rolls Tiny 2-Way Crossover (SX21)

I bought a single Behringer 208D powered speaker to go with my Vocopro Sub-1500 powered subwoofer for a simplified portable sound system to use at parties or other sound reinforcement gigs. The trouble was I didn't have a way to separate the signals to direct only the higher frequencies to the main speaker and the low frequencies to the sub. My sub has an adjustable crossover, but it still only passes on the full signal to the mains. Since the Behringer is rated as low as 60 hertz, there wasn't much low end frequency for the sub to handle. If I turned up the sub's crossover to bring out more bass, the overlapping frequencies muddied the sound.I didn't want to cart around a full size crossover, so I found this Rolls device during my web search. Since I am only running mono, I went with the mono only SX21 instead of the slightly higher priced stereo SX45 version. I run my DVD karaoke player into the Rolls' 1/4 mono input, then route the low 1/4 phono out to the RCA jacks on the back of my sub. The highs go to the Behringer using a mono to mono 1/4 inch unbalanced phono jack.The crossover has a wide range of frequencies from 50 hertz to 2.5 kilohertz, so the device would be useful as a crossover between a standard woofer and a midrange or tweeter in a bi-amp situation. I have mine set at 100 hertz, which is comparable to the crossover I had when I used my home theater amp with passive 8 inch two way Pyle speakers PADH879.I have yet to try this new setup at a live gig, but it does seem to sound better than before. I plan to do another test this weekend to hear what it sounds like at higher volume. It should be better than before now that the Behringer's woofer amplifier doesn't have to work as hard trying to hit the low notes that require so much power. I now have basically a 3 way speaker with a 15 inch woofer, and 8 inch woofer/midrange, and a 1.35 inch tweeter with a total power rating of nearly 400 watts (200 sub watts, 140 woofer, and 40 tweeter watts)Update: 11/17/2014Been using the simplified set up with the Rolls crossover a couple of times. Sounds very good with the frequencies split and the Behringer 208D getting only 100 hertz and above. This weekend I needed to expand my rig for two events: our ski club charity auction (music only) and a showing of this year's Warren Miller extreme ski film at a local banquet hall. The hall presented some challenges. I had to get the volume up to cover a larger area, yet it couldn't be so loud as to blast the people in the front rows. So I brought back my Panasonic SA-XR70 receiver and my Pyle PADH879 speakers on DJ stands to spread out the sound.Because my receiver has a second audio out, I routed that line level signal to the Behringer 208D that I placed on the Vocopro 15 inch sub I placed just in front of the stage. I was trying to use the Behringer 208D as kind of a center channel speaker; although I was running everything in MONO. I inserted the Rolls sx21 between the 2nd audio out and the Behringer; connecting it to the HIGH output on the rolls. There was nothing plugged into the LOW side, since the receiver was already sending 100 hertz to the sub and the rest to the Pyle speakers. I could then adjust the Rolls to whatever cutoff I wanted to get just the right frequency going to the Behringer. Being a powered speaker, I could also independently adjust the volume of the Behringer until the sound seamed to blend towards the center no matter where you sat for the movie.The results were very good. The sound was sufficiently loud, the bass you could feel, and yet the vocals were exceptionally clear. From further away the sound seemed to be coming from the entire stage area. The video was great too using my shower curtain 120 inch screen and Epson 710 HD projector hooked up to a Panasonic upscaling blu-ray player. Some of the people who had recently seen the same film at the Pabst Theater in downtown Milwaukee thought mine sounded just as good; and they were floored to find out how I made the screen out of a frosted shower curtain.The results were good enough that I decided not to get rid of the Pyle speakers. It's a hassle pulling out the receiver from my entertainment center and cart it off to a gig, but the set up worked so well and I do it so rarely that I might as well use it until I break it.

This item totally does what I need it to do. I love everything about it except the DC power plug input can easily fall out. I would give this product a 100 percent rating, if the DC input plug snapped in or something.

Does what it intends at a fantastic price. Remember THIS IS A MONO CROSSOVER. Do not buy this for STEREO (LEFT RIGHT) AUDIO. There is a more expensive one available for that. This separates the bass and treble for my PA system without interference or fuzz. Great product. Thank you Rolls!

Did not separate the frequencies very well

This is a simple, inexpensive, and well-built crossover by the Rolls folks, who just seem to do things right.I'd been searching for a device like this for a few years, but found nothing.I wanted to add some more bottom end to my Bose L1 Compact line array sound system.This fills the bill quite well, thanks to Pro Acoustics for the great deal and follow up service!The only features it does NOT have are a phase reversal knob, or Lo/Hi shelving switches.But it still works really well for what I wanted, and it's a steal at the price I paid.It is easy to use, quiet in operation, and does not seem to color the sound.I highly recommend this for Compact users looking for more bass.L1 users, here is how I set it up:Bose T1 (digital mixer) Main Out to Rolls Line INputRolls High OUTput into Bose Compact Channel 2.Rolls Low OUTput into Bose A1 Packlite Amplifer and into a pair of Bose B2 subs.Rolls input set at noon-2 position, set crossover where you like it, for your use, and adjust hi/low outputs to taste.Simple.

I've been working on my bass tone and really needed to separate my low fundamentals and the rest of my sound. So, I split my frequencies around 220hz (roughly, it's a dial - I'm not worried about specifics here) and I run the lows to a compressor and a Fender Bassman 100, jumpered so I can get a bit more grit on the low end. Then I run the rest through my guitar pedal board (minus reverb) and in to an OR50 and I have it set at a slightly gainy sound and it's just the sound I need.

Really simplw, fast and effective, with high quality connections and exclosure,will work with 9 up to 15 Volt!!!!

I'm using the product in a large biamped rig consisting of a bergantino 322 top and Carvin 18 bottom. It produces no noticeable hiss with plenty of headroom. Sweeping the crossover point, I do not notice a significant change in tone (aside from the frequency moving from cabinet to cabinet), so there do not appear to be massive phase problems at the crossover frequency.The only negative: wall wart. Also, inputs and outputs are unbalanced, so that may be an issue for pro applications.All in all, it's a good (tiny!) crossover for cheap.[update 2013]Have been using one of these to cross over a subwoofer with a bose stick PA system for over a year now. Works great. Sometimes I wish it had more output gain. Otherwise it is inaudible and works nicely. The input clip light is helpful.