Rig-Talk

Guitars, Gear, Tone!
It is currently Thu, Nov 15, 2018 2:01am

All times are UTC - 5 hours




Post new topic Reply to topic  [ 8 posts ] 
Author Message
PostPosted: Sat, Sep 15, 2018 5:58pm 
Offline
Plank Cranker Trainee

Joined: Sun, Jul 02, 2006 5:52pm
Posts: 777
Location: USA
Are you human?: 951
I have an '82 Marshall 2204. It sounds great at 16 ohms thru a 4x12. But when I switch it to 8 ohms to run a 2x12, the bass farts out and it just sounds shitty. Flubby and buzzy like it's trying to breath, but can't. Is this a transformer problem (original Drakes)? It's an old all original amp that I bought in '15. I had it professionally recapped and converted to EL34's. It has fresh tubes as well. It sounds exactly like it should at 16 ohms and I'm real happy with it and gig it regularly. What might cause this?


Top
 Profile  
Reply with quote  
PostPosted: Sat, Sep 15, 2018 7:07pm 
Offline
Rock God
User avatar

Joined: Mon, Jul 06, 2009 10:07am
Posts: 7904
I'm no tech. Are you are it's not your cab and speakers? Try your 8 ohm tap in your 16 ohm 4x12 and see if it still does it. It's ok to run your 8 ohms out into a 16 ohm cab. Running 16 ohm out from your amp to an 8 ohm cab is not ok.I am not positive but I think if you had a bad secondary it would affect all your taps.

_________________
Good deals with Steve K, Ttosh, Cyndicate, Moshaholic, Sswanson,
Immersed,Moltenmetalburn,MOOSEHEADS,Drumdude,Ignoramus,Espquade,smdb,
RG955T,pfapin05,TheHoff,Braciola,Inception,Dewd,JCJ,Roodboy,RickyRockhardo,
gbsmusic,Ignoramus,RipleyRipley,WizardOzz,Spaceboy,Tonmazz,Sjk,warhead78,
fuzzyguitars,bwgintegra,Bluplirstand,londaxe,* velcro-fly *Parap14 and at least 25 more


Top
 Profile  
Reply with quote  
PostPosted: Sat, Sep 15, 2018 8:58pm 
Offline
Plank Cranker Wanker

Joined: Wed, Sep 02, 2015 12:47pm
Posts: 1822
Are you human?: 951
glip22 wrote:
I'm no tech. Are you are it's not your cab and speakers? Try your 8 ohm tap in your 16 ohm 4x12 and see if it still does it. It's ok to run your 8 ohms out into a 16 ohm cab. Running 16 ohm out from your amp to an 8 ohm cab is not ok.I am not positive but I think if you had a bad secondary it would affect all your taps.


This^

_________________
Please don’t PM me any questions about any amps since I only check messages when selling gear.


Top
 Profile  
Reply with quote  
PostPosted: Sat, Sep 15, 2018 9:42pm 
Offline
Plank Cranker Trainee
User avatar

Joined: Sat, Oct 06, 2012 5:45pm
Posts: 348
Are you human?: 951
itsme wrote:
I have an '82 Marshall 2204. It sounds great at 16 ohms thru a 4x12. But when I switch it to 8 ohms to run a 2x12, the bass farts out and it just sounds shitty. Flubby and buzzy like it's trying to breath, but can't. Is this a transformer problem (original Drakes)? It's an old all original amp that I bought in '15. I had it professionally recapped and converted to EL34's. It has fresh tubes as well. It sounds exactly like it should at 16 ohms and I'm real happy with it and gig it regularly. What might cause this?


Have you tried another amp?

If you have the same problem, the next step is to check and see if the output on your 2x12 cab is connected via a PCB board vs. direct speaker wiring.

I had to replace a PCB board on an old 4x12 Marshall cab a few years back... I forget the site but parts can be easily found by doing a Google search for "Marshall 4x12 PCB board" with various other parts.

Good luck!

_________________
Image


Top
 Profile  
Reply with quote  
PostPosted: Sat, Sep 15, 2018 9:55pm 
Offline
Plank Cranker Wanker
User avatar

Joined: Sat, May 24, 2008 2:37am
Posts: 1003
Maybe your 4-12 cab just has better speakers or just is a better sounding cab then the other one.

_________________
2001 Gibson Les Paul Standard.
83' Ibanez artist AR30 with SD custom in Bridge.
84' Marshall 4104 combo.
A few random pedals.


Top
 Profile  
Reply with quote  
PostPosted: Sat, Sep 15, 2018 9:58pm 
Offline
Hack

Joined: Fri, Jun 15, 2018 12:30am
Posts: 40
Location: Sacramento, CA
Are you human?: 951
Loudness250 wrote:
Maybe your 4-12 cab just has better speakers or just is a better sounding cab then the other one.


That's what I was thinking


Top
 Profile  
Reply with quote  
PostPosted: Sat, Sep 15, 2018 10:18pm 
Offline
Plank Cranker Trainee

Joined: Sun, Jul 02, 2006 5:52pm
Posts: 777
Location: USA
Are you human?: 951
Thanks for the responses. It's definitely not the speakers or cab. I have four cabs all with good celestions. I run both my Friedman and bogner thru it at 8 ohms and they sound great. It's definitely isolated to the Marshall. I'm wondering if something is up with the transformer where it taps off at 8 ohms? But I don't know enough about this stuff


Top
 Profile  
Reply with quote  
PostPosted: Sun, Sep 16, 2018 6:31am 
Online
Plank Cranker Trainee

Joined: Wed, Nov 18, 2015 9:39pm
Posts: 526
Location: Great White North
Are you human?: 951
I wonder if the negative feedback is connected to the ohms selector vs a dedicated tap?.
Might account for the change in tone as you change impedance, although the change you describe is more dramatic than would normally be expected.

_________________
Certified Ampaholic :D
Bogner Twin Jet
Diezel VH4
EVH 5150III 100watt
Friedman BE100
Marshall 1987xl (with V2a 80's mod board)
Peavey 5150 block letter
Peters Vega-FSM
Soldano SLO 100
Vox AC30HW
Wizard MCII

A couple Les Pauls, an SG etc...


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: Google Adsense [Bot], MISTER NOBODY™, sg guy and 8 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group - Terms of Use