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 Post subject: DriveRack PX vs DriveRack PA
PostPosted: Thu Apr 10, 2008 1:31 pm 
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Joined: Thu Apr 10, 2008 6:02 am
Posts: 4
Hello,

I'm new to this forum, I've read the posts in the Welcome and Faq's section and tried a search, but I've yet to find any info on the DriveRack PX.

I did read the product info on the DBX website. Can anyone tell me if there are any posts on this forum about the PX? Is there post that compares the PX vs PA like the one contrasting the PA and the 260?

Maybe the PX is just to new to have a forum here yet.

Thanks for any info you have :)


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 Post subject:
PostPosted: Thu Apr 10, 2008 2:43 pm 
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Joined: Fri Feb 17, 2006 6:01 pm
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Location: Northern Minnesota
The PX is pretty much a DRPA with NO crossovers, only band pass filters. They added peak stop limiting . You can compare the \"features\" @ the DBX product site. It was designed for systems that use ONLY active speakers. It has 2 ins, and 4 outs, and comes with the measurement mic, the RTA M as a bundle.
Gadget

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There is no surer way to ruin a good discussion than to contaminate it with facts

I'm not an everlasting fountain of information but perhaps much more an unstoppable leak

2, BLOWN Galaxy Hotspots, with MCM audio select replacement drivers!


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 Post subject:
PostPosted: Fri Apr 11, 2008 4:02 am 
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Joined: Fri Dec 29, 2006 3:11 pm
Posts: 3307
\"with NO crossovers, only band pass filters\"


Huh? Maybe it's early or I have a fever and the only prescription is more cowbell, but aren't 2 overlapping bandpass filters a crossover? Please explain.

DRA

_________________
It's all fun and games... til someone looses an eye.


FOH:
A&H MixWiz3 16:2
DriveRack 260
QSC PLX3102 (2) - Yorkville Elite E12 (4)
QSC PLX3602 - Yorkville UCS1 (2)

Monitors:
Driverack PA (2)
Yorkville NX25P (2)

DJ rack:
Q-SpandII
Driverack PA


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 Post subject:
PostPosted: Fri Apr 11, 2008 4:38 am 
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Joined: Sun Oct 07, 2007 3:04 am
Posts: 217
Location: The Tops Australia
Greetings

Quote:
Please explain

The Answer only 2 way

ftp://ftp.dbxpro.com/pub/PDFs/Manuals/E ... 81023A.pdf

From Page 28 of manual

Quote:
The Filters are used to divide the input signal into two frequency bands. This allows the user to drive the speaker in its optimum frequency range and send each output separately for more efficient use of amplifier power. Appendix A.5 illustrates each of the available Filters. The signal present at the Main (OUT) outputs can be adjusted using a High-Pass filter. The signal present at the Subwoofer (SUB) outputs can be adjusted using Band Pass filters consisting of Low-Pass and High-Pass filters. When editing Filter parameters the frequency band is indicated by the highlighted OUT or SUB in the top left corner of the screen. The High-Pass or Low-Pass filter being edited is indicated by the highlighted edge in the graphics area.
For each High Pass filter there are three parameters:
Frequency
Adjusts the frequency of the High Pass filter from OUT (below 20Hz) to 20KHz.
Type
Selects the filter type. Selections are BW 6,12,18,24 for Butterworth type filter with slope of 6, 12, 18 or 24 dB/Octave and LR12, 24 for Linkwitz-Riley type with slope of 12 or 24 dB/Octave.
Gain
Sets the gain of the selected output band. (-INFdB to +20dB)
For each Low-Pass filter there are two parameters:
Frequency
Adjusts the frequency of the Low Pass filter from 20Hz to OUT (greater than 20kHz).
Type
Selects the filter type. Selections are BW 6,12,18,24 for Butterworth type filter with slope of 6, 12, 18 or 24 dB/Octave and LR12, 24 for Linkwitz-Riley type with slope of 12 or 24 dB/Octave.




page 16

Quote:
To edit the parameters of the high-pass and bandpass filter used in a selected preset, simply use the following procedure. From preset mode, press the SETUP button. Once you have reached the high-pass and bandpass filter module, navigate through the pages of the selected high-pass and bandpass filter module by pressing the \"Next Page\" or \"Prev Page\" buttons successively until arriving at the desired Page.


Mark

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If I hear, I forget; if I see, I remember; if I do, I will understand.


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 Post subject:
PostPosted: Fri Apr 11, 2008 4:55 am 
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Joined: Fri Dec 29, 2006 3:11 pm
Posts: 3307
Are you saying that if there are not at least 3 band divisions that a devise is technically not a \"cross-over\"? Seems very semantical.

