Ifyouprefertouseothermethodsofconnection,u nscrewtheinsulated,hexagonalheadof thebindingpostuntiltheholeinthebindingpost studisaccessible.Youcantheninsertthe bareortinnedwire,orterminalpin,throughtheh ole.Youcanalsousethemanyvarietiesof spadelugsavailablebysimplyplacingthetinesof thespadelugontothebindingpoststud. Turntheinsulatedhexheadofthebindingpostclo ckwiseuntilthewireorconnectorisfirmly secured.Fingerpressureissufficientandyoushou ldnotusepliers,orothertools,which could damage or overtighten the binding post assem bly. The binding post has been
designedinsuchawaythatfingerpressureisall thatisneededtocausea"pinching"action amongthedifferentmetalsurfacestoinsureproper connection.
Allloudspeakersystemshavinganominalimpedance | downto2ohmscanbeconnectedto, | ||
anddrivenby,theGFA555ms.TheGFA555mscandri |
| vetheselowimpedancesatmore | |
thanadequatepowerlevelswithnodifficulty.Its | houldbenotedherethatmanyloudspeaker | ||
systemswhicharerated,nominally,at4ohmsdrop | inimpedance,insomepartsoftheir | ||
frequencyrange,toaslowas2ohms(andsomeothe |
| rstoevenlessthan2ohms).Youwill | |
notexperiencedifficultiesevenwiththeseverylo | wimpedanceloads. | ||
In mostapplications,youcandrivetwoormoreset | s ofloudspeakers. Youshouldnote, | ||
however,thatwhenloudspeakersareparalleled,the | impedancepresentedtotheamplifieris | ||
lowerthanthenominalimpedanceofeachloudspeake |
| r.Inotherwords,ifyouparalleltwo | |
8ohmsetsofloudspeakers,theresultantimpedance | willbe4ohms.Ifyouparalleltwosets | ||
of4ohmimpedanceloudspeakers,theresultantimpe |
| danceoftheloadwillbe2ohms.If | |
8ohmand4ohmloudspeakersareparalleled,there |
| sultantimpedancewillbeabout2.6 | |
ohms. In these last two situations, and depending o | n the lowest impedance of the | ||
nominally4ohmspeakers,andwhenmakingexcessive |
| powerdemandsfromtheamplifier, | |
youmaytriggertheTHERMALPROTECTIONontheampli | fierorblowoneoftheDCRAIL | ||
FUSES.Seetheirrespectivesectionsformoreinfor | mation.Inthoseveryrareinstancesin | ||
whichyourparticularapplicationcausesfrequenta | ctivationoftheTHERMALPROTECTION | ||
e circuitry, you might consider use of an auxiliary |
| fan to increase amplifier cooling. | |
Alternatively, and for convenientswitching of mult | iple sets of speakers with impedance | ||
protectionfortheamplifier,youmayconsiderthe | useofanADCOMspeakerselector.These | ||
areavailablefromyourADCOMdealer. |
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Shouldyou wishtoverifythatyourloudspeakers ar | einphase,onceconnections tothe | ||
amplifier have been made, play a recording of solo | voice with singleinstrument | ||
accompaniment,atnormalvolume,withthepreamplif | ier'smodeswitchinthemonoorA+B | ||
position.Standaboutthreefeetinfrontofthelo | udspeakersandexactlybetweenthem.If | ||
your loudspeakers are inphase, the voice and accom |
| panying instrument will appear to | |
