Weber Speakers 12A125ADimensions 11.8 by 9.75, 5 deep (30cm x 13cm x 24cm). The item Vintage Yamaha G5 Guitar Amp With Ted Webber Signature Series Alnico Speaker is in sale since Wednesday, March 27, 2019. These amps were known for their real spring Reverb, warn natural sounding overdrive and the finger-jointed wood cabinet.