Ipr2 5000/7500?

John Chiara

John Chiara

Senior
Jan 11, 2011
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Troy, NY
I see the 5000 is now out. I am looking to replace aging Carver PM 2.0's. I need to be able to power 4 4 ohm 2x18" subs in small- medium club setups. The 5000 is perfect power. Anyone used a 7500 for subs and have opinions? Any idea when the DSP versions are due?
 
Re: Ipr2 5000/7500?

Opinions, don't need to hear one, more bull poop sales specs


Rated Watts 2ch x 2 ohms 3230 watts 20ms repetitive burst / 2530 watts 1% THD both channels driven @ 1kHz.
Rated Watts 2ch x 4 ohms 1985 watts 20ms repetitive burst / 1700 watts 1% THD / 1470 watts 0.15% THD, both channels driven @ 1kHz.
Rated Watts 2ch x 8 ohms 1175 watts 20ms repetitive burst / 1025 watts 1% THD / 880 watts 0.15% THD, both channels driven @ 1kHz.
Minimum Load Impedance 2 ohms
Maximum RMS Voltage Swing 105 volts
Frequency Response 20Hz - 22kHz; +/- 0.5dB at 1 watt.
20Hz - 20kHz 2ch x 2 ohms <0.5% @ 2250 watts 20Hz to 4kHz, decreasing to 1640 watts @ 20kHz, both channels driven.
20Hz - 20kHz 2ch x 4 ohms <0.15% @ 1400 watts 20Hz to 10kHz, decreasing to 1350 watts @ 20kHz, both channels driven.
20Hz - 20kHz 2ch x 8 ohms <0.15% @ 860 watts 20Hz to 4kHz, increasing to 1000 watts @ 20kHz, both channels driven.
Input CMRR
 
Re: Ipr2 5000/7500?

Alan Sledzieski said:
Opinions, don't need to hear one, more bull poop sales specs


Rated Watts 2ch x 2 ohms 3230 watts 20ms repetitive burst / 2530 watts 1% THD both channels driven @ 1kHz.
Rated Watts 2ch x 4 ohms 1985 watts 20ms repetitive burst / 1700 watts 1% THD / 1470 watts 0.15% THD, both channels driven @ 1kHz.
Rated Watts 2ch x 8 ohms 1175 watts 20ms repetitive burst / 1025 watts 1% THD / 880 watts 0.15% THD, both channels driven @ 1kHz.
Minimum Load Impedance 2 ohms
Maximum RMS Voltage Swing 105 volts
Frequency Response 20Hz - 22kHz; +/- 0.5dB at 1 watt.
20Hz - 20kHz 2ch x 2 ohms <0.5% @ 2250 watts 20Hz to 4kHz, decreasing to 1640 watts @ 20kHz, both channels driven.
20Hz - 20kHz 2ch x 4 ohms <0.15% @ 1400 watts 20Hz to 10kHz, decreasing to 1350 watts @ 20kHz, both channels driven.
20Hz - 20kHz 2ch x 8 ohms <0.15% @ 860 watts 20Hz to 4kHz, increasing to 1000 watts @ 20kHz, both channels driven.
Input CMRR
Click to expand...

No personal experience, no references to independent tests, just saying that the specs are a bunch of lies? How is this helpful?
 
Re: Ipr2 5000/7500?

Chris Van Duker said:
No personal experience, no references to independent tests, just saying that the specs are a bunch of lies? How is this helpful?
Click to expand...

I was just looking at the 20 ms burst test and how the amps fall on their face at 1khz, can only imagine what happens at 60 hz. So I didn't say the specs are lies, just enough to know I wouldn't buy one. Along with it being a low cost d switching amp,, just a lot of bad taste in my mouth. I never heard a good class d amp yet in that price range. I would say this amp is in line with the Inukes.

As far as independent tests, I have a very good friend local that repairs these new crest and peavy amps. He will not publish what they do,
 
Re: Ipr2 5000/7500?

Alan Sledzieski said:
I was just looking at the 20 ms burst test and how the amps fall on their face at 1khz, can only imagine what happens at 60 hz. So I didn't say the specs are lies, just enough to know I wouldn't buy one. Along with it being a low cost d switching amp,, just a lot of bad taste in my mouth. I never heard a good class d amp yet in that price range. I would say this amp is in line with the Inukes.

As far as independent tests, I have a very good friend local that repairs these new crest and peavy amps. He will not publish what they do,
Click to expand...

I'm still wondering why RMS or average power actually matters for peak output? By definition in music, peak cannot equal average, and peak is significantly greater than average. So why not rate the amp with a useful peak rating? I'm pretty satisfied with a 20ms burst spec, as it correlates well with the two things that are always on top of my mixes: kick drum and snare drum.
 
