#pre-amp

AXE - BPA-1 - BUFFER PRE-AMP

ARTISTS X-PONENT ENGENEERING

"ARTISTS X-PONENT ENGINEERING was a company based out of Menlo Park, California. It seems that the BPA-1 Buffer Pre-Amp was the first of 3 plug-in effects produced by AXE (at least from what the 1982 catalogue would indicate). Here's what said manual/catalogue tells us: -Super boost your signal up to 20 dB -Adds punch and highs lost when using effects devices -Direct instrument plug-in eliminates cord loading -Signal is ALWAYS buffered at all gains -Battery life in excess of 1000 hours AXE's Buffer Pre-Amp eliminates the loss of signal level and punch when using effects devices or driving long cords. But, unlike other preamps, AXE's Buffer section is ALWAYS in the circuit removing the effects of loading. The unit's switchable, variable gain can increase you instrument's output 10X. There are many floor-box style preamplifiers available, all with one glaring design fault: they are on the floor!!! The loading effects caused by the instrument's cord can not be resolved from this location. AXE's Buffer Pre-Amp is where it should be: in the instrument. But the REAL PLUS is that it makes a terrific, AFFORDABLE DIRECT BOX for ANY instrument. It is capable of driving up to 1000 ft. of cable without loss of signal level or highs. Every instrument with a pick-up or transducer -- guitar, bass, or keyboard -- will benefit from the use of AXE's Buffer Pre-Amp SPECIFICATIONS Bandwidth: 20Hz to 20 kHz, plus or minus 0.5dB (any gain) Maximum Output: +7 dBV THD+N: Less than 0.08% (any gain) Gain: 0 to 20 dB (variable) Equivalent Input Noise: -106 dBm (20kHz BW) Maximum Input Signal: 2.3 V (+9dBm) Input Impedance: 5 ohms"

AMZFX - PRE-AMP

"This is a dual op amp booster that was the predecessor to the dual op amp pcb that I sell on my site. I'm not sure how old it is but it pre-dates the internet! I used this pedal sometimes when playing live. A tap of the footswitch toggles between the two channels that can be set for different gains. The enclosure is a folded sheet-metal aluminum box that was widely available. It is a little large compared to modern pedal builds. The power supply jack is a 3.5mm phone jack style socket, such as was used on the original Rat pedals. The bypass is a soft-touch electronic switch circuit using a cmos chip. This was before microprocessors became very small and cheap, but cd4066 cmos switches cost pennies and were available everywhere."

Hofner - PRE-AMP

"... isn’t really a pedal at all, but it’s plays a very significant part in early electric guitar! This is a Hofner Pre-Amp, made in England during the 1950’s. If you were a beginner guitarist and couldn’t afford one of those new and expensive guitar amplifiers, the Hofner Pre-Amp is there to convert your (tube) Hifi Receiver or Radio console into your very own guitar amp! Just plug the banana clips into the “Phono” input and flip the switch 💥 Utilizing a Mullard OC71 germanium transistor and a very simple boost circuit, it’s no surprise that the 1960’s Dallas Rangemaster circuit is very eerily similar to that of the Hofner Pre-Amp."

L.R. Baggs - Pre-Amp Equalizer