B&K AV2500 Series II manual

B & K Components Ltd. P/N 12695[...]

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Page 1 Safety Precautions Page 2 Purpose and function Page 3 Design and constr uction Page 3 Features Page 4 Rear panel v iew Page 4 Rear panel descr iption Page 5 Control muti ng Pag e 5 - 6 Level contr ols Page 6 Inputs Page 7 Outputs Page 8 Internal bus Page 9 Jumper descripti on Page 9 - 10 Mono applic ation Page 11 Bridg ed applicati on Page 1[...]

Page 2 WA RNING: TO PREVENT FIRE OR SHOCK HA ZA RD, DO NOT EXPOSE THIS UNIT TO RA IN OR MOISTURE. The lightning fl ash with arr owhead, within an equil ateral tr iangle, is i ntended to alert the user of the presence of uninsul ated “dangerous voltage” within the product’ s enclosure that may be suffici ent magnitude to consti tute a risk of [...]

Page 3 The AV2500 series II is a compact, very efficient, five channel pow er ampli fier. It is designed to be used in al l types of audio or audi o/video sy stems. The term versatile is almost adequate to descri be the vari ance of operational modes the AV2500 series II is capable of providi ng. This i s all accompli shed through the si mple place[...]

Page 4 - Efficient high curr ent transformer for improved dy namics. - More accur ate and three dimensional r eproduction of source material. - Prov ides short term pr otection from accidental shorti ng of output devic es and protection from thermal over load. - Improv e connections for better sound and mi nimiz ed signal loss and degradati on. - L[...]

Page 5 1. A C fuse holder - Holds the AC Line fuse. This fuse is an 8 Amp / 250 Volt Slow Bl ow fuse. Replace w ith same ty pe and val ue fuse only. 2. A C Input receptacle - For attaching the suppl ied AC pow er cord to the amp lifier. 3. Speaker outputs - For connecting the speaker s to the amplifier. Ex plained further on page 8. 4. A mplifier c[...]

Page 6 If the control function is desired, each uni t in the system must r emain connected at all times and the control must be enabled. To enabl e the control function, the CTRL ENABLE button must be out for each controllabl e amplifier in the sy stem. For more information on the amplifiers output status under vari ous control conditions, r efer t[...]

Page 7 Example: W hen using 4 ohm and 8 ohm speakers together, the 4 ohm may sound louder then 8 ohm at a g iven v olume level. The l evel contr ols on the ampli fier are used to match the speakers volume level. Clockwise w ill increase the output. Counter clockwise will decrease the outp u t. RCA ty pe connectors accept line i nput from the preamp[...]

Page 8 Five w ay binding posts ar e provi ded. One pair for each channel. They are desig ned to accept a banana-type pl ug or spade l ug connector (s hown below ) and are color coded for easy identificati on. The red (+) post should alw ays be connected to the speaker s (+) jack. The black (-) post should always be connected to the speakers (-) jac[...]

Page 9 In order to g ain access to the internal bus str ucture, you must firs t remove the top cover . Turn the amplifier so the rear panel is facing y our. The jumper modules may be seen on the circuit boar d just behind the lev el controls . Below i s the default setup for the AV2500 series II amplifier. By arr anging the jumpers allow s you to c[...]

Page 10 W ith the jumper plug set to this locati on on a channels jumper module w ill only l et the signal pr esent at that channel’s input to appear at it output. Along w ith being channel 2's input, it i s used as the input to the rig ht bus and the right sour ce for the ‘L+R BUS’ . Because it is a BUS i nput, any signal input here w i[...]

Page 11 The AV2500 series II ’ s five output channels may be parall eled (mono) to combine the output current for all channel s. This feature allow s the amplifier to i ncrease its apparent output current. To use, pl ace the source gr oup jumper for all channels on the ‘L BUS’ jumper terminal. Place the v olume gr oup jumper for all channel s[...]

Page 12 The AV2500 series II may operate w ith 2 channels br idged to dri ve a hig h impedance speaker. To use, place the source g roup jumper for both channels on the ‘ L BUS’ jumper terminal . Place the vol ume group jumper for both channels on the ‘NO VOL’ jumper termi nal. Place the inv ert j umper module on the ‘- L’ terminal . One[...]

Page 13 There will most like ly be a n umbe r of cable s in volved in the installatio n of your ho m e entertainment sy stem. Pre-planni ng is essenti al in order to max imiz e system efficiency . W e recommend the follow ing as a means of helpi ng y ou reach that goal :  Make a diagr am of your proposed sy stem by l aying out the relativ e loca[...]

Page 14  Connect the wi res from your speakers to the appropri ate output on the amplifier. It is absolutely essential that y ou observ e correct polar ity i n these connections.  Double check all connecti ons.  Plug the ampli fier’s pow er cord into the AC pow er source. Turn the amplifier’s power sw itch ‘on’. The panel light sho[...]

Page 15 PROBLEM POSSIBLE CA USE POSSIBLE SOL UTION No sound 1. Power cord not plugged in. 1. Reconnect power cord. (‘on’ LED not illuminated) 2. Power off at AC source. 2. Check AC switch or fuse. 3. AC power inlet fuse blown 3. Check for shorts or or faulty. overloading. 4. Control switch in the wrong 4. Place control switch in position. prope[...]

Page 16 Power rating: 8 ohms 60 watts @ 1 kHz 4 ohms Not recommended Frequency response 5 Hz - 45 kHz Input sensitiv ity 0.77 Volts THD (S+ N) 0.09 % @ 1 kHz Input impedance 33.2 k ohms Damp in g fa ctor 80 Current ( peak to peak) 16 Amps Slew r ate 14 V / ) sec Dynami c headroom 1.0 dB S/N (A- weig hted) 95 dB Voltage g ain 28 Line vol tage 120/22[...]

Page 17 B&K Components Ltd., referred to herein as B&K, warrant s your B&K equipment against all defects in material and workmanship for a period of five years from the date of purchase. This warranty applies only to t he original purchaser and only to equipm ent in normal residential use and service. Defective equipment must be returne[...]

B&K Com ponents, Lt d. 2100 O l d Union Road Buf f al o, New York 14227 716-656- 0023 www. bkc omp. co m[...]