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Topic: Webb 6-14E tech ? |
Steven Welborn
From:
Ojai,CA USA
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Posted 2 Jul 2004 9:12 pm |
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| with a 4 ohm speaker in the amp and a 4 ohm speaker plugged into the ext. spkr out, is the amp seeing 2 ohm OR 8 ohm load? thanks. |
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Dave Beaty
From:
Mesa, Arizona, USA
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Posted 2 Jul 2004 10:37 pm
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Hi Steven,
If two speakers which exhibit 4 ohm impedance are connected in parallel to a common single amplifier output stage, it will "see" a combined impedance of 2 ohms.
Some amplifiers offer multiple output stages which can be connected in parallel to provide higher output power capability. In such cases, it is possible to "un-bridge" the outputs of two such amplifiers and feed the internal speaker with one and an external speaker with the other. Depending upon the impedance of the available external speaker, this can be advantageous. More than likely, this is not the case with your amplifier and if it is truly designed to drive 2 ohms impedance, and if you have two 4 ohm speakers, you would do best to parallel them (you just have to be sure that the minimum acceptable impedance your amplifier can drive is really 2 ohms and not 4 ohms as many commonly are).
Dave |
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Jay Ganz
From:
Out Behind The Barn
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Posted 3 Jul 2004 5:43 am
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I wouldn't recommend pushing the amp to
hard if your hooked to a 2 ohm load. It might
tend to get a little stressed out.
------------------
My Steel MP3's
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Steven Welborn
From:
Ojai,CA USA
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Posted 3 Jul 2004 4:13 pm
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| Webb does list a minimum of 2 ohms on the back panel(2-4-8 ohms). My reason for wanting to use an additional 15" ext.spkr is to reduce stress on a single speaker for a bass gig. Neither 15" speaker is a true "bass" speaker( JBL E130 and BW 1501). I figure with two I can run drive each at a lower volume. Maybe my thinkin's wrong...I dunno. |
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Brad Sarno
From:
St. Louis, MO USA
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Posted 3 Jul 2004 8:13 pm
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That amp will do 2 ohms, or at least it says it will, but I'd be very cautious running bass at 2 ohms. It's those low frequencies that can get you into dangerous territory. I wouldn't be so afraid if it was E9 steel, but bass, I wouldn't risk such a precious amp for that task when there are much better voiced and suited amps for the job.
Brad Sarno |
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John Floyd
From:
R.I.P.
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Posted 4 Jul 2004 4:33 am
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| Quote: |
| My reason for wanting to use an additional 15" ext.spkr is to reduce stress on a single speaker for a bass gig. |
But what you want to do will increase Stress on the Power amp!
I'm with Brad on this , there are Inexpensive and less valuable bass amps out there that will do what you want and better voiced for Bass.
Sorta like using a Screwdriver for an Ice pick, It will work, but not as well. |
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Steven Welborn
From:
Ojai,CA USA
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Posted 4 Jul 2004 10:20 am
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| I appreciate the advice. Many thanks. |
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Bill Cutright
From:
Akron, OH
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Posted 4 Jul 2004 6:19 pm
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| I've used my Webb as a bass amp (with an additional, external 15", 8 ohm speaker) a couple of times, and it performed well and didn't run any noticably warmer than when I use it for steel. (Would that have been 6 ohms total imp??) |
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Roger Kelly
From:
Bristol,Tennessee
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Posted 5 Jul 2004 3:33 am
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| No, it would be 2.66 ohms. 8x4=32 divided by 8+4=12. As a rule of Thumb, parallelling 2 speakers of different ohms will result in a total resistance or Impedance, less that the lowest value of the two. Happy 4th of July. |
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