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12-09-2013 08:57 AM - edited 12-09-2013 09:12 AM
I have run 3020s for many years during the late 80s and throughout the 90s, I also ran them with two bridged CS-800s all night long, held every ounce of it easily. 400watts program is the RMS value in music power which even at that is conservative. They held all of the 1000+watts of power to each I gave them running every genre of music out there. There has yet to be a single cabinet speaker system to beat them in my opinion. Now adays you have to make 10 trips to move everything that could equal the sound. I know this is an old thread, but dang, why cant Peavey make a great product once again. Now that technology is so much better, Imagine what they could make now.
One thing I did notice, was a mistake made by so many people among other DJ companies, is that they used too small of an amplifier, and constantly burned out the HT94s. They were clipping their amps constantly in larger venues, and they wondered why they were burning out those Super tweeters.
I never once had to replace a HT94 with my bridged setup. I felt sorry for the people driving speakers that required a big block engine, but the ignorant minds that used tiny single CS400 and CS800 amps. Its amazing how many do not realize that distortion from a low power amp kills more HT94s than too much power from a high power amp. I used and still do tell them, you wouldnt use a 4cylinder engine to pull a house, when it needs an 8cylinder.
It seems today, that is not a problem compare to yester-years amps. I would love to get my hands on a set of 3020HTs again, heck, I would settle for a 3020 or better yet, a 3624 from Sonic and do driver and crossover upgrades.
12-09-2013 09:01 AM
12-09-2013 09:13 AM - edited 12-09-2013 09:22 AM
The CS800 produced ~1050watts BRIDGED into 4ohms, 900 into 8 ohms that is how I ran them, and that is Spec per Peavey also. I read it with a meter to verify with students from University of Tennessee Electrical Engineering dept.
Please dont bash without realizing the information provided, which I guess could be an oversight on your part. It makes you have an unreliable knowledge base, which is the real disservice to everyone here.
12-09-2013 09:39 AM - edited 12-09-2013 05:28 PM
Yukki, the new versions are current limited into 2 ohm stereo (4 ohms bridged) in order to get higher 4 ohm power, though all versions i am aware of are rated much lower at 2 ohms than 4 ohms. The older versions do about 800 watts at 4 ohms bridged. This is for USA versions. Some versions do not support 4 ohm bridged as well for regulatory reasons primarily. I would not recommend bridging the cs800 into 4 ohms as well.
Newbies should not be so disrespectful when they come onto a new forum.
I looked at my service manuals and I am not mistaken...
The version from 1976 uses 5 output transistors per rail and uses essentially a single slope VI (essentially just a current limiter) set at roughly 2.5 amps per device (which matches pretty well with the devices SOA and amp's Vcc) for a maximum current of 12.5 amps peak or 9 amps RMS. Calculating this out, that's about 160 watts into 2 ohms, but with some slow-down caps and curve sloping & droop, I would expect that in practice to be a bit over 200 watts. As a check of this, it should do about 320 watts into 4 and factoring in the above adjustment it ends up around 400 watts which is what it's rated for.
Later versions used slightly lower rail voltages but slightly stiffer rails, they also use much better power transistors, only 4 per rail and a more sophisticated VI limiter allowing for slightly more power with 1 less transistor pair.
I designed my first power amp in 1980-81, so I am pretty familiar with what was happening around this time in power amp technology. Today's devices, as well as a better understanding of device behavour and new operating classes have allowed us to get considerably more real world power out of 4 pair of devices.
12-10-2013 08:13 PM
I used 3020's pretty regularly back in the 90's they were in just about every tacoma club in the late 80's and 90's.( seriously, tacoma had alot of these for some reason) honestly I thought they sounded just OK and were heavey. Every single one I used had a blown ht-94. guys used to love to hang them with chain in the handles, they were lucky not ever fell. They got loud but didnt really have any projection out side with the small horns, I think Amercan music or Olympic lighting had some copies with a 2" Ev or JBL ( or both) they used for some festivals. Most of them were underpowered. At one point I almost bought a set but talked myself out of them. Ithink i bought some early HDH boxes instead