June 15th, 2012, 07:39 PM
May sound like a dumb question I guess, but knowing that you usually have a speaker rated above the amp's listed rating, should this 15 watt 8 ohm L-Pad be fine with the PJ, assuming that it peaks at a higher wattage?
I already had the L-Pad in another amp, but decided to rig it up in a PJ I just got, and it works GREAT... but if I should get a higher rated L-Pad to protect the amp, I will.
Thanks for any replies.
June 15th, 2012, 09:38 PM
The main thing would be the impedance load match.
Assuming you rarely if ever crank the PJ up over 15 watts (it is 2xEL84 which /should/ give 17 watts if set to 11 ;).
I can't think anyone apart from kiddies regularly maxes out their amp because it sounds naff.
I wouldn't worry about transient current peaks, power is a sort-of averaged thing anyway (watts is watts, it is a heating effect, not dealing with a fuse)
June 16th, 2012, 01:13 AM
Thanks for the response jefrs.
Yes, I think it'll be fine now... Just gets warm after playing for a while, even with the amp on 12 and L-Pad barely cracked open on 1. It is 8 ohms, and I tested it across the full range and it reads approximately from 7 to 9 ohms, so it stays real close to 8 ohms.
Instead of mounting it permanently, I used a small volume box I built a year or so ago out of a plastic project box, 1/4" input jacks, and a 250K pot, and put the L-Pad in there instead of the 250K pot, leaving the bottom of the box off.
Using a male/male 1/4" plug I can just plug the assembly right up into the PJ chassis speaker output jack, and with auto trim mounting tape I attached the metal bottom crossway on the side of the project box to stabilize it against the back panel so it doesn't twist. It has some fuzzy velcro strips on it to stop vibration against the inside of the back panel.
And despite how it may look, it's actually easy to get to the volume knob with one finger to adjust it, and doing it this way I can remove the L-Pad any time I want and not have any holes left in the amp. Also have no knobs protruding :wink:
Here's some pics: