PX with QSC hpr 153i and 181i

Unknown

Hello,
I recently bought the PX and have played with it extensively. So I have two QSC 153i and two QSC 181i powered speakers.

153 specs:

Frequency Response (-10 dB) 36 Hz - 20 kHz
Frequency Range (-3 dB) 41 Hz - 17.5 kHz

Input headroom/clipping: 10 Vrms (+22.2dBu)

181 specs:

Frequency Response (-10 dB) 39 Hz - 145 Hz
Frequency Range (-3 dB) 1 45 Hz - 95 Hz
Input headroom/clipping: 10 Vrms (+22.2dBu)


I have read the readmefirst sections, but want some help setting my crossover points. What should I use for this system BW, or LR filter? What should the slope be for the subs and the tops?

Also, how do I help the internal limiter in the qsc? At what level do I set the px limiter? or does that depend on my gain structure? I own this sound system mostly as a hobby, so Im no where near a proffessional, but would like to know how to get the most out of my equipment.

Is is a good idea to use the upper band of the sub synth with my subs?

Thanks!

Dra

How much power do the tops and subs have?

DRA

Unknown

The tops are 600 watts (triamped w/internal crossover) 400 bass, 100 mid, 100 high.

The subs are 700 watts mono.

Does that help?

Gadget

I don't know, I'd do some testing, but I'd probably start out with a LR 24 100hz xover with a BW 18 hipass @40 hz that lets the subs do their thing, and the tops do theirs...I might try and set a slight (few hz) split @ the crossover point... whatever the PX allows.. I think 10 hz or so to minimize xover interaction...Heck try it both ways... it's so darn easy!...read my PX first use.. some thoughts...It might help

G

bruger

sfk....How does the preset for the 153i sound? I have the same setup as you, but am not satisfied with all the interaction between the sub and top.
I think the top could use more \"sizzle\" as well.

Gadget

Good luck getting a response.. he didn't register.. and that was almost 4 months ago...

Tell us what settings you used, all your equipment and what you use the system for.. sizzle is a feedback looking to to happen.. but tell us what your reasons are...

G

bruger

I have not bought a PX yet.

Signal chain consists of MixWiz-dbx 2231EQ-HPR 181i-HPR153i (1 per side) System is used for bar bands in 200max cap rooms. Vox could use more clarity, no matter the mic. This is esp noticable in area of enounciation (last 8va response of hf horn) Also, it's hard to get any click from the kick drum, no matter what the drum or mic is. I've used D112, D-6, B52...none really have it.

There also seems tp be too much mud in the Low mid area around the xover point. This most likely is due to interaction between the 15\" of the top and the 18\" of the sub when ground stacked.

Also, I see in the literature of the PX, that it lists the HPR 153i, as a supported perset, but it's not on the list in the manual. What's up with that? Is there a preset or not?

I'm thinking that maybe the PX is the ticket to help clean up the rig a bit, but I'm looking for feed back from other users.

Gadget

Too bad your not in the NW corner of Wisc...you could come up and experience the real power of the Driverack...I will say that the Driverack (whatever model.. I have the PX, DRPA, 240, 260, and 4800) and they have all made major improvements to ANY system I have put them on...

There must be any number of places you can go and audition a Driverack...Any place worth their salt should let you demo one on your rig. Note that the higher you get up the food chain the more tools you'll have and the better your sound quality will be. I think you would be paricularly impressed with the difference a PEQ makes over a GEQ.. and the Auto EQ sequence will let you know where your speakers are not flat, and then you can use the PEQ's to fix the problems, AND add that sizzle your looking for! I promise you no GEQ will do that..not even KT, or BSS...

Note that the PX does not have ANY alignment delay...The DRPA has minimal, and the 260 is clearly a professional piece with all the bells and whistles...You'll never be sorry you got the 260 I know I stepped up the minute the 260 came out. Ya it's about $700 shipped, but you get so much more for the system and it really sounds better as well.
Gadget

bruger

Umm, I guess I should've mentioned that this system I'm refering to is my B rig. I don't even run it much myself (got another guy) and I really just got it off the ground this summer. My A rig, which is 6xYorkville U15+subs rig, employs a DR260. Soooo, yer preachin ta the choir about the driverack.

I'd like to keep the powered system simple. The PX would be a good fit IF it indeed HAS THE PRESET for the HPR 153i.

tartan

I have a very similar setup, that I set up for the first time this week.

Yamaha MGX -stereo-> DriveRack PX -stereo-> QSC HPR153i

I used the built-in PX setting for the 153i, pinked for balance and eq, played a couple CDs, and called it a night. Acoustic music was VERY clear, crisp, and punchy.

However, before the auto eq, it was really boomy in the mids. The room is long and perfectly rectangular , but that's what I have to deal with.

I have two subs, the QSC HPR181i, en route right now. I have a decision to make: let the PX control the mains and subs separately, or use the 100Hz LC filter built into the 181i outputs. Actually, the 153i also has a switchable 100Hz LC on the input; I'd obviously NOT use both the sub output LC and mains input LC simultaneously.

The QSC documentation (http://media.qscaudio.com/pdfs/manuals/HPRi_user_manual_revC.pdf) doesn't tell me what type filter this LC is.

For ease of setup (since I don't work for the people who bought this, and since they'll be taking it up and down every so often), I'm inclined to use the built-in QSC filter.

However, I know these people will only ever use the auto setup functions in the PX, so it may make sense to give the PX direct control of the subs for the sake of balance. Then again, the input sensitivity is identical between the 153i and 181i. (I may be understanding this last point incorrectly. Feel free to slap me.)

Does anyone know what filters the PX is using for its programmed auto-setting for the HPR 153i? The only thing I know is that the PX wants the 153i's input attenuator set to 9:30 (-15 dB) initially.

Gadget

I would certainly run everything out of the DRPA.. regardless of the crossover type it uses.. I have one but it's not here.. I can find out but probably not till next Thursday...The point is that with propagation delay in the crossovers, you will end up with alignment problems.. time wise. Plus the PX will be invaluable in controlling the subs as well.. what with the PEQ's available. and all...

gadget

tartan

Gadget wrote:

I would certainly run everything out of the DRPA.. regardless of the crossover type it uses.. I have one but it's not here.. I can find out but probably not till next Thursday...The point is that with propagation delay in the crossovers, you will end up with alignment problems.. time wise. Plus the PX will be invaluable in controlling the subs as well.. what with the PEQ's available. and all...

gadget

doh! The PEQs alone are enough of a reason -- I hadn't even thought about that.

Thanks!

josh

JohnLutz

So.....

What wizard setting should I use for the QSC 181i subs?

John

Dra

For all speakers or amps \"not in the list\", you select custom. You could go to the trouble of looking up every speaker or amp and find a spec match and use that if you wish. Wizard settings should be taken with a grain of salt, regardless.

DRA

Gadget

As Dra said, and remember that a fullrange speaker doesn't need a crossover so there will only be a blank slate set up for use...sometimes a hipass will be specified,, but that about it..

I would assume that the sub has a built in lo-pass, and Hi-pass ...what Are they? Don't they specify a slope for the lopass? In db/octave if nothing else?

The 'Read ME First Before Posting' section has lots of answers and tips...
Gadget