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I doubt that I have a copy of the manual after all this time but will take a peek in my box of old brochures and things.
I believe they are not the easiest amps to service and repair but no doubt @ICBM can better advise on that.
It really is a beaten up old boy, isn't it. I do like my gear to have had a life before me. My concern is that it's not entirely cosmetic wear. Basically the amp sounds terribly dark, I was expecting a Fender-a-like brightness but it feels muffled and very bass-heavy. Perhaps not a surprise given the 15" speaker but it's not hitting the spot for me, so to speak. Up against my Dark Terror it lacks clarity, rather noticeably. The EQ is very cool but I still can't get it to treble territory. Is this just the voicing of the amp?
It wasn't expensive but it's a bit inconvenient to cart back to the shop or to have repaired, if that were even an economical proposition. I would sell it on but I want to make sure it's working properly first, obviously.
It really sounds like your L9 has a problem. In your shoes I would take it back if that's possible and look out for a better example.
It shouldn't be a very dark amp, the EQ is quite powerful and you can get a good range of tones with them. They're not so much difficult to work on as difficult to find some of the parts, pots in particular, which can make repairing them properly a bit of a challenge. I don't think I have a schematic unfortunately.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Schematic and other docs here - http://www.rru.com/~meo/Guitar/Amps/Lab/schem.html
Thanks!
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
If you have a meter, what impedance is it? Someone has written 16 ohm on it... it might even be a bad re-cone with the wrong kit.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Is there any chance of checking out your L9 with a different speaker/cab temporarily? Would need to be preferably 8 ohm 100w rated.
BTW in response to your original request if you take a look at this Facebook page someone has posted views of the original owner's manual that are just about readable (least ways on my computer monitor)
https://m.facebook.com/story.php?story_fbid=670191919714648&id=160546784012500&anchor_composer=false
I would certainly put something like an Eminence Legend 1518 in one now, before an EV - not only a lot cheaper, but you might be able to lift the amp .
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
There was a Pro 501 in the shop recently that some nutter had fitted an enormous PA driver into - stupidly heavy, as well as sounding terrible! I replaced it with a 200W Fane Studio, which itself is not a light speaker but noticeably reduced the weight of the amp. I still have the old one - I don't actually know what make it is, but it's the heaviest 12" speaker I've ever come across - 22lb, 3lb heavier than an EV.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
I've tried it with my other cab now, an Eminence 8ohm 50W, and it sounds much better. I am tempted to keep it but I shouldn't take on a project, my track record is awful!
Replacing a speaker isn't hard, just a handful of screws and a couple of cables.
Thanks to all who commented and helped me!