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I'm using a TA501 I bought used.
Great head, nice warm fat sound but still open and precise. Quite similar to the LMIII, which is a perfect balance between classic and modern sound for me. Also more than loud enough for any situation I gig in.
I got positive comments on it's sound through it's DI from soundman, and I like that I can adjust the level of the DI in case they ask.
The semiparametric mids are a plus over the little mark series. The lower mid frequency can go to 100hz, and I've used this control several times to get rid of excessive boom.
The build-in tube compressor is great, but I don't use it since I already have a compressor on my pedalboard, which I prefer since this goes to the PA while my amp is basically only my stage monitor. Well, at least it looks cool...
New it was a lot more expensive than the LM, but since I bought it used for a good price in excellent condition I have no regrets.
The LMIII is better value, so if I would have to buy new I would choose that one, but I would miss the semiparametric mids.
If you can find a used TA501, I would certainly recommend it!
So what's the difference between the SA heads and the TA heads, or the LMRocker or the R500 ?
I had that head for awhile and liked the compressor, but, ultimately fell in love with the F1.
I never had a chance to play the F1 or F500. How would you describe the difference in sound with the TA501?
The small size would certainly interest me, but I think I would go for the F500 because of the semiparametric mids.
I still would love to try the LM800 ( not tube ), to see if it really is a louder version of the LMIII.
Always wondered about the LM800. So you feel it's just a louder version of the LMIII ?
It is similar, I would say deeper low end and a little more high mid, very nice amp. Sounds great through the Hd series cabs.
I would say the F1 had a more solid, chunky kind of tone, right out of the box, while the TA501 had a broader, kind of open low end, IIRC. Were the SD heads supposed to be a compromise between the SA and TA?
I still would love to try the LM800 ( not tube ), to see if it really is a louder version of the LMIII.
The LM800 has a class D power section rather than the class A/B of the LMII/III. I've heard that it sounds different (less warm, more like the F1/500) to the LMII/III because of this.
No direct experience, just what i've read![]()
To my ears it has more of the warmth of the lmii through the mids rather than the somewhat brighter and more modern sounding F1.
I am sure Ken had a great little video a while back comparing the lmii and f1. With some eq they can be made to sound similar, I think for my tone goals I preferred the warmer lmii slightly over the more clinical f1.
I owned an lmii for some time, demo'd the F1 several times and now have the lm800 as a keeper.... Until gas returns again!

I'll soon be trying an LM800, and will use it primarilly for my Blues band gig. Looking forward to hearing if it really is a louder LMIII, or closer to an F1. Everyone has a different opinion !![]()
Interesting thread, some of these heads have not been talked about in a while. I liked the LMIII for sure but it would run out of steam/compress too soon for me, perhaps the low end bump. A great sounding little amp though. I later picked up a very nice F1 that I have gotten good results with. The compression is tighter if that makes any sense or less bottom squish something like that. I have wanted to try one of the LM800's but they have been fewer and far between. My trusty Shuttle 9.0 through one Berg HT112ER cab is the bomb though.
The compression thing is the whole reason that I sold my lmii, it was especially bad at 8 ohm. I ran a shuttle 9.0 for a long time which was a great amp, but when I a/b'd it with the Lm800 I thought the Lm800 sounded deeper, fatter and a little cleaner. I would also say the Lm800 is a bit louder than the shuttle but that might be a due to different volume pot tapers.
Both are great amps for sure and sound amazing through Bergs.
Still no mute on the Lm800 which is just silly, so am using a polytune as a mute switch.
Well I'm fixing to try out an LM800 as I just swapped John my F1 for his LM800 thanks John!!!!. I have been wanting to try one of these but like I said you never see them. Everyone ran out and purchased the "tube" version instead.
I doubt I could ever be persuaded to part with my Shuttle 9.0 (which I also got from John oddly enough) it does such a good job into a small 8 ohm cab.
I am excited about trying the LM800 with one of my 1x12 8 ohm Bergs.
