Need more info on the Electron Kinetics Eagle-7A

Sean- I don't understand why you want to put down an amp you haven't heard. Yes, it didn't test well, but even Mr.Cheney feels it sounds really good. For those who are interested, here's part of his comments(the rest can be found on Audiocircle.com):

Brian Cheney-subject: ZR 1600 comparitive listening tests:

"I'm not going to keep you in suspense: this amplifier has a sensational sound and is all the web buzz cracks it up to be, and more."

Carver Professional is a division of Phoenix Gold International, they have never claimed to have anything do with Bob Carver. They bought the name just like Superscope did when they bought the Marantz name in 1964, and just like Philips did in 1980, when Superscope sold them its shares of Marantz Japan.

Rick- when I owned the RS-1 B, I had a ARC D79B on the panels and Electron Kinetic Eagle 7A on the bass towers and there was no hum.

After reading your post again, I suggest that with the power off, you gently push on the center each woofer in the right tower and see if you hear any scrapping noise. You may have a woofer(s) with the voice coil out of aliment, which could be making the "sneakers of a gym floor" noise when the servo control powers up. Aloha, Kana.

Kana: My comments are not only based on the technical measurements that John Curl obtained when testing this unit, but the suitability of this product for Rick's specific intended use.

From my past experience with the Perreaux 2150's, these amps typically clip in excess of 250 wpc @ 8 ohms and 400+ wpc @ 4 ohms. The 3150 is a far beefier amp with much greater bottom end authority, as Rick will confirm. While i can't explain the specific problems that he's having, my guess is that the Carver Pro might not solve the problem and would probably be a step backwards in terms of bass output and control.

The fact that the ZR 1600 was breaking up / oscillating at less than 200 wpc @ 8 ohms ( John measured 180 wpc into a dummy load ) would mean that it would probably perform even worse with a more reactive, far lower impedance load. Comparing that to the "real" 500+ wpc that the 3150 is capable of into 4 ohm loads or even the 400 wpc that the 2150 was offering should demonstrate why i have the thoughts that i do.

As a side note judging by what Rick and i discussed on the phone, i don't think that he's unhappy with the performance of the 3150. From what i gathered, i think that his main problem is the hum and other "odd" noise being generated with it in the system. If he could solve this problem, i think that he would prefer to run what he already has. I could be wrong, but that's what i was led to believe. Sean
>

I had several of John Iverson's amps including the Electro Research and the Eagle 7s. This was a long time ago, however, and regardless of how good I found them then, they are probably surpassed today. For example I use a Citation 7.1 four channel amp on my subwoofers. I bridge the left and right two channels. I had actually looked for my old Eagles when I needed a subwoofer amp, but could not find them.

John's amps are rather straight-forward so I think someone competent in circuits could repair them.

Hi all....just an update and again.....Thank you all for chiming in.
Sean you are correct with regard to my admiration for the Perreaux 3150B. If I can fix the two problems...this is the amp form my bass columns. It has the weights and control to offer a concert hall realism to music.
Now to some of your questions and some comments.

Yes, I do float the ground. I also tried direct into the wall and unfloating the groung.....still the problems.

As to the woofer columns and Kana's suggestion about pressing the woofer's to see if the noise appears.....that I will try. However, this "sneaker to gym floor noise", sort of a squeak, happens intermittently with or with any music playing. It also appears, for a second, when I turn on the amp. Then it goes away.

My biggest concern is that this does not happen whether 2150B is installed. So if it was a problem with the servo control on the Infinity, wouldn't it be doing the same problem with the 2150B???

Again, thanks all and Sean I will read up on your thread. I still would love to offer you a great Italian dinner to coax you over for a visit and "repair".......????

Hi all....just an update and again.....Thank you, all for chiming in.
Sean you are correct with regard to my admiration for the Perreaux 3150B. If I can fix the two problems...this is the amp form my bass columns. It has the weights and control to offer a concert hall realism to music.
Now to some of your questions and some comments.

Yes, I do float the ground. I also tried direct into the wall and unfloating the groung.....still the problems.

As to the woofer columns and Kana's suggestion about pressing the woofer's to see if the noise appears.....that I will try. However, this "sneaker to gym floor noise", sort of a squeak, happens intermittently with or with any music playing. It also appears, for a second, when I turn on the amp. Then it goes away.

My biggest concern is that this does not happen whether 2150B is installed. So if it was a problem with the servo control on the Infinity, wouldn't it be doing the same problem with the 2150B???

Again, thanks all and Sean I will read up on your thread. I still would love to offer you a great Italian dinner to coax you over for a visit and "repair".......????