Keith_W's latest activity
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Keith_W replied to the thread External Signal Mode.Would he be able to use the RTA John? -
Keith_W replied to the thread Polarity anomaly - UMIK-1 vs. UMIK-2.How to test if your mic has correct polarity or not: Step 1: Take a speaker driver and a 1.5V battery. Connect the red input to + and...
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One common cause of low end roll-offs in measurements is Windows doing noise cancellation processing on the input. Mics may have the...
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Keith_W replied to the thread Why not linear phase?.A perfect Dirac pulse is impossible since it infinitely short and its integral over time is equal to 1. However, you can approximate it...
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Keith_W replied to the thread Help: Why use a 20k Sweep for a Sub, and not just 20-80Hz?.Something has gone awry with your volume matching. If you use an SPL meter to volume match your sub to your main speakers with pink...
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Keith_W replied to the thread Crossover, speaker alignment, room equalization - what do I start with?.True pre-ringing is a reversed copy of whatever you are trying to correct occurring before the main impulse. I uploaded an example into...
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Keith_W replied to the thread Crossover, speaker alignment, room equalization - what do I start with?.Cool! If you don't hear a problem, then there is no problem.
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Keith_W replied to the thread Why not linear phase?.It's called "rePhase". John has previously said elsewhere that he does not see the point in duplicating the work. And if you feel like...
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Keith_W replied to the thread Crossover, speaker alignment, room equalization - what do I start with?.Why wait for me? :innocent: You saw it first! Anyway let's have a look. Here is a more sensible zoom of your FR with subwoofer (red)...
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Keith_W replied to the thread Crossover, speaker alignment, room equalization - what do I start with?.Your graph is too zoomed out to see anything at all. Please show a 50dB vertical scale.
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Keith_W replied to the thread Strange curve with REW....You have likely made an error with your measurement. You are also displaying your frequency response too zoomed out. Please read Book 1...
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Keith_W replied to the thread Trying to fix possible bass null in my room - help please.After thinking about it a bit, you are probably correct. That subwoofer IR is "hanging" somewhere in time with no time reference, so it...
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Keith_W replied to the thread Trying to fix possible bass null in my room - help please.The subwoofer and main speaker come off the same DAC channel and are therefore, synchronized.
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Keith_W replied to the thread Trying to fix possible bass null in my room - help please.You're welcome. Re: crackling. You need to make sure it's crackling you are talking about, and not stuttering. Stuttering = digital...
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Keith_W replied to the thread Trying to fix possible bass null in my room - help please.Anyway, first things first. Let's look at the controls available to you: All you have available is (1) volume (2) XO point (3) phase...
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