Lab Gruppen IPD Specs

R

Richard Carter

Freshman
Nov 30, 2012
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I am looking at these from a cost, rack space perspective and for the DSP capability. The specs on the website are confusing though. They state peak voltage at 70 Volts rms and peak current at 20 Amps rms. Simple OHM's Law give you 1400 watts from that. So how can you list peak and rms as the same rating if rms is .707 of peak? Also are these numbers rated at the usual 1K or is this 20-20K?

I want to use them on low mid, mid and high duty on a 3 way top box, no sub duty. I would like to get away from my XTA DP’s and go to an amp with DSP in it. I am trying to get somewhere between 1200-1500 watts into 4 Ohm stereo. Has anyone used these yet in a similar fashion as I would like to get some feedback on these as far as power and sound quality. I have searched but I can’t find very much information on these.

Other options that i am looking into are the QSC PLD 4.5's or some used itech 4000's.
 
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Re: Lab Gruppen IPD Specs

Richard Carter said:
I am looking at these from a cost, rack space perspective and for the DSP capability. The specs on the website are confusing though. They state peak voltage at 70 Volts rms and peak current at 20 Amps rms. Simple OHM's Law give you 1400 watts from that. So how can you list peak and rms as the same rating if rms is .707 of peak? Also are these numbers rated at the usual 1K or is this 20-20K?

I want to use them on low mid, mid and high duty on a 3 way top box, no sub duty. I would like to get away from my XTA DP’s and go to an amp with DSP in it. I am trying to get somewhere between 1200-1500 watts into 4 Ohm stereo. Has anyone used these yet in a similar fashion as I would like to get some feedback on these as far as power and sound quality. I have searched but I can’t find very much information on these.

Other options that i am looking into are the QSC PLD 4.5's or some used itech 4000's.
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It depends on what you call "peak".

Some people consider "peak" to be the maximum output.

You are correct that peak is 1.414 x RMS.

It can get confusing. So you really need to be sure what the manufacturer is talking about.

I can't help you with this amp. Are you sure the peak current is available at the same time as the peak voltage? Into what impedance?

For example an amps maximum voltage is into a higher impedance, but the maximum current is often into a lower impedance-but not into the same impedance-usually.
 
Re: Lab Gruppen IPD Specs

Ivan Beaver said:
It depends on what you call "peak".

Some people consider "peak" to be the maximum output.

You are correct that peak is 1.414 x RMS.

It can get confusing. So you really need to be sure what the manufacturer is talking about.

I can't help you with this amp. Are you sure the peak current is available at the same time as the peak voltage? Into what impedance?

For example an amps maximum voltage is into a higher impedance, but the maximum current is often into a lower impedance-but not into the same impedance-usually.
Click to expand...


I get that Ivan. But it just makes their specs even more confusing now. This is puzzling as I have a few of the FP14K's and their specs do not read like that. Hell even on the old FP3400's I have they even give the power rating on the case and state that it is power at 1K which in just my opinion I hate as I want to see a 20-20K rating.
 
Re: Lab Gruppen IPD Specs

Richard, I first bought 6 ipd 2400s. I used 4 for a biamp monitor kit in an A level bar band club, powering Martin le400 (Jbl 1", Jbl 15"). The other two I used on my b kit... 4, Kf650e tops. They sit over 4, tx9s powered with pl380s. The ipds have "kept up" in all instances. I recently purchased some passive Danley tops (which will be pl380 powered), so I bought two more, ipds and plan to use all 4 for a biamp monitor kit for out. Now having said that, I've been using the ipds to test the danleys, vs 650's ( using the internal processing) and I have no complaints. They seem to have enough umph ( on tops) to keep up with 4 subs on a pl380. Let me know if you need more detail. Pm or email
 
Re: Lab Gruppen IPD Specs

Richard Carter said:
I get that Ivan. But it just makes their specs even more confusing now. This is puzzling as I have a few of the FP14K's and their specs do not read like that. Hell even on the old FP3400's I have they even give the power rating on the case and state that it is power at 1K which in just my opinion I hate as I want to see a 20-20K rating.
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Have you tried actually calling Lab Gruppen and ask to speak to somebody?

I find that is a good way to get information you need.
 
Re: Lab Gruppen IPD Specs

Richard Carter said:
I shot them an email, waiting on reply.
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This is not intended to sound mean or harsh-but I hear "I sent them an email" all the time.

Many people use it as an excuse.

Maybe I am old fashioned, but I like A REAL PHONE CALL much better. You often get more information and you have a POSITIVE that you actually talked to somebody.

With email you never know if it going to the caught up in spam-lost in "internet land" or just ignored. Yes it happens.
 
Re: Lab Gruppen IPD Specs

If you are in the states you most likely end up getting in contact with Josh Evans. If you cant get in touch with him, let me know and I will share his E-mail with you. Josh is really top notch and wont let you down.
 
Re: Lab Gruppen IPD Specs

Ivan Beaver said:
This is not intended to sound mean or harsh-but I hear "I sent them an email" all the time.

Many people use it as an excuse.

Maybe I am old fashioned, but I like A REAL PHONE CALL much better. You often get more information and you have a POSITIVE that you actually talked to somebody.

With email you never know if it going to the caught up in spam-lost in "internet land" or just ignored. Yes it happens.
Click to expand...

I have a support ticket number so I am sure that it did not get lost or go to spam. This is the way I like to communicate, my personal preference. I shot a request to QSC a couple of weeks ago on the IPD 4.5 to confirm some things and their reply was prompt and concise as I am sure L.G.'s will be.
 
Re: Lab Gruppen IPD Specs

Richard Carter said:
I have a support ticket number so I am sure that it did not get lost or go to spam. This is the way I like to communicate, my personal preference. I shot a request to QSC a couple of weeks ago on the IPD 4.5 to confirm some things and their reply was prompt and concise as I am sure L.G.'s will be.
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I got a very swift response from L.G. and it pretty much took care of my concerns for any one interested here is their response as this may help someone else make a decision by using the search function.

Sorry if the specs are confusing! will take a look at this.
Fact is:
70VRMS (100V peak)
20ARMS
The product is measured 20-20KHz with a burst signal that replicates the behaviour of very heavy music material, which in short consists of a couple of ms peak power followed by a couple of ms RMS power, repeatedly.
Looking at the specs for the W8LC i can see that the power needed in the LF (1600W@8 ohm) makes IPD a bit weak. 800W@8 ohm. Meaning you will lose 3dB of output on the LF.
If your applications is not heavy Metal it will probably work fine, but be aware that you will probably be using the amp close to its maximum in many cases. I suggest implementing our hidden RMS limiters in your presets if you proceed.
IPD seems to be a very good match on MF and HF.
Dont know if this info answers your questions. If not, feel free to get back to us.
Best Regards
 
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