EXTREMELY TICKED OFF at my Behringer Tube Ultra-Q!

Discussion in 'Archived Threads 2001-2004' started by Brett DiMichele, Jan 6, 2003.

  1. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
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    What the hell...

    So my Behringer Tube Ultra-Q arrived this morning...

    Last night I completed the cables I needed to hook this
    thing up. The Behringer has inputs and outputs for Ballanced
    1/4" Phono, Unballanced 1/4" Phono and Ballanced XLR.

    I decided to use Unballanced 1/4" Phono Plugs. 2 Mono
    Plugs per RCA Patch Cord equals a stereo pair unless I am
    completly brain dead right?

    The center pin is the hot, the sleeve is the cold the same
    goes for the rca barrels so I know I wired it right..

    Well I wire it all up and basicaly it lights up... I have
    to crank the incomming gain to even get the VU meters to
    move a little... And when I enguage one channel of the
    parametric EQ it shuts down a speaker.. When I enguage
    both channels I get nothing...

    So I am listening to it for a while with the eq section
    completely shut off just using the tube output... And
    it sounded real "smooth" like they were working...

    That was untill I go over to my right speaker only to find
    out gee.. my Tweeter fried...

    Well isn't that freaking peachy!

    No wonder the highs were so "smooth" yeah when your down
    to one tweeter....

    I don't know if there is a fuse for the tweeter or if there
    is some sort of thermal breaker built into the XO I am going
    to let it sit for a while and then try it again..

    Worst case scenario the tweeter is fried, well the speakers
    do have a 5 year warranty so getting a new tweeter from AR
    won't be an issue..

    But why the hell ain't the Behringer working? If I am getting
    a Left and Right signal through, then why does it cut out
    the speakers when I enguage the parametric EQ and why the
    heck is the input level so low...

    The manual sure as heck don't tell me much about how to
    wire it up other than "get a professional to install this
    unit" well gee.... Can I look "professional" up in the
    yellow pages? Hey Professional.. HELP!!!

    It says something in the manual about a 6Db Cut and I guess
    that's on the unballanced side... Maybe I should have used
    the XLR's afterall....

    But why did the tweeter fry... Just coincidence?

    *rips hair out*

    [/End Rant Mode]
  2. Aaron_Smith

    Aaron_Smith Stunt Coordinator

    Jul 22, 2002
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    I'm a musician and also have a home studio. My experience with Behringer products has not been very good so far; the two I've tried have been of poor quality (both construction and sound quality), and have had some pretty serious issues. I can't speak for their whole product line or this product in particular, but I would encourage you to shop carefully when it comes to their stuff. Other brands that I've had better experiences with are dbx and ART.
  3. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
    Likes Received:

    I emailed AR and as usual they got right back to me...

    There is no thermal protection in the XO so I pulled both
    tweeters and sure enough the VC on my right hand tweeter
    is completely fried.. The left hand has also been over
    heated and is about ready to go..

    They said they will replace them no problem I just need to
    ship them down to the parts department in Maryland and they
    will ship me out a new pair..

    Now all I need to figure out is why...

    I wasn't clipping the amp.. Not by any stretch of the
    imagination... I am wondering now if the Tube Ultra-Q did
    this somehow or if they had been "Going bad" from when I
    was using my reciever's amp (it may have been clipping them)

  4. Javier_Huerta

    Javier_Huerta Supporting Actor

    Mar 9, 2002
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    Brett, FWIW, I own a Behringer UltraCurve.

    In order to make it work, I had to upgrade the EEPROM, add the digital input board, make my own RCA to 1/4" cable, and make my coax SPDIF to XLR digital cable, thus voiding my warranty twice and spending around $120 extra.

    So far, the thing works nicely... BUT it has a terrible turn-on "pop" which I'm sure can blow up a tweeter in no time.

    So now I turn on my eq first and the rest of my system afterwards. But it does make me think Behringer is not quite the best when it comes to quality stuff.
  5. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
    Likes Received:

    The Ultra-Q has a soft start so that thump doesn't occour
    and I am not running a digital in so I don't need a digital

    What was the EEPROM upgrade for? What was on the new PROM?

    I thought for sure this would be a simple deal, buy it..
    Make the cables... plug in in... woolah...

    It doesn't make sense... see if you agree..

    There is Channel 1 and Channel 2 on the Ultra-Q this I
    equate to Left and Righ since there is no technical left
    and right..

    The cables I made are regular RCA cables with RCA connectors
    on one end.. the center pin is the hot, the barrel is the

    On the other end I soldered on gold 1/4" Mono Plugs the tip
    is the hot, the body is the cold..

    So why the hell ain't this thing working?

    There are 2 banks of knobs and switches each bank is for
    one channel. Each channel has a mater toggle to turn the
    whole EQ section off.. If I enguage one switch the other
    channel cuts off, if I turn both on both channels cut off.

    Is this thing defective? Is this was fried my tweeters?

    Let me tell you, I KNOW I wired it right.. If this thing
    fried my tweeters I am going to take a sledgehammer to it
    then personally shove it up Uli Behringers (CENSORED)...

    I am no "Professional" but I am no idiot and wiring a pair
    of Mono 1/4 Plugs onto a RCA Patch Cord ain't rocket science
    and I even verified in the manual you can use mono plugs as
    unballanced, "stereo" plugs are Ballanced just like the XLR's

    I am LIViD..... HOT.. You name it

    I should have known I was expecting too much for $150.00
  6. Todd Beachler

    Todd Beachler Stunt Coordinator

    Sep 10, 2000
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    Brett, where exactly are you putting this in your signal chain and what are you doing with it? Also, I'm assuming you have the equipment to test your setup for the needed adjustments.

