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Article: MartinLogan Motion 40i Review


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On 12/20/2019 at 8:02 PM, audiobomber said:

> "bi-wiring if one believes in such a thing"

 

Have you ever tried bi-wiring? It made a significant and easily noticeable difference in the two pairs of speakers I tried it on. The sound also changed when I single-wired with jumpers on the tweeters vs. jumpers on the woofers.

 

Martin Logan speakers would definitely rate a look if I were shopping. The price is reasonable and the AMT tweeter is an amazing device. Quite a few designs used an AMT at the Toronto audio fest. I'm not a fan of ported speakers either. I would want to block the ports and cross over to my subs.

 

I am not a fan of previous ML speakers. Crystalline highs but no body. 

Bi-wiring doesn’t really do anything positive. As far as cable is concerned, it’s like upping the gauge to the wire, but if you are splitting the woofer and tweeter by removing the shorting straps at the speakers and connecting them back together at the amplifier, all you are really doing is moving the place where the woofer and tweeter are joined from the back of the speaker with just a very short, low-resistance strap to a long, higher resistance cable. Sure it can change the sound, but I assure you it is subtracting something rather than adding anything. If you like that better, well, that’s up to you. But you really should know what’s actually going on. Also, while we’re on the subject, bi-amping a speaker that won’t let you bypass the built-in cross-overs, is also, mostly futile. For proper bi-amp performance you want a small signal crossover BEFORE the amplifiers. Now you’ve got the true advantages afforded by bi-amping! There is an exception to that. Even if you are stuck with the speaker’s built-in crossover, you will still get benefit if, for instance the two amplifiers you are using have vastly different sonic signatures. For instance, if you prefer the bass of a solid-state amp, you might want to put that on the woofer, but if you prefer the sweet open high-end often attributed to tubes, then you might want to use a good-sounding tube amp on the tweeter (perhaps even a low wattage SET).

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7 hours ago, Ralf11 said:

Dick Vandersteen likes bi-wiring...

I don’t think that changes the physics, do you? It has to take something away. I mean you have replaced a very short strap with a long piece of wire. That adds resistance, capacitance and  inductance. It has to change something, and since wire is passive, not active, it can only attenuate, not amplify. Therefore, some portion of the tweeter’s passband has to be attenuated. So, if Mr. Vandersteen or anyone else hear’s an improvement, it’s because they like a certain portion of the high frequency spectrum being reduced in volume. Am I not right?

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