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Crest CC4000 or CC5500

post #1 of 96
Thread Starter 
The Marathon amp is still delayed

Customer service from the online site is asking if I could pick another amp. The only other choices would be the Crest amps below.

Are those specs legit ???


Crest CC4000
8 Ohm Stereo - 800 W
4 Ohm Stereo - 1350 W
2 Ohm Stereo - 2000 W
4 Ohm Bridged - 4000 W
Toroidal power transformer
Magnetic circuit breaker on/off switch
Cooled by variable speed fan with back-to-front airflow
Mode selector switch for stereo, parallel and bridged-mono operation
Inputs: Balanced female XLR, 1/4" TRS combi jacks
Outputs: Speakon(R) and five-way binding posts
Recessed, stepped attenuators
16-gauge steel chassis, cast aluminum front panel
Five-year warranty

Crest CC5500
8 Ohm Stereo - 1150 W
4 Ohm Stereo - 1800 W
2 Ohm Stereo - 2750 W
4 Ohm Bridged - 5500 W
Toroidal power transformer
Magnetic circuit breaker on/off switch
Cooled by variable speed fan with back-to-front airflow
Mode selector switch for stereo, parallel and bridged-mono operation
Inputs: Balanced female XLR, 1/4" TRS combi jacks
Outputs: Speakon®
and five-way binding posts
Recessed, stepped attenuators
16-gauge steel chassis, cast aluminum front panel
Five-year warranty
post #2 of 96
I would go for the Peavey CS4080 or CS4000 depending what is your goal(8,4 or 2 ohms load) well proven and probably cheaper, since peavey took over Crest couples years ago the CC serie is basically a CS amp with a Crest badge. For the CC5k i haven't seen review from the field yet so i can't tell.
post #3 of 96
Thread Starter 
Thanks, I only have the Crest options as a replacement for the MA-5050 so I just want to know if the CC4000 will be close to the 4000Watt bridged specs.
post #4 of 96
Dam Pen thats A real Bummer, You must be Pi$$ed that Crest have further delayed..
Its looking like the Marathon & the IPR 3000/6000 series amps are A related issue....

Cheers...
post #5 of 96
I'd bet the specs pan out, however it's just based on their track record.

What sucks, because I want a Marathon also, is the omission of the variable sensitivity front end. The line is just so new, there's not a lot out there. Most likely be just fine, typical, Chinese version of a major mfr. products. I'd hope Crest, with their solid rep would over spec and QC this stuff to maintain their cred.

Good luck
post #6 of 96
Thread Starter 
Lets see the CC4000 gets shipped because its ordered now.
post #7 of 96
Is the crest cc 4000 a good amp to use for an infinte baffle setup. Was thinking 4 to 8 18's
post #8 of 96
Thread Starter 
For 4 18", I think one or two EP4000s is enough. 8 18' then sure a bigger amp like the CC4000 (if the specs are accurate) is great.

Start with the EP4000 and move up if more output is needed.
post #9 of 96
Any updates, what do you think of the amp?
post #10 of 96
Thread Starter 
Its well packaged

Its sitting in a box untested
post #11 of 96
I think you will enjoy it. I've used Crest for years and the CP3.0 I have in my listening room *does* deliver spec'd output.

Best,
Mark
post #12 of 96
Are you going to put it under the Xmas tree and wait to open it?
post #13 of 96
It'll probably sit in a box un-opened for years. He's probably got more un-opened, or lightly used, speakers, amps and other goodies sitting around than most of us. It's a disease Penn,..the first step is acknowlegement...and you've done that. The second step is a garage sale..., so let us all know

Actually, I understand. I'm not too much of a diy guy, I've dabbled, however not like Penn,...but I don't think I've never sold a piece of audio or video gear I've owned. I've got it all. I still have my first 8 track/cassette powered deck. The 8 track cartridges and cassettes fit in the same slot.
post #14 of 96
Sorry to revive a dead thread but I saw that the CC5500 amps are available on the bay for a comparable price to the CV5000 amps. I am in need of an amp to power my quad SI 18D2's. Does anyone have any experience with the CC5500 amp?
post #15 of 96
http://maurmun.wordpress.com/2013/01/07/review-of-the-crest-audio-cc4000-amplifier/

I found this review of the cc 4000 by chance. 14 transistors per side , 8 caps at 12000uf, The results looked extremely poor, the tech there was running into buzzing problems and other issues that should not be present in a SO CALLED , WE ARE THE BEST WE ARE CREST, AMP.

