Soulution Amps

[Car commander]

Well I bought a demo 720/710 set up today. I guess we will see.

[Masterlu]

Originally Posted by Car commander

Well I bought a demo 720/710 set up today. I guess we will see.

Jim... Big Congrad's!

[bvdiman]

Originally Posted by Car commander

Well I bought a demo 720/710 set up today. I guess we will see.

Congrats! nice combo which will synergize well with rest of your stuffs..

*err.. don't try the 711

[Car commander]

My personal pain threshold does not lend itself to 45k preamps or amps . I am already insane.

[Car commander]

Originally Posted by Masterlu

Jim... Big Congrad's!

Thank you for your advice.

[Masterlu]

Originally Posted by Car commander

Thank you for your advice.

[cmarin]

Originally Posted by Car commander

Well I bought a demo 720/710 set up today. I guess we will see.

Congrats on the acquisition of the 720/710 combo!

You don't have to spend tons of $$$ to experience the new 725/711 combo. Ask you dealer if there are options to upgrade your 720/710s.

The incremental improvement of the 711 over the 710 is impressive. I haven't heard the new 725, but if it's anything like the 711's, it's well worth it.

[Car commander]

Let's see if I like them as is. The architecture has changed and they would probably have to go back to Switzerland. I wouldn't pay 10k to get 1 percent. I am going to try each component individually first. Just to see.

It's fun to play but with 160 pound amps it get tedious.

[wizard]

Tech talk:

First the input stage voltage amplifier which has a cut-off frequency of 80 megahertz, and is then subdivided into:

A error amp that receives the feedback signal, but will not contribute to the amplification.
And the actual zero-feedback with 20x voltage amplification.

The output current stage comprises 14 bipolar power transistors per channel, all mounted onto a massive copper rail which is temperature controlled for a constant quiescent current. The soulution 711‘s impressive low level signal handling is reflected in its raw power delivery. Current levels of 120A and more are readily attainable.

There's no global/overall feedback in any Soulution amps.


From TAS:

"This speed or bandwidth has nothing to do with the MHz-range frequencies that can be reproduced by such an amplifier; the bandwidth is required to make the “feedback loops” of solid-state designs work properly. “Feedback loops” compare the amplified music signal at the output with the input signal. Due to the fact that the music signal is constantly changing, the time delay (propagation delay) of the amplifier must be zero; otherwise, applying feedback will add timing errors to the music signal. In other words, if the propagation delay is not zero or close to zero the “feedback loop” will be comparing apples at the output to oranges at the input.

Big solid-state amplifiers can have propagation delays of 1–5 microseconds. Now, the period of a 20kHz sine wave is 50 microseconds. Under these conditions such timing errors are significant—and they get even worse for higher frequencies. The Soulution amplifiers work with an overall propagation delay of 5–10 nanoseconds. This is up to 1000 times faster than other amplifiers. The voltage amplification stage—where we apply the most negative feedback—runs at 80MHz bandwidth and has a propagation delay of 1–2 nanoseconds. Since the timing errors of the Soulution amplifiers are negligible, this gives us the opportunity to apply as much negative “feedback” as we need wherever it is required in the amplifier without reducing sonic performance. This is how we can lower distortion to never-before-seen levels."

[cmarin]

Originally Posted by Car commander

Let's see if I like them as is. The architecture has changed and they would probably have to go back to Switzerland. I wouldn't pay 10k to get 1 percent. I am going to try each component individually first. Just to see. It's fun to play but with 160 pound amps it get tedious.

you'll like them as is.