Want that vintage Tweed tone and an earlier breakup? This is our Low Output Tweed Option, the kit contains a matched pair of JJ EL844's to drop the overall output a couple decibels, a JJ 12AY7 for V1 and a balanced ECC83S for the phase inverter in V2. The Tweed Option drops the preamp gain a bit more than the SRV option allowing even more power tube breakup from the EL844's.