POST # 352 MYSTERY CASE No. 6 WHAT am I ?

Good Day GUITAR EUREKA Detectives!

You are given 10 clues to the identity of this mystery OBJECT. See how many clues you require to solve the case...have fun!

1. I was first made in 1952 with 1 speaker.

2. I acquired 3 additional speakers in 1955 to a total of 4 speakers.

3. My various incarnations includes the following circuit, 5D6 (1955), 5E6 (1955), 5E6-A (1955-1957), 5F6 (1957) and 5F6-A (1958-1960)

4. A unique feature of my circuit is the use of a cathode follower, which provides a slight compression of the sound while also allowing an increase in current, and thus more signal is sent to the power amp. It also had the secondary consequence of increasing the amp's dynamic.

5. Later versions consisted of a piggyback style head and 2x12" or 4x12" cabinet.

6. I was discontinued in 1983

7. I was reissued in 1990

8. Marshall based their first amplifiers on my design.

9. I am a tube amplifier originally designed for bass guitars

10. I am made by Fender.

I am ???????