Just built a box amp with the CB Gitty amp kit and am very well satisfied. I found a nice big box that would easily accommodate two speakers. My question is will the 2.5 watt circuit board push two speakers?
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here is a great calculator.
http://speakerimpedance.co.uk/?act=two_series&page=calculator
Yes, it will drive two speakers if...
1. The speakers are wired to match the suggested impedance. For example, two 16 ohm speakers wired in parallel to the jack (positive to positive, negative to negative) will result in an 8 ohm load. Or, two 4 ohm speakers wired in series (see internet for that schematic) will also result in an 8 ohm load.
Pictured here is a two speaker amp I built from a pair of re-purposed JVC 20 watt stereo speakers, rated at 4 ohms each. The circuit is a 1/2 watt LM386 board that I wired myself. Powered by one 9 volt battery.
Thanks. That helps a lot. When I first started building I was interested in the guitars but I think amps are fun too.
Yes, they are. I've made many with the LM386. I've also made some using a 2 watt and a 5 watt circuit harness from Guitar Fuel...found on their website or on Ebay. Speakers are easy to find in thrift shops. I can find them for $5 for a pair.
My next amp project will be a 1 watt tube amp head (or maybe a combo) built into a cigar box.
Cool. Please post Pictures. I found some neat old cases for enclosures at thrift stores yesterday. For less that $10 I got enough build materials to last the rest of the year.