Short answer: the Klipsch Forte IV. It ranks #101 of 188 floorstanding speakers by sound quality (rated 4.0/5) at $5,499.98 and is still sold new; the Bose 901 Series V ranks #187 (rated 1.9/5) and is discontinued, so it is only an option used.
The Klipsch Forte IV is the more accurate choice. Three-way heritage design: a 1” titanium tweeter and 1.75” compression driver for the midrange mated to a 12” woofer, plus a 15” passive radiator for extra bass reinforcement. Its measured preference score, a predictor of how neutral it sounds, is 3.78 against 0.43 for the Bose 901 Series V. Watch for: Contrary to the classic Klipsch reputation for being forward and bright, this model is actually somewhat recessed in the 1.5-4kHz “presence” region, which can make some tracks sound dull or lacking in detail.
The Bose 901 Series V is the deeper-bass pick. Historically distinctive direct/reflecting architecture uses eight rear-firing and one front-firing full-range drivers to create a very large, room-filling presentation. Its bass reaches about 55.8Hz before falling 3dB, against 82Hz for the Klipsch Forte IV. The tradeoff: Even with the required EQ, Erin measured only about 81dB sensitivity, grossly non-flat response, numerous impedance/resonance irregularities and very high distortion.
Buy the Klipsch Forte IV. It is rated higher for sound quality and still sold new, while the Bose 901 Series V is discontinued.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| Klipsch Forte IV | Bose 901 Series V | |
|---|---|---|
| Price | $5,499.98 per pair | Discontinued |
| Ranked | #101 of 188 in Large Size Floorstanding Speakers | #187 of 188 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 39Hz (measured, Erin’s Audio Corner) | 34.5Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 82Hz (measured, Erin’s Audio Corner) | 55.8Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 93.8dB (measured average, Erin’s Audio Corner; manufacturer rates 99dB in-room / ~94dB anechoic) | Approximately 81dB/2.83V/1m with tested EQ setting (measured, Erin’s Audio Corner) |
| Drivers | 1x 12” (305mm) fiber-composite woofer + 15” passive radiator, 1x 1.75” compression driver midrange on horn, 1x 1” titanium compression tweeter on horn | Nine full-range drivers: eight rear-firing, one front-firing |
| Weight | 117.3 lbs (53.2 kg) | 35.3 lbs (16 kg) each |
| Woofer Cabinet | passive radiator | - |
| Impedance | 8 ohms | 6.2 ohms minimum (measured, Erin’s Audio Corner) |
| Dimensions | 36”H x 16.5”W x 13”D (914.4 x 419.1 x 330.2 mm) | 21”H x 21”W x 12.6”D (533.4 x 533.4 x 320.7 mm) |
| Spinorama Preference Score | 3.78 | 0.43 |
| Spinorama Preference Score with Perfect Sub | 5.72 | 2.11 |
| DIY Kit | No | No |
| Bass Extension | - | Strongly dependent on supplied active equalizer and room (measured, Erin’s Audio Corner) |
| DSP | - | External analog active equalizer required |
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The Two Speakers In Full
Klipsch Forte IV: $5,499.98 per pair Amazon Crutchfield eBay
Same family: the Klipsch Heresy IV (smaller floorstanding, ranked lower, rated 2.3/5), the Klipsch Cornwall IV (larger floorstanding, ranked lower, estimated 2.8/5), the Klipsch La Scala AL6 (larger floorstanding, ranked lower, estimated 2.8/5) and the Klipsch Klipschorn AK7 (larger floorstanding, ranked lower, estimated 3/5).
