Peavey IPR class D amps - Page 11

So, while I definitely dig it, I'm not as much of a home theater geek as most of you; I'm more of a musician/live sound guy.

I stumbled across this forum while researching the new IPR's, and this thread is VERY entertaining and educational!

I currently use a Crown XLS402 to power my floor monitors, and it seems like the IPR1600 is supposed to be just a little better performance wise.

I've been thinking about picking up the IPR to power my floor monitors, and then bridge the Crown to power a couple of subs.

A friend of mine manages a music store that just got in the IPR1600... I think I'm going to see if I can borrow it, or possibly take my Crown in to the store and A/B them.

I mean, if it really does sound better/louder than the XLS402, then the published specs are likely legit, correct?


Steve

SirNickity, Thank you!





Arthur, I'm a bit busy today, so hopefully we won't get into another lengthy back and forth, but ..... sorry dude. Most of your assumptions regarding what you think you see in the design are just wrong. You are trying to demonstrate your engineering ability and in the process trying to prove that something that is, can not be. If you were working for me, I'd be giving you a speech about spending your time figuring out how something can be accomplished (IPR1600) as opposed to various reasons as to why it can not be accomplished. If you truly are an engineer, focus on getting it done and not on why it can't be done. I hear Larry the Cable Guy in the background .........

Dear JD,

I'm busy too today and I will not reply to your message because it has nothing inside except saying I'm wrong. As you don't want to discuss the technical merits of your amp, we will postpone this discussion later when I will have one IPR in hands.

have a good day
--Arthur

When comparing amps- BE SURE to have both amps set so the same input signal produces the same output level.

Then you can turn them up and see which one will "get louder".

If you don't do this-then the amp with the higher sensitivity (or lower input level requirement) will always win.

And the one that is even a little tad bit louder will sound better.

Be sure you are comparing apples to apples.

Steve F, welcome to the forum. Since you are new and neutral, and have access, hopefully you can help resolve some questions. Please connect two ohms worth of speakers to each channel of each amp and give us the results.

Thanks
jd

[quote=Sickneedhelp;18159632]
JD,

I don't know what you would expect from the 9200 in those tests, but what it did under those conditions I consider a very good performance compared to most of the other amps tested. Virtually NONE of the amps met their specs in Mr. Knowles's test in all aspects. The ones that came closest included 2 of the Crest's the 8002, the 9200. I very seriously doubt that anyone would be returning that amp as defective, seeing as it outperformed most of the field and the real world measures are much less strenuous.

How many buyers really bench test their amps? 1 out of 1000? It can't be too many.

WooHoo, front page news hehe

Thanks JD,

My Crown is not rated down to 2 ohms, so I'd feel much more comfortable testing them both with the same 4 ohm load that I normally run.

It's still apples to apples, and then if the IPR fares well, the 2 ohm capability is just a bonus, right?


Steve

Hi Steve

The two ohm spec seems to be the one most questioned, so I was hoping I could get something from someone neutral that indicated it might just work as claimed. If the Crown works at any reasonable level into two, that is a bonus since they make no claims to do so. The burden to perform at two is the IPR's, not the XTi's.

Any follow-up input from your test is appreciated.

jd

We REALLY need to get one of these to Chuck for testing. I'm sure that many are highly interested.

Greetings. Just back from tinkering with the EPQ1000. Whew....had a few moments to browse around and noticed my friend ArthurG with striking similarities to ArthurFelix at ProSound Web.

Everyone here has claimed their identity. As you know, I am President of Behringer.

Sick relinquished so we can judge the merits of his comments. It also opens the door to scrutiny if his amplifiers don't perform exactly as he claims.

There are many here who would enjoy your affiliation so we can do the same. Many theories and numbers have been put forth without being able to verify against products in the real world. I challenge you to put the, as we in Germany love to say, the "sauer" with the "kraut".

Besides, I am a little short-handed for the "program". We'll be in touch.

Hello Mr. Behringer,

Is there any chance of a software upgrade for some of your components, ala DEQ/DCX that would extend filter ranges down to 10-15 Hz.?
It sure would help the community out here and probably make your products one of the best solutions for EQ duty, more so than it is already.

I thought there already was, via a 'hack' from another forum. Of course, you need to be in invitee to get that information.

This has the pungent stench of a farce fed alias.

Almost undoubtedly!

But it is fun to humor him.

REALLY!??!

I would be very interested in that information if it does indeed exist.
Any idea what forum?

One chance to prove your merit.



Why did you re-badge the EP2500 as the EP4000?

Even the Behringer name is stolen, a morphing of two items below.






+

you are hilarious thy.

however, uli is something of a business genius. headquartered in monaco to boot. lol...he is the one laughing. cute ursidae and hominids not withstanding.

Naked Redhead = BareGinger

Thy, you never cease to humor me with what you come up with, and so quickly too.

