You can adjust the gains table easily with p2k commander or p2k tools.
Both are available at www.planetmotox.net and at www.motomodders.net.
From:Comcast Email
summers.d@comcast.net
> Is there a way to increase the volume on a V551 handset above that
> level originally programmed? Do third party firms or Motorola
> perform this service? Does anyone have a source or web site?
>
> Thanks.