I have a Airline 77 purchased about 5 years ago. Recently in all club venues the sound man is experiencing a lot of hiss and I seem to get alot of interference periodically. Wrote to Samson and the

As the old organ tech saying goes, you can attach a Leslie to anything! I couldn't find an online manual for the Prestige, but I would suggest finding the nearest experienced tech in your area to do the job. If there are non you are available, follow the link below to the Musical Instrument Technician's Association page for a directory.

http://www.guitar-repair.com/

Hi,

Welcome to Fixya. It seems that there is a static on the device when it receives power. You can try to use a different power cable and see if that is the cause of the issue or the problem is caused bya bad system board of the device. This can be a hardware issue but we need to verify it first by doing the steps below.

Thanks for using Fixya

The speakers would receive about 250 watts max each from the PMP3000 since they are 8 ohms.
That is quite a bit and should fill a 1000 square foot venue with plenty of sound. The type of program material will affect what sound level you can get to. I would recommend you procure a sound meter and measure the sound level. You should be able to get 90 to 95 DB out of these easily. I use a PMP 3000 with two Peavey 15 inch with horn cabinets and can get 98 DB in a 30 by 40 foot room easily. You need to respect the OSHA sound level limits and a sound meter will help you comply. The 12 inch speakers would probably be too small if you are running a lot of bass through them. Please read my tip on Fixya regarding a hazard of the PMP mixers. Essentially, when using 1/4 inch adapters or plugs from the speakon connections of the PMP's, channel A sleeve or barrel is the hot whereas the tip of channel B is the hot. This is not documented in the user manual and if you inadvertenly ground the sleeve of channel A you will likely blow the amp.

If the bridge pickup has no continuity, replace the pickup.
I the pickup has continuity replace the switch.

It sounds like somehow the pre-gain is very high while the volume or post-gain is very low. Try turning the volume high on the effects unit and the gain low, and don't have the amp volume too low either.

All interconnected equipment MUST be powered from the same receptacle or source. The XLR to the speakers should NOT have ground lift. The power for the mixer should come from where the speakers are and be routed alongside the XLR cables. All the other connected items should also be powered by the same source. The ground bounce within a building cannot only cause noise, but can rupture the input circuits of equipment. As an electrical engineer I don't know why manuals supplied with the equipment doesn't go into this more. The professionals at the big venues all know this as they have had to pay to get equipment repaired.

Now to get down to "hiss" once you get the other stuff straightened out, there are two things to know at the start: The first is that due to the statistical nature in electronics "noise and hiss" are among the laws of physics that we can't completely get around. The level of the hiss should NOT be objectionable however. The second thing is that proper level setup is important to minimize the effects of noise and hiss. You should be sending the levels to the powered speakers at near full line level into the line inouts, never mic inputs that some have. Using excess gain at the speakers will amplify any noise pickup on your audio lines. Next, at the mixer, try to keep all the level controls around 10 to 2 0'clock for rotaries and 70% for faders. Excess gain at certain stages will cause hiss to be objectionable.

Make sure the transmitte and receiver are on same channel. Often people get systems that are mis-matched and cannot work together. Also, use ONLY alkaline batteries in the transmitter... rechargeables quickly fail. The hiss is typical of electronics when no signal is present.

What is the source of the input signals? These need to be balanced lines and the sources need to be balanced. If you happen to be using condenser mics, you probably haven't turned on the Phantom Power in the mixer. If you are recording from a sound card in the PC, those have a lot of noise and are unbalanced and you have to use DI's with ground lift ahead of this mixer.

First turn the unit off then rotate the input level volume control. If it feels loose pull up lightly on it as you do this. Also rotate all your controls that you don't normally use a lot. Chances are the pots are dirty. If that doesn't help you might want to check all the connectors inside the unit if you feel confident enough to go poking around. Other wise I suggest that you find a shop that will fix the problem. If you do go poking around make sure the units unplugged and that you have grounded yourself against static discharges.