Peavey IPR 1600 DSP

[Rickisan]

Is it only me but seeing a 1/4 cable pulled tight wanting to make like the tacoma bridge is amazing.

What does this mean? I don't understand... : )

[sine143]

it means his 2 vplates are held together with a 1/4 steel cable that has been tightened with a turnbuckle. yet even as tight as they go, they created sine waves regardless.

[Rickisan]

Oh! Ok... cool! Thanks!

[fyah2k5]

This sounds great. My question is, how well do these amps work if the supply voltage drops below 110v/220v?

[ncgrove]

This sounds great. My question is, how well do these amps work if the supply voltage drops below 110v/220v?

If the mains voltage is constantly sagging, I'd be worried about all of my electronic gear.

[fyah2k5]

Reason for my concern is that I plan on running 4 T39s, preferably LAB12 loaded, and i was told my boat anchor QSC RMX2450 might have a little difficulty giving these subs all they require. Plus, I'd love to get rid of the heavy weight champ and go for a feather weight that can get the job done.

But on the note of supply voltage, I've seen sound systems play in venues that i frequent and see voltage on the power conditioners dip to 100volts, even to 97volts when the bass hits. I wont be drawing so much current, but i just wanna make sure i'm gonna get the best output with the supply voltage i got.

[Michael Murphy]

fire2005, fyah2k5, According to most everyone the QSC 2450 is the go to amp for lab loaded T39's, at 650w @ 4ohms it will run a quad, 50.99v to each cab, parallel wired up,2 cabs per channel.

I was looking into the specs again on the IPR and a point I did note is that all figures recorded were done with 120v, and is the required input voltage for the amp. Just read another post in amps on a berry and some K amp, the poster was very detailed in his test procedures and im wondering if I have it in me to do the same with the IPR to get a better handle on its limitations especially interms of low voltage. I tested my power and during my volt test I was giving the amp 117v.

One other point to mention is that yes the voltage would have dropped on a bass kick when using a 4 x 4 stack of double 18" EAW's, with the efficiency of BFM cabs you can equal the SPL with a fraction of the power, thus leading to the less likely hood of low voltage during a bass kick or bass line.

Ive only just got the IPR, but I would not have bought it and had it shipped 1/4 way round the world if I did not think it was up to the task.

fyahbndem

[fyah2k5]

Ok. I've always loved that QSC amp, except its weight, never failed me yet. Although, one night it did shutdown for a bit, got to hot I guess.

When I get to the point where I'll be using Otops or DRs, I'd like to get one of these IPRs. Its lighter than the other QSC lightweights and looks a little easier on the pocket too. The IPR1600 would coast along nicely with 2 or even 4 OTops or DR200s right?

[Michael Murphy]

Well my plan is to run 2 OT12's on 1 ch and the T39's on the other, when Im done with the other 2 t39's the IPR will power them, 2 per ch. Ill have some data soon as regards to the voltage the OTs will use in comparison to the T39's to match the SPL output. Got my SA 3055 so testing will resume soon. IIRC the voltage the OT's use to match the T39's is allot less, hence the purchase, if push comes to shove the IPR will run the soon too be 4 OT's which it will do with out breaking a sweat. Im hopeful/confident it will still have enough power to run 4 T39's though. Soon we shall see.

[kkip]

The IPR-1600 is a great amp and a perfect match for a pair of T39s. I have an IPR and have been driving a pair of 3012LF loaded T39s. That being said, it may be a bit light for driving a pair on each channel. The issue is that the IPR's maximum voltage (and wattage as a result) drops as the load increases. Below is a scope capture of the IPR driving a 4 ohm load at clipping (DDT on). Notice that the RMS voltage is only 45 volts not the full 50 volts. Still perfectly usable, but a bit short of the maximum.

Note the scope shot is from the Abletronics lab tests of the IRP-1600: http://www.abeltronics.co.uk/amptesting ... _IPR-1600#

[Ryan A]

Here's a video of an IPR 1600 dsp going to town on a pair of (4 ohm) T39's (one per channel). Figured I'd post it here because its relevant to the subject/debate. If the distortion bothers you I apologize.

http://www.youtube.com/watch?v=0zXgMukMacM

The ipr3000 would be better suited for a quad stack of subs, but the 1600 is no slouch and is great for a pair. If you're running a 10 ohm cab per channel though the (1600) might seem a bit under-powered. 4 ohms is a better load for this amp.

[fyah2k5]

OK cool. That begs the question, the DR200 and OT12 are 8 ohm right? I dont have my plans for those yet, so i dont know and the posts I've read thus far haven't expressed this. As well as, what are their voltage limits?

[Grant Bunter]

OK cool. That begs the question, the DR200 and OT12 are 8 ohm right? I dont have my plans for those yet, so i dont know and the posts I've read thus far haven't expressed this. As well as, what are their voltage limits?

Voltage limits for tops will depend on what driver you put into them (much the same as subs).
Lower to higher voltage when going from budget to premium drivers.
This isn't exactly an answer, but you get the idea...