Alan Sledzieski said:
As far as independent tests, I have a very good friend local that repairs these new crest and peavy amps. He will not publish what they do,
Click to expand...

Why not? So he can make vague and mysterious statements, or empower you to? Does it give him a hardon to be a superior smartass? It's not goddamn rocket science, plenty of people have done proper output power tests on a wide variety of amplifiers and made the results freely available. Of course, those people were interested in technical discourse, and providing resources for the community to draw upon and learn from.

Things I've learned from this thread:
1) John Chiara is looking for some new amps and is wondering if anyone has experience with the IPR2 series.
2) Alan Sledzieski has none, but would never buy these amps because they're crap and full of lies foisted upon us in secret by the technocrats who rule the upper kingdom.
3) Then Silas might have said something interesting but I missed it because I was all pissed off.

Anyone else learn anything? Even better: Anyone heard an IPR series amp and had a thought regarding it - at the same time?
 
Re: Ipr2 5000/7500?

A couple of thoughts on amps in general.

It was said decades ago "What we really need is an amp that will produce 100 watts continuous and pass 20dB peaks". That would be 10,000 watts.

I totally agree with that statement-and that seems to be more the norm in todays amplifiers-large amounts of voltage swing for short periods of time.

HOWEVER_NOT all music is the same. With "normal" music the above would apply. BUT WITH modern dance/EDM/Rap etc, the low freq duration is CONSIDERABLY longer than the 20 or 40 or 80ms that have become "standard". WIth the sustained tones and very low crest factor-you need an amp that can produce power for a longer period of time.

You also need to look what happens when the amps "settle down" to a lower power and how much power they produce long term-say 3 or 4 seconds.

Now how important this is-REALLY DOES depend on the style of music and what you are doing with it.

Some of the "monster-well respected amps" just don't do as well as others when it comes to these types of signals.

Just something to look at.

It is kinda like speakers-one of the things that manufacturers don't like to talk about (what does it actually sound like at those levels-at what freq is the coverage pattern etc), and they like to focus on the short term power output.

As usual-you have to dig a bit deeper to get the real useful answer-at least as it pertains to you and your usage.

It is also quite interesting to me the number of people I have meet who have already made up their mind about something-yet have never heard it and when faced with the truth-simply refuse to acknowledge it or come up with excuses to try to defend their position-however wrong it may be.

Listen to things with an open mind and THEN make a decision. But there is so much "brain washing" and "wanting to hang with the crowd", that many people put their blinders up real quick.
 
Re: Ipr2 5000/7500?

I've used my IPR3000 on my 4 ohm FH 1x18" subs (840w/ch) and been quite pleased with how they "kick" - very "solid" sounding. I've also been using a pair of IPR1600's for monitors, they've been plenty loud even with an ampless rock band that had acoustic drums. No problems with any of the amps - and my 6U Gator GR-6S amp rack weighs ~40 lbs loaded 8)~8-)~:cool: .
 
Another company we do some work with has 4 of the 7500 on sub duty. Was kinda underwhelmed. They in no way competitive in terms of output with our Itechs. For a single kick hit there isn't a difference, but for edm even the Yamaha t5n amps have better long term output. They also went into protect once during an edm show we combined gear on.

Sent from my Galaxy Nexus 4
 
Re: Ipr2 5000/7500?

Charles Harrigan said:
Another company we do some work with has 4 of the 7500 on sub duty. Was kinda underwhelmed. They in no way competitive in terms of output with our Itechs. For a single kick hit there isn't a difference, but for edm even the Yamaha t5n amps have better long term output. They also went into protect once during an edm show we combined gear on.

Sent from my Galaxy Nexus 4
Click to expand...

This makes sense. I am doing modern country and jam band acts mostly...or pop rock. No droning synth bass or other extended low frequency content.
 
Re: Ipr2 5000/7500?

Charles Harrigan said:
Another company we do some work with has 4 of the 7500 on sub duty. Was kinda underwhelmed. They in no way competitive in terms of output with our Itechs. For a single kick hit there isn't a difference, but for edm even the Yamaha t5n amps have better long term output. They also went into protect once during an edm show we combined gear on.

Sent from my Galaxy Nexus 4
Click to expand...

Lol,, Read post #2... : ) and post 4
 
Re: Ipr2 5000/7500?

Charles Harrigan said:
Another company we do some work with has 4 of the 7500 on sub duty. Was kinda underwhelmed. They in no way competitive in terms of output with our Itechs. For a single kick hit there isn't a difference, but for edm even the Yamaha t5n amps have better long term output. They also went into protect once during an edm show we combined gear on.

