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08-17-2011, 12:14 PM
| | Registered User | | Join Date: Sep 2007 Location: Detroit | | | 8 ohm to 4 ohm?
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I've got a GK400RB head and an 8 ohm GK115RBS cabinet.
The head puts out (I think) 120 watts at 8 ohms; 200 watts at 4 ohms.
The spekaer is fine, but is it ignorant to think about replacing the speaker with a 4 ohm? If not, how does one determine which speaker to use?
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08-17-2011, 12:19 PM
|  | Registered User | | Join Date: Mar 2010 Location: Atlanta, Ga. | | | I would just get another GK115RBS cab and run both for a combined 4 ohm load......
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08-17-2011, 12:35 PM
| | Registered User | | Join Date: May 2006 Location: austin,tx | | | +1 |
08-17-2011, 12:40 PM
|  | Real Basses Have 5 Strings! | | Join Date: Jan 2008 Location: Colorado | | Quote:
Originally Posted by tdub0199  I would just get another GK115RBS cab and run both for a combined 4 ohm load...... | Yep ... that is a good solution. |
08-17-2011, 12:44 PM
| | | | The reason that this is good advice is two-fold:
1. Output is all about how much air you move; and
2. The price of a second 8 ohm cabinet is not substantially greater than a replacement 4ohm speaker for the existing cabinet.
So, get a second 8 ohm cab and run them in parallel, which gives you the 4 ohms you want with the movement of twice as much air. What you end up with (assuming the numbers you posted are correct) is two 15s being pushed at 100W each, but twice as much air.
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08-17-2011, 12:47 PM
| | Registered User | | Join Date: Jan 2006 Location: Brookfield, CT | | | All of that....^
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08-17-2011, 01:20 PM
| | Registered User | | Join Date: Jul 2007 Location: Dallas, TX | | | Yes, all true. Besides, the volume difference between the 8 ohm cab vs an identical 4 ohm cab would be near zero. Adding the 2nd matching cab will net you +6dB.
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08-17-2011, 01:26 PM
|  | <---Shinola Shite--^ | | Join Date: Dec 2010 Location: Manitoba, Canada | | | yep, add a cab.
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08-17-2011, 01:56 PM
| | Registered User | | Join Date: Sep 2007 Location: Detroit | | Beautiful!. You guys rule! Now that that's settled...
Would a GK115 sbx II match up OK with the other GK cabinet. I think the main difference is the sbx has a tweeter. I think... This is it, and it's pretty close to home: GK Gallien 115SBX-II 1-15 Bass Cab
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Michael May & The Messarounds; The Okie Dokie Stompers; The Sen-Say-Shuns
Kay Swingmaster; Underwood p/u; 1953-54 P; GK400RB; Avatar 410 Neo
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08-17-2011, 02:19 PM
| | Registered User | | Join Date: Jul 2007 Location: Dallas, TX | | | If the only difference is the tweeter, it would make a perfect match.
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08-17-2011, 02:30 PM
|  | Registered User | | Join Date: May 2004 Location: Seattle, WA | | | If I'm not mistaken, the SBX stuff was/is sealed. Is the RBS series sealed or ported?
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08-17-2011, 03:57 PM
| | Registered User | | Join Date: Sep 2007 Location: Detroit | | | I believe you're correct, silky smoove. Would that have an effect on these cabinets matching up?
I tried to find another 115RBS, but no luck here, ebay or Craigslist.
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Michael May & The Messarounds; The Okie Dokie Stompers; The Sen-Say-Shuns
Kay Swingmaster; Underwood p/u; 1953-54 P; GK400RB; Avatar 410 Neo
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