In our church - like many churches, I suspect - we've had lots of changes in the music area over the nearly twenty-eight years we've been there. Originally there was just an organ, with occasional use made of a piano as well. Gradually the organ was superseded by piano, drums, guitar and various other instruments as the musicians came and went. The organist decided it was time to give up and went elsewhere - sadly - but it was increasingly obvious that not only was the time delay between the acoustic instruments and the organ a problem, but also the pitch aspect: it's hard to tune to an organ at the best of times, and quite honestly the other musicians weren't dead keen to do so. And it depended on whether the piano stayed in tune with the organ anyway.
I played piano in the church for probably around twenty years (after having played it in our previous church for something like thirteen years). Eventually I was eased out in favour of keyboards. I wasn't impressed at the time, as the organist hadn't been in her day, but c'est la vie. So it goes. I think I'm reconciled now!
With the increasing use of instruments that required amplifiers, we saw a whole range of amplifiers come and go over the years, until it seemed that the amplifiers swamped everything else in the church. (Some days they literally swamped everything, if things weren't going according to Hoyle.)
In our new building, the amplification is more under control than it used to be in the old church, or in the two buildings we used over a nineteen-year period until we built ourselves a new place. The amplifiers in the picture, which seem large enough, are nothing compared to the couple of huge ones we had in our last place. I was glad to see the back of them, as were the guys who used to have to put them in place each Sunday morning.
As you can see, these are from the Fender family - they're officially called the Fender Bandmaster. They're probably fairly hefty to shift around, which is what solid roadies are for, but presumably they also give out a hefty sound.
Ah, the good old days of acoustic instruments, when they only thing you had to worry about was tuning....