Joe Williams
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  • Topeka, KS
  • United States
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Joe Williams's Discussions

2 channel amps

Started this discussion. Last reply by Jerry Jordan on Saturday. 7 Replies

What are the practical effects of running a mono input into a 2 channel amp and taking the output from just one channel?Continue

speaker connection

Started this discussion. Last reply by wes carl on Sunday. 13 Replies

If there is no indication on the speaker, no +/- and the lugs are identical, is there a way to tell + and -, or does it not matter?Continue

speaker placement

Started this discussion. Last reply by Joe Williams Jul 31. 4 Replies

I'm building a tiny amp in which the 2 speakers will fire out opposite sides. In order to fit, the magnets of the speakers will be in very close proximity, essentially touching in fact. Problem?Continue

pickup

Started this discussion. Last reply by Joe Williams Jul 18. 10 Replies

I need another installment of electronics education. I have so far just used piezos, this is my first with a mag. pickup. I don't even know what it is, the guy at the music store, fished it out of a…Continue

 

Joe Williams's Page

Latest Activity

wes carl replied to Joe Williams's discussion speaker connection
"they are marked for a reason  I have found having the speaker with the terminals pointed at you the positive is generally on the right  it is best to test if not marked or you don't have a similar speaker to look at  I use Ford…"
Sunday
Jerry Jordan replied to Joe Williams's discussion 2 channel amps
"You may be able to bridge the output of a 15wx2 amp to one speaker for a 30 watt output to a single speaker. I believe it depends on the circuit and output class of the amp."
Saturday
Joe Williams replied to Joe Williams's discussion 2 channel amps
"Perhaps, but there is to be only one speaker and a mono input."
Saturday
Jerry Jordan replied to Joe Williams's discussion 2 channel amps
"15wx2 is a power amp circuit, for home or car stereo, you will still need a preamp circuit to drive it. Those are only a few bucks on eBay as well.,,. Happy building!!!"
Saturday
Cause the Blue rat replied to Joe Williams's discussion 2 channel amps
"If your talking a two channel power amp then there is no practical reason use half an amp. You would end up with one amp running a 'load' and the other no 'load'  Now if your talking a two channel guitar amp. You can set…"
Saturday
Jerry Jordan replied to Joe Williams's discussion 2 channel amps
"“2x15” implies a 2 channel power amp. Designed as a stereo power amp. You could run mono in and one side out, but dual mono in and two speakers would use both channels of the amp. But you’re talking about  a power amp that…"
Saturday
Joe Williams replied to Joe Williams's discussion 2 channel amps
"I imagine you've seen them on ebay. 15wx2 pre-built circuits. Not an amp, just a circuit, to be built into an amp."
Friday
Jerry Jordan replied to Joe Williams's discussion 2 channel amps
"Normally a two channel amp is a two channel pre-amp fed to a mono output amp, and from there to the speaker. What type of "two channel" amp are you referring to? "
Friday
Joe Williams posted a discussion

2 channel amps

What are the practical effects of running a mono input into a 2 channel amp and taking the output from just one channel?See More
Friday
JL replied to Joe Williams's discussion speaker connection
"I'll jump on the other side of the wall, polarity on a speaker is an arbitrary convention you set and stick with to make sure they are in phase with each other when sing more than one. That kick drum 'thump' is about 25 push and pull…"
Aug 9
Taffy Evans replied to Joe Williams's discussion speaker connection
"Yep, that's what I thought Timothy, in a stereo situation its best to have both speakers working in phase with each other, both cones moving in the same direction at the same time, for a more fuller sound. When related to the guitar, I see it…"
Aug 7
David L. replied to Joe Williams's discussion speaker connection
Aug 7
Gus K replied to Joe Williams's discussion speaker connection
"We are talking about the OP's, unmarked, undifferentiated  speaker.  "
Aug 7
Todd Richardson replied to Joe Williams's discussion speaker connection
"I use a 9v battery if the speaker moves (out) first you have the polarity correct."
Aug 7
David L. replied to Joe Williams's discussion speaker connection
"I am not convinced speaker polarity makes a difference in a guitar amplifier (compared with a bass guitar - not my area of interest).  Looking on the www there are two groups with opposing views. Digging a bit deeper I found this…"
Aug 7
Timothy Hunter replied to Joe Williams's discussion speaker connection
"it matters more for the lower frequencies ie low mids and bass.if wired opposite then on the thump of a kick drum the speaker will "suck in " instead of giving a push of air forward. "
Aug 7

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How did you learn about Cigar Box Nation?
Surfing.
How many instruments have you built so far?
50+
What do you find most interesting about cigar box guitars? (If you do not enter something meaningful here, your membership may be rejected).
I've built all kinds of stringed instruments. No CBGs yet and nothing electric. Looking to broaden my horizons.

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