L l e e e e d d s s p p r r o o a a u u d d i i o o h h i i z z p p r r e e a a c c o o u u s s t t i i c c i i n n s s t t r r u u m m e e n n t t t t u u b b e e p p r r e e a a m m p p - - e e q q - - a a c c t t i i v v e e d d . . I i . . User’s manual.
L l e e e e d d s s p p r r o o a a u u d d i i o o h h i i z z p p r r e e a a c c o o u u s s t t i i c c i i n n s s t t r r u u m m e e n n t t t t u u b b e e p p r r e e a a m m p p - - e e q q - - a a c c t t i i v v e e d d . . I i . . User’s manual revision 1 2009, leeds technology llc al...
Hiz pre limited warranty leeds pro audio warrants this product to be free of defects in material and workmanship for a period of three year from date of original retail purchase. This warranty is enforceable only by the registered owner of the product identified by the product serial number. To be p...
___________table of contents 1 overview 1.1 introduction 4 1.2 features 5 2 controls & connections 2.1 front panel 6 2.2 back panel 7 2.3 connection diagram 8 3 operation 3.1 overview 9 3.2 instrument input 9 3.3 clip indicator 9 3.4 equalizer 9 3.5 output level 10 3.6 vacuum tubes 10 3.7 power supp...
1. Overview________________ 1.1 introduction thank you for purchasing the hiz pre acoustic instrument tube preamp - eq - active d.I. The hiz pre is a vacuum tube driven active direct box with a superb equalizer to craft your sound. The ultra high input impedance preserves the full bandwidth and bass...
____________________overview 1.2 features the following is a summary of your hiz pre features: ultra-high input impedance input stage the ultra high input impedance provides a very low noise floor and preserves the full bandwidth and bass response of a piezo element pick up. 12ax7 vacuum tube for wa...
2. Controls & connections 2.1 front panel hi z input – high impedance input matched to piezo electric elements such as under saddle and soundboard transducers. Bass – sets low frequency shelving equalizer gain to +/- 20db. Treble – sets high frequency shelving equalizer gain to +/- 20db. Clip – moni...
_____controls & connections 2.1 rear panel unbalanced output – buffered ¼ inch output to drive a monitor or stage amplifier. The buffer allows both the 1/4 and xlr outputs to be used simultaneously without loading down the output stage of the hiz pre. Cable wiring: tip signal (+) sleeve ground (-) b...
Controls & connections_____ 2.3 connection diagram __________________ ______________________ 8 hiz input xlr balanced output ¼” un- balanced output hiz pre a a c c o o u u s s t t i i c c i i n n s s t t r r u u m m e e n n t t tube preamp - eq - active d.I. Mixer / console amplifier power supply gu...
3. Operation_______________ 3.1 overview in summary, ensure you do not overdrive the hiz pre input. Eq and maximize the hiz pre volume while minimizing the input level on the mixer, console, or amplifier. 3.2 instrument input the instrument input is designed to accommodate a ¼” tip and sleeve plug f...
Operation____________________ 3.5 output level for ideal signal-to-noise ratio (clean signal with lowest noise), it is recommended that the output level of the hiz pre is set as high as possible without overdriving the mixer, console, or amplifier while keeping the input level on the mixer, console,...
____________________operation 6. Carefully slide the front panel / top cover forward away from the rear chassis. 7. Gently remove the vacuum tube. Care should be taken to properly align the pins on the tube to the corresponding holes in the receptacle. Make sure the tube is completely seated in the ...
Operation____________________ 3.8 mounting instructions the hiz pre can be rack mounted, or operated as a stand- alone unit. Stand-alone use: the hiz pre comes with (4) rubber shock mount vibration dampers or “feet”. Please attach the rubber feet to the bottom side of the hiz pre when using in a sta...
4. Technical________________ 4.1 audio specifications bandwidth 30–18k hz +/- 1db dynamic range 80 db thd (-10dbu, 1khz input) noise floor -75 dbµ 4.2 input specifications impedance, unbalanced ¼” ts 10 mΩ peak input level -10 dbµ 4.3 output specifications impedance,balanced xlr 100 Ω output level,b...
5. Miscellaneous___________ 5.1 information please record information for your hiz pre for future reference. Model name / number: ___________________________ serial number: _________________________________ date of purchase: _______________________________ place of purchase: ________________________...