Pros: Three-way heritage design: a 1” titanium tweeter and 1.75” compression driver for the midrange mated to a 12” woofer, plus a 15” passive radiator for extra bass reinforcement. Genuinely resonance-free cabinet, a clear improvement over the notably boomy, resonant Klipsch Heresy IV in the same lineup. Surprisingly wide, expansive soundstage that beat both the Klipsch Heresy IV and a KEF LS50 Wireless 2 in direct comparison: images occasionally appeared several feet outside the physical speaker location. Deeper bass extension than the Klipsch Heresy IV (F3 of 82Hz, about 10Hz lower). Distortion measures well below 1% at 86dB and stays mostly within 1% even at 96dB. Comes as a factory-matched serial-numbered pair, backed by an unusually generous 10-year warranty. Mostly above 4 ohms impedance, so it’s compatible with AVRs, solid-state, or tube amplifiers. More neutral overall than other Klipsch models the reviewer has tested, making it a reasonable pick for listeners who already like the “Klipsch sound” but want something more balanced. Measured bass extension of 82Hz (-3dB), with a measured sensitivity of 93.8dB.
Cons: Contrary to the classic Klipsch reputation for being forward and bright, this model is actually somewhat recessed in the 1.5-4kHz “presence” region, which can make some tracks sound dull or lacking in detail. A peak around 6kHz reads as sibilant and “painful” when seated exactly on the tweeter axis; sitting a bit above that axis reduces it somewhat. Klipsch’s marketed 99dB sensitivity figure is an in-room rating that assumes 3-6dB of boundary gain: anechoic sensitivity measures closer to 94dB, which the manufacturer does disclose but can still mislead buyers comparing spec sheets. Radiation width isn’t consistent across all frequencies: a noticeable notch around 2-3kHz interrupts otherwise wide dispersion, which can cause a fundamental tone and its harmonics to image in slightly different places in the soundstage. Uses shallow low-pass crossover slopes (despite Klipsch’s steep-crossover marketing, which applies only to the high-pass side), likely contributing to some of the measured dips and possible cone-breakup artifacts. Some compression shows up around the midrange crossover point at very high output (102dB), though likely only audible at extreme volumes. At around $5500/pair, a significant investment, and still needs a subwoofer for material extending below about 50Hz.
Full Klipsch Forte IV review and specifications →
| Bass Extension (-10dB) | 39Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 82Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 36”H x 16.5”W x 13”D (914.4 x 419.1 x 330.2 mm) |
| Drivers | 1x 12” (305mm) fiber-composite woofer + 15” passive radiator, 1x 1.75” compression driver midrange on horn, 1x 1” titanium compression tweeter on horn |
| Impedance | 8 ohms |
| Sensitivity | 93.8dB (measured average, Erin’s Audio Corner; manufacturer rates 99dB in-room / ~94dB anechoic) |
| Spinorama Preference Score | 3.78 |
| Spinorama Preference Score with Perfect Sub | 5.72 |
| Weight | 117.3 lbs (53.2 kg) |
| Woofer Cabinet | passive radiator |
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Bose 901 Series V Discontinued eBay
Pros: Historically distinctive direct/reflecting architecture uses eight rear-firing and one front-firing full-range drivers to create a very large, room-filling presentation. Erin measured a benign 6.2-ohm minimum impedance, so the raw electrical load is easier than many modern four-ohm speakers. The supplied active equalizer offers user-adjustable tonal balance and is integral to obtaining usable bandwidth. Measured bass extension of 55.8Hz (-3dB), with a measured sensitivity of 81dB.
Cons: Even with the required EQ, Erin measured only about 81dB sensitivity, grossly non-flat response, numerous impedance/resonance irregularities and very high distortion. Output above roughly 90-95dB at his seat became audibly poor; multitone testing reached only about 98dB before the distortion limit. The reflection-dominant radiation prevents precise imaging and makes results strongly room-dependent. It requires the proprietary equalizer and substantial amplifier power despite its benign impedance. Discontinued.
Full Bose 901 Series V review and specifications →
| Bass Extension | Strongly dependent on supplied active equalizer and room (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-10dB) | 34.5Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 55.8Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| DSP | External analog active equalizer required |
| Dimensions | 21”H x 21”W x 12.6”D (533.4 x 533.4 x 320.7 mm) |
| Drivers | Nine full-range drivers: eight rear-firing, one front-firing |
| Impedance | 6.2 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | Approximately 81dB/2.83V/1m with tested EQ setting (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 0.43 |
| Spinorama Preference Score with Perfect Sub | 2.11 |
| Weight | 35.3 lbs (16 kg) each |
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