Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Madison on January 22, 2013, 09:32:07 pm

Title: 5E3 blowing a speaker?
Post by: Madison on January 22, 2013, 09:32:07 pm

Every have a 5E3 blow a speaker up?

I am almost sure the "5E3 from hell" I have, just did.
It's a terrible cracking sound at high volumes.

Tried everything.
Thought it was the baffle, cabinet, vibrations, etc. and then finally just took the speaker out and put it on the floor....still crackles.

Nothing on the voltages side look out of the ordinary.Like 360 to 400VDC on the plates.(depending on rectifier tube.
PT is 150mA/320-0-320.
OT is 8k/8 ohm for a 5E3.
Speaker is......was a BBQ Sig 12 @ 25 watts.

A Vintage 30 has no problems.

Should I get a 50 watt speaker or something?
What speakers do you guys use in a 5E3 build?

Title: Re: 5E3 blowing a speaker?
Post by: sluckey on January 22, 2013, 09:38:18 pm

I have a Jensen P12N reissue in mine.

Title: Re: 5E3 blowing a speaker?
Post by: smackoj on January 23, 2013, 01:43:00 am

I don't know what a BBQ is? But it wouldn't be unheard of for a speaker to have a weak spot in it from manufacture and go puuf when the right note or notes hit it just right (wrong). You shouldn't be worried about putting another 25 watt speaker in the amp IMO.

 :icon_biggrin:

Title: Re: 5E3 blowing a speaker?
Post by: Ed_Chambley on January 23, 2013, 07:59:05 am

I have a 30 watt weber ceramic.

Title: Re: 5E3 blowing a speaker?
Post by: phsyconoodler on January 23, 2013, 10:34:54 am

BBQ? WTF is that? Maybe it likes to sizzle with a name like that. :l2:

 I use Jensen P12Q's or R's or N's or the ceramic versions.

Title: Re: 5E3 blowing a speaker?
Post by: sluckey on January 23, 2013, 11:08:08 am

BBQ = Weber

Title: Re: 5E3 blowing a speaker?
Post by: punkykatt on January 23, 2013, 11:39:01 am

I have read that if you play with the amp cranked and use a lot of distortion you should use a speaker that is double the wattage of the amp.
Punky

Title: Re: 5E3 blowing a speaker?
Post by: phsyconoodler on January 23, 2013, 12:02:28 pm

Weber? Too bad.Great speakers except for the cheap ones from China.Signature series.



 

Title: Re: 5E3 blowing a speaker?
Post by: Madison on January 23, 2013, 04:27:17 pm

Quote from: phsyconoodler on January 23, 2013, 12:02:28 pm

Weber? Too bad.Great speakers except for the cheap ones from China.Signature series.



 

Wow!
I didn't know that.
That's what blew up.
Must have gotten a dud.

Likely won't be using them anymore.
Maybe I'll go with Jensen.

Title: Re: 5E3 blowing a speaker?
Post by: Willabe on January 23, 2013, 05:00:58 pm

I don't think he's saying all of Webers speakers are from China?


              Brad      :think1:

Title: Re: 5E3 blowing a speaker?
Post by: phsyconoodler on January 23, 2013, 06:01:15 pm

No,just the signature series are from China.Use your noggin and figure out how they can sell a 12" speaker for 45.00 and make any money at all.
  Weber's baskets and magnets all likely come from China and the vintage series get American cones and voice coils put in them.The Vintage series and everything else is awesome,just the signature series is not always great.But I have used some in the past and they worked just fine,so it's not a slight against Weber in any way.Just clarifying a couple of things.

Title: Re: 5E3 blowing a speaker?
Post by: archaos on January 25, 2013, 11:19:24 am

I have a Jensen 12", 100 watts Blackbird in mine.