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Author Topic: Series/Parallel  (Read 13116 times)
fixxe
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« on: May 09, 2011, 08:45:23 PM »
Hey,
I ordered a Bluesmaster 100W from Nik and got a 2x12 cab with Celestion G12-65 now.
So my question is if I should wire it in series or parallel? Has any of you guys compared both?

thanks!  Smiley
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jestaudio
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« Reply #1 on: May 09, 2011, 09:17:32 PM »
parallel is my prefernce, i use 2 celestion leads in trace elliot cabs . boyh are 16 ohm which gives a load of 8 ohm in parallel, if you went series you would need 2x4 ohm for a 8 ohm load or 2x8 for a 16 ohm load, you would also have to insure both speakers were in phase under either senario
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SoundPerf
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« Reply #2 on: May 09, 2011, 11:00:34 PM »
I went with 2X12 16ohm in parallel for 8ohm load.
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fixxe
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« Reply #3 on: May 09, 2011, 11:03:10 PM »
sorry, forgot to mention... they're 8 ohms
so I could go either way.
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boldaslove6789
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« Reply #4 on: May 09, 2011, 11:22:01 PM »
IMO Using 2 x 8ohm G1265's they sound best wired up in parallel @ 4ohms..
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« Reply #5 on: May 10, 2011, 08:13:05 PM »
Parrallel sounds better to me. They are also more reliable. If 1 wire or speaker on the series settup goes bad you just lost all your sound. With a parrallel settup you will still get sound, you'd just need to compensate impedance at the amp, if you had lost a speaker, for example.
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fixxe
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« Reply #6 on: June 02, 2011, 10:51:46 PM »
hmm, how did you wire those 12-65s in parallel? i already wired them to be in series, which was quite the hassle with their tiny hooks  Angry
so how would wire them parallel. or whats the trick of wiring 12-65s in general (considering their small hooks)Huh?  Huh?
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SoundPerf
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« Reply #7 on: June 03, 2011, 01:36:11 AM »
Quote from: fixxe on June 02, 2011, 10:51:46 PM
hmm, how did you wire those 12-65s in parallel? i already wired them to be in series, which was quite the hassle with their tiny hooks  Angry
so how would wire them parallel. or whats the trick of wiring 12-65s in general (considering their small hooks)Huh?  Huh?
Here's a chart.
http://www.el34world.com/charts/Charts.htm

Doing them in parallel won't be any harder. What guage wire are you using?
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Chris

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plasticvonaband
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« Reply #8 on: June 03, 2011, 02:21:56 AM »
I went parallel as well. 2x16 ohm to run at 8 ohms. I use weber 1265 alnico and they sound phenomenal.
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Pickmaster
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« Reply #9 on: June 03, 2011, 09:40:09 AM »
Parallel wiring is a best choice. Also one thing to remember, high inductive reactance (ohmage) reduces high frequency and volume, so if your speakers are dark (G12-65s for example) it is better to have them in parallel 4 Ohm.
For more open, Fendery SRV tone I use two 16 Ohm G12 Centuries in 8 Ohm cab.
Here is a sound sample http://www.guitarampcab.com/cclean.mp3
« Last Edit: June 03, 2011, 09:44:19 AM by Pickmaster » Logged
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Thilo278
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« Reply #10 on: June 03, 2011, 10:16:44 AM »
Pickmaster, did you try a G12 Century together with a G12-65?
Would be interested if that is a good match.
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Pickmaster
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« Reply #11 on: June 03, 2011, 11:13:19 AM »
Quote from: Thilo278 on June 03, 2011, 10:16:44 AM
Pickmaster, did you try a G12 Century together with a G12-65?
Would be interested if that is a good match.

Yes, at the CCC we tried loads of different combinations.
The G12-65 and Century won’t work well together because of huge difference in db –
Century is 102 db and the G12-65 is 97, so you can’t hear 65 at all. Century is to loud.
Century works well with the Fane Studio 12L, Fane AXA 12 alnico, Emi Delta Lite II, Emi Wizard and other high db speakers.
« Last Edit: June 03, 2011, 01:06:07 PM by Pickmaster » Logged
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Tone Control
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« Reply #12 on: June 03, 2011, 01:39:52 PM »
Quote from: Pickmaster on June 03, 2011, 11:13:19 AM
Quote from: Thilo278 on June 03, 2011, 10:16:44 AM
Pickmaster, did you try a G12 Century together with a G12-65?
Would be interested if that is a good match.

Yes, at the CCC we tried loads of different combinations.
The G12-65 and Century won’t work well together because of huge difference in db –
Century is 102 db and the G12-65 is 97, so you can’t hear 65 at all. Century is to loud.
Century works well with the Fane Studio 12L, Fane AXA 12 alnico, Emi Delta Lite II, Emi Wizard and other high db speakers.


Do you find the impedance variations between models (overall and across the frequency spectrum) affect this a lot too?
I find sometimes a pair will differ the opposite way to what I expected from the published sensitivity spec, presumably because of the impedances not being identical
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bluesfendermanblues
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« Reply #13 on: June 03, 2011, 02:12:18 PM »
@Thilo278,

if you already have purchased a 12G65 and a Century you can make a L-pad for the Century in order to take it down 5 dB's: http://www.sengpielaudio.com/calculator-Lpad.htm
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Pickmaster
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« Reply #14 on: June 03, 2011, 04:22:12 PM »
Quote from: Tone Control on June 03, 2011, 01:39:52 PM
Quote from: Pickmaster on June 03, 2011, 11:13:19 AM
Quote from: Thilo278 on June 03, 2011, 10:16:44 AM
Pickmaster, did you try a G12 Century together with a G12-65?
Would be interested if that is a good match.

Yes, at the CCC we tried loads of different combinations.
The G12-65 and Century won’t work well together because of huge difference in db –
Century is 102 db and the G12-65 is 97, so you can’t hear 65 at all. Century is to loud.
Century works well with the Fane Studio 12L, Fane AXA 12 alnico, Emi Delta Lite II, Emi Wizard and other high db speakers.

Do you find the impedance variations between models (overall and across the frequency spectrum) affect this a lot too?
I find sometimes a pair will differ the opposite way to what I expected from the published sensitivity spec, presumably because of the impedances not being identical
Hi Tone,

Yes, you are correct.
That happens mainly when you have two similar db, but different power rated speakers.  For example Fane AXA12 alnico and Celestion Gold. At the 50watt Gold will sound louder because it’s max db is calculated at the max power output, when Fane at 50 watt just starts to produce probably 95 – 97 db pressure and reaches maximum at 100 watt. So if you have 2x12 cab with those speakers (150 watt) Gold would dominate near 15 - 50 watt and AXA will be louder at 70 - 100watt.
Also bright speaker sounds louder than same db rated dark one but it is only on high frequencies and it’s just our perception on sound.

Cheers
« Last Edit: June 03, 2011, 04:26:43 PM by Pickmaster » Logged
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