GA-79 RV volume boost?
Posted 17 June 2011 - 10:15 AM
My Blues Jr. at 15 watts seems to have twice the loudness of the GA-79's 30 watts. However the GA-79's sound is more open and much less boxy than the Blues Jr. All it seems to need is a little boost.
Any recommendations would be greatly appreciated.
Posted 11 August 2011 - 10:41 AM
I use it primarily for rhythm guitar in a jazz big band setting. The guitar I use for this is a (Westerly) Guild X170 made in 1988.
Posted 13 August 2011 - 03:48 AM
IMX perceived volume can vary widely, particularly with EQ adjustment
And 'traditional' vs 'modern' amp designs
There is a spectrum of rhythm guitar sounds from the unamplified Freddie Green style to the syncopated 'comping' fingerstyle
Each requiring different approaches regarding being heard...
Lower and Warmer....
I like kayaking....it really floats my boat
I dig most stuff.......Anon(gardener)
Posted 13 August 2011 - 04:39 AM
I am not sure this is all of it for you though. That amp runs off 4 el-84's right? If I remember correctly, that amp is a stereo? I think it should be two 15 watt amps (2 el-84's) into one speaker each, wHich I imagine even with the stock speakers should be at least the same in volume as the BJ.
I would check to make sure you are using the right settings (I think there may be a way to run it mono at 30 watts) and then see what you are using for speakers.
EDIT: SUPPOSING i AM RIGHT ABOUT THE AMP)
Posted 15 August 2011 - 09:09 AM
I currently plug my guitar into the center (accordion) input and set the output setting to "mono". From your comments I get the feeling I owe it to myself to get all the tubes checked for any quality issues.
The amp is wonderfully quiet even under harsh (heavy fluorescence) conditions.
Posted 15 August 2011 - 02:21 PM
If a tech suggest having the tubes replaced, KEEP THE OLD TUBES! The tubes are worth something, at the least having a record of what the amp likely came with. At best, they are still fully working and sound better than what you can buy new (try looking up what a tested, NOS RCA tube will cost you). The tubes could be worth a lot of money, AND the amp is worth more if you have the original tubes.
When a tech chooses to recommend new tubes, the reasons may vary from putting fresh tubes to remain on the safe side (to keep the amp in good shape), or he could not have the equipment to fully test your tubes, or he could think they are questionable. In many cases, he may not know or care what exactly the value of the tubes are, or he may recommend a service SO HE CAN GET HIS HANDS ON YOUR TUBES.
If you are still reading, a little more about tubes: in most of the el-84 amps I have experienced, they tend to go through power tubes faster than other types. But, nearly all vintage amps will go through power tubes faster than preamp tubes. Preamp tubes about half the time seem to last a lifetime, the other half they seem to be wore out. I might tend to pull the power tubes and run cheaper ones, just to preserve the tubes.
If you are still reading, you might check what the speakers are to see if they are original and consider pulling them for the same reason. IF they are original, (and especially if they are Jensen) they will be VERY valuable, and add greatly to the value of the amp. They will also be very old, and just by age alone, will likely blow within the year if you play it often. Vintage jensens sound significantly better than "reissue" speakers, but they even in times they were new, had a tendency to not be able to last long in the amps they put them in at full volume. If they have survived this long, the glues used are ready to give ANY MOMENT at worst, and not able to take what they could when new at best.
Posted 15 August 2011 - 04:08 PM
I had tried the same model a few years ago at the Chicago Music Exchange and was taken with the quirky design of the cabinet and electronics. However their price of $2,200. dampened my enthusiasm at the time. When I saw it again I couldn't pass it up.
Your advice is well taken but I don't have a clue as to where to take it for a thorough check up in the Chicago area. I know many guitar technicians but not many amp techs.