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Post by pistolpete on Dec 18, 2019 4:15:18 GMT -7
Just a question for the masses. For years I’ve had an old style Z Cab loaded with a weber blue dog. Its a 4 ohm speaker and I’d Generally use it with a champ combo or with an old tremolux. It has become one of my favorite speakers. I’d like to build a 1x12 Cab with a 16ohm blue dog for use with My Stangray. Just with the change in impedance all other specs being identical, will there be any Change in sensitivity or the overall tone?
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Post by nicholas on Dec 18, 2019 6:31:32 GMT -7
You'll probably get some varried responses here. Personally I've used the same brand / model speaker, one was 8 ohm and the other 16. If there was any difference, I couldn't pick it out. Definitely not something where you'd turn on the amp the next day and think it sounded off.
Where I do hear an obvious difference is in wiring multiple speakers differently. For instance a 412 with 16 ohm speakers wired in the standard series / parallel at 16 ohms will sound totally different if wired all parallel at 4 ohms, with the same exact speakers.
I did find this online a while back when I was wondering the same thing. This if from a guy at Eminence.
"The physical differences between an 8-ohm and a 16-ohm speaker of the same type generally come down to voice-coil wire size and the number of voice-coil wire turns in the magnetic gap. When a speaker is manufactured, different wire is used for winding the voice coil based on the desired speaker impedance. The wire used to wind an 8-ohm voice coil will be of a particular size and will be applied with a particular number of turns. The coil, once wound with this wire, will have a certain diameter and weight. This wound coil will then not only determine the impedance of the speaker, but will also be somewhat of a determining factor in the SPL (sensitivity) and frequency response of the speaker. If the same voice coil was wound to be 16 ohms, a smaller, lighter wire would be used and the number of turns would be increased to achieve the desired impedance. This will change the physical characteristics of the wound coil, which may slightly affect the sensitivity and frequency response of the speaker. A higher number of turns in the 16-ohm coil may slightly increase the response of the speaker at higher frequencies due to an increase in inductance. This potential change, however, may be offset to some degree by the possible increased weight of the 16-ohm coil due to the increased number of windings. We’re talking total weights in grams here, but every little difference has the ability to affect some type of change. This may be a lot of information to process, but the bottom line is that two of the same speakers have the potential to be slightly different in tone and response, but probably not to any substantial degree. Generally, any perceived difference might be that the 16-ohm speaker could be a bit brighter.
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Post by steiner on Dec 18, 2019 6:54:24 GMT -7
Different impedance will also influence how the output transformer reacts. Higher impedance will utilize the full turns on the transformer. Most of my speaker cabs are 16ohm.
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Post by daddyelmis (Greg) on Dec 18, 2019 6:59:12 GMT -7
Like Edward, I’ve run both and in a 1x12 or 2x12 i cannot hear a difference. But I’m not Eric Johnson😁
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Post by pistolpete on Dec 18, 2019 6:59:15 GMT -7
Nicholas, can’t thank you enough for that information. That answers a ton of questions I’ve had rolling around Upstairs for years. So since it’s a 1x12 i bet the difference Will be basically inaudible. Its a 50 watt blue dog so A slight ramp up in the high end wouldn’t be a bad thing. PP
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Post by KeithA on Dec 18, 2019 7:39:25 GMT -7
I've I'm reading correctly, you are going to build a 112 cab?
I suspect the most variation you'd get is in the quality/design of the new cab vs the actual speaker/impedance differences.
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Post by pistolpete on Dec 18, 2019 7:54:43 GMT -7
I've I'm reading correctly, you are going to build a 112 cab? I suspect the most variation you'd get is in the quality/design of the new cab vs the actual speaker/impedance differences. [ Yes, i have a good quality 2x10 cab just slightly larger than the old style Z cab that is convertible. I’m going to re baffle it for a 1x12. The 50 watt blue dog is fantastic, just a tick warmer than the Gold.
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Post by pcns on Dec 18, 2019 7:56:19 GMT -7
I've I'm reading correctly, you are going to build a 112 cab? I suspect the most variation you'd get is in the quality/design of the new cab vs the actual speaker/impedance differences. I was thinking along this line too, you are more likely to hear difference from other factors that are NOT the impedance of the speaker, this could include manufacturing variation in the speaker itself . . . . .
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Post by pistolpete on Dec 18, 2019 9:37:16 GMT -7
Thanx Fellas! I’ll keep You Posted.
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