|
|
Post by runninwiththerevil (Matthew) on Aug 18, 2024 6:49:33 GMT -7
Hi all,
I have one of the older model 110's that has an 8 and 4 ohm output from the amp and then also has an external speaker out built in that is labeled 8ohm. Does anyone know the proper use of these outputs? If you are going to run the internal 8 ohm speaker do you plug the wiring harness into the 8 ohm if NOT running anything in the external. Should you plus into the 4 ohm out if you plan to run the internal speaker along with an 8 ohm extension?
Anyone with knowledge I would appreciate it.
|
|
|
|
Post by pcns on Aug 19, 2024 6:47:44 GMT -7
can you take a picture?
|
|
wally
Junior Member
Posts: 53
|
Post by wally on Aug 21, 2024 15:07:28 GMT -7
Subscribing. Do you have a picture of that back panel? If I had that amp in front of me, Inwould pull the chassis
and study that third Jack to see how it is wired….what tap it is working on, Your amp should have an output transformer that has three taps…4,8, and 16 ohms. The Carmen Ghia usually does not have the 16 ohm tap wired to a Jack…it is not used.
I take it you bought the amp used? One might suspect that someone has modified this amp; but with the OEM output transformer, the only way two 8 ohm jacks make sense is if someone wanted to run two 16 Ohm cabs in parallel on the 8 ohm tap. Imho, needs to figure out what has been done and explain what you have there. A picture of the wiring at the jacks might give some clues.
If you have a multimeter, you could read the resistance there. With the amp off, plug in a speaker cable to one 8 ohm Jack and read the resistance. It will be very low.
Compare that to the resistance you read on the other ‘8 ohm’ jack. It should read the same as the first one IF it is connected to the same tap. The 4 ohm tap will read a slightly lower resistance. Ex: I just took readings on my 2013 Ghia. The 8 ohm tap reads 0.9 ohms. The 4 ohm tap reads 0.8 ohms. The 16 ohm tap on this OT would probably read 1 ohm if it were wired to a Jack.
|
|
wally
Junior Member
Posts: 53
|
Post by wally on Aug 27, 2024 6:14:45 GMT -7
Ghost.
|
|
|
|
Post by runninwiththerevil (Matthew) on Aug 28, 2024 9:20:30 GMT -7
|
|
|
|
Post by scottyc13 on Aug 28, 2024 14:01:20 GMT -7
That looks like it’s in series with the other speaker out jacks. I would think it would be set up to work as its own output, so you would either use that for an external speaker or the plug the combo speaker into its normal jack. |
|
|
|
Post by runninwiththerevil (Matthew) on Aug 29, 2024 14:22:19 GMT -7
The normal speaker is wired right into this output.
Just to make sure I have the right understanding, if I am running the internal 8 ohm speaker and plug an external 8 ohm cab, if it’s wired in series I would leave it plugged into the 8 ohm tap, or should it be plugged into the 4 ohm?
|
|
wally
Junior Member
Posts: 53
|
Post by wally on Aug 30, 2024 7:30:09 GMT -7
If I am understanding that picture, that Jack is intended to be used for an extension speaker, correct?…with the
Speaker lead connected to the internal speaker through this Jack connection.
In that case, it is wired in parallel.
So two 8 ohm loads would give the amp a 4 ohm load, and you would want to be plugged into the 4 ohm Jack on the back of the chassis.
Fwiw, it serves a guitarist well to own a Multimeter. A meter is a valuable tool even if a person is not a tech. One can check the speaker
Load with the ohmmeter and be assured of what is going on in a situation such as this. One can determine if a speaker is dead. One can check wall voltages.
One can assure that instrument and speaker cables are good to use. Other than a multimeter, which does not have to be an expensive unit for these basic things, a guitarist would do well to have a wall outlet tester to assure that an outlet is correctly wired. These two tools can be had for less than $30-40…for both. The multimeter could save an output transformer. The wall outlet tester could save a life.
|
|
