Wim M

Hey Maarten, I’ve seen several xp4080s on 2ehands, and it appears there ‘s little interest in them. Wim

What fans do you use as replacements? We use 2 QSC DCA series amps and are looking for replacement fans which are a bit more quiet.

Glad to hear you finally got things running! I'd suggest trying different X-over points, slopes, delays, cut off your mains, etc... I'm sure you'll find a setting which will put a big smile on your face.

If I'm not mistaken, I believe he said he uses 48 dB slopes.

Jason, I think I'm not completely getting this. If you high pass your La Scalas at 200, and lowpass your THTLP at 45, what do you use in the 45-200Hz range?

Both please

You 're probably right. It just sounded fun building those extra bass cabs, the only thing I'm missing right now are the passive radiators. In our region you can often hear those JBL drivers in PA applications, and I really love the sound of those 18s, that's why I bought them in the first place. Could you expand this a bit please?

Is it because I'm going to put a direct radiator in between two horns?

Currently we are running a pair of La Scala IIs combined with a pair of Tuba HTLPs (big thanks goes to @jason str) The LSIIs are bi-amped, time aligned and EQed flat (with the enormous appreciated help of @Chris A) Two years ago I did a DIY project with a pair of 18 "JBL 2242 drivers (specs) which didn't work out very well. The major problem was that I didn't realize the JBLs are bass drivers, and actually not usable for sub applications in a bass reflex cab, where they have problems to keep up with the high efficiency of Klipsch speakers. Also, at that time, I didn't have the proper DSP and amplification. Now I have a Xilica XP 4080, with 2 unused outputs, and a spare QSC DCA series amp. The JBL 2242s are on a shelf in our basement in their original packaging, and I want to put them to use. Klipsch made the KP 480 a number of years ago, a bass cab loaded with an active 18" and a passive 15". They were to go with the industrial La Scalas. So I came with the idea of building a pair of bass cabs in the style of the KP 480, each loaded with a JBL 2242 and a Dayton Audio 18" passive radiator (specs) The bass cabs should have the same footprint as our LSIIs, so the bass cabs can be put under each LSII. Height should be minimum so that the top cab of the LSII is not raised too high. This will give a net internal volume of around 5,8 cu ft. The PR can fire backwards into a corner. I will let the bass cab handle the 40 - 120 Hz region, below 40 Hz can be done with our Tubas. Great idea or a definite no go? Thanks in advance for sharing your thoughts with me!

I have my LSIIs high passed and Tubas low passed all at 55 Hz. To my ears slopes of 48 dB sounded best, I could see this also in the measurements I did when determining delays. 48 dB provided the smoothest response in the critical crossover region, as @jason str already mentioned. Speaking of delays: also an important factor to let a sub blend well with your mains.

Parasound is indeed a fine choice, certainly with RF 7s, I know from experience. If you really want to add a sub, my vote would lean towards a pair of Klipsch R115 SWs. When you decide to go with a Parasound Halo Integrated you can have your mains cut off somewhere in the 50 - 60 Hz region (the Parasound has a built in crossover). Then you can let the subs handle everything below this freq. I'm sure this will be an impressive combo!

This year I want to replace my Parasound P5 pre amp and introduce some tubes. I 've already been looking at a Mcintosh C 2600. I read that Klipsch and Mac has always been a magical match. Also there is the Cary Audio SLP-05, which Klipsch now is using to demo the Heritage line at CES 2018. I think both the Mac and the Cary are in the same price range. I guess that auditioning these two will be not be possible here in Belgium, so I will have to do it with what I find on the net.

Added another QSC DCA series power amp to bi amp our LSIIs. Definitely another step in the right direction. The Parasound A21 powers the bass bin of the LaScala II, the QSC the top cab.

I only know about the Cambridge 851 series, so I can only comment on this one. I choose the 851 series because it has that typical 'British Sound' tuning, this makes that it has a slight tendency to sound a bit smoother on mids and highs, but without loss of resolution. Which I think is an important feature when pairing it with horn loaded speakers. Hope this helps...

The P5 is a fine choice. If you want to take a step up the Cambridge Audio 851 series are an excellent choice as well.

Normally a La Scala has plenty of bass, when in good condition. The only thing is that they stop at 50 Hz (or a bit lower of you place them in a corner) Maybe this is what you experience as 'very little bass'. Lots of people say this when they hear tight, fast, correct and undistorted bass for the first time. You can always add one or more subwoofers to fill in the gap below 50Hz. As already said above, almost every speaker sounds better when pairing them with one or multiple subwoofers. Just keep in mind that you will need very potent subs to keep up with the efficiency of the La Scalas. Please, do not try to squeeze, say 25 Hz, out of a La Scala by using powerful amps and/or EQ. A La Scala simply won't do 25 Hz and It is most likely that you will fry the woofer trying to do this.

I did a test with the dbx Driverack Venu360. To my ears it sounded like somebody put a veil over the speakers, foggy. Definitely lost clarity. So I went for the Xilica instead, which sounds christal clear.

Where is this going to be? I wanna hear this myself! Any idea yet which bands will be on stage?

The sub goes down all the way to the floor, the driver is at the bottom of the cab and fires to the ceiling. The cabinet in front of the sub is U-shaped and is slided over the sub. Here's a pic of the other Tuba HT. The cabinet in front is made a bit larger than the sub, so that there is 1/2inch space between the two.

Belgium is known for its chocolat and special beer, but as you say, we have always had a great tradition in motocross too. (and there is also a little guy building big subs, LOL) We have some nice tracks, most of them on heavy clay ground. And when it rains, and believe me it does a lot, things get dirty and messy. Spectacular to watch, but I guess pilots as well as equipment have a hard time.

I remember going to the motocross with my father. Me as a 10 year old kid with my Roger De Coster T-shirt on! Shouting to Roger on his Suzuki.

With this same sentence, it all started 10 months ago. It ended with something like this La Scala IIs paired with 2 TubaHTs

That's probably a mistake I made: I didn't break in the drivers. Right out of the box and into the subs.

Maarten, Think of it this way: if jou want to build a nice house, you need a strong foundation. Well, the Xilica is part of that foundation, you want it to be right from the first time. It's okay to wait a while to get the money saved, I guess that's what most of us do. As we say in Belgium: "Rome wasn't built in a day" Wim

Tubas are finally up and running.