I recently bought a Monoprice Stage right 40 watt, 10" speaker, solid state amp. I wanted something that had a 3 band EQ, spring reverb, no built in effects, and line out. I wanted solid state for lighter weight, etc, and I wanted something with decent clean headroom. This was very inexpensive - less than $100 - delivered during the black Friday sales period.
I am very pleased with the amp except that the line out signal is very distorted compared to the sound coming from the amp speaker itself. We had practice tonight and our sound guy was not happy with the line out signal going into the mixer because of the distortion. Any ideas about what might be going on and if/how to correct? The line out signal has reverb, so am I correct in thinking that the line out is not taken from the preamp before the power section?
I wanted a line out connection because our sound guy would prefer that we not mic our amps and have sound bleeding into the mics from the other instruments.
Have you got a link to some info about the amp? What amp has this replaced, ie whose line out worked as required?
3 possibilities as I see it - 1/ the amp is faulty 2/ the line out signal level is too large for the mixer’s input, resulting in it being overdriven. 3/ the line out signal from the amp is a simple uncompensated type, with no filtering to get it to sound the same (when heard through a full range, flat freq response system) as it does via a guitar speaker (which have a very particular freq response, with a steep roll off of high frequencies after a peak at about 2-3kHz). ie the the additional distortion heard via the PA is due to it accurately reproducing the high frequencies that the guitar speaker is rolling off.
Looking at that link and the amp’s info, there’s no mention that its line out is frequency compensated. So it’s rather unlikely to be so, especially at that price. So any overdrive that sounds nice through the guitar amp’s speaker will sound buzzier than bee hive via the PA. I can envisage that causing people to think something was wrong, if they weren’t previously aware of the effect. I know many amps have a suitably compensated line out, definitely some Marshall models, but they’ll cost a lot more $. Because the high end roll off is so steep, it’s not something that can be replicated by regular or even a graphic eq. Peavey used to sell ‘direct boxes’ that take a feed from the guitar amp’s speaker output and turn it into a frequency compensated line signal, so have a market search, I guess that Behringer etc may make something along those lines these days that’s $ friendly.
It's unlikely that there would be significant bleed into a close miced amp unless the adjacent sources are ridiculously loud. I do live multitrack recordings several times a year and have never had an issue with isolation. Drum overheads can be problematic.