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DBX Driverack PA Manual

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DBX Driverack PA Complete Equalization

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DBX Driverack PADBX DriveRack PA+ 2x6 PA Complete Loudspeaker Management System
Although the DriveRack PA+ is loaded with functions and features, it is easy to set-up and use. The dbx exclusive Set Up Wizards walk you through system set up with easy to follow step-by-step instructions. Just pick your speakers and amps from the built-in list on the PA+ and then let the Auto Level Wizard fine tune the level settings of each speaker. You can then let the Auto EQ Wizard help you further optimize your sound. Finish up by using the AFS Wizard, which automatically sets filters to ... Read more

Brand: DBX
UPC: 0691991401152, 691991401152
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Video review

dbx DriveRack PA EQ & Loudspeaker Control System


User reviews and opinions

Comments to date: 7. Page 1 of 1. Average Rating:
purbeck 1:02am on Wednesday, October 20th, 2010 
clarinet stand A well designed, well engineered product at a good price. Very stable, easy to fold and portable. Had to return this product Firstly, you must have access to the internet to unlock this item and you have to be computer competant to install.
Faith 6:53am on Friday, August 13th, 2010 
As soon as I recieved this, I simply loaded the drivers, plugged it in, and it worked PERFECTLY. Pretty durable, too...
ocascante 2:04pm on Saturday, July 24th, 2010 
Good quality but... For a cheap desk top/piano top mic stand, this is great. The quality of construction is very sturdy and solid.
tenchi83 1:44am on Sunday, July 11th, 2010 
I received this multi-tool for free through a promotion, and I can say that it has exceeded my expectations for a free tool.
ilovegb 11:17pm on Wednesday, June 30th, 2010 
Worked OK for me Installing to a Windows 7 (32 bit) PC - so I ignored the product CD and downloaded the beta Win 7 drivers.
chantszyeung 3:14pm on Wednesday, March 31st, 2010 
Fast Track Pro has all the resources and mobility of the Fast Track USB recording and even more capacity.
Malbase 5:59pm on Tuesday, March 30th, 2010 
dont spill rum and coke on them Rocks parties well Not easy to use Set up is easy, be sure to check the m-audio website for the current drivers. IMPORTANT!

Comments posted on are solely the views and opinions of the people posting them and do not necessarily reflect the views or opinions of us.




dbx DriveRack 260 vs DriveRack PA
The DriveRack 260 is more configurable than the DriveRack PA. You can run the inputs or any of the outputs independently. The DriveRack PA always sees the outputs as stereo (tied) pairs (with the exception of the low outputs which can be summed to a single mono output). The inputs can either be fed from a stereo source or a single mono feed, but the DriveRack PA is not capable of summing the inputs to mono or operating as a dual mono processor. The only thing that can be unlinked in the DriveRack PA is the Graphic EQ on the input stage. The 260 also has: 1. Polarity inverse and phase adjustments. 2. Real time RTA. The DriveRack PAs RTA can only be used when running the Auto EQ Wizard and cannot be used as a stand alone real time analyzer. 3. A relay on the power supply (helps prevent power up/down spikes). 4. Three levels of security. The DriveRack PA has only a front panel lockout. 5. Longer delay times (up to 2.7 seconds total). The DriveRack PA has only 10 ms of delay per pair of outputs (suitable for driver alignment). 6. 4 band PEQ on every output (DriveRack PA has 2 band-Lows 2 band-Mids and 3 band-Highs). 7. Ability to be controlled and backed up with a computer using the DriveWare GUI (compatible with Windows based PCs only). 8. Ability to be controlled using the DBX Zone Controllers (ZCs 1-4). 9. User selectable inserts. 10. Output mute buttons. 11. Input mixer. 12. AGC (Automatic Gain Control), Notch Filter and Gate processors available as input inserts (AGC is also available on the output stage in place of the Limiter). 13. Capable of 1x4 (4-band), 1x5 (5-band) & 1x6 (6-band) configurations. The DriveRack PA only supports configurations up to a 1x6 (mono/3-band, outputs stereo tied) or 2x6 (stereo/ 3-band, outputs stereo tied). 14. The DriveRack 260 has ATTACK, RELEASE and HOLD controls for the compressor section and the DriveRack PA does not (the DriveRack PA has THRESHOLD, GAIN, OVEREASY and RATIO controls only and the attack and release settings are program dependent).
Note: Before deciding which DriveRack to purchase, please contact your speaker manufacturer. If you need a low pass filter for the high outputs, more than a 2 band parametric EQ for the low and mid driver tunings and/or phase adjustment control, the DriveRack 260 is highly recommended over the DriveRack PA. The DriveRack PA is well suited for many DJ/small club applications, but for bigger systems and/or permanent installations (such as churches) the DriveRack 260 is usually a better option.


