Good Afternoon All,
I'm new to measuring speakers, and i've been measuring a lot of guitar speakers recently with ARTA using Impulse Responses. I'm consistently getting a mid hump in the 400-1200hz range that is much higher than the manufactures posted results. It's so consistent, I feel like it's a measurement error, but I also don't fully trust the manufacturers posted results either. Hopefully someone has ran into this before or has some insight into what I can check into as far as setting or what not.
Attached are several examples comparing the measured vs. manufacturer results (please ignore dB as I didn't scale these). I have a couple other examples beyond these that are exactly the same. Also, for the hell of it, I measured a KEF LS50 and somehow measured relatively flat (no blended near field). Below is my set-up, hopefully someone can help me out here.
Focusrite 2i2 - Single Channel Measurement
Dayton 75w Power Amp - Have tried 2 other power amps with the same results
Dayton EMM-6 Mic - Compensation Loaded in ARTA (Also tried a DBX mic with same result)
Baffle - Same 2' x 2' for all speakers
Room - All of them in my house.... Including a 24' x 24' living room
ARTA Set-Up - Followed the instructions and Charlie Laub's white paper
Thanks,
Jason
I'm new to measuring speakers, and i've been measuring a lot of guitar speakers recently with ARTA using Impulse Responses. I'm consistently getting a mid hump in the 400-1200hz range that is much higher than the manufactures posted results. It's so consistent, I feel like it's a measurement error, but I also don't fully trust the manufacturers posted results either. Hopefully someone has ran into this before or has some insight into what I can check into as far as setting or what not.
Attached are several examples comparing the measured vs. manufacturer results (please ignore dB as I didn't scale these). I have a couple other examples beyond these that are exactly the same. Also, for the hell of it, I measured a KEF LS50 and somehow measured relatively flat (no blended near field). Below is my set-up, hopefully someone can help me out here.
Focusrite 2i2 - Single Channel Measurement
Dayton 75w Power Amp - Have tried 2 other power amps with the same results
Dayton EMM-6 Mic - Compensation Loaded in ARTA (Also tried a DBX mic with same result)
Baffle - Same 2' x 2' for all speakers
Room - All of them in my house.... Including a 24' x 24' living room
ARTA Set-Up - Followed the instructions and Charlie Laub's white paper
Thanks,
Jason
Attachments
I use a Focusrite 2i2 too. I use one input and output channel for my measurement and I use a loopback cable to loop the other channel. I believe this will give you a kind of pseudo 2-ch measurement mode.
I don't think doing this will help solve your measurement hump however.
What's your mic distance from your speaker baffle? Are you using a good sealed box for the measurements or an open baffle?
I don't think doing this will help solve your measurement hump however.
What's your mic distance from your speaker baffle? Are you using a good sealed box for the measurements or an open baffle?
Yes, I have a Mesa 1x12" closed back loaded with a Celestion Vintage 30. Measured it both closed and open and the closed appears to only fill in the low end. The mid bump is really pronounced with the Mesa sourced Vintage 30's
See attached pictures for the measurements.
Note, these are blended responses using near and far field measurements per the Bagby White Paper & Blender.
Thanks,
Jason
See attached pictures for the measurements.
Note, these are blended responses using near and far field measurements per the Bagby White Paper & Blender.
Thanks,
Jason
