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Premium AI Voice Guide
PROLiam's bench-side rundown of the Bose 901 Series IV.
Real-time streaming voice — specs, history, restoration pain points, market value.
Sonic Similarity Analysis
Both the Bose 901 and Ohm Walsh 2000 reject conventional forward-firing designs in favor of omnidirectional sound radiation that creates spacious, room-filling presentation. Each prioritizes overall ambience and naturalness over pinpoint imaging, making them ideal for casual listening where multiple listeners benefit from wide dispersion and minimal sweet-spot requirements.
Bose 901 Series IV
vs.
Ohm Walsh 2000
85 dB
Sensitivity
87 dB
4–4 Ω
Impedance
8–8 Ω
10–300W
Power Handling
30–200W
9-way
Driver Count
2-way
9x 4.5in full-range drivers (1 front, 8 rear)
Driver Config
8in Walsh driver, 8in powered subwoofer
Sealed
Enclosure
Sealed
Bookshelf
Size
Floorstander
35Hz – 17kHz
Frequency Response
38Hz – 20kHz
38 lbs
Weight
55 lbs
Vintage (used avg)
$600
Modern (new)
$2,800
Difference
$2,200more new
Cross-Match Engine · Pro
What pairs with this?
Reverse-match works both ways. Point us at a receiver and we surface compatible vintage speakers and turntables — matched on power, impedance, and era. Point us at a pair of speakers and we surface receivers with enough headroom to drive them cleanly. Available on Pro and Flipper Pro.
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