DBX DriveRack 260 Setup Guide
This thread is about how to setup and configure an active crossover and speaker processor solution for Martin-Logans. The unit we will focus on is the DBX DriveRack 260, widely recognized as an amazing value in pro-audio and DIY Audio circles. I wont go into too much detail about the DR 260, instead will point you the info on DBXs site. However, since our application is a bit non-standard, there are a couple of things Ill say about the Drive Racks here in the context of a high-end audio setup.
What is a speaker processor?
In our context it is a device that provides all of the tools needed to be able to perform cross-over duties as well as correct, align and set up your speaker in your particular room. These tools are all in one box and generally have clean, computer based user interfaces to manage the many settings. In years past, this would have been a collection of three or four boxes, all doing their work in the analog domain. Today, its all integrated in one box and all processing is done by powerful DSPs. For our purposes, we are interested in its ability to provide sophisticated crossover solutions. It can do two-way or three-way stereo. It can also do two-way stereo and a summed low-frequency output. The crossover types and slopes are all selectable, with full support of high-order crossovers (up to 24db/Octave). This allows us to have some clean cutoffs between woofer and panels if desired. Additionally, these devices are sophisticated parametric equalizers, with EQ on both the inputs and for each individual output. This allows exact corrections for each driver in the system as well as overall tonal balance or room driven adjustments. One of the most important tools is very granular time and phase controls. As timealigning drivers within a speaker is critical, as is time and phase aligning speakers to each other. Finally, it provides gain (volume) management on each input and output to ensure we have the correct volume balance across the speaker.
Here are some example conceptual configurations; 2-Way This is the typical 2-way crossover with a high pass filter sending high frequencies to the ESL and the low-pass sending bass to the woofer. This would be what youd use for straight-up replacement of the factory passive twoway
Three-Way Crossover This is a mode used when you have twin subwoofers and a strictly 2-Ch system. It allows you to set delays, adjust phase and EQ for each of the subs independently. For people doing full bass management and summing the outputs of all 5 channels, this is also the standard mode to use (or the 2x5 below). It does require an external mixer to sum the bass outputs of the 6 channels (L/C/R/Ls/Rs plus we need to add LFE) before feeding the sub
Three-way with Bass summing This is a 3-way crossover in which the low-frequencies are summed to mono and output one of the jacks ready to feed your subwoofer. Use this only if you are able to sum inputs on the sub (rare) or if its strictly a 2-CH source system. The setup is similar to the 2-way, but the woofer crossover is a bandpass (typically 60 or 80Hz to 250hz), and we add a lowpass filter for the sub woofer This mode is used as a simplified version of the 2x6, in which at least the L/R sub outputs are summed in the DR-260 before sending to the sub mixer (or the sub in a 2.1 config)

What you will need to successfully deploy a modern speaker processor is listed here. There are no shortcuts, so be prepared to acquire both the devices and the knowledge needed to best make use of them, although hopefully this guide will speed up the later. Measuring software: PCs:
Acoustisoft R+D / ETF About $150 for base, $300 with all options. Room Eq Wizard - REW Mac Software: FuzzMeasure Pro 2, only $125 All of the above require a calibrated microphone and an appropriate sound system for your PC/Mac. Figure on spending anywhere from $200 to $1,000 for mic and preamp. Here is a good discussion and recommendation guide for hardware (this applies to all the software listed above)

