HELP, Speaker upgrade/ Ext'n Cab

[keithmantle]

Hi All, I have a peavey classic 30w all valve amp 16 ohm 1x12" spkr, can i upgrade witha Cel Alnico gold 75 w 8 ohm, or use it in a extension cab, the peavey has a Ext'n jack socket, also how can i check if the 'Gold' spkr is not 'worn' out/damaged. thanks

[dave robinson]

Does it specify an impedance on the extension speaker socket ?

[sixtiesman]

I think you'll have to do a bit more research in the peavey forums. Some imply that just by inserting a jack plug ( on its own ) switches the tap to 8ohms.
This would make the posts below ( which I found in various forums ) correct.

My guess is : plugging a 16 ohm speaker into the extension socket is OK and will run both 16 ohm speakers.
To run an 8 ohm speaker, you would have to run it on its own by disconnecting the internal speaker altogether and plugging into the extension socket which would flip the output to 8 ohms.


posts:-

If you have a 16 ohm extension cab then pluging it into the classic 30 switches the output transformer to 8 ohm mode and runs the internal and external speakers in parallel.

From Peavey support.
...to run an 8 ohm ext cab...
[1]disconnect the cable going to the internal speaker and tape up the ends...
[2]connect your 8 ohm cab to the extension jack...that way, the amp will see an overall load of 8 ohms and will function properly...

[keithmantle]

On the back panel close to the Ex/jack socket it says 30 watts 22V RMS 16 Ohm minimum load, not sure if this applies to amp or to a Ex Cab. thanks for all advice, taking into account what has been said could i replace the 16 ohm stock spkr and put in the 8 ohm Gold as a upgrade.?

[keithmantle]

Thanks Paul.

[C-C]

hi,
The Celestion Alnico Gold 10" is 40 Watt, And the Celestion Alnico Gold 12" is 50 Watt.
That is the rating I have on the Two Speaker I have.
You mentioned 75 Watt. Just thought I let you know in case you are after a bigger wattage Speaker.
Carl

[keithmantle]

Hi Carl, On the back of the Ex cab (marshall) it says Lead 1 75w, all i can assume is that the speaker has been changed to the Cel Al Gold at some point, is there anyway to check the gold spkr age ?, Thanks

[Didier]

hi,
The Celestion Alnico Gold 10" is 40 Watt, And the Celestion Alnico Gold 12" is 50 Watt.
That is the rating I have on the Two Speaker I have.
You mentioned 75 Watt. Just thought I let you know in case you are after a bigger wattage Speaker.
Carl

Speaker power rating is the maximum power that it can handle without damages, so with a 30 amp, 50, 60 or 75 W rated speakers will be fine. For the sound level you have to look at the sensivity figures.

Didier

[C-C]

Hi,
As Didier said using larger Wattage Speakers are OK.
Most of the Amp heads I use, I try to keep the Wattage close to the Amps output
in order to work the speaker.
But this is my own preference.
Carl.