Avt 275

Discussion in 'Marshall Amps' started by Mark, Nov 12, 2007.

  1. Mark

    Mark New Member

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    Just purchased the AVT275. A very impressive unit but I have one small but important question: If anything was damaged (for example in transit) is there any way I could find out without opening the unit. The single tube/valve, would it be obvious if this was cracked or broken in terms of sound. Im sorry if this sounds like a naive question but I'm new to amps. Thanks for your help.
    Mark
     
  2. LoKi

    LoKi New Member

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    Well, you've only got 1 tube, so if its got issues, you'll know. Its in your preamp stage, so if you have the gain up, you'll get nasty squeeling or humming even if there no instrument plugged in. If its broken completely, I don't think much will happen when you plug in at all except hum.

    The preamp tube is simple to replace, and is a super cheap fix. Enjoy the AVT! They are quite nice.
     
  3. Mark

    Mark New Member

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    Thanks for that Loki. It's probably ok then on that front. I was just concerned because the delivery guys had the (boxed) amp on its side when the opened the delivery van. Sometimes you just can't tell if things have been rough-handled prior to delivery. It seems to be working without a hitch. I noticed though that when the amp heats up (after a few minutes) humming kicks in - sounds like the cooling fan. It's actually quite loud when playing in a quiet environment; is this normal with the AVTs?
     
  4. coldsteal2

    coldsteal2 New Member

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    They are pretty tough
     
  5. Mark

    Mark New Member

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    Yes, but is the humming usual in the AVTs? It's very noticable in a quiet environment. If so, is there any way to reduce it?
     
  6. LoKi

    LoKi New Member

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    They do have a cooling fan inside... like a PC fan. You can probably replace it with a noiseless fan.

    Like all fans in PC's the bearings get shot, or if it gets nudged they start to howl. If you open it up and tap on the center of the fan while its spinning you might be able to eliminate the noise... not a permanent fix, but at least it will tell you if thats the problem. Tapping the center sometimes aligns the bearings and lets the fan spin properly.. if its silent then, you need a new fan.
     
  7. LoKi

    LoKi New Member

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  8. Mark

    Mark New Member

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    Loki, thanks for that. What sites did you check regarding the problem? Maybe it's a problem exclusive to AVTs? I definitely need to sort it before it does my head in! Either do that or keep playing till I drop! :)
     
  9. LoKi

    LoKi New Member

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    I'd say keep playing! But if the fan has a problem, you should get it sorted out soon... if the pc board gets too hot in there it could fry. Is it still under warranty? I know its a pain, but at least it would get fixed for you.

    I just googled "Marshall AVT fan noise".
     
  10. Mark

    Mark New Member

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    Yes, I just got it a week ago. It's covered for 1 year. I'll do a few ground-wire checks and a bit more research and see if the problem lies elsewhere. Otherwise it's going back.
     
  11. Mark

    Mark New Member

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    Just one other question; actually, it's more of an opinion: Does anyone have experience of using both the AVT50 and AVT275 and how do they compare against each other? One link I came across on the web suggested the AVT50 was superior (ie. closer to the "authentic" marshall tone). Maybe that's because not many people practising at home have the opportunity to crank up the 275 to get the best juice out of it - apparently it only really shines at high volume.
     
  12. LoKi

    LoKi New Member

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    I had the 150H and its true, the louder you can go, the better.

    I think the 275 has a few more features than the 50... like the acoustic simulator *which sounds great* and a few other things that may be worth considering.

    275watts is a LOT of power... hell 50 watts is a lot of power. There is a 5 watt Class A BadCat Mini Cat 2 at my friends shop and its SCREAMING loud... and its only 5 watts...

    Its all relative I guess. Do you play with a band ever, or jam with anybody? You might want that extra power if you're playing over drums...
     
  13. Mark

    Mark New Member

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    I'm not gigging at the moment; just some church/folk-group stuff once a month (and that's with keyboards). I'm working towards doing backing work on guitar but I think the 50x would be more than adequate for small gigs. As a mattter of fact, the 275x really got a slating on harmony-central.com; It got completely blasted out of the water! The 50x came off lightly in comparison though there was only one review on that; apparently, it closer to the authentic marshall tone. Well, I'll talk to the guy in the music shop and see if he'll trade down or (if not) maybe push the boat out a little further and buy a small all-valve amp. [Just hope the taxi driver doesn't remember his cabs rear suspension-springs were screwed getting this tank back to the music shop!! Better flag him down when I'm on the main road] :)
     
  14. LoKi

    LoKi New Member

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    They are heavy aren't they? The thing I hate most about combos is the weight. I just picked up another Mark IV and its soo damn heavy.

    There is a Peavey Triple XXX 2x12 combo that weighs 180lbs easy... Scary!
     
  15. Mark

    Mark New Member

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    Well thank God I got to return the AVT275x in exchange for the AVT50x. The 50 is just perfect for my needs and it's portable; anyone who says it's heavy hasn't tried to lift the 275! As regards in-built (digital) effects I'd rather build up a stomp-box collection over the years; that way when/if I sell to upgrade I still have my favourite pedals; makes perfect sense. Yes, I strongly recommend the 50; it's got a lovely tone despite the fact that distortion and reverb aren't that hot; but like I said that can be cured with a few top-notch footpedals and I just wanted to pay for a quality amp with great tone at a decent price. I'd recommend the 50 as a MIDWAY amp between gigging in medium sized venues/studio practice - (this amp can be seriously loud) - and major events (such as open-air gigs). If you're at the latter stage of your musical profession then it makes sense to consider something like the TSL100 or something along those lines. And the other thing I noticed about the AVT50x is there's no sound from the fan; don't know if that's the same on every single model but I was really pleasantly surprised after hearing the fan on the 275. In conclusion, a great "little" amp for the money!
     
  16. coldsteal2

    coldsteal2 New Member

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    I love my AVT50, i put in a Celestion Heritiage G12M 70 the difference
    in power was automatic. They are pretty darn loud and will
    drive a 4 12 cab with no problem
     
  17. i8ipop

    i8ipop New Member

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  18. i8ipop

    i8ipop New Member

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    it's 150watts across 2x75watt speakers, that's where the 275 comes from...still alot tho'!!!
     
  19. crossroadsnyc

    crossroadsnyc Senior Moderator Staff Member

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    Last edited: Sep 22, 2012
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  20. judgey1197

    judgey1197 New Member

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    Avt275

    I just ordered an AVT275, should be in tomorrow. Does anyone have any tips for the amp? OR things that i should be aware of?
    :headbanger:
     

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