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Fatmangolf wrote:
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Loudspeaker EQ |
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Fatmangolf 
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Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8396 |
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 Posted: 27 Nov 2016 at 2:51pm |
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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! |
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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Drewan77
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Joined: 25 May 2013 Location: Chester,England Status: Offline Points: 1544 |
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Posted: 27 Nov 2016 at 4:30pm |
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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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Older than I once was, younger than I'll be
............................. Andrew |
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Fatmangolf
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Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8396 |
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Posted: 27 Nov 2016 at 6:00pm |
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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!
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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Fatmangolf
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Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8396 |
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Posted: 09 Nov 2017 at 5:37am |
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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 |
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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ICL1P
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Joined: 04 Aug 2012 Location: Faringdon, Oxon Status: Offline Points: 2310 |
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Posted: 09 Nov 2017 at 8:23am |
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Ifor
===== Reflex M & ACCESSION M, CuSat50, Majestic DAC, a Proprius pair. |
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Fatmangolf
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Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8396 |
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Posted: 09 Nov 2017 at 6:01pm |
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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.
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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ICL1P
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Joined: 04 Aug 2012 Location: Faringdon, Oxon Status: Offline Points: 2310 |
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Posted: 09 Nov 2017 at 9:06pm |
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They are horrendously expensive. £400 for a pair of speakers!
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Ifor
===== Reflex M & ACCESSION M, CuSat50, Majestic DAC, a Proprius pair. |
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