DRA

_________________
It's all fun and games... til someone looses an eye.


FOH:
A&H MixWiz3 16:2
DriveRack 260
QSC PLX3102 (2) - Yorkville Elite E12 (4)
QSC PLX3602 - Yorkville UCS1 (2)

Monitors:
Driverack PA (2)
Yorkville NX25P (2)

DJ rack:
Q-SpandII
Driverack PA


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 Post subject:
PostPosted: Fri Apr 11, 2008 5:05 am 
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Joined: Sun Oct 07, 2007 3:04 am
Posts: 217
Location: The Tops Australia
sweatwater (USA site) has
dbx PX at $399.97
dbx PA at $499.97
dbx 260 at $999.97

The PX looks good for what it does for the price!

Mark

Quote:
Are you saying that if there are not at least 3 band divisions that a devise is technically not a \"cross-over\"? Seems very semantical.


What???
Sorry missing your thoughts on this one.

_________________
If I hear, I forget; if I see, I remember; if I do, I will understand.


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 Post subject:
PostPosted: Fri Apr 11, 2008 5:15 am 
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Joined: Sun Oct 07, 2007 3:04 am
Posts: 217
Location: The Tops Australia
Is the question:-

What is the difference between the

crossover section (dbx PA)

and a

High-Pass and Band-Pass Filter Section (dbx PX)

Which in a 2 x 2 setup is really doing the same thing the the input signal???

Mark

_________________
If I hear, I forget; if I see, I remember; if I do, I will understand.


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 Post subject:
PostPosted: Fri Apr 11, 2008 5:38 am 
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Joined: Fri Dec 29, 2006 3:11 pm
Posts: 3307
Right.

DRPA-
High out - HPF @ 100hz
Lo out - HPF @ 45hz LPF @ 100hz

DRPX-
High out - HPF @ 100hz
Lo out - HPF @ 45hz LPF @ 100hz

Gadget -
Quote:
The PX is pretty much a DRPA with NO crossovers, only band pass filters.


OK. I just looked at the PX and I'll still call it a cross-over, although (I suppose) it's by the truest definition is a device with filterable outputs. (Just like a cross-over) :roll:

DRA

_________________
It's all fun and games... til someone looses an eye.


FOH:
A&H MixWiz3 16:2
DriveRack 260
QSC PLX3102 (2) - Yorkville Elite E12 (4)
QSC PLX3602 - Yorkville UCS1 (2)

Monitors:
Driverack PA (2)
Yorkville NX25P (2)

DJ rack:
Q-SpandII
Driverack PA


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 Post subject:
PostPosted: Fri Apr 11, 2008 7:03 am 
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Joined: Fri Feb 17, 2006 6:01 pm
Posts: 4822
Location: Northern Minnesota
I was simply quoting DBX rhetoric.. When it came out I perused tha manual to see the differences and on page 6 the block diagram states specifically...\"High passed and Band passed filter section\" THAT is what i quoted, as you say Dra may just be a matter of semantics...I suspect that in this case since were talking about powered speakers, with specific crossovers built into them that we are bandpassing , and not cross..overing :lol:
G

_________________
There is no surer way to ruin a good discussion than to contaminate it with facts

I'm not an everlasting fountain of information but perhaps much more an unstoppable leak

2, BLOWN Galaxy Hotspots, with MCM audio select replacement drivers!


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 Post subject: Is the PX the 'BEST' choice for Powered Speakers?
PostPosted: Fri Apr 11, 2008 7:20 am 
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Joined: Thu Apr 10, 2008 6:02 am
Posts: 4
Thanks for the responses. This Forum is a great resource. Though I’ve used DBX equipment for a while, I had not visited their website nor stumbled across this user forum until a few days ago. Now that I’ve found it I plan to keep reading and making use of the wealth of info available here.

I currently have a DriveRack PA that I use regularly as my primary EQ for my sound system. I use the RTA for setup and have had very good results with it. This unit has become damaged and even though this will make me look like an idiot, I’ll go ahead and explain the damage.

The screen on the unit began to function somewhat erratically. Sometimes it would work fine and other times it would be completely blank. Ok, here’s where my stupidity comes in. When this problem first manifested itself, it was during setup for a live performance. When the screen refused to come ‘on’ I did the only thing I could think of, I tapped on it. Strangely enough, this worked and I was able to use the unit to complete my audio setup.

I know that I should have sent it in for service, but I just didn’t get around to it. I just tapped it whenever necessary. Now to my embarrassment, the screen has become detached and tilted in on one side. It does however work all the time now, LOL.

I plan to get another unit to use before sending this one in for service. Upon visiting the DBX website I learned of the DriveRack PX and that is my reason for the original questions in this thread.

