Test tones for XM?????
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Stellar HDF Member
Joined: Mar 2013
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From: In a house
Test tones for XM?????
When I installed my system I tested all sources for max distortion free volume with a DD-1 just to make sure I wasn't in the smoke zone. At the time, I didn't have the SM activated so didn't mess with it. Now that I'm using XM I'd like to test it - it is louder than other sources for a given volume but definitely gets muddier earlier than other sources. Problem is I don't know of any way to find test tones on XM. Anybody know of any XM channel that would have them?? I called customer service and they had no clue what a test tone was. I keep the volume down to be safe, but would like to definitively know where the limit is just to satisfy my OCD. This is on 18 CVO RG.
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From: florida
if you dont have the SMD dd1 you could unplug the rca input from your amp and check the voltage output (of the HU with that source chosen) with your DOVM. then compare it against your other source. the voltage difference can give you an idea. if it is higher voltage output from that source, at least you would know how much and how much to compensate for it when that source is in use.
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Last edited by marcodarq; Sep 18, 2018 at 05:06 PM.
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Stellar HDF Member
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From: In a house
Stock 6.5 infotainment so no adjustability on the source output. Good idea on measuring the voltage output, at least it will give me an idea of magnitude of the difference even if no test tone.
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Stellar HDF Member
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From: In a house
Yep, it's definitely my worst sounding source. I'm assuming it's the compression or stream rate. It does sound better than my old radio with the added on XM unit, but still the SQ is ok at best compared to phone or stick.
Cruiser
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From: PA
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Grand HDF Member
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From: florida
try streaming the xm source through your phone and see if the quality gets better or changes.
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if you dont have the SMD dd1 you could unplug the rca input from your amp and check the voltage output (of the HU with that source chosen) with your DOVM. then compare it against your other source. the voltage difference can give you an idea. if it is higher voltage output from that source, at least you would know how much and how much to compensate for it when that source is in use.
m
m
Grand HDF Member
Joined: May 2014
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From: florida
I have to disagree with that, even though music is dynamic, you can stiil see and compare the higher/ highest average voltages and it will give an idea or range in which one source plays vs another. I had to go through this with my bikes, as the cd player in the old Radio sound unit that i have gives me a different level and sound quality vs bluetooth into the aux input. The differences in the voltage can give you a range. Better info is attainable if you can play the same songs through both test sources. It wont be exact, but it is closer than you think.
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Last edited by marcodarq; Sep 18, 2018 at 08:48 PM.
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