Hi all,
I not sure if I'm having a problem with this amplifier but I thought I would ask just in case anyone knows anything about this amp and issue.
I have to turn the gain up a very long way before getting any decent output from it.
I have a 4V head unit and have confirmed that it produces undistorted output at 4 Volts all the way up to it's highest volume position.
With the volume on 55 out of a possible 62 I have to turn the gain on the JBL up a hair more than 3/4 of it's total movement before the amp clips it's unloaded output, the range being a nominal 100mV to 6V.
It is connected to a sealed JL Audio 13w7 that can take all the power the amp can throw at it.
The issue is that with having to turn the volume up so high before reaching maximum power at 0dB, there is no headroom to tune the gain for a -10dB overlap and other amps in the car are incapable of accepting such a high level from the head unit without the gain adjustment bottoming out.
I notice the JBL can have a bass knob connected, mine was second hand and didn't come with one, would connecting the bass knob help by allowing what would effectively be more gain than the amplifier gain knob would allow on it's own?
I attache a section of the schematic for your convenience, at this stage reading it is beyond me I'm afraid.
I not sure if I'm having a problem with this amplifier but I thought I would ask just in case anyone knows anything about this amp and issue.
I have to turn the gain up a very long way before getting any decent output from it.
I have a 4V head unit and have confirmed that it produces undistorted output at 4 Volts all the way up to it's highest volume position.
With the volume on 55 out of a possible 62 I have to turn the gain on the JBL up a hair more than 3/4 of it's total movement before the amp clips it's unloaded output, the range being a nominal 100mV to 6V.
It is connected to a sealed JL Audio 13w7 that can take all the power the amp can throw at it.
The issue is that with having to turn the volume up so high before reaching maximum power at 0dB, there is no headroom to tune the gain for a -10dB overlap and other amps in the car are incapable of accepting such a high level from the head unit without the gain adjustment bottoming out.
I notice the JBL can have a bass knob connected, mine was second hand and didn't come with one, would connecting the bass knob help by allowing what would effectively be more gain than the amplifier gain knob would allow on it's own?
I attache a section of the schematic for your convenience, at this stage reading it is beyond me I'm afraid.