www.radialeng.com True to the Music www.radialeng.com PZ-DI ™ Piezo Optimized Active Direct Box Radial Engineering Ltd. 1588 Kebet Way, Port Coquitlam BC V3C 5M5 tel: 604-942-1001 • fax: 604-942-1010 email: info@radialeng.com • www.radialeng.
® True to the Music PZ- D I ™ Piezo Optimized Active Direct Box TABLE OF CONTENTS PAGE Introduction ..............................................................................1 Input & output panel features ..................................................2 Overview & load adjustment ....................................................3 Powering the PZ-DI .................................................................4 Connecting the JPC...........................................................
® 1 True to the Music 2 3 4 5 6 7 8 9 10 11 12 13 INPUT PANEL OUTPUT PANEL 1. INPUT: ¼” hi-Z input used to connect the instrument to the PZ-DI. 8. 2. THRU: ¼” throughput used to feed an on-stage instrument amplifier. NO SLIP PAD: Provides electrical & mechanical isolation while keeping the PZ-DI from sliding around on busy stages. 9. 3. LOAD: 3-position switch lets you adjust the input impedance to optimize the load for the type of pickup being used.
® True to the Music OVERVIEW Upon first look, the Radial PZ-DI appears to be similar to most other direct boxes. This is true. You can use the PZ-DI just as you would a Radial J48 or one of our other direct boxes. Where it differs is that it has been optimized for use with piezo-electric pickups as these are the most problematic of all. A three position load switch lets you match the PZ-DI’s input with the type of pickup you are using.
® True to the Music POWERING UP Always make sure levels are turned off before making connections. This will help eliminate turn-on transients that can harm more sensitive components such as tweeters. You should also test at low volumes before turning up. The PZ-DI does not require a battery or power supply to make it work. It uses 48V phantom from the mixing console.
® True to the Music MAKING CONNECTIONS Connect the source instrument to the input using a standard ¼” instrument cable, set the appropriate load and connect the XLR output to your mixer using a standard mic cable. The PZ-DI will convert the high-impedance unbalanced signal to a balanced low impedance signal that will properly interface with the audio system. This will enable you to run long balanced cables without noise or signal loss. Radial Engineering Ltd.
® True to the Music USING AN AMPLIFIER If you are using an on-stage amplifier for personal monitoring, use the THRU to make this connection. This is basically a pass-through that takes the original signal and feeds it to your amp. Radial Engineering Ltd.
® True to the Music USING THE -15DB PAD As previously mentioned, the -15db PAD is used to reduce the PZ-DI’s input sensitivity. This lowers the signal level while also lowering the impedance to reduce susceptibility to noise. Most instruments do not produce enough output to overload the PZ-DI.
® True to the Music USING THE HI-CUT FILTER Another extra feature that is included on the PZ-DI is a high frequency filter. This is used to warm up the sound of the instrument by gently rolling off high frequencies above 3kHz while allowing lower frequencies to pass. The high-cut (low pass) filter is primarily used on buffered instruments such as acoustic guitars or violins that have a built-in preamp.
® True to the Music PZ-DI SPECIFICATIONS AND BLOCK DIAGRAM Circuit type:............................................... Proprietary analog circuit with low-noise FET op-amp Frequency Response: .............................. 20Hz ~ 20kHz Maximum input level: ................................ +10dBu THD+N: .................................................... 0.02% Dynamic range: ........................................ 105dB Equivalent input noise: ............................. -98dBu Maximum Gain: .........
RADIAL ENGINEERING LTD. (“Radial”) warrants this product to be free from defects in material and workmanship and will remedy any such defects free of charge according to the terms of this warranty. Radial will repair or replace (at its option) any defective component(s) of this product (excluding finish and wear and tear on components under normal use) for a period of three (3) years from the original date of purchase.
