![]() ![]() In this case, the owner requested an upgrade to TI precision low-noise op-amps which offer much improved performance over the originals, along with the standard capacitor overhaul and performance verification.Īll set! This Active Equalizer sounds fantastic and works perfectly, just like it should. Interestingly, this one also came from the factory with sockets for the op-amp chips, and the same National LF353 op-amps which were the subject of a January 1983 service bulletin recommending their replacement. This unit was originally used on 220V in Europe, but was converted to U.S. Inside were a different style of capacitors with European markings:Īnd finally, the power supply links had been added: For one, the voltage marking was covered in residue. The unit provides the BOSE 901 specific equalizer curves with four tone modes that accommodate a wide range of room conditions and recording. Domestic Shipments The EQ901 Elite is an ultra high performance replacement for existing BOSE 901 Series I/II, III/IV or V/VI equalizers (select your series when ordering). Do Bose 901 Speakers Need an Equalizer (This is What the Experts Say) Written by Phanesmu in Uncategorized Have you ever wondered whether the Bose 901 speakers need the equalizer to perform optimally This article will discuss what an equalizer does and how you can use it to improve your Bose 901 speakers. There were a couple of things which were interesting about this particular Active Equalizer. In Stock Same Business Day Shipping Expedited Shipping (1 to 3 days) for U.S. This Bose® 901 Series IV Active Equalizer, serial #501554, came into the shop with the owner reporting that it loses output on one channel and the sound degrades the longer it is powered on. Definitely time for an overhaul! ![]()
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