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New amp choice for sub duty - CV5000 or Peavey IPR7500? - Page 5

post #121 of 211
^^^ Thanks, I may be rethinking my loyalty to QSC! I keep modeling drivers - I'm still in Cambodia and all iI can do is model sub builds while listening to my iPod wife and kid have already moved back to the US and I am outta here in less than three weeks smile.gifsmile.gifsmile.gifsmile.gif. Now I am leaning towards an UXL-18 based sub system (4 cu ft with LT to boost the low end), the Peavey can power 4 units (2 per channel) past Xmax. Due to the cost of the UXL's would have to go with a staged approach. Would start with one to mate with my existing Mal-X. Then would sell the Mal-X for a second UXL. Once the wife is distracted then buy the third and fourth. Was going to go the Dayton route, but don't think I can get away with 8 subs. frown.gif
post #122 of 211
Quote:
Originally Posted by NWCgrad View Post

^^^ Thanks, I may be rethinking my loyalty to QSC! I keep modeling drivers - I'm still in Cambodia and all iI can do is model sub builds while listening to my iPod wife and kid have already moved back to the US and I am outta here in less than three weeks smile.gifsmile.gifsmile.gifsmile.gif. Now I am leaning towards an UXL-18 based sub system (4 cu ft with LT to boost the low end), the Peavey can power 4 units (2 per channel) past Xmax. Due to the cost of the UXL's would have to go with a staged approach. Would start with one to mate with my existing Mal-X. Then would sell the Mal-X for a second UXL. Once the wife is distracted then buy the third and fourth. Was going to go the Dayton route, but don't think I can get away with 8 subs. frown.gif



Good plan, if you can "only" biggrin.gif get away with 4 subs and don't want to spend over 900 per driver the UXL is the way to go. Of course there is the FTW 21 but that would have a lesser WAF than the UXL.

However, could you do 4 subs all dual opposed enclosures? How about 4 dual opposed UXL's?!?! eek.gifbiggrin.gif
post #123 of 211
^^^4 dual opposed UXL's would be awesome. Based on winISD it takes 6 Daytons to equal 4 UXLs, 4 cu ft w/ LT set for 20 Hz. 8 UXL's would be awesome! Perhaps once I retire and settle down somewhere in Kansas, Oklahoma, or Texas. After 20 years in navy I don't even want to see water (although I am not a line officer so sea duty was not an issue, no need for microbiologists on navy warships). I want land and a good mancave to build my ultimate theater (who am I kidding, I am far more into the sound than the video which is why I listen to music about 80% of the time). But, I find good subs are essential for setting the foundation for pretty much all the music I listen to, although hearing the subways on some older recordings sometimes startles the crap out of me).

A couple of these big Peavey's could drive em pretty hard. I wish the Crest Audio versons would ever come out, all I can find is the little PROlite 2.0.
post #124 of 211
Hey Andrew - Finally got my subs hooked up last night ... I have an issue and only 3 subs are playing (probably a speakon terminal issue) but WOW!! I'm still at -10db on the Peavy and Audyssey still wants to turn the subs down -10.5db.... I'm not a huge basshead so I probably won't have an issue with the Peavy trying to weld the voice coil to the pole piece tongue.gif:p:p

I haven't got my mic out yet, but I'm guessing I have a huge hump below 30hz (similar to my ULS b/c of room gain). It sounds heavy on the ULF. Looking at miniDSPs now ...

btw - I have no issues with gains using the 4311 to the Peavy, so I don't necessarily need XLR outs. Might go with the 10x10 b/c its rack mountable and gives me more in/outs than I will ever need.
post #125 of 211
Thread Starter 
Glad you are enjoying so far! Just wait until you really get to crank it up. smile.gif

I recently sold my mini 2x4 which I was using for sub duty. I locally (luckily) stumbled upon a 10x10 mini which I'm using now to control everything. It's a lot easier to hookup and control if you're willing to shell out the extra $$$. Functionality is basically the same though, just a bit more channel availability.
post #126 of 211
Hey Gorilla, couple questions about the peavey's. How loud are the fans? Would the amp be ok plugged into this http://www.amazon.com/Conntek-1F515520-1-Foot-15-Amp-Adapter/dp/B00439KIF6/ref=sr_1_1?ie=UTF8&qid=1377116391&sr=8-1&keywords=nema+5-15+to+nema+5-20 ? obviously not ideal to use it on a 15A circuit... but would only be temporary for a year or two. Or I could just put this where a 15A socket is. a lot cheaper.. http://www.homedepot.ca/product/duplex-receptacle-15a-20a-white/903932 , would probably violate code though :S