The toroid was subjected to metal to metal contact, and this was also causing some issues. I would stick to the Samson and cerwin lines, these amps just don't cut it for the price.
post #16 of 96
Quote:
Originally Posted by tsloms View Post

Sorry to revive a dead thread but I saw that the CC5500 amps are available on the bay for a comparable price to the CV5000 amps. I am in need of an amp to power my quad SI 18D2's. Does anyone have any experience with the CC5500 amp?
I don't think you'd need the extra (rated) power of the crest - a CV5000 to run quad SI18s D2s will be giving each driver 1250wRMS and they're only rated to 600w!

1250w is about the max safe before starting to test its thermal limits, from what I've read, although popalock and carp are running their SIs off a Clone and a CV5000 respectively with no trouble smile.gif (so far.. lol)
post #17 of 96
I sincerely don't know why You are speaking of POOR PERFORMANCE, mainly related to the buzzing generated by the toroidal trasformer, i don't agree with You.
As I wrote in a subsequent note the buzzing is not due to the toroid itself but is a problem of the presence of DC components overimpressed on the mains, and... being the same amount of DC a toroidal transformer generates more buzz as the power loss decrase; that is a unit with less internal resistance will generate more buzz compared to a unit with the same power specs but with a higher regulation, so with a higher power loss. the transformer of the CC4000 seems to have very little power loss...
Moreover the contact of the transformer with the case is not a source of buzz.

HiEnd and Hi Power Home amplifiers normally have a DC filter built inside the case, just to avoid buzzing: check with the Bryston amps and You will find all the high power models having one.

The same CA6 show some buzzing when there is presence of DC.

I had also several days in my house were the CC4000 was deadly silent

This amp is a very good value for money.
As an additional note I'm running it since some months in stereo 4 ohm (at least 1200W / ch) to drive 2 Ciare PW330 mid basses per side, with the led clip suddenly lighting and the amp remains warm

Finally just remember that I was testing this amp at home with a standard 10A plug a not with a specific bench power supply, so this test further confirms the power that this amp could deliver.
post #18 of 96
Quote:
Originally Posted by MemX View Post

I don't think you'd need the extra (rated) power of the crest - a CV5000 to run quad SI18s D2s will be giving each driver 1250wRMS and they're only rated to 600w!

1250w is about the max safe before starting to test its thermal limits, from what I've read, although popalock and carp are running their SIs off a Clone and a CV5000 respectively with no trouble smile.gif (so far.. lol)
At the time with zero feedback about these amps I decided to pass on them. I ended up picking up a demo Peavey IPR2-7500 for 680 off of the bay. It should be arrivin today. I like headroom and the ability to add more drivers onto the amp in the future if I so desire.
post #19 of 96
Quote:
Originally Posted by tsloms View Post

At the time with zero feedback about these amps I decided to pass on them. I ended up picking up a demo Peavey IPR2-7500 for 680 off of the bay. It should be arrivin today. I like headroom and the ability to add more drivers onto the amp in the future if I so desire.
Zero feedback about the Crests?

Or the CV5000?


I think a couple of people have the CV, I know Carp does! smile.gif
post #20 of 96
Quote:
Originally Posted by MemX View Post

Zero feedback about the Crests?

Or the CV5000?


I think a couple of people have the CV, I know Carp does! smile.gif

About the Crests specifically. I know that the CV's are rated very well but the IPR should put out quite a bit more power from a standard outlet than the old school Cerwin. Weighing less than 20lbs is pretty nice as well.
post #21 of 96
I hear you on the weight issue - my CV5000 arrived last week and I struggled to even get it out of the box on my own! lol

I have no idea how I'm going to get it into place behind the TV!!


Will be interesting to see what the IPRs do, I would have considered them myself but they aren't selling in the EU yet frown.gif
post #22 of 96
People need to read the review. Apparently the original power cord on the crest amplifier was starving the unit, as it performed better with a power cord replacement yet. Why would any company with brains put an
inadequate cord on their amplifier.

Basically what i seen here, is a big brag of having one more pair of output transistors per channel, than average for an amplifier like this, and we finally get to find out how many because the reviewer tells us. The pics in the review still do not let us see those as there is a big piece of whatever in the way. The capacitors were 12000 uf and had the same value and number of capacitors as the behringer ep 4000. It also has 4 caps at 12000 uf. Hats off to behringer for this, as it no doubt it a big reason it is one of the most raved pieces of behringer gear for subwoofer duty and only has half the power supposedly of the crest. I have not tried the behringer but I am sure 2 ep 4000 bridged will blow away the crest cc 4000 and maybe the 5500 also.

