audiokinesis
Responses from audiokinesis
| sub woofer efficiency I agree with Johnk that finding a sub that will match level-wise isn't going to be difficult. Subs typically have built-in amplifiers that have lot of gain, so the actual electrical efficiency of the woofer isn't an issue because they're designed ... | |
| Adding a Subwoofer to Khorns In the bass region, the room dominates the low frequency presentation. Relatively minor differences between quality subwoofers pale in comparision to the large peaks and dips that the room imposes. So my suggestion is to consider the room to be ve... | |
| Using a 15 inch woofer to do mid range Assuming a high quality woofer and good crossover design, a 1000 Hz crossover is appropriate for a 15" woofer and 90 degree horn. Altec used a 1200 Hz crossover for the 15" woofer and horn in their epic Model 19, which was said to be a significant... | |
| Crossover designs... In the real world, relatively few crossovers nicely fit an established model, such as "4th order Linkwitz-Riley". In most cases, due to the non-textbook behavior of the drivers, a non-textbook crossover works best. Having heard good and bad speake... | |
| Subs & Group Delay Acoustat6, sorry this reply is late; I've been on the road and haven't logged in since, oh, some time last year.Anyway, it's hard to say that a given frequency response specification is a guarantee of good sound. It really depends on how it was me... | |
| sealed vs vented subwoofers Stanwal, I almost agree with your statement about the failure of measurements to correlate with subjective preference. I think it's fair to say that the audio industry has been measuring distortions that are easy to measure instead of measuring di... | |
| Subs & Group Delay Low-order harmonic distortion is benign. I'm aware of a controlled listening test in which 30% second harmonic distortion was statistically undetectable - so don't go nuts pursuing low harmonic distortion specs.Group delay typical of a vented woof... | |
| sealed vs vented subwoofers Shadorne - my bad! You are absolutely right; sealed boxes have LESS group delay than vented boxes. I was thinking that, but carelessly typed the exact opposite.That first sentence should read:"A sealed box will have less group delay than a vented ... | |
| sealed vs vented subwoofers For some reason the full link did not appear in my post above. From where that link takes you, scroll down to post number 19.Duke | |
| sealed vs vented subwoofers A sealed box will have more group delay than a vented box because it has a 4th order rolloff below system resonance, rather than the approximately 2nd order rolloff of a venteed box. However, the audibility of group delay at low frequencies has no... | |
| sealed vs vented subwoofers I believe that the room plays a dominant role in the bass region, and one of the things that rooms tend to do is boost the very deep bass due to boundary reinforcement. A sealed box sub generally gives better synergy with this room-acoustic effect... | |
| Stereo Subs - Do they need to be identical? In some cases, the quarter-wave cancellation from the bounce off the rear wall can be taken advantage of to tame a peak. As for asymmetrical placement, here's a link to a brief informal paper by one of the leading researchers in psychoacoustics, E... | |
| Stereo Subs - Do they need to be identical? I would say that... it depends. In my opinion the goal is to get a smooth in-room response in the bass region, and a smooth (perceptually seamless) blend with the main speakers. Depending mainly on the frequency response characteristics of the sub... | |
| 2-way vs. 3-way In my opinion the basic concept and format of the model 4430 is sheer genius. It elegantly addresses several significant issues, some of which are still virtually ignored by most of the high-end audio world. Briefly, the 4430 uses a large-diameter... | |
| Excessive Midrange Energy? Hard to say what's going on with the speakers without a rather comprehensive set of measurements. What you are hearing might be something that can be addressed in the crossover, but some things simply cannot be. Sorry I know that doesn't help much... |