noobaslt Posted September 26, 2007 Report Share Posted September 26, 2007 hi all now friend just got super old amp its pioneer a-88x it has 4 chalnel outpout now i want to ask is it possible to one chanel be only for sub only ?? is there any low pass filters?? or something? sorry about messy english thx Link to comment Share on other sites More sharing options...
MickyMcD Posted September 28, 2007 Report Share Posted September 28, 2007 For most amplifiers of that era, it is a simple pre-amp through power amp design. Most do not have complex equalisation (only having bass and treble) and nearly all do not have any form of crossover or infrasonic/high frequency filters (The A-88x does have a 15Hz subsonic filter). To run a woofer of the amplifier, use one channel and use a Passive Crossover to split the signal from the source (CD player, computer etc) into high and low bands, then feed the low into the amp. Alternatively, some have only a sub output, so use that and feed into a single channel of the amp. Most amplifiers of this era and design, in fact almost all, do not have the ability to run bridged. So I am afraid you must use one channel per woofer/coil. However, the A-88X does have the ability to drive low impedances such as two ohms per channel with no fault, as it uses seperate power supplies for each channel. I reccommend you read this article http://www.elitestereo.netfirms.com/a88x.htm as it contains a hefty amount of information on the A-88X. Cheers, Mick Work;DiGiCo D1 Live / MIDAS Heratige 1000 / MIDAS VeniceMeyer Sound CQ-1's, CQ-2's, PSW-2'sRAMSA Monitor AmplifiersP.Audio MonitorsBSS OMNIDRIVE and SoundwebDBX 231 and Klark Teknik DN360 EQ'sRCF TT22ARCF ART320 Link to comment Share on other sites More sharing options...
noobaslt Posted September 28, 2007 Author Report Share Posted September 28, 2007 ok thx man Link to comment Share on other sites More sharing options...
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