How does the power output compare to a fp14000 clone?
Edited by JWagstaff - 8/21/13 at 1:43pm
post #127 of 211
it outputs much more power then a clone could ever on a 120/15a
post #128 of 211
Did you test the peavey the same way and was your clone a good one since they are so unreliable?
post #129 of 211
BTW, you are the first to say these amps have more power, Notnyt and Bosso and put a few threw their paces and they were more powerful than their Marathon amps(just like these amps) and others.
post #130 of 211
Thread Starter 
MK - I have had three clones (2 14ks and a 10q) and prefer the peavey in every way. I dont have the numbers to back it up like cookie, but they seem to be brutally powerful down low. As long as these guys hold up they are a game changer for the price point for sure. The five year warranty helps puts the mind at ease too. More power than I need at the moment with two of the 7500s but plenty in reserve should I move to 24s or more 18s.

Jwag - the fans are loud for sure, especially when you are cranking on them. You could run them on a 15a circuit but if you lean on them they will trip the breaker for sure. biggrin.gif
post #131 of 211
Well that would be great for sure but we need numbers, response graphs, etc. Maybe Bosso can put one through its paces and see how low it goes.
post #132 of 211
I guess no one has done a fan mod yet... have yours ever even gotten warm? I assume the typical fan mod would work, it seems like all these pro amps have 45 dB fans and get replaced with 19 ish dB fans that are about half CFM.
post #133 of 211
Gorilla did you ever run this amp at four ohms with your subs?

Still have not gotten anything yet. Still have some months to go but think this amp is still number one so far.
post #134 of 211
Quote:
Originally Posted by JWagstaff View Post

I guess no one has done a fan mod yet... have yours ever even gotten warm? I assume the typical fan mod would work, it seems like all these pro amps have 45 dB fans and get replaced with 19 ish dB fans that are about half CFM.

yep, I will be looking into this as I would prefer to keep it in the rack. Once I receive it tomorrow, I am going to pop the hood and have a look at what is needed.

Quote:
Originally Posted by chrapladm View Post

Gorilla did you ever run this amp at four ohms with your subs?

Still have not gotten anything yet. Still have some months to go but think this amp is still number one so far.

I will at least initially be running one channel 4 ohm stereo with 4 SI's on it until I get the subs out to rewire. So i should be able to report back on that soon enough.
post #135 of 211
Thanks Beast.
post #136 of 211
Subbed
post #137 of 211
Beast?

Just curious if you had a chance in 4 ohm stereo.
post #138 of 211
Quote:
Originally Posted by JWagstaff View Post

I guess no one has done a fan mod yet... have yours ever even gotten warm? I assume the typical fan mod would work, it seems like all these pro amps have 45 dB fans and get replaced with 19 ish dB fans that are about half CFM.
I am considering a fan mod on a CV5000, which seems to have 100.5CFM rated fans at 45dB each - it's like having a few noisy PCs running... lol

What sort of dB should we be looking at for replacement fans for amps that are in the same room as you are sitting?

Is 30-something dB too loud?


I'm looking at some options on this site: http://www.quietpc.com/120mmfans,
maybe the Scythe GlideStream 120 1600 (90.1CFM, 31.7dB)
or the Reeven ColdWing 120 PWM (82.1CFM, 29.8dB)
or the Nexus 120mm PWM (76CFM, 26.9dB)


I am, however, worried about voiding the warranty and the airflow being too low... but I highly doubt they are going to be running anywhere near maximum on the gain knobs once they're EQ'd in! lol
post #139 of 211
I doubt a 120mm fan would fit, I think they're 80 mm?
post #140 of 211
Quote:
Originally Posted by JWagstaff View Post

I doubt a 120mm fan would fit, I think they're 80 mm?
120mm!

http://www.cerwinvega.com/images/Products/Amps/cv-5000-back-lg.jpg

Jamicon JF1225B2UR-R (two of)


My internet trawling came up with the following specs:

http://www.jentech.cn/index.php?c=msg&id=144&

120mm x 120mm x 25mm
100.5 CFM
Rated Voltage 24V
Operating Voltage 20.4V - 27.6V
0.269 Static Pressure (inchH2O)
3000rpm +/- 10%
Input current 0.28A
Input Power 6.72w
Nominal current 0.28A
Noise (dBA) 45.7
Weight 195g
Construction in plastic UL 94V-0

smile.gif
post #141 of 211
Edit. Just re-read and I see that 2ohm is very stable.
Edited by pdxrealtor - 9/9/13 at 12:03pm
post #142 of 211
Quote:
Originally Posted by pdxrealtor View Post

Subbed

Quote:
Originally Posted by chrapladm View Post

Beast?