    I agree with Aaron_Smith. I'm also a musician and Behringer isn't known for it's quality. Behringer's stuff is entry level for people getting into their first rackmountable music equipment. It's on par with Alesis (not counting the Alesis ADAT stuff).

    Oh, yeah, sorry to hear about the ARs.
  7. Paul Stiles

    Paul Stiles Agent

    Oct 4, 2002
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    A long, long time ago in a stereo store far, far away, I bought an amplifier. I took the amp home and hooked it up. Everything worked fine for a few hours. Then I heard a brief sound that sounded like "bleeeeeeep", and then nothing from the amp. The amplifier thought it was an oscillator. It wiped out the tweeters in my speakers. Fortunately, the speakers were made by AR. I replaced the defective amp with another brand. I called up AR and told them what happened. AR sent me new tweeters. I was VERY pleased with AR. I had informed them that it was the amp's fault, but AR replaced the tweeters at no cost to me.
    Sounds as though the Behringer Tube Ultra-Q is turning part of your system into an Ultra-oscillator or Ultra-tweeter-cooker. IF you get another Behringer Tube Ultra-Q you may want to disconnect your speakers and hook an 0'scope up to the amp's outputs and veryify that the replacement is not another oscillator.
  8. ThomasW

    ThomasW Cinematographer

    Nov 6, 1999
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    Although not good for traveling musicians; the QC of Behringer products has improved over the last several years. Few people have reported problems when using it for HT use

    The only place this unit should be inserted with a receiver is a tape monitor loop or a pre-out.

    Many use the wrong jacks with pro gear. On this piece Behringer puts the inputs at the top and the outputs at the bottom. This is different from most hi-fi gear where things are placed side-by-side

    Amp clipping is what usually fries tweeters.

    Another possibility is that there is some DC offset in the unit. That can kill drivers too.
  9. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
    Likes Received:
    This unit is placed exactly where it should be in the signal

    Pre/Pro - Ultra Tube-Q - Power Amp - Speakers

    As far as how it is hooked up, the rear pannel is labeled
    in and out.. It's hooked up right..

    Like I said before I didn't think I was an idiot it seems
    fairly idiot proof to anyone who has worked with patch
    cords and soldering irons before..

    I even went as far as to test the cables after I did the
    soldering work with a Ohm Meter to make sure there was no
    melt through on the hot conductor from when I was
    soldering the sheild/cold side..

    I have absolutely no idea why when I try and engauge both
    channels of the EQ I get nothing...

    And I don't know what fried the tweeters.. The amp is NOT
    clipping.. I don't know if it's possible for the Behringer
    to clip but the damn thing was never working in the first
    place.. Sure the VU meteres moved, the tubes lit up but the
    parametric EQ did squat...

    And as for do I have the equipment to make use of this?
    Well... I don't have a 3 thousand dollar spectrum analyzer
    or a similarly priced handheld RTA.. I have a Rat Shack SPL
    Meter and I have TrueRTA and I have correction charts...

    But I never even got that far...

    I am just wondering if I should even chance using this
    thing again.... If maybe I should try XLR connectors
    instead... I don't know.. I just don't know what caused
  10. Wayne A. Pflughaupt

    Aug 5, 1999
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    Katy, TX
    Real Name:
  11. Javier_Huerta

    Javier_Huerta Supporting Actor

    Mar 9, 2002
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    Brett, Wayne beat me to it. When you wired the 1/4" jacks to the RCA connectors you did it right (I did the same thing myself when I ran my UltraCurve in analogue mode). But I began using the digital input on my Ultra-Curve because I needed a 6V signal to drive the equalizer properly, and my equipment could barely put out 2V. The difference existing because of the output mismatch between home / professional equipment.

    On the UltraCurve, I can adjust the input level by some internal menu. I could never adjust it properly for 2 volts, though. Can you set up your Ultra-Q internal levels, too?

    I had to reprogram my EEPROM because my software version couldn't do Auto-Q, didn't support the digital inputs, and had a couple of undisclosed bugs. Come to think of it, AFAIK, UltraCurves are still being sold with the old software version (1.2).

    You can also try e-mailing Behringer - I found their tech support helpful in this respect.

  12. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
    Likes Received:
    Okay I guess I better clarify some..

    The Tube Ultra-Q is nothing like the Ultra Curve there is
    no digital input and there is no menu there is nothing
    you can change.. It's just a paramtetric EQ and tube
    section it's not software driven other than the UTC Ultra
    Tube Circuit which is just something that compares the
    signal comming in and the signal going through the tubes.

    The only thing they talk about in the manual as far as add
    on's is the OT-1 Output transformer (?)

    It also talks about the 1/4 and XLR being wired in paralell
    and how it can make a 6DB adjustment in level between
    ballanced and non ballanced.

    I emailed Behringer and I am waiting to hear back from

    I should also clarify that yes I am using the Pre Outs on
    my receiver nothing else..

    I can adjust the output of my Pre's through Intellivolume
    I can do from 0DB to 12DB boost and the Behringer will do
    from 0 to +18 DB Boost and also 18DB cut on the main input
    and then there is an adjustable 5DB Boost/Cut per filter
  13. Stephen Dodds

    Stephen Dodds Second Unit

    Aug 29, 1998
    Likes Received:
    You could try some of the cheap RCA to 1/4" adaptor plugs that Radio Shack have. I've used them with Behringer gear with no problems. Then you'll know if is your wiring or not.


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