![]() In order to get the optimum sound output we recommend an amplifier with low impedance input. Imelod Contact Microphone Piezo Pickup Violin Microphone Pickup Cello Banjo Ukulele Mandolin Guitar Microphone Pickup. The pickup will operate with any preamplifier designed for piezo pickups. Piezo pickups and transducers have a very high output impedance. Shadow Electronics SH-951 Single Side Bridge Pickup for Upright Bass. mixers (and these vary considerably), if you are running straight into a P.A., then a P reamp/ DI may be necessary to boost line signal strength and lower the impedance so that the mixer receives a proper signal. Output is via a standard 1/4inch jack which attaches conveniently, descreetly and securely to the underside of the tailpice via a string keyhole slot Fitting instructions included The Kremona DB-1 is a passive pickup which will produce good results into most amplifiers designed for bass guitars or acoustic instruments. The pickup element simply pushes into a bridge slot and is held in place by interference fit/string tension. Stunning sound quality! The new Kremona DB-1 pickup is a professional quality passive piezo sensor for upright bass that offers stunning sound quality and ease of installation at a highly affordable price point. 4 Sensors that provide a natural sound both while bowing or plucking. KREMONA DB-1 PIEZO PICKUP FOR DOUBLE BASS Handmade in Bulgaria No modification to the instrument, no holes to drill. a 25V part is perfectly fine.ĥ) This particular preamp (an FET source follower) can handle quite a big signal without distorting, so it shouldn't be bothered by the fact that your pickup is "hot".Item: 391502401361 PICKUP TRANSDUCTEUR PIÉZOÉLECTRIQUE FAIT MAIN KREMONA DB POUR BASSE DROITE. Piezo pickups are often brighter and less warm than magnetic pickups, allowing for a high degree of string articulation and clarity in your tone. Doesn't matter if it's considerably more than 9V, i.e. It needs to be rated for well over 9 volts. The 0.5'' hole is then threaded using a 9/16' 12 tap. Next drill a 0.125'' hole right through the piece so the wire can extend out the back. The hole does not go all the way through the piece. This is the hole for a threaded end pin jack. The ultra-high 10 meg-ohm impedance is used to compensate for the harsh, quacky tone that some piezo pickups exhibit. The original value of 4.7uF is a bit stingy, and a 47uF cap is still very cheap. Drill a blind 0.5'' deep, centered in one end of the wood. ![]() (But be kind to your amp and speakers - plug in everything, keep the amp off, power up the preamp, wait a few seconds, then turn on the amp.)Ĥ) I increased the preamps power supply filter cap to 47uF. This will reduce thumps and bangs if you plug your preamp into the input of an amplifier that's already turned on. If you still have enough signal level with the added cap, you don't need to build a preamp at all!ģ) If adding a 4.7 nF cap kills signal too much, and you do build the preamp, it's important to add an additional resistor from output to ground (R4 in the schematic attached to this post). Im noticing the output seems to lack low frequencies. ![]() Lacking this, I can't tell you exactly how much the output will be reduced by adding the 100pF cap.Ģ) Since your pickup is already "hot", try connecting a 4.7 nF (same as 4700 pF) capacitor between pickup output and ground it will reduce the output signal, but it will also make the pickup compatible with a 1-megohm amplifier input impedance. 1 Hi all, Im using The Realist Copperhead piezo pickup on my upright bass. ![]() ![]() The good news is: there are lots of choices. Unfortunately, the manufacturer of your Copperhead does not seem to provide the one specification we need: the actual capacitance of the pickup. A Special 'Buyer's Guide' So, you've come looking for a pickup for your upright bass. Here's a cleaned up circuit, stripped of the stuff you don't need.ġ) If you add a 100pF cap across the input, it will reduce the output voltage from your piezo pickup. ![]()
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