+1 That would be great


Mike care to expand on this info... possibly make a new thread about this....

+ 1, I would like to know about the DCX hack also..

Cheers...

I'm an independent developer of audio switching power electronics from Europe. I have been developing technology similar to the one used in Peavey IPR amplifiers and I have got similar or better results in terms of efficiency and size/weight/cost reduction.

So I would like to back the claims made about these amplifiers for all the skeptical people.

One of my current developments (for an U.S. company which does not sell directly to end customers) is a single channel plate amplifier capable of 2800W into 4 ohm (all day long with breaker bypassed) and 5000W into 2 ohm for 1 second with 1/3 duty cycle (internally limited through simple analog computer to avoid tripping breakers).

These power levels come from a module that is more or less the size of the PCB in the IPR1600 (but taller) and that does not even require a fan on the heatsink. In fact, it can play +/-100V full-range music into 4 ohm speaker without any heatsink (which is only required for subwoofer and/or 2 ohm duties, or sinewave testing).

Efficiency from mains input to speaker output is around 95%. Efficiency is the key to make such small and low cost amplifiers. Power is intended to be delivered to the load, not to be dissipated in the amplifier. Clever use of latest generation MOSFET make this possible, rendering all the class AB stuff even more outdated than it is now. Like the IPR developer, I can't give more details, as the risk of being copied is high.

The debate about the 400W power consumption figure is funny because an appliance may draw 4KW bursts and still 400W average without tripping a 400W breaker.

The amplifier mentioned above can draw over 40A rms from mains for 1 second, yet the limiter makes it very hard to trip a 20A breaker. A more powerful 230V version that can also run on 240V two-phase and 208V three-phase power is also on development, while the 120V version can be considered finished.

In my opinion, what makes some people angry about these new designs (including most class-AB-only amplifier designers) is that they are seen as black magic, something that they can't understand. Amplifier technology standards are quickly changing and they are angry because they can't keep themselves up to date... (So either learn or choose another job )

Wait until the marketing department starts work on your project and creates literature

Evapowah, welcome to AVS and thanks for your contribution. If you can disclose which amps these are that would be great. Of course, if it is yet to be released then totally understand

and so ?

Welcome to AVS evapowah. Obviously you've been a "reader" for a while before you decided to become a contributing member.

Interesting you mention the IPR amplifier and it's design and function claims. We currently have a member who is employed by Peavey and has just agreed to supply an IPR 1600 to this forum for testing.

Stand by for more details as other members schedule and plan a way to make the tests and report the results on this forum.

The other relevant thread entry follows:

"Unread Today, 09:23 AM #1606 | Link
Sickneedhelp
Member

Join Date: Feb 2010
Location: Meridian, MS
Posts: 59

Quote:
Originally Posted by LINEARX View Post
........... You've convinced me that your new 7lb baby is for real, you just gotta do an "in situ" performance by which we can all see for ourselves that the IPR 1600 is the real deal and it's advertised specs are real world . . . . so to speak.
Okay ........ hopefully by now everyone has read Eva's commentary at http://www.avsforum.com/avs-vb/showt...150665&page=11

Reading her input on another forum, she definitely knows her stuff. That should make some on here feel a bit better about the wild claims some of us are making in regards to the technology.

Marketing says they will provide an IPR1600 for the Chuck test. As I noted previously, I have concerns about Chuck being able to measure class D accurately. However, it's unreasonable to expect someone who measures amps as a favor to forum members to spring for the $$ to buy input filters, mondo variacs, mondo AC mains wires and a day of residential electrician's time. The folks on here will have to accept that Chuck's results, best case, will be approximate due to no fault on anyone's side.

I don't know if Marketing will choose to ship one directly or to have the regional rep drop one off at Chuck's doorstep.

Tag, you're it
jdb "

Possibly you'll have additional information to add about your similar project without releasing or compromising intellectual property. We would welcome that.
Maybe you, "evapowah" and "Sickneedhelp" could benefit each other and us members as well, by having a sort of "public" dialogue right here on the AVS forum in regards to the latest in amplification and DSP. Or maybe we could make a separate thread where both of you become our Class D gurus and do question and answer. There are lots of possibilities to bring enlightenment to the electronically challenged and/or interested.

[quote=ArthurG;18291825]and so ?

That was borderline rude. Nevermind. It was just rude. We here at Behringer frown on that sort of behavior.

Arthur, from what I've seen of Eva in other forums, she has her facts together AND makes it a point to help others. Contrast this to your self promotion that you make at the expense of others in here and in other forums . Eva was straight with us about her role. You've yet to admit that you work for a Chinese amplifier company and take interest in a slant.

Hopefully MBenz will include himself. Judging from his posts, he probably knows as much as the rest of us put together, except for of course my buddy Arthur. Those of us commercially involved have to be very careful with participation. Hope everyone understands.