The CC 5000 I assume has the 8 pairs of transistors per channel that Crest boasts about heavily. The best deal i seen on a crest 5500 was refurbished units sold by Sonicfiber.

As far as the CA series is concerned, hey they got to be good amplifiers. But with four cerwin vega cv 5000 for the price of one Crest Ca 18. Im sure if i bridged them all, I can leave the CA 18 far behind in the dust of my soundwaves.

It was nice to see someone start to take apart and examine one of those crest CC amps. Pics under the hood are hard to come by, they must be using a seal to stop people opening them.
post #23 of 96
jp, have you seen any test of the cv5000 yet? just curious....
post #24 of 96
Quote:
Originally Posted by johnplayerson View Post


I have not tried the behringer but I am sure 2 ep 4000 bridged will blow away the crest cc 4000 and maybe the 5500 also.

Ha, no way man. I had an ep4000 at the same time I had a Peavey CS 4080hz, and driving a 4ohm sub, the Peavey in stereo on just one channel was neck in neck with the ep4000 bridged in 4ohm. The difference wasn't even 1db.
post #25 of 96
he was saying 2 ep4000 bridged = 1 cc4000 in stereo, maybe 5500.
post #26 of 96
Quote:
Originally Posted by LTD02 View Post

he was saying 2 ep4000 bridged = 1 cc4000 in stereo, maybe 5500.

Yep, but I was addressing the "blow away" comment.
post #27 of 96
well, if you carefully read my review I stated, and the schematics confirm this, that the CC2800, CC4000, CC5500 have the same amount of transistor in the output stage (and so their cousins Peavey CS3000, CS4000 and CS4080), and a total of 14, thus 7pair; they differ in DC gain specification (for CC2800 and CC4000) and type, with the CC5500 having the strong MJL21193/21194 driven by the MJL4302/4281 (they are 230W units!!).
Finally the ouput stage is a triple darlington topology (pre-driver, driver, ouput), a configuration wich allow to have less LSN (Large Signal Nonlinearities) and which is able to better driver lower loads.
Very few other brands have a similar amount of output stage transistors like the CCs; probably You will find some china Crest clones with such numbers, but not with te same device qality.

The capacitors are of the same value and number like the EP4000 (just a rebranded EP2500), but are 80V instead of 63V, so the maximum ripple current is already higher; then You should also consider the quality of the capacitors themselves and I can confirm You that those used in the Behrigner are really bad

My experience with the Behringers ended very bad, with a EPX4000 (again a rebranded EPX3000) just thrown away after some months; the amp performed in a decent way on 8Ohm and 4Ohm but was shutting down at around 1300W 4ohm bridged; what do You think of having Your subs become mute in the middle of a party???
Last ... the ICs used in the behringers are really poor (JRC 4580) and beheringers have a really bad "x-over distortion" fugure, like i write in the blog

Giving other numbers, assumung you are driving 2 8ohm subs;

2 x ep4000 (ep2500) 8 ohm bridged = 2 x 1300W (http://www.avsforum.com/t/855865/measuring-amplifiers/60#post_10755565)
1 x CC5000 stereo 8 Ohm = 2 x 1350W
1 x cc4000 bridge 4Ohm = can easily go over 3000W (i already used it and it kicks my RCF very well)
post #28 of 96
Oh yeah



Power cord is beefy!

post #29 of 96
Quote:
Originally Posted by johnplayerson View Post

People need to read the review. Apparently the original power cord on the crest amplifier was starving the unit, as it performed better with a power cord replacement yet. Why would any company with brains put an
inadequate cord on their amplifier.

The difference is an inaudible mere fraction of a decibel.

There will likely be more variance unit to unit ormore difference from the normal line voltage fluctuations thoughout the day and night than from the power cord. Besides, it sounds like there were several changes made in the AC mains wiring of the test setup so it's not clear this miniscule difference is actually the power cord or the combination of all the changes (more likely).

Additionally, power cords aren't sized for maximum test bench power / full rated sine wave output. The power cords are typically sized for the use of the amp, which is to reproduce music, which has a completely different, and considerably lower duty cycle than sine wave power tests. Full clean "music power" is equivalent to roughly 1/8 the full rated power of the amp so current draw under normal use is considerably less, thus any voltage drop in the power cord is also considably less.
post #30 of 96
Well, the changes I did in the test setup were done to show how a different cabling section can cause consistent diferrences also for short lenght; it is important to drive al this amps with power cables of proper section (2,5 mm2), specifically If you need to go some distance away from the power source.
Remember that some strings lower notes as well some vocal solo played loud could be considered almost like RMS testing.

Very good buy lukeamdman!!!!!
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