Just curious if you had a chance in 4 ohm stereo.

Yep thanks to pdx for reminding me to post my impressions here biggrin.gif So, right now I have 4 SI's on a single channel wired to 4ohm. This amp is a beast. I have listened thus far to music mostly and Oblivion last week and it absolutely cranks some wattage. I saw the DDR lights flicker a couple times during some really testy tracks I was throwing at it, at reference, with the subs somewhere between 15-20dB's hot biggrin.gifbiggrin.gif I would also note that I don't really see the fans as terribly loud. After some extended listening session with demanding dubstep tracks and rap, when the fans cut on to high gear, they were annoying but sitting ~10ft from my equipment rack off to the side of the theater, it doesn't bother me enough to just run out and start pulling fans for mods. It is a good bit quieter than the clone without a mod, but once the fans hit double time, they are about the same.

All in all, I can't wait now to get some wood and start working on the other two boxes to get all 8 back in the setup. I think 4 per side with the SI's is a perfect match for this amp! Going any hotter in the sub region got it all sounding way too overbearing so I think with one amp and that amount of power, I should be in good shape...until more woofers show up smile.gif
post #143 of 211
So you are running less watts than the SI s are capable of?

SI is 600 watts / driver and a 4ohm load into the amp gets you 2022 watts.

Are your 4 drivers not capable of running 2ohm (d2 ?)?

Just curious smile.gif
post #144 of 211
Thread Starter 
Nice, beast! Anyone else up for doing some testing out in 2 ohm mode? I need a pair (or two-four pair) of UXLs or LMS please. biggrin.gif
post #145 of 211
Quote:
Originally Posted by Gorilla83 View Post

Nice, beast! Anyone else up for doing some testing out in 2 ohm mode? I need a pair (or two-four pair) of UXLs or LMS please. biggrin.gif

Huh? I thought you put it through its paces in 2ohm. What did I miss?
post #146 of 211
Thread Starter 
Quote:
Originally Posted by pdxrealtor View Post

Huh? I thought you put it through its paces in 2ohm. What did I miss?

Oh I did, and still do nearly every day. biggrin.gif Would be cool if someone with some serious woofage could test to see what it really will do though. With ~1600-1800 watts per driver on tap it's way more than my Daytons want. tongue.gif
post #147 of 211
Quote:
Originally Posted by MemX View Post

120mm!

http://www.cerwinvega.com/images/Products/Amps/cv-5000-back-lg.jpg

Jamicon JF1225B2UR-R (two of)


My internet trawling came up with the following specs:

http://www.jentech.cn/index.php?c=msg&id=144&

120mm x 120mm x 25mm
100.5 CFM
Rated Voltage 24V
Operating Voltage 20.4V - 27.6V
0.269 Static Pressure (inchH2O)
3000rpm +/- 10%
Input current 0.28A
Input Power 6.72w
Nominal current 0.28A
Noise (dBA) 45.7
Weight 195g
Construction in plastic UL 94V-0

smile.gif

oh that's good, it's way easier to find 120mm fans over 80mm
post #148 of 211
Quote:
Originally Posted by pdxrealtor View Post

So you are running less watts than the SI s are capable of?

SI is 600 watts / driver and a 4ohm load into the amp gets you 2022 watts.

Are your 4 drivers not capable of running 2ohm (d2 ?)?

Just curious smile.gif

Oh they certainly are biggrin.gif and eventually i will double up the amps and wire to 2 ohm stereo instead of 4 ohm and have more power than I would ever need. For the time being the subs were already wired to 4ohm so I just went with that until the new boxes are constructed.
post #149 of 211
Quote:
Originally Posted by Gorilla83 View Post

Oh I did, and still do nearly every day. biggrin.gif Would be cool if someone with some serious woofage could test to see what it really will do though. With ~1600-1800 watts per driver on tap it's way more than my Daytons want. tongue.gif

That.... makes sense. Sounds like it's time for you to upgrade. biggrin.gif
post #150 of 211
Don't tempt him, primates are easily influenced.
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