This preamp is fully engineered, hand made and painted at an artisanal level in France by Thierry and Olivier Laval.
Here at LavalAudio, we know that every musician’s precious play time must be used to actually play music, instead of treating the headache given by complex gear setup. That’s the reason why we choosed to develop this plug and play preamp, which will give you the best sound, right after being plugged to your favorite instrument.
Output at instrument level, compatible with any other amplifier, effect pedal or sound card instrument input.
Full valve audio signal path (no transistor or integrated circuit), polypropylene capacitors and metal film resistors guarantee the user a very high sound quality, authentic, warm, natural and above all musical.
This pedal also acts like a buffer lowering the impedance your instrument pickups, which in turn allows you to use longer jack cables without any loss in terms of signal quality or high frequencies, especially when using it with passive pickups. If you already have an active guitar / bass the buffer effect is reduced since the instrument output is already low impedance, so this pedal will be less useful, even if your sound will still go through the all-tube double preamp stage, resulting in an improvement of your sound in a more subtle way.
Audio circuit is point to point wired, hand soldered with no printed circuit board.
Power supply is 9V and 12V compatible, filtering quality of your supply is irrelevant to sound quality or hum; the preamp is extremely silent thanks to an integrated power supply system.
12AU7 (or ECC82 equivalent) valve, with cover shield
Input impedance: about 1M Ohm
Output impedance: about 5k Ohm
Special Matching power supply (220V, EU) and quality patch jack included.
Power requirements: 9V – 32V direct current (DC), center negative.
9V – 0.5A
12V – 0.4A
A power supply delivering more intensity (like 1A or 2A) is perfectly fine and even recommended. It is advised to use a power supply of at least 12V, rated for 2A. It doesn’t need to have filtering or even to be audio-dedicated.
A blinking LED on your pedal indicates that your power supply is not powerful enough, don’t use it and seek another one.
Reverse polarity protection