often do you do DJ gigs with your Compact(s)?
Makes sense actually. I've only started using my Compact for smaller receptions recently and have been absolutely blown away by it, although it certainly has limitations. Here are some pictures from the first time I used the Compact exclusively, even though I had an L1 M1 in the car with a pair of B1s.

Kefalonia Wedding Reception
Hi Roy,


It looks like that might work.

Notes from the Rolls SX21 Manual







Do you have ANYTHING with a crossover that you could try before spending the money on this?


I've got at least three half-octave graphic equalizers sitting in storage in my old gig rigs. Do you have anything like that lying around that you could try?
I'm sure the only drawback to this will be that you don't have that built in Bose "shaping" of the EQ frequencies, that you get built into the L1 units prior to the bass out and B1 output.
I discovered this trying to use my Porchboard direct into the A1/B1 combo with and without the T1.
It did not sound as nicely shaped as running the Porchboard directly into the Model II power stand, and into a B1...no comparison, really.

If you are great with EQ, I'm sure it is no problem, but I'm just not that great.
Still, anything that will help,even a little, with the Porchboard, or bass drum, would be an improvement with the Compact.
Personally, I don't think the Compact lacks anything for vocals, guitars, or program music.
In my demoing experience though, keys could use a little added "richness", when compared to a big L1.
Or so the keyboard players felt...I thought the Compact did a great job, considering it's simplicity and ease.
Interesting note; I just got a call from Melissa @ tech support for Pro Acoustics USA (proacousticsusa.com), asking if I had any questions about my purchase of the SX21.
Obviously they are interested in how this is being used and if we had questions.
She said that they have had folks by a crossover not knowing what they were getting.

It's rare to find a supplier who has this kind of personal interaction, a good thing!
Hi Lou,

From the call I got from Pro Acoustics, it seems my unit just shipped, probably won't see it until later this week.

I have an outdoor gig that I was wanting to use 2 Compacts for, as I lost my van to a deer and can't haul much right now.
If it works out, I will bring 2 B1s to that one.

The ways I will test the SX21 at home is
1) taking the direct out of the Compact into the crossover, and then sending the Lo Out to the Packlite/2-B1,
2) Taking the T1 Main Out into the SX, splitting it there, sending the highs to the Compact and the lows to the B1s.

I'd prefer that option #1 work out, as that is the simplest.
Darn the timing!!

This morning I shipped out my TrapKat E-drum pad for repairs, forgetting that I was delaying sending it in until I tried out the Rolls crossover, and it showed up just after lunch.

So...I can't try it with my E-drums which was probably my #1 priority, but I will try it tonight with the Porchboard.

The SX11 is a pretty substantial feeling piece of micro-gear, like other Rolls devices.
Built like the typical tank.
The frequency control is a "smooth" type, no detente notches, handy or not, depending on your mood.
The only controls lacking, and I knew this up front, was a phase filter and Lo/Hi shelving controls.

It looks great so far...will let you know how it works out with the Compact and the L1 Extended Bass Package.
It Works Great!

Drum machine and Porchboard Bass - to T1 Tonematch mixer w/ Main Out to SX21 Main In.

Rolls SX21 Hi out to Compact, Lo Out to A1 Packlite amp & 2-B1s.

Ran Rolls X-over at lowest cut-off point of 50Hz and added bass from the A1/B1s...excellent.
Also ran the X-over at approximately the 400hz point that the Compact uses internally when on it's own.

Sounded different and still great...could probably allow the Compact a bit more headroom...not sure though.
Nothing technical here...just ears.
I'm impressed!

Edited - Bottom Line:

The Rolls allows you to have enough, or too much bass, if you want it.
Gain staging at the outputs of the SX11 is important.
To get too much bass, you need bass output up 75% to full on, and the Hi output at about noon.

Crossing over at @ 125hz sounded very good to my ears with MP3 program music.

I could not get the SX21's input to Peak with my T1...it's got headroom.


More to come when I get some time.
Over to you Roy!
Hey Everybody - I had 2 gigs today and got a last minute 3rd one so I didn't have a lot of time to work with it.

I agree with Drumr it makes a difference. I did a real basic test. Tracks straight from the laptop (MP3s) into the Compact, out of the compact to the rolls, to the A1 and 2 B1's.

I had to turn up the input and output on the rolls to get the gain I wanted. The input was clipping but not enough to cause any audio problem. Crossover between 250 and 375.

Looking forward to trying it with a T1.

2 B1's were better then 1. No brainer there.

All in all for the price and the size I think the Rolss is worth it. I don't know yet if I recomend going out and buying a A1 and B1's, if you don't have them already, and I am not sure if there is the punch some of you DJ's want. It is a nice fit between a Compact and a L1 when the compact is not enough and the L1 is to much. I am happy. Will let everyone know what it's like with the T1 when I get a chance.
Since I didn't have a crossover, I didn't think about using my 2 B1's with the compact.
Given the $299. cost for the Energy sub, with a crossover, phase and volume, I gave one a try.
It works out nicely with a L1 Compact to give my solo show a little more punch.
The phase control does make a big difference in getting the sound right.

Somehow I think if I was going to bring along 2 B1's, I would just as soon bring the whole Model II for the overall coverage.
quote:
Somehow I think if I was going to bring along 2 B1's, I would just as soon bring the whole Model II for the overall coverage

Yes Joel, that's kind of the conclusion I've come to.
More weight, but probably less set up time involved, considering the extra wiring of the crossover.