How good is the crossover in your loudspeakers?
I just watched a Danny Richie YouTube video from three weeks ago (linked below). Danny is the owner/designer of GR Research, a company that caters to the DIY loudspeaker community. He designs and sells kits that contain the drivers and crossover schematics to his loudspeakers, to hi-fi enthusiasts who are willing and able to build their own enclosures (though he also has a few cabinet makers who will do it for you if you are willing to pay them to do so).
Danny has also designed crossovers for loudspeaker companies who lack his crossover design knowledge. In addition, he offers a service to consumers who, while liking some aspects of the sound of their loudspeakers, find some degree of fault in those loudspeakers, faults Danny offers to try to eliminate. Send Danny one of your loudspeakers, and he will free of charge do a complete evaluation of it's design. If his evaluation reveals design faults (almost always crossover related) he is able to cure, he offers a crossover upgrade kit as a product.
Some make the case that Danny will of course find fault in the designs of others, in an attempt to sell you one of his loudspeaker kits. A reasonable accusation, were it not for the fact that---for instance---in this particular video (an examination of an Eggleston model) Danny makes Eggleston an offer to drop into the company headquarters and help them correct the glaring faults he found in the crossover design of the Eggleston loudspeaker a customer sent him.
Even if you are skeptical---ESPECIALLY if you are---why not give the video a viewing? Like the loudspeaker evaluation, it's free.
https://youtu.be/1wF-DEEXv64?si=tmd6JI3DFBq8GAjK&t=1
And for owners of other loudspeakers, there are a number of other GR Research videos in which other models are evaluated.
@waytoomuchstuff Wrote:
JBL measured the frequency response of my speakers @ 1 watt @ 10 watts and @ 100 watts and they have <1 dB compression of SPL output. See speaker specifications here last page. Mike |
"JBL measured the frequency response of my speakers @ 1 watt @ 10 watts and @ 100 watts and they have <1 dB compression of SPL output. See speaker specifications here last page. That's excellent! JBL is noted for this. Along with their uniform off axis response. Not always the case with other brands. |
"JBL measured the frequency response of my speakers @ 1 watt @ 10 watts and @ 100 watts and they have <1 dB compression of SPL output. See speaker specifications here last page. Mike"
I don’t think this means what you think it means.
I think what is referred to is the power linearity over the frequency response and they show plots of the response for the three power levels and look at the response to see that it does not so as to throw the curve off by more than 1 dB. Otherwise, why are the three curves not 10 dB apart for the three power levels? OTOH, I would think that depending on the "compatibility" of the components, lesser speakers would show far more "areas" of compression because some components just can't "keep up" with others when the going gets tough.
They say they are 10 dB apart, but that would infer NO compression and that’s just not the case.
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BTW, JBL does note the dynamic compression for a 2226H at 1.5 dB between 1 watt and 100 watts. The 2226H uses the vented gap technology, same as my 2241H, and JBL notes that this measure was instituted to reduce the power compression. "JBL introduced the VGC products in an effort to reduce dynamic compression to even lower degrees and increase general power handling in the process. Figure 7 shows 1 watt and 100 watt superimposed compression curves for the JBL 2226H The curves show compression on the order of 1.5 dB over the range from 100 Hz to about 2 kHz, with virtually no compression at lower frequencies." Based on this, one would expect the 2234/2235 to exhibit more compression than the 2226H, though none of the literature states what it is. |
