The forum posts I saw also fail to distinguish between Bose engineers and Bose retail store salespersons as the source for the claim that the VI and VII ver 2 were the same. There are even reports that Bose themselves reported that there was no difference between VI and VII ver 2, although the internet discussion does talk about subtle differences.
#Bose 901 equalizer series
Third, there's a lot of misinformation on the 'net about there being no difference in sound quality beyond the Series V other than cosmetics.
#Bose 901 equalizer software
I did really enjoy the original when using advanced software EQ, and there's a possibility that I just need to restore my '68 Edition equalizer.
#Bose 901 equalizer driver
Advances in the full-range speaker driver also provide a cleaner frequency response, so the "sealed" original design is not inherently better. The newer models provide deeper bass whether you use a tube or solid state amplifier. Second, there is misinformation about the original, sealed Bose 901's (Series I and II) offering better bass provided that you had enough amplification power and it was simply that the 901 came to market when tubes were still common. Maybe people assumed the Acoustimass 5 cubes reflected the sound of the Bose 901. Maybe people assumed the equalizer offered a simple smiley face EQ boost and assumed that the speaker without the equalizer was the truest response. No matter which equalizer unit I used, the drums were more convincing on the original Made-in-Canada Series VI while in complex passages, the vocals were slightly cleaner with the Made-in-Mexico Series VI ver 2.įirst, these measurements suggest that the phrase: "No highs, No lows, must be Bose" does not apply to the Bose 901 when used with the Active Equalizer. Swapping the equalizer units didn't change the sound beyond the different frequency response curve. You can also see how an un-corrected JBL 708P has a big dip in the bass (from the room) whereas the reverberations of the 901 help to fill that out (with the trade-off of comb filtering). Running the JBL 708P in roughly the same position as the Bose 901's shows that the Series VI ver 2 more closely matches the the 708P's bass. This difference in clarity is relatively subtle, but difference in bass extension is not subtle at all! I didn't measure IMD, but my impression is that the Series VI ver 2 has improved IMD in that vocals are similarly good between both speakers when it's someone singing with minimal background music whereas the ver 2 has greater clarity of the vocals when there is a complex band playing as well. The midrange/vocals do seem to be a bit cleaner with ver 2, but the reduced bass is noticeable.
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