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IPR bass has more balls than XTi bass. Yes, that's right. Balls. I don't know how to quantify it any other way.
Go searching on the internets and you'll find it's a widely held opinion that XTi's are not good for subs.

I've been using XTi's for my T39s since 2007. Before that, I was using a Tapco J-1400 BRIDGED! My XTi's have never failed me. I do not play Dub/Electronic music. Top 40, Oldies, Motown, classic rock, country. Whatever the folks standing in front of me want to dance to.

This is a very interesting discussion.

I have used the XTI 4000 with 1,2,3, and 4 cab setups. Content was all live music but some bands have synths that go lower than my rig and hard. My findings( non scientific) are 2 cabs per channel can run smoothly all night. The lower and louder the more breathing I hear from the amp. I have also noticed XTI's don't like dirty power. Digital distortion from low amperage sounds horrible. If Peavey has figured out how to compensate for dirty power I am all ears until then old iron still has worth. I personally like to carry light.

If anyone gets an IPR 3000 with dsp please let us know how it holds up.

LEVLHED wrote:IPR bass has more balls than XTi bass. Yes, that's right. Balls. I don't know how to quantify it any other way.
Go searching on the internets and you'll find it's a widely held opinion that XTi's are not good for subs.

"Balls" is a subjective term. I'm not here to argue but being the data-driven person I am and given all things being equal, (Voltage, EQ, THD) I don't see (or hear) how the sound could be any different. There are also many forums around with people who have done a/b blind listening tests who heard no difference. I'm well aware of clean power being an issue with the XTI however, I don't play anywhere that doesn't have sufficient power, so in my case it's moot.

FWIW I've also powered my same subs on an old iron Crest 8001 that I have from the late 80's and heard no difference buy my back sure felt it after moving that sucker!

My understanding is the difference is in the way the power supplies do their job.
I do not have the tools necessary to satisfy your need for numbers. All I can offer is my subjective balls.

LEVLHED wrote:My understanding is the difference is in the way the power supplies do their job.
I do not have the tools necessary to satisfy your need for numbers. All I can offer is my subjective balls.

LEVLHED wrote:My understanding is the difference is in the way the power supplies do their job.
I do not have the tools necessary to satisfy your need for numbers. All I can offer is my subjective balls.

Is that like Rocky Mountain oysters?

DJPhatman wrote:

Mikey wrote:I just took a closer look at the IPR-DSPs' features, and one important thing that I noticed was that you can use the EQs without the need for a laptop (unlike the XTis). This may be a moot point for some, but very important to others. For instance ... bass guitar > preamp > IPR DSP ... fully functional biamped bass rig.

You do not need a laptop/computer/USB control for the XTi, it's just easier & more convenient, for me, to control them. You can access everything by the front panel, just not as easy.

BTW, your bass rig example can be done be done with an XTi. You can set your crossovers and base line EQ by computer via USB, then use the preamp EQ to make on-the-fly adjustments. I'm not bashing the Peavey or the Yamaha, it's just some folks on here think, and comment that the XTi can only be controlled via USB, and that simply is not true.

I read your response yesterday, but didn't have the time to properly respond.

From the XTi manual:

"you can configure up to15 USER PRESETS with your
own settings. When you power off and back on, your settings
will be as they were when you shut off the amplifier.
However, if you recall a user preset, all its DSP will be off --
unless you had saved the preset using System Architect
software (a free download from http://www.harmanpro.com). Any
custom settings can’t be saved by the front panel display,
only by System Architect software."

"XOV (Crossover): The available crossover frequencies
are: OFF, 90 Hz, 100 Hz, 1200 Hz, 1500 Hz, 2000 Hz, 2 ch.
sub, custom.
When you call up the XOV process from the front
panel, Ch.1 will always be set to low frequencies
and Ch. 2 will always be set to high frequencies.
DO NOT con nect high-frequency drivers to Ch. 1.
You can configure both channels to pass the same
frequencies using System Architect software and
a USB cable from computer to amplifier."

"EQ (Equalization for Ch. 1 or Ch. 2): The options are
IN or OUT. When set to “IN”, equalization that you set up in
System Architect software is applied to the signal. When
set to “OUT”, equalization is bypassed."

These are pretty important functions which, IMO, should be somehow available/doable via the LCD screen, even if it takes a bit of tap dancing to get there. What if "shit happens" at a gig and access to puter-only functions are needed? Don't get me wrong; the XTis have incredible features and have proven to be worth their weight in gold, but it just seems odd that Crown hasn't allowed full access to all of the features on-board.

Then again, maybe I'm living in the dark ages. It DOES seem that computerization is quickly working it's way into the working musician's "every day" gear. Perhaps my old school thinking is somewhat ignorant.

And that is exactly why I prefer a driverack and amps with no dsp. I can save every location that we play (with no computer) and recall it at the touch of a button for faster setup.

By the time you add the extra price of two or three amps with DSP, you can just about buy a driverack.

I guess if you run with a single amp - set it and forget it - all the time, the DSP would win out. But I just don't see it with multiple amps in play every time you set up.

Ant through your own quotes from the XTi manuals, it said the only function you need the computer for is saving presets.

DJPhatman wrote:BTW, your bass rig example can be done be done with an XTi. You can set your crossovers and base line EQ by computer via USB, then use the preamp EQ to make on-the-fly adjustments.

Re-read my quote. Why would you want to change the crossover point in the middle of a gig? Set it and save it, then fine tune for the room/stage/venue. On my XTi, the second quote is not true. Only the factory presets are locked as Ch. 1 for lows and Ch. 2 as highs. Since I brought a computer to every gig (it contains all of my music) I had a computer there. But I never used it. Once I had everything set up, I only used the EQ available on the mixer for room correction.

Bruce Weldy wrote:And that is exactly why I prefer a driverack and amps with no dsp. I can save every location that we play (with no computer) and recall it at the touch of a button for faster setup.
By the time you add the extra price of two or three amps with DSP, you can just about buy a driverack.
I guess if you run with a single amp - set it and forget it - all the time, the DSP would win out. But I just don't see it with multiple amps in play every time you set up.

I run with, at most, 2 amps. The extra cost of the DSP does not even come close to the cost of a used Driverack. Most users on the forum are probably only using a single amp (2 tops, 2 subs). This is more about convenience and what you are used to, than which is better. The best bang-for-buck DSP is the Behringer combo, hands down. The Crown amps with built in DSP is hands down the best amp with built-in DSP. A lot of users like the dBx Driveracks because of the proven performance. Choose what works for your particular situation.

I have had the IPR 1600 and 3000 for over a year now. I have had no trouble with either. We use ours for both band(classic rock) and DJ work. The IPR 3000 powers 4 - 3015lf loaded subs. We have always had plenty of bass.

Hope this helps.
Mike

mike james wrote:I have had the IPR 1600 and 3000 for over a year now. I have had no trouble with either. We use ours for both band(classic rock) and DJ work. The IPR 3000 powers 4 - 3015lf loaded subs. We have always had plenty of bass.

Hope this helps.
Mike

Helps a lot. Do you think the ipr1600 would be enought to power 4x 3012lf t30's? I've calculated and it's supposed to give approx 49 rmsvolt, will it be enought? How much headroom will i need/want?

I'm asking cuz the 1600 is the only one i can find in europe in a while!

Thank you

I think i have my mind made on the ipr4500

IPR4500 won't be available until probably this fall...if it doesn't get pushed back (again)