The PX is to be designed for use with powered speakers, and since all of my speakers are powered, I wanted to investigate it further. I did think that it included a crossover since it has stereo or mono subwoofer support (sub outputs and band pass filters consisting of low pass and high pass filters). I am still reading and trying to understand the difference between this and an actual crossover.

If the PX would be a compromise in features that I need, then its not worth the few $$$ that it would save me. My first priority is high quality sound and simple (read fast) setup. We setup in a different location for each performance, mostly churches or small to medium size auditoriums and time is very limited. I must keep to a very quick but effective setup routine.

I’m going to go back and re-read the PX manual a second time to try and get a handle on the differences between it and the PA that I already own. On the DriveRack PX product page, DBX states, “ In another dbx industry first, we’ve created a processor specifically tailored for powered speakers”. My question is, “Will the PX be a more appropriate choice for a system with powered speakers than the PA, or even the 260?”

Thanks again for your help, you are appreciated

Richard


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 Post subject:
PostPosted: Fri Apr 11, 2008 12:08 pm 
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Joined: Fri Dec 29, 2006 3:11 pm
Posts: 3307
DBX manuals are always precise and concise, so always go with what they say. :wink: 8) :lol: :roll: :roll: :shock: :lol:

_________________
It's all fun and games... til someone looses an eye.


FOH:
A&H MixWiz3 16:2
DriveRack 260
QSC PLX3102 (2) - Yorkville Elite E12 (4)
QSC PLX3602 - Yorkville UCS1 (2)

Monitors:
Driverack PA (2)
Yorkville NX25P (2)

DJ rack:
Q-SpandII
Driverack PA


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 Post subject:
PostPosted: Fri Apr 11, 2008 1:09 pm 
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Joined: Fri Feb 17, 2006 6:01 pm
Posts: 4822
Location: Northern Minnesota
The DRPA and PX are not even in the same league as the 260... the 260 has TONS of more capability, and features. It's also QUIET... deathly quiet which in my book makes it the only way to go in a high volume setting, such as loud rock concerts. The 480 is better yet and the 4800 is truly amazing...but spendy.

I wish I knew if the PX had the hiss of the DRPA...If not it might truely be a better solution since it now sports the peak plus limiter. It has all the other features including all the different slopes that make a \"crossover\". I think that the whole flap here is simply a matter of the fact that this is a powered speaker controller, otherwise all the features of a 2x4 CROSSOVER are there.

Gadget

_________________
There is no surer way to ruin a good discussion than to contaminate it with facts

I'm not an everlasting fountain of information but perhaps much more an unstoppable leak

2, BLOWN Galaxy Hotspots, with MCM audio select replacement drivers!


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 Profile  
 
 Post subject:
PostPosted: Fri Apr 11, 2008 3:54 pm 
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Joined: Sun Oct 07, 2007 3:04 am
Posts: 217
Location: The Tops Australia
If you don’t need all the “bells and whistles” of the 260 than in my opinion the PX would be great, especially for the price.
You have

Stereo Feedback Elimination with 12 feedback notch filters
Dual 28-band Graphic EQ
Classic dbx® Compressor
120A Subharmonic Synthesizer
Stereo Multi-band Parametric EQ
Stereo PeakStopPlus™ Limiters
Pink Noise Generator
Auto-EQ with 28-Band RTA

dbx M2 Measurement Mic and zippered pouch included

You can sell the mic on ebay and recoup some more money, as you already have one)


How much would a Dual 28-band Graphic EQ cost you if you went with individual equipment ???
“Bang for you buck”, need a simple bit of gear, set and forget bit of gear, than I think it is worth it.
Get the dbx PA fixed and put it on your foldbacks!
Good luck
Keep us informed

PS
dbx PX at $399.97 - $99 for DBX RTA MIC (recoup on ebay) =

$299 That's cheep

_________________
If I hear, I forget; if I see, I remember; if I do, I will understand.


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 Post subject: One other difference
PostPosted: Wed May 21, 2008 1:04 pm 
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Joined: Tue May 20, 2008 10:35 am
Posts: 6
The DRPA allows you to unlink the graphic EQ's. I did not see this in the PX manual. The PX has almost all the bell's and wistles of the PA but was simplfied for powered stereo speaker set up. The set up wizard is not complicate by an additional pair of Mid outputs. PLug in your speaker type or custom, set your band pass filter and type, set level and delay if neccessary just for two sets of speakers.


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 Post subject:
PostPosted: Tue Sep 02, 2008 7:09 pm 
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Joined: Mon May 22, 2006 12:58 pm
Posts: 18
Location: Maine
DRPX is only a 2 way crossover (2 in 4 out) and has optimzed presets for active speakers. It also has no delay control for crossovers.

I suppose they did this as there are very few active folded horn subs
where you would need the delay.


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