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post #1 of 6 (permalink) Old 07-17-2019, 10:36 PM Thread Starter
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AMP Tuning Help

I installed my Diamond Audio Micro84U 660 Watt amp behind my DSR1 Sound Processor and stock HD GT head unit (2018 with navigation). 2 Hertz MPK 165s & tweeters; 2 Hertz SV 165s on front 2 channels. 2 Hybrid Technologies Pro Audio Shallow 6x9s and 2 Hertz ST25 tweeters on the rear 2 channels.

Now I need to tune it and I know what loud sounds like, but I honestly donít know how to tune it in to get the most out of the system without damaging any of it. I donít want to leave any power on the table after spending all this $$, but I donít want to blow speakers or the AMP and have to respond all this $$ either. I donít know that I trust my ears to dial it in, so Iím looking for tips. Should I take it to a professional to tune it, or can I use a multimeter or something to do it mathematically?

Thanks in advance for your help!


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post #2 of 6 (permalink) Old 07-20-2019, 09:30 PM
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I have a DD DSP, so Im not familiar with the one you have. DSPs are very powerful and take a lot of time to learn. Sure you can learn everything it does quickly but to get it to come together takes time.
Im not to proud to say I took mine to a pro to get the last 30% out of it, he said I was 70% there. I had it sounding real good but I knew there was more and he got it all. He had a O scope on it and knew his shit.
As for the gains, the DD has a function that you can turn up or down that increases the amps output, which was less then what it had before the DSP. I don't know if your DSP has that feature or not.
Finally, these are my thoughts only. If you have never messed with one you can get it to play pretty good. To get it 100% you have to have some experience with fine tuning.

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post #3 of 6 (permalink) Old 07-20-2019, 10:42 PM
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One tip I will give You is to make sure You have capacitors on Your Tweeters so You don't overpower them.
As far as the DSR1 I am not familiar with it as like Philly, I also have a Digital Design DSI-2 and am still learning how to properly use it.
Best of Luck and keep Us posted as to how You make out.
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post #4 of 6 (permalink) Old 07-22-2019, 01:54 PM
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There are some things you need equipment for, but don't get intimidated and think it's required. Here are some things you can do to get it to play as loud as you want while minimizing distortion:

1. Get the radio flashed and install load resistors across the outputs of all 4 channels of the stock headunit. I use 47 Ohm, 10W. Greatly reduces distortion/harshness which will save your speakers, your ears and really clean up your sound.

2. Set HPF crossover on DSR1 or amp (not both) to be same as F0 (resonance frequency) of your speaker.

3. Flatten out all the EQ settings on the radio, amp and DSR1.

4. Find the maximum output of your radio before it distorts. The DSR1 will help define that. It's a great piece.

5. Then match input sensitivity of the amp to the output of the DSR1. Best practice is to turn amp all the way down, turn radio to the maximum clean setting (from step 4, above) and keep inching up the output of the DSR1 until you hear distortion. If you don't hear distortion, back off a few dB and then turn up your amp gain until you hear distortion.

6. Use the tracks/songs you know well. Play with the gain settings on each of the components by a few dB to optimize with your music.

7. I suggest big, broad EQ changes if you want to make them by ear. However, be careful about boosting much below the F0 of the speaker -- it robs power and adds distortion. I like gentle high-frequency roll-off if the system seems too bright. In other words, use the DSR1's EQ as Bass/Midrange/Treble controls.

I hope this helps. Let us know what you came up with.
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post #5 of 6 (permalink) Old 07-24-2019, 08:17 AM
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Quote:
Originally Posted by Audioglider View Post
There are some things you need equipment for, but don't get intimidated and think it's required. Here are some things you can do to get it to play as loud as you want while minimizing distortion:



1. Get the radio flashed and install load resistors across the outputs of all 4 channels of the stock headunit. I use 47 Ohm, 10W. Greatly reduces distortion/harshness which will save your speakers, your ears and really clean up your sound.



2. Set HPF crossover on DSR1 or amp (not both) to be same as F0 (resonance frequency) of your speaker.



3. Flatten out all the EQ settings on the radio, amp and DSR1.



4. Find the maximum output of your radio before it distorts. The DSR1 will help define that. It's a great piece.



5. Then match input sensitivity of the amp to the output of the DSR1. Best practice is to turn amp all the way down, turn radio to the maximum clean setting (from step 4, above) and keep inching up the output of the DSR1 until you hear distortion. If you don't hear distortion, back off a few dB and then turn up your amp gain until you hear distortion.



6. Use the tracks/songs you know well. Play with the gain settings on each of the components by a few dB to optimize with your music.



7. I suggest big, broad EQ changes if you want to make them by ear. However, be careful about boosting much below the F0 of the speaker -- it robs power and adds distortion. I like gentle high-frequency roll-off if the system seems too bright. In other words, use the DSR1's EQ as Bass/Midrange/Treble controls.



I hope this helps. Let us know what you came up with.
Thank you, this is a nice detailed overview of how to do this.

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post #6 of 6 (permalink) Old 07-24-2019, 10:43 AM Thread Starter
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Quote:
Originally Posted by Audioglider View Post
There are some things you need equipment for, but don't get intimidated and think it's required. Here are some things you can do to get it to play as loud as you want while minimizing distortion:

1. Get the radio flashed and install load resistors across the outputs of all 4 channels of the stock headunit. I use 47 Ohm, 10W. Greatly reduces distortion/harshness which will save your speakers, your ears and really clean up your sound.

2. Set HPF crossover on DSR1 or amp (not both) to be same as F0 (resonance frequency) of your speaker.

3. Flatten out all the EQ settings on the radio, amp and DSR1.

4. Find the maximum output of your radio before it distorts. The DSR1 will help define that. It's a great piece.

5. Then match input sensitivity of the amp to the output of the DSR1. Best practice is to turn amp all the way down, turn radio to the maximum clean setting (from step 4, above) and keep inching up the output of the DSR1 until you hear distortion. If you don't hear distortion, back off a few dB and then turn up your amp gain until you hear distortion.

6. Use the tracks/songs you know well. Play with the gain settings on each of the components by a few dB to optimize with your music.

7. I suggest big, broad EQ changes if you want to make them by ear. However, be careful about boosting much below the F0 of the speaker -- it robs power and adds distortion. I like gentle high-frequency roll-off if the system seems too bright. In other words, use the DSR1's EQ as Bass/Midrange/Treble controls.

I hope this helps. Let us know what you came up with.
Thanks AudioGlider! This is very insightful.
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HD Stage IV 114 kit; Custom Paint; RCX Tormentor Headers and Torx mufflers; Biketronics 2250 amp w/ Hertz Mille Legend speakers; Factory 47 16Ē bars; Mustang solos seat; Klock Werks 6Ē flare windshield; HD floorboards
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