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<blockquote data-quote="MarcelGous" data-source="post: 8787132" data-attributes="member: 685770"><p>Good Day All</p><p></p><p>So i took my 2012 Audi Q7 to a reputable car audio installer here in my country, but was extremely disappointed when i left the shop.</p><p></p><p>Audio screen was replaced with a aftermarket android unit and a Hi-Low converter was added for signal to the amp (this was due them not getting signal from the Android unit)</p><p></p><p>So when they finally connected the sub there was no signal coming to the sub, they then found that the Converter was completely turned down, i asked the installer if they now set the converter to 2v based on a 40hz signal with the radio turned up 3/4 of they way?</p><p></p><p>They said no, they just turn it half way open . . . . . .i then asked them how do they set the amp? Where i got a response of they set the gain and everything by ear. . .</p><p></p><p></p><p>Basically I'm not happy with the bass I'm getting at all from the setup and wanted to check the tuning myself, however for some odd reason i get no voltage on my multimeter when connected to the speaker output on the amp. The bass sound hollow and there is now low end frequency bass that's expected </p><p></p><p>I cant run a 40hz frequency long seeing as i don't know where to disconnect my factory speakers so they don't get damaged while testing on the amp</p><p></p><p>Currently setup</p><ul> <li data-xf-list-type="ul">Android radio</li> <li data-xf-list-type="ul">OEM speakers running from the Audi media drive</li> <li data-xf-list-type="ul">Energy Audio Champ mono amp 720w RMS @ 2ohm</li> <li data-xf-list-type="ul">PAC-LP7 converter</li> <li data-xf-list-type="ul">Kicker 48trtp122 - 12" sub - 500w RMS @ 2ohm (Frequency range 25 -500hz)</li> </ul><p></p><p>I purchased a oscilloscope, but it will only arrive mid to end May so its an extremely long time still.</p><p></p><p>Current plan of action:</p><p></p><p>1) Test distortion from radio by tapping into the speaker wires in order to find highest volume with clean signal</p><p>2) Test the Loc converter to insure its set to a 2v output when receiving a consent 40hz signal from the radio (should this be done on 0db or -5db?)</p><p>3) Set gain on amplifier with oscilloscope while receiving a consent 40hz signal from the radio and LOC</p><p>4) Try and set the crossovers (sub sonic to about 25hz and LPF set to 90hz) this is if i find out how to actually do this with the dial only displaying max and min values</p><p>5) Keep Bass Boost to 0db and keep Phase shift on 0</p><p></p><p>My bass control knob will be set on full while i do the above seeing as i would like to turn the bass down if needed but i must never be able to turn it louder than the max set value to avoid clipping.</p><p></p><p>The one thing i don't know would be the frequency range of the speaker wire they tapped into for the LOC, i believe they must have tapped into the from door woofers so it would be a low end frequency right? would this change anything on how i set my LOC?</p><p></p><p></p><p>Any advice would be greatly appreciated</p></blockquote><p></p>
[QUOTE="MarcelGous, post: 8787132, member: 685770"] Good Day All So i took my 2012 Audi Q7 to a reputable car audio installer here in my country, but was extremely disappointed when i left the shop. Audio screen was replaced with a aftermarket android unit and a Hi-Low converter was added for signal to the amp (this was due them not getting signal from the Android unit) So when they finally connected the sub there was no signal coming to the sub, they then found that the Converter was completely turned down, i asked the installer if they now set the converter to 2v based on a 40hz signal with the radio turned up 3/4 of they way? They said no, they just turn it half way open . . . . . .i then asked them how do they set the amp? Where i got a response of they set the gain and everything by ear. . . Basically I'm not happy with the bass I'm getting at all from the setup and wanted to check the tuning myself, however for some odd reason i get no voltage on my multimeter when connected to the speaker output on the amp. The bass sound hollow and there is now low end frequency bass that's expected I cant run a 40hz frequency long seeing as i don't know where to disconnect my factory speakers so they don't get damaged while testing on the amp Currently setup [LIST] [*]Android radio [*]OEM speakers running from the Audi media drive [*]Energy Audio Champ mono amp 720w RMS @ 2ohm [*]PAC-LP7 converter [*]Kicker 48trtp122 - 12" sub - 500w RMS @ 2ohm (Frequency range 25 -500hz) [/LIST] I purchased a oscilloscope, but it will only arrive mid to end May so its an extremely long time still. Current plan of action: 1) Test distortion from radio by tapping into the speaker wires in order to find highest volume with clean signal 2) Test the Loc converter to insure its set to a 2v output when receiving a consent 40hz signal from the radio (should this be done on 0db or -5db?) 3) Set gain on amplifier with oscilloscope while receiving a consent 40hz signal from the radio and LOC 4) Try and set the crossovers (sub sonic to about 25hz and LPF set to 90hz) this is if i find out how to actually do this with the dial only displaying max and min values 5) Keep Bass Boost to 0db and keep Phase shift on 0 My bass control knob will be set on full while i do the above seeing as i would like to turn the bass down if needed but i must never be able to turn it louder than the max set value to avoid clipping. The one thing i don't know would be the frequency range of the speaker wire they tapped into for the LOC, i believe they must have tapped into the from door woofers so it would be a low end frequency right? would this change anything on how i set my LOC? Any advice would be greatly appreciated [/QUOTE]
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