bear
Responses from bear
| Novice attempting to bi-amp. Help Choose wisely, Luke Skywalker! That's the best advice for bi-amping. I would NOT use Carver amps at all for anything except maybe Sub Bass. Why? Because they are not particularly low in distortion or pleasing in subjective quality to my ears... Ha... | |
| Please help me to interpret these charts. To my eye the area in the Revel about 15kHz is of concern, it shows a nice peak there - which to me is often heard as annoying. Also the Revel has something of an impedance rise at the midrange crossover point as well as an overall rise as the twe... | |
| Could a speaker attenuator substitute for a preamp The problem with using *speaker* level controls is that they go between the amp and the speaker and are an impedance. This means that your damping factor will be one (DF = 1).In the case of your Klipsh, that might be an advantage, but probably not... | |
| ZERO Feedback talk. Monarchy amps. Be careful about negative feedback. I do not believe that the Monarchy amps have no negative feedback, nor the Krells.It is possible to build an amp with no overall LOOP feedback but that requires either "local" loop feedback or else multiple stag... | |
| pure class A? Oh yeah - more on "linearity"If you look at the transfer curve of any device, they tend to be most linear (straight line) in the middle of the curve. That means that for a given input increase, the output changes the same amount for each increase/... | |
| pure class A? Oh, I meant class D, not G or H... I think.I think Class H is that switched rail thing, like Carver?And D is switchmode.That leaves G... hmmmm...Guess I have to get a newer text book, eh? Maybe it's time to get those straight in my mind. | |
| What kind of power wakes up electrostatic speakers Yeah... and I looked around for my original brochure and can't seem to find it...If the curve is the same, then it would explain a lot about why some amps don't do well on the Acoustats...My recollection was different, but I have not seen that bro... | |
| pure class A? All "single ended" amplifiers are by definition Class A,if they are high-fidelity amplifiers.All that single ended means is that the amplifying element(tube or transistor) is alone, and not in push-pull. So,this means that it is starting out, when... | |
| What kind of power wakes up electrostatic speakers Sean, which Acoustat?? All of the Acoustats that used the 121 type interface - that included the II,III, IV, VI, VIIsabsolutely do NOT have any impedance dip below 6 ohms. I am not convinced that any did, unless they stopped using Jim Strickland's... | |
| What kind of power wakes up electrostatic speakers The Innersound amps are pretty nice for the $$... you mightresearch their heritage though...There are several ESLs with a benign load impedance curve. The Acoustat stands out as one without any dips below 6 ohms. It all depends upon the drive circ... | |
| What kind of power wakes up electrostatic speakers It's really not watts or amps but volts. ESLs are mostly voltage driven devices. However, there is a reactive impedance due to the fact that they are really just capacitors (impedance drops with increasing frequency) that are driven by transformer... | |
| Class A/B switching cause sonic problems? No doubt that "crossover distortion" in A/B amps is a problem.How big a problem is open to debate. In a well designed power amp it tends to be a small problem that may or may not be easy to identify except by really serious measurements. One poste... | |
| has anybody done a a/b test with the Crown Macro, Even so, it is arguably the best SUBWOOFER amp ever made. It has an outrageous DF, and a huge current reserve so it is great for hauling around woofers with accuracy.The sound you get from it in "normal" listening *might* be variable, since they a... | |
| Active crossovers Let's be clear, these are LEVEL controls, NOT "gain" controls!!We call them "gain" but 99% of the time they set the output level of a fixed gain circuit. To change the gain of a typical solid state circuit you need to change the feedback resistor.... | |
| Aren't passive radiators out of phase? The volume of the cabinet is a spring - while the property of the PR is mostly mass. The whole thing is merely a relatively simple resonant system. Of course there are losses and interactions and the issue of "Q" (the bandwidth of a resonance comp... |