Finally finished a couple on going projects.
I built a 4-Tempest IB several months ago. I picked up a used Symetrix 551 parametric eq on E-bay. Using Trueaudio's RTA, a friends Audio Control mic/preamp, and various test cd's I adjusted the eq. Thomas warned me the Symetrix is a bear to adjust. He is right, little turns of the little knobs make a huge jump. I spent about 4 hours adjusting the eq. Once I got the eq set, I put a little dab of silicone on each knob so the knobs can't be moved accidenally. I was able to get the frequency response fairly flat from 14-150hz. I read a post that Jon suggested to eq sub(s) an octave above the x-over point, which I did. I've been extremely happy with the sound quality of the IB, the EQ brought it up another notch. One kind of interesting find when going thru eq adjusting is how our house gets excited at 16hz, it's amazing how things in he house started moving around at that fz.
The other project I finished was a center channel speaker. It's a W-M/T-W configuration consisting of 2-Eton 8-800's, MB midrange, and a Focal TC120. It certainly can't be classified as a small speaker. It's OD is 12x30x16. Cabinet is 1 inch MDF, 2 inch front, and lots of oak bracing. I played white noise thru it for a couple days at a moderate level to break it in. I spent quite a bit of time listening to CD's in mono. It sounds great, voices sound very natural. Listening to James McMurtry's "Too Long In The Waste land" Angeline, the speaker really captures his "chesty" voice. I then hooked it up as a center speaker. Playing a movie I've seen many times, "Fargo", I heard things I haven't heard before. Early in the movie when she tries to start her prowler, I could hear the car turning over, I did not hear that on my $500 NHT center. I'm very happy with my new center! A big thanks goes out to Jon and Thomas for their help with this project.
Kevin
I built a 4-Tempest IB several months ago. I picked up a used Symetrix 551 parametric eq on E-bay. Using Trueaudio's RTA, a friends Audio Control mic/preamp, and various test cd's I adjusted the eq. Thomas warned me the Symetrix is a bear to adjust. He is right, little turns of the little knobs make a huge jump. I spent about 4 hours adjusting the eq. Once I got the eq set, I put a little dab of silicone on each knob so the knobs can't be moved accidenally. I was able to get the frequency response fairly flat from 14-150hz. I read a post that Jon suggested to eq sub(s) an octave above the x-over point, which I did. I've been extremely happy with the sound quality of the IB, the EQ brought it up another notch. One kind of interesting find when going thru eq adjusting is how our house gets excited at 16hz, it's amazing how things in he house started moving around at that fz.
The other project I finished was a center channel speaker. It's a W-M/T-W configuration consisting of 2-Eton 8-800's, MB midrange, and a Focal TC120. It certainly can't be classified as a small speaker. It's OD is 12x30x16. Cabinet is 1 inch MDF, 2 inch front, and lots of oak bracing. I played white noise thru it for a couple days at a moderate level to break it in. I spent quite a bit of time listening to CD's in mono. It sounds great, voices sound very natural. Listening to James McMurtry's "Too Long In The Waste land" Angeline, the speaker really captures his "chesty" voice. I then hooked it up as a center speaker. Playing a movie I've seen many times, "Fargo", I heard things I haven't heard before. Early in the movie when she tries to start her prowler, I could hear the car turning over, I did not hear that on my $500 NHT center. I'm very happy with my new center! A big thanks goes out to Jon and Thomas for their help with this project.
Kevin
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