Bose freespace 51 replacement speaker series#
Speaker is always across one or more windings ( in parallel), never in series with any of them.Īs of : getting 4 -8 ohm impedance instead of almost unusable 1 ohm.
Justīe sure to connect both the speakers and the module directly to the amplifier, using separateĬhannels or connect speakers that do not need equalization in parallel with the Acoustimass module To be able to say this in advance one would need the circuit diagram (schematic) of the passive high pass in the bass unit from Freespace 3 Series II - go to Acoustimass Bassmodul Series II | Bose Professionalĭon't mention exact values for the satellite speaker impedance: You can use the FreeSpace®3 System Series II Acoustimass® module with other Bose® speakers, suchĪs the FreeSpace Model 16, Model 32, Model 32SE, Panaray® 302TM, or FreeSpace 6 speakers. close enough to typical speakers with impedance of 4 ohms.
Bose freespace 51 replacement speaker serial#
When such transformers available as a single part for reasonable costs, it would be an easy task to change it in all speaker devices to get 8 ohms and avoid to purchase amp with 100V outputs.Īn other possibility is a use of the pins "C" and "32" - this DC-resistance together with the driver is 1R7 and serial connection of two speaker devices is 3R4 - i. It can therefore be assumed that Bose uses this 0.8 ohm chassis in all versions of this model - even in the version with 8 ohms together with a suited auto transformer in this kind but for 8 ohms input. In the attachment the images of transformer with removed connection terminals and partially cut off leads of some winding so as of the steps of the assembly procedure.įirst image shows the schematic of the 100V transformer.Īccording this it is clearly an auto transformer, i. BOSE Model 32 100 VRMS - Auto-Transformer Schematic here
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