Sent from my Galaxy Nexus 4
Click to expand...
Are they driving the same subs-in the same configuration-with the same tops and same alignment-doing the same shows in the same venues with the same operator?

If not yes to all of the above-it is REAL hard to do any comparisons-because there are so many other variables.

Audio is REAL confusing in that regard. Yes you can do some "listening" but if YOU are not in control and nothing else changes-you are not really sure what was causing the difference.

If you "think" the amps are the thing that makes all the difference-then that is what you will believe. But if you "think" the subs make all the difference-then THAT is what will make the difference.

But if you "think" the kick mic is the thing that makes the difference-then THAT is obviously the thing that is needed to get the same sound.
 
Re: Ipr2 5000/7500?

Charles Harrigan said:
Another company we do some work with has 4 of the 7500 on sub duty. Was kinda underwhelmed. They in no way competitive in terms of output with our Itechs. For a single kick hit there isn't a difference, but for edm even the Yamaha t5n amps have better long term output. They also went into protect once during an edm show we combined gear on.
Click to expand...

The IPR2 7500 appears to sell for just under $800 from various retailers. The iTech 5000 HD (equivalent 8 ohm power on the spec sheet) sells for $2,500. You're comparing a Lexus ISF to a Ferrari 458 Italia.
 
Re: Ipr2 5000/7500?

Bennett Prescott said:
The IPR2 7500 appears to sell for just under $800 from various retailers. The iTech 5000 HD (equivalent 8 ohm power on the spec sheet) sells for $2,500. You're comparing a Lexus ISF to a Ferrari 458 Italia.
Click to expand...
More like comparing a Lexus ISF to a Dodge Ram with a 6.7L Cummins Diesel, for subs we want low end torque more than style and handling ;^).

Ivan is right about low freq duration, 20ms is 3000 cycles at 1000 Hz (enough for any transient), but only 150 cycles at 50 Hz and 75 cycles at 25 Hz.
You need an amp that can deliver full tilt boogie for more than .02 second to maintain "punch" and impact down low.

SpeakerPower makes amps with power supplies optimized for delivering LF power at good value.

Their sub amps can deliver rated power for 3 to 6 seconds at 40 Hz, compared to .02 seconds @1K for the IPR 7500, or 2 seconds for the iT12000 HD.
That difference is not trivial, and in the real world may make a measurable 6 dB difference in actual sub SPL.
 

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Re: Ipr2 5000/7500?

Bennett Prescott said:
The IPR2 7500 appears to sell for just under $800 from various retailers. The iTech 5000 HD (equivalent 8 ohm power on the spec sheet) sells for $2,500. You're comparing a Lexus ISF to a Ferrari 458 Italia.
Click to expand...


So read post 2 and 4 again. Now your post 7 makes no sence after stating what you just did. Like I said its a cheap class d amp, and will also not do what lets say a real amp will do. Yet they post these numbers of high wattage, yet they fall on theit face when pushed.
 
Re: Ipr2 5000/7500?

This is a test on a ipr 1600. Sounds like the 7500 suffers the same way?

Peavey IPR-1600 Amplifier Test Results :: ABELtronics

Pay special attention to this part.


*2R ratings: The upper figures in the 2R column of the table represent 'continuous' sine ratings into 2R at respective frequencies. The mechanical circuit breaker on the rear of the unit tripped repeatedly when subjected to 2R loading, both channels driven, and as such this figure should be considered a 1 second rating. The lower figure in the table, with *, is a ONE-CHANNEL-DRIVEN 2R 100ms burst rating. It is the most amount of power we could obtain from the amp at the threshold of clipping, before power supply limiting and tripping of the circuit breaker. 4R continuous sine also tripped the rear breaker, but only after several tens of seconds. In a music scenario, average current will be lower.

[TABLE="class: ampresultstable1"]
[TR]
[TH]Freq[/TH]
[TH="colspan: 2"]8R Performance[/TH]
[TH="colspan: 2"]4R Performance[/TH]
[TH="colspan: 2"]2R Performance[/TH]
WattsTHD%WattsTHD%WattsTHD%
40Hz2821.125091.13548
925*		0.80
-
1kHz2841.695411.86506
950*		0.15
-
10kHz2801.015501.71531
933*		0.90
-
[TD]
[/TD]
[TD="class: ampres_companion"]All results taken with sine wave input into a resistive dummy load of 8, 4 and 2 ohms (where applicable), two channels simultaneously driven (unless otherwise stated), at the threshold of clipping. These results should be considered maximum 'continuous RMS' power ratings (>5 seconds). Distortion measurements, labelled THD%, are taken with an HP8903A audio analyser (80kHz Bandwidth).[/TD]
[/TR]
[/TABLE]
 
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