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Loudspeaker EQ

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Fatmangolf View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 27 Nov 2016 at 2:51pm
In the end I kept the HF and MF switching apart. on midrange I went for 0dB (stock wiring), +1dB (10R in parallel), and +1.8dB (4R7 in parallel).
I have also been having a first stab at blending my big REL subwoofer in with the GX300's. Their Fb is about 32 Hertz so they go quite low to start with. Their reflex design has a faster roll-off, typically 24dB/octave so blending my main subwoofer will be interesting. When the reflex port is plugged on each box plugged they are closed boxes with a Qtc of about 0.7 and Fc=58 Hertz, handy because their rolloff is just under 12dB/octave which is the slope of the REL's low pas filter. So it should be easier to blend.
 
I soldered up a high level cable for the REL, spades for speaker terminals and Speakon to go into the Q400's socket. Then followed the usual set up procedure: start with sub crossover and level to high, switch phase from 0 to 180 to find which setting is loudest. In theory I would set the sub's LPF on the speaker's -6dB frequency (about 42 for closed box, 32 for reflex), but it's a relatively small listening room of 40 m3. My conclusion this time was I preferred the GX300's alone!
 
Jon

Open mind and ears, whilst owning GSP Genera, Accession, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Drewan77 Quote  Post ReplyReply Direct Link To This Post Posted: 27 Nov 2016 at 4:30pm
If you have a mic to measure and can set time delays on the sub (example below: main speakers +2 subs), it does make a big difference Jon...

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Fatmangolf View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 27 Nov 2016 at 6:00pm
Yes I agree Andrew. I think I wrote on the forum about my past efforts measuring with REW to generate EQ solutions for an old Behringer digital unit I pressed into service to feed my subs when I had the GX100's at the front. I had to get the MIDI cables out! Shocked
Jon

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2017 at 5:37am
I revisited my work on the GX300 crossover in Spring 2017, finding the mid-boost feature was helpful on some congested mixes. I found the +1dB quite subtle and going straight to +2dB made them more like monitors but a bit full-on for relaxed listening! So I am thinking about resusing the switch but for one boost in between and trying a cut option. I may try +/- 1.5dB

The sub-bass I have addressed by trying positions nearer the back wall and prefer the sound to blending in a subwoofer in my room. Changing from spikes has helped too.

After a lot of experimenting I splashed out for a set of Gaia III isolation feet and am very glad I did. Significant improvement in the sound, clearer with more precise positioning of instruments, and better bottom end which I put down to the floorboards not joining in!



Edited by Fatmangolf - 09 Nov 2017 at 5:45am
Jon

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Post Options Post Options   Thanks (0) Thanks(0)   Quote ICL1P Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2017 at 8:23am
Originally posted by Fatmangolf Fatmangolf wrote:


After a lot of experimenting I splashed out for a set of Gaia III isolation feet and am very glad I did.


Do they just screw in in place of the spikes?
Ifor
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Fatmangolf View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2017 at 6:01pm
Yes if you have M8 standard spike fittings or M6 or 1/4 inch, which are all in the box. The GX300 have an odd pitched M10 so I improvised.
 
Jon

Open mind and ears, whilst owning GSP Genera, Accession, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ICL1P Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2017 at 9:06pm
They are horrendously expensive. £400 for a pair of speakers!
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