Joined
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39 Posts
First let me say this is a great forum and the REW software is great.
Attached is my initial test using REW. 1/3 octave smoothing, RS Digital SPL meter, calibration files used, etc. Measurements are average of 3 positions across the couch in the main listening positions. When I set to 1/1 smoothing, graph results are almost identical (up to about 8kHz, then it rolls off a little) to my AudioControl RTA data of the same test environment, so I'm fairly confident on the calibration.
I have the SMS-1 parametric engaged and tone controls set to -1.5db on the treble. I have an Anthem D1 processor, ATI 3005 amps, and California Audio Technology 8.7 mains with s4 12" subs.
A picture of my room is also attached. Note the built-in nature does not allow any moving of speakers and my wife will not allow any treatments other that what you see (rugs, couches, irregular surfaces, etc.).
The dip you see at 50Hz is on purpose. I have a room mode at that frequency that really sticks out when you stand in certain places in the room so I attenuated it at the expense of the main listening position.
My main question is advice on adding parametric EQ (Rane PE 17s) on the mains. I would attenuate at about 245Hz (4.2Q) a collection of room modes, attenuate at about 780Hz (4.2Q) and boost at 1250Hz (6.0Q) and 3350Hz (7.0Q). With these filters, REW predicts there to then be a very smooth response. I will also try changing the capacitors on the crossover of mids/tweeter to smooth the dip at 3350Hz, since I think this developed after I padded the tweeter 4dB. This would be in lieu of the EQ boost at 3350Hz.
The Rane specs (120 dynamic range, 98db S/N and .005 THD) exceed digital recording and reproduction capabilities, so I should not be able to hear any ill effects.
Please give me your comments on my results and plans. Thanks!
Attached is my initial test using REW. 1/3 octave smoothing, RS Digital SPL meter, calibration files used, etc. Measurements are average of 3 positions across the couch in the main listening positions. When I set to 1/1 smoothing, graph results are almost identical (up to about 8kHz, then it rolls off a little) to my AudioControl RTA data of the same test environment, so I'm fairly confident on the calibration.
I have the SMS-1 parametric engaged and tone controls set to -1.5db on the treble. I have an Anthem D1 processor, ATI 3005 amps, and California Audio Technology 8.7 mains with s4 12" subs.
A picture of my room is also attached. Note the built-in nature does not allow any moving of speakers and my wife will not allow any treatments other that what you see (rugs, couches, irregular surfaces, etc.).
The dip you see at 50Hz is on purpose. I have a room mode at that frequency that really sticks out when you stand in certain places in the room so I attenuated it at the expense of the main listening position.
My main question is advice on adding parametric EQ (Rane PE 17s) on the mains. I would attenuate at about 245Hz (4.2Q) a collection of room modes, attenuate at about 780Hz (4.2Q) and boost at 1250Hz (6.0Q) and 3350Hz (7.0Q). With these filters, REW predicts there to then be a very smooth response. I will also try changing the capacitors on the crossover of mids/tweeter to smooth the dip at 3350Hz, since I think this developed after I padded the tweeter 4dB. This would be in lieu of the EQ boost at 3350Hz.
The Rane specs (120 dynamic range, 98db S/N and .005 THD) exceed digital recording and reproduction capabilities, so I should not be able to hear any ill effects.
Please give me your comments on my results and plans. Thanks!
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