Level matching

Next, these are pro-audio devices, and therefore have balanced audio ins at pro-audio levels. Either your pre-pro has balanced outs or you will need to gain and impedance match them. Topic one will be how to hook up the DR to your existing system A bullet-proof approach is to use a Jensen transformers ISO-Max DM2-2xx Typically, you would order the DM2-2RX (RCA in, XLR out). Make sure you call them to ensure you get the right flavor of Consumer to Pro level model with the right input (RCA) and output (XLR) connectors. These are not cheap at around $190, but they are the best.
For more info than youd ever want on Balanced line technology, see: And this helpful note from Rane:
A lower cost and very effective (but only for woofers) is the active electronic line balanced system from ART, the CleanBox. But make sure you also apply this mod listed at HomeTheaterShack if you plan to use <30hz outputs from them (by default they filter <30Hz content, but theres a simple mod on the link) A bargain at $55, it not only converts from consumer to pro, it also includes gain control and will convert back to consumer in the same package, which is ideal if you amps either do not have gain control, or have line-level inputs. Another option is: [Discuss Gain management into and out of the DR260 ]

Physical Setup

We will keep it simple for now and describe a straightforward 2-way crossover install to replace the passive crossover of a Monolith. I picked the Monolith for two reasons, one I have a set and two, they have external crossovers that can be disconnected in minutes. Ive posted threads about how to bypass internal crossovers on the Martin Logan Owners Forum. Step one is to make sure you have enough amps, you do have four channels of amplification, right? Good, Ill use two stereo amps as an example, first is a Sunfire stereo with balanced inputs and a solid 400 wpc into 4 Ohms of an ESL, so it will drive the panels. The other will be an Adcom GFA555 II, an old war-horse of a solid state amp with 200wpc well use to drive the woofers with. The GFA only has unbalanced (RCA cinch) inputs and no gain controls. Cabling is critical (and more complex) so careful planning is required. Which means make sure the cables match your equipments needs (and not just what I happen to list here). Assuming we have a regular pre-amp put from a processor or 2ch preamp with unbalanced RCA cinch connectors, we know what we are starting with.
Next is the unbalanced to balanced converter, it will have RCA cinch inputs as well. So a male-male RCA cable per channel is required. You likely already have that as thats what feed the amp from your pre-amp. Just use that. The converter will have XLR balanced outputs, typically requiring an XLR-Female end for cable-end. The inputs the DriveRack are females, the cable end required is an XLRMale. Order a pair of XLR-F / XLR-M cables of the appropriate length. Weve now fed the Drive rack with L/R balanced level signals. To take the high frequency outputs of the DriveRack and feed the Sunfire, which also has balanced inputs, well use XLR-F to XLR-M cables for each channel and be done with that. To feed the low-frequency amp, we will need an adaptor, as we will be going from balanced to unbalanced. For the purposes of this sample, well assume we used an ART CleanBox as our converter, as it has a nice feature that allows reconverting balanced to unbalanced. Although its quality (and bass roll-off below 30Hz, only make it appropriate for a woofer, not a panel or sub). For panels, use another Jensen. Therefore well need a total of four additional cables for this. First a Balanced XLR-F to XLR-M to feed the Art CleanBox, followed by standard male to male RCAs to feed the GFA.


Technical specifications

Full description

Although the DriveRack PA+ is loaded with functions and features, it is easy to set-up and use. The dbx exclusive Set Up Wizards walk you through system set up with easy to follow step-by-step instructions. Just pick your speakers and amps from the built-in list on the PA+ and then let the Auto Level Wizard fine tune the level settings of each speaker. You can then let the Auto EQ Wizard help you further optimize your sound. Finish up by using the AFS Wizard, which automatically sets filters to eliminate any feedback during performances.



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