Hello all! New member here. I have started messing with amps over the last few weeks. I have built a couple of CBGuity's 2.5 watt little practice amps. The first one I used all the stock components in a nice Underwood box. The second one I used the amp board and used 2 of their speakers wired parallel for 4 ohm load. I made a 3rd one with their board and a 4" 4ohm Boss speaker.
I would like to get a "Bigger" sound. I know it's only a 2.5 watt amp, but I'd like to get a more full sound if that makes sense. More bass instead of "tinny" sound. Would building a big box and using a 6"-12" Celestion or Jenson or ??? speaker make it sound better? Or am I asking for too much out of that little 2.5watt board?
I bought a Tone Monster 5 amp unit for my next build and was thinking of building a nice cabinet for it. I was looking at the Jenson 6" Mod speaker for it, but am open to any other suggestions. 10"-12" Celestion or any other speaker? Will that make a "Bigger" or "fuller" sound? Or am I just asking for too much? Heck, I can just run my guitars through myPeavey Transtube or Peavey Ultra 60 tube head and 4x12 cabinet, but I never turn it past 2 or the neighbors will disown me. Besides that, I built these guitars and really want to run them through something that I built just for the satisfaction of doing it myself. Isn't that kind of why we all build them? Lol.
Something else I don't understand is the Ohm rating on speakers. What is the relationship between higher ohm ratings and sound output? I have a good understanding of Ohm's law as it relates to car wiring since I'm an automotive tech and I do a lot of electrical/electronics diagnosis on cars, but not sure about audio. Can anybody point me in the right direction for reading up on it? I am guessing that too low an ohm rating (resistance) would pull too much from an amp board and smoke it? What about higher decibels? Does a higher or lower ohm load have anything to do with decibel output?
Thanks in advance for any help or advise. Here is a build I'm working on. Matching Underwood pieces. I've been playing the guitar acoustic, but just received an Electric Delta 3 pole pickup from CBGuity that's going in it. Next to it is a 2.5 watt Artec amp from CBGuity as well. Built it stock with the complete 2.5 watt amp kit.
Side note. How do I size these pictures? I think I'm posting them too big.
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Paul is right. Speakers rated in the realm of three digits (i.e. 100-300 watts) need higher powered amps to drive them into their "sweet spot" of operation. I had a client ask me to use his 300 watt car speaker cabinet to make an amp with my 1/2 watt circuit. It wouldn't even make a sound.
A good rule of thumb (but of course, rules are meant to be stretched here) is to use a speaker that is anywhere from double to triple the amp's output rating. I believe Guitar Fuel suggests using a 15 watt 8 ohm speaker for their MAH5 five watt unit.
On the other hand, using a speaker that is rated at the same output as the amp circuit will result in the speaker constantly operating at it's maximum, and can cause clipping or cone failure.
If you haven't already, try that 15w into your car speakers & see how it sounds. I bet it sounds OK.
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