glasman wrote:Naw, the idea is a good one but the d-pre is not a great bit of engineering. I really like what adding 10 to 15dB of gain on the front end does for single pickups. The second sucky side of it is a phase inversion, but that is fixable as well.
What is the disadvantage of the phase inversion? Seems like it wouldn't matter unless there is some parallel device in use, or the amp were configured to use both inputs.
MPM
There are a lot of guitarists that are "into" the concept of absolute phase. In other words, if the signal is going positive on the input to the amp it should be going positive at the speaker and that the speaker cone should be pushing out. I have to admit, you can hear a little bit it difference (using a reverse cable to the speaker).
Gary
Located in the St Croix River Valley- Afton, MN
About 5 miles south of I-94
aka K0GWA, K0 Glas Werks Amplification www.glaswerks.com
glasman wrote:Naw, the idea is a good one but the d-pre is not a great bit of engineering. I really like what adding 10 to 15dB of gain on the front end does for single pickups. The second sucky side of it is a phase inversion, but that is fixable as well.
I agree, a little bit of boost in front is a good thing...especially with single coils . The phase inversion is a benefit, as you don't need to reverse any speaker wires to be back in phase, especially if you have an inverting loop.
The first time I had a guitar amp come in with FET's was a Webb 6-14E. It had a PF5103 on the input and the 2N5949 on the reverb in and stage after the tone stack. Was in the 70's when I opened the shop here in Central Texas, remember the FET was a new kind of transistor and this one was for RF, it had the detail found only in a tube back then. The ones now have low noise and capacitance, are easy to find...
. The phase inversion is a benefit, as you don't need to reverse any speaker wires to be back in phase, especially if you have an inverting loop.
