Rolls HE18 User's Manual
Contents
1. INTRODUCTION Thank you for your purchase of the HE18 Buzz Off If you ve got hum or buzz in your audio signal the HE18 is the solution you need Almost all AC hum is caused by ground loops These ground loops act like radio antennae picking up hum and noise The HE18 removes many causes of noise by eliminating the ground potential INSPECTION 1 Unpack and Inspect the HE18 package Your HE18 was carefully packed at the factory in a protective carton Nonetheless be sure to examine the unit and the carton for any signs of damage that may have occurred during shipping If obvious physical damage is noticed contact the carrier immediately to make a damage claim We suggest saving the shipping carton and packing materials for safely transporting the unit in the future WARRANTY For information on the Rolls One Year Limited Warranty and to register this product visit our website at www rolls com DESCRIPTION INPUT S 2 ea 1 4 Tip Ring Sleeve jacks 2 ea RCA jacks OUTPUT S 2 ea 1 4 Tip Ring Sleeve jacks 2 ea RCA jacks DIAGRAM Max Out Bal 18 dB Unbal 12 dB Max In Bal 22 dB Unbal 22 dB Input Impedance RCA 10 k Ohm 1 4 10 k Ohm balanced Output Impedance RCA 10 k Ohm 1 4 10 k Ohm balanced THD 05 1 kHz Weight 1 Ibs 45 Kg Size 4 15 x 2 46 x 1 55 SCHEMATIC PHONE 1 4 T2. N JHL NI SGV J10 KOLO 1Nd1NO 431 SO T De a reer omo Oo 04 S522 g zOZUI 299923 z 29052 29 057 G nza gt p SFS08Tm Zo 0535356 z v3 Zso Seagate ao Ss se2ccam Q O o oo S gt 5 lt 3 lt 5030 l aof2O0R SFAGTG oos 2 SCOo 522 6 lt 39 0 550888 SooF e 2392220 _ x oO xOC9TBGoO oO a Y o c erzaS s5e __________ O85 5 org5 5T OO lt 5 0 2 SN o D co Qa S27 grg D P O E oO 2 Sen N maa 5 CO as C gt 3 v oz a2a o L N 50 a2a 90 C O D 3 2 lt 5 eh mh Q oP a 2Q97 CnN h Se O Pim as oO 5502 N Doaz N 22o To
3. R2 PHONE 1 4 a Az 3 i EZAN Roe PG XFMR AUDIO Ra PC INPUTS J5B 1 3 OUTPUTS PHONE 1 4 TRI il PHONE 1 4 J4 J2 XFMR AUDIO Rolls Corporation 5968 So 350 West Murray Utah 84107 HE18 BUZZ OFF Document Number HE18 SCH Date 12 May 2005 Sheet 1 of 1 OPERATION To insert the HE18 in a system with a buzz or hum discon nect the device you suspect is causing the noise Connect that device s Output to either of the Inputs 1 4 or RCA and connect the HE18 Output s to the next device in the signal chain For example if you ve got a buzz in your video system con nect the HE18 between the video unit and amplifier to isolate the signals PLEASE NOTE THE HE18 IS INTENDED TO RECEIVE LINE LEVEL Odb to 4 dB SIGNALS DO NOT CONNECT A MICROPHONE LEVEL SIGNAL OR A SPEAKER POW ERED LEVEL SIGNAL TO THIS UNIT CONNECTING A SPEAKER LEVEL SIGNAL ie THE OUTPUT OF A POWER AMPLIFIER WILL CAUSE PER MANENT DAMAGE TO THE HE18 pa 4 oes fl HE18 C D ROLLS MADE IN THE USA Removes buzz or hum R OUTPUT L caused by ground loops Requires no power Converts unbalanced signals to balanced LEFT LEFT INPUT OUTPUT q indino H LndLno 440 ANdNi Be 27ng I 8L3H Bl a 2 E F G 3 o o g 2 0O 9 ao 2225 ogzga ga o Seang ov 7506 Song srog mE 3 oaoa Q 2 Ss 3 oO 440 ZZNE 8L3H D a 3 2 S G T S N N o S z E 3 VS
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