SD 1200.4 Gain Issues
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Joined: Jul 2018
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From: Toronto
SD 1200.4 Gain Issues
Hey folks,
First here’s what I have:
2018 SGS
Head Unit GT (flashed for 4 speakers, no amp)
GZ Yellow basket 6.5 Coaxial (2 in the fairing and 2 in lowers.
SD 1200.4 4 ohm
RF DSR1 (file from Garage Bagger)
All properly wired from battery, etc
I’ve followed the amp gain adjustments. Head unit 3 steps down from full, 1k pink noise, speakers disconnected at amp. I used a DMM on each channel.
The issue is I can’t get the gain V any higher than 24. I’d like to bring it to almost 29.
Has anyone heard of this or have any suggestions?
Thanks.
First here’s what I have:
2018 SGS
Head Unit GT (flashed for 4 speakers, no amp)
GZ Yellow basket 6.5 Coaxial (2 in the fairing and 2 in lowers.
SD 1200.4 4 ohm
RF DSR1 (file from Garage Bagger)
All properly wired from battery, etc
I’ve followed the amp gain adjustments. Head unit 3 steps down from full, 1k pink noise, speakers disconnected at amp. I used a DMM on each channel.
The issue is I can’t get the gain V any higher than 24. I’d like to bring it to almost 29.
Has anyone heard of this or have any suggestions?
Thanks.
Road Captain
Joined: Feb 2016
Posts: 721
Likes: 204
From: Jerseyville, IL
Another thing to note is that when doing gains when using a DSP of any kind, the tune should be set to flat across the board for the speakers. It is possible if using a 1K tone, that if the 1K area in the DSP tune is cut or reduced, that the signal from your DSP to your amp is not on full tilt.
Load in a tune that is flat, check master volume on DSP is full, check channel volume is full for the channels you have loaded as your outputs to amp, set gains, then load tune from GBS
Load in a tune that is flat, check master volume on DSP is full, check channel volume is full for the channels you have loaded as your outputs to amp, set gains, then load tune from GBS
Seasoned HDF Member
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
Another thing to note is that when doing gains when using a DSP of any kind, the tune should be set to flat across the board for the speakers. It is possible if using a 1K tone, that if the 1K area in the DSP tune is cut or reduced, that the signal from your DSP to your amp is not on full tilt.
Load in a tune that is flat, check master volume on DSP is full, check channel volume is full for the channels you have loaded as your outputs to amp, set gains, then load tune from GBS
Load in a tune that is flat, check master volume on DSP is full, check channel volume is full for the channels you have loaded as your outputs to amp, set gains, then load tune from GBS
I think I might have been setting my gains with a tune already loaded, thought my system still sounds pretty good, I wondered if I was leaving something on the table.
Last edited by teedoff65; Mar 24, 2021 at 10:28 AM.
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
Originally Posted by teedoff65
Thanks for this. I think a lightbulb just went off! lol
I think I might have been setting my gains with a tune already loaded, thought my system still sounds pretty good, I wondered if I was leaving something on the table.
I think I might have been setting my gains with a tune already loaded, thought my system still sounds pretty good, I wondered if I was leaving something on the table.
Seasoned HDF Member
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
I was planning on taking the fairing off this weekend or sometime in the next few days and trying to tweak the tune a bit anyway, since ive got a bit of time on the speakers and a "break in" period.
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Joined: Jul 2018
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From: Toronto
Another thing to note is that when doing gains when using a DSP of any kind, the tune should be set to flat across the board for the speakers. It is possible if using a 1K tone, that if the 1K area in the DSP tune is cut or reduced, that the signal from your DSP to your amp is not on full tilt.
Load in a tune that is flat, check master volume on DSP is full, check channel volume is full for the channels you have loaded as your outputs to amp, set gains, then load tune from GBS
Load in a tune that is flat, check master volume on DSP is full, check channel volume is full for the channels you have loaded as your outputs to amp, set gains, then load tune from GBS
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Thread Starter
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Joined: Jul 2018
Posts: 67
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From: Toronto
An update to the gain dilemma...
I reset the EQ on my DSR1 to a flat signal (I left the crossovers set and didn't reset those).
I ran -5db 1000 test tone with the speaker wires disconnect (3 steps down from full on the GT head unit).
On the SD 1200.4 I set the first channel to 28.6 V with ease. I went to the next channel and the volts were at 32.7 on the lowest gain. Regardless of turning up the dial the volts barely moved and I could not set the channel.
I then returned to the first one and checked it again (to where It was properly set) and the volts were 6.3. I tried doing it all again and could not set the volts at all to their properly tolerances. I don't understand what is going on.
I finally set them to 'ear' only.
Any suggestions would be helpful.
I reset the EQ on my DSR1 to a flat signal (I left the crossovers set and didn't reset those).
I ran -5db 1000 test tone with the speaker wires disconnect (3 steps down from full on the GT head unit).
On the SD 1200.4 I set the first channel to 28.6 V with ease. I went to the next channel and the volts were at 32.7 on the lowest gain. Regardless of turning up the dial the volts barely moved and I could not set the channel.
I then returned to the first one and checked it again (to where It was properly set) and the volts were 6.3. I tried doing it all again and could not set the volts at all to their properly tolerances. I don't understand what is going on.
I finally set them to 'ear' only.
Any suggestions would be helpful.
Seasoned HDF Member
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
An update to the gain dilemma...
I reset the EQ on my DSR1 to a flat signal (I left the crossovers set and didn't reset those).
I ran -5db 1000 test tone with the speaker wires disconnect (3 steps down from full on the GT head unit).
On the SD 1200.4 I set the first channel to 28.6 V with ease. I went to the next channel and the volts were at 32.7 on the lowest gain. Regardless of turning up the dial the volts barely moved and I could not set the channel.
I then returned to the first one and checked it again (to where It was properly set) and the volts were 6.3. I tried doing it all again and could not set the volts at all to their properly tolerances. I don't understand what is going on.
I finally set them to 'ear' only.
Any suggestions would be helpful.
I reset the EQ on my DSR1 to a flat signal (I left the crossovers set and didn't reset those).
I ran -5db 1000 test tone with the speaker wires disconnect (3 steps down from full on the GT head unit).
On the SD 1200.4 I set the first channel to 28.6 V with ease. I went to the next channel and the volts were at 32.7 on the lowest gain. Regardless of turning up the dial the volts barely moved and I could not set the channel.
I then returned to the first one and checked it again (to where It was properly set) and the volts were 6.3. I tried doing it all again and could not set the volts at all to their properly tolerances. I don't understand what is going on.
I finally set them to 'ear' only.
Any suggestions would be helpful.