Klipsch Heresy IV vs MoFi SourcePoint 888

Last updated: August 25, 2026

Short answer: the MoFi SourcePoint 888 for better sound quality, the Klipsch Heresy IV for the lower price. The MoFi SourcePoint 888 ranks #4 of 71 floorstanding speakers at $5500. The Klipsch Heresy IV ranks #44 at $3198, $2302 cheaper.

What the Klipsch Heresy IV offers: Very high 94.5dB/2.83V/1m sensitivity in Erin’s anechoic measurement—well below Klipsch’s 99dB in-room claim, but still excellent—and strong short-term output from a 12-inch woofer plus horn-loaded midrange and tweeter. The compact, furniture-grade Heritage cabinet is easier to place than most high-efficiency designs, and dynamics at moderate levels can sound lively. A stable four-ohm-capable amplifier can produce substantial SPL with relatively little voltage. Watch for: Erin measured a 77Hz F3 and response rolling away near 100Hz in-room, so a subwoofer is required for modern full-range reproduction. The impedance dips to about 4 ohms, reducing the practical amplifier advantage implied by its sensitivity. Pronounced directivity mismatch at the driver transitions, impedance/response resonances and elevated distortion spikes around the crossover remain audible concerns that EQ cannot fully solve. At 102dB Erin measured roughly 1.5dB midband compression; at 96dB distortion rises around crossover. Performance is difficult to justify at the price, and Erin explicitly did not recommend it.

What the MoFi SourcePoint 888 offers: Three-way vented design: an 8” coaxial mid-range/1.25” dome tweeter driver plus two additional 8” woofers crossed at about 130Hz, giving genuinely full-range output (F3 34Hz, F10 26Hz) other than the deepest subsonic content. Ranked by the reviewer among his personal top three speakers out of roughly 200 tested, alongside the KEF Blade 2 Meta and Dutch & Dutch 8C, despite costing a small fraction of either. Excellent compression/dynamic-range linearity, holding its own against much pricier speakers like the March Audio Sointuva AWG, KEF Reference 1 Meta, and KEF Blade 2 Meta. On-axis (0°) and 30°-off-axis estimated in-room responses track within about 1-1.5dB of each other above 500Hz, so tonal balance barely changes with placement or listening angle - excellent for multi-seat home theater or entertaining. Wide horizontal dispersion of about ±60°. Distortion stays low: under 1% at 86dB, and under 1% above 200Hz even at 96dB, with multitone distortion mostly under 1% as well. Not a difficult amplifier load (5-ohm minimum impedance, 4.2-ohm minimum EPDR). Checks the three boxes the reviewer considers essential for a home theater speaker: low compression, low distortion, and excellent directivity. Watch for: A significant investment, best ordered from a dealer with a good return policy. Large and heavy floorstander (about 96 lbs, 42” tall) requiring real floor space and rear clearance. Positioning is fairly specific: needs about 2 feet from the rear wall - closer causes boominess in the 40-50Hz region, farther loses bass extension. Vertical dispersion (about ±50°) is narrower than horizontal (about ±60°), since the two 8” woofers are spaced vertically apart on a tower cabinet, causing some vertical mismatch at lower frequencies. A small on-axis dip around 500Hz and a deliberately lower tweeter level (about 0.5dB below the midrange) are intentional design choices for smoother in-room response, but mean the raw on-axis measurement isn’t perfectly flat. A mild diffraction-related dip appears around 3kHz in directivity measurements. Toeing the speaker out more than about 10° starts to noticeably reduce top-end energy.

Buy the Klipsch Heresy IV if the price matters more than sound quality. Buy the MoFi SourcePoint 888 if sound quality matters more than the price.

Buy the MoFi SourcePoint 888 at Crutchfield →Buy the Klipsch Heresy IV at Amazon ($3,198/pair) →

Klipsch Heresy IV vs MoFi SourcePoint 888

Specifications Side By Side

Klipsch Heresy IV MoFi SourcePoint 888
Price$3,198/pair$5500
Ranked#44 of 71 in Large Size Floorstanding Speakers#4 of 71 in Large Size Floorstanding Speakers
Bass Extension (-3dB)77Hz (measured, Erin’s Audio Corner)34Hz (measured, Erin’s Audio Corner)
Bass Extension (-10dB)50.0Hz (measured, Erin’s Audio Corner)26Hz (measured, Erin’s Audio Corner)
Sensitivity94.5dB/2.83V/1m (measured, Erin’s Audio Corner)85.6dB (measured, Erin’s Audio Corner)
ImpedanceApproximately 4 ohms minimum (measured, Erin’s Audio Corner)6 ohms nominal, 5 ohms minimum (measured, Erin’s Audio Corner)
Drivers1" horn-loaded tweeter; 1.75" horn-loaded midrange; 12" wooferDual 8" paper cone woofers, 8" Paper Cone midrange, 1.25" wide roll soft dome tweeter
Dimensions24.8"H x 15.6"W x 13.3"D41.2"H x 12.6"W x 16.1"D (1046.5 x 320 x 408.9 mm)
Weight45 lb each94.8 lbs / 43 kg each
Woofer Cabinetported, rearported, rear
Buy the MoFi SourcePoint 888 at Crutchfield →Buy the Klipsch Heresy IV at Amazon ($3,198/pair) →

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Prices on this page were last checked August 25, 2026 at 6:19 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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The Two Speakers In Full

Klipsch Heresy IV: $3,198/pair Amazon Crutchfield eBay

Klipsch Heresy IV ranking card

Pros: Very high 94.5dB/2.83V/1m sensitivity in Erin’s anechoic measurement—well below Klipsch’s 99dB in-room claim, but still excellent—and strong short-term output from a 12-inch woofer plus horn-loaded midrange and tweeter. The compact, furniture-grade Heritage cabinet is easier to place than most high-efficiency designs, and dynamics at moderate levels can sound lively. A stable four-ohm-capable amplifier can produce substantial SPL with relatively little voltage.

Cons: Erin measured a 77Hz F3 and response rolling away near 100Hz in-room, so a subwoofer is required for modern full-range reproduction. The impedance dips to about 4 ohms, reducing the practical amplifier advantage implied by its sensitivity. Pronounced directivity mismatch at the driver transitions, impedance/response resonances and elevated distortion spikes around the crossover remain audible concerns that EQ cannot fully solve. At 102dB Erin measured roughly 1.5dB midband compression; at 96dB distortion rises around crossover. Performance is difficult to justify at the price, and Erin explicitly did not recommend it.

Full Klipsch Heresy IV review and specifications →

Bass Extension (-10dB)50.0Hz (measured, Erin's Audio Corner)
Bass Extension (-3dB)77Hz (measured, Erin's Audio Corner)
Dimensions24.8"H x 15.6"W x 13.3"D
Drivers1" horn-loaded tweeter; 1.75" horn-loaded midrange; 12" woofer
ImpedanceApproximately 4 ohms minimum (measured, Erin's Audio Corner)
Sensitivity94.5dB/2.83V/1m (measured, Erin's Audio Corner)
Weight45 lb each
Woofer Cabinetported, rear
Check current price at Amazon ($3,198/pair) →Check current price at Crutchfield ($3,198/pair) →Search eBay for Klipsch Heresy IV →

MoFi SourcePoint 888: $5500 Crutchfield eBay

MoFi SourcePoint 888 ranking card

Pros: Three-way vented design: an 8” coaxial mid-range/1.25” dome tweeter driver plus two additional 8” woofers crossed at about 130Hz, giving genuinely full-range output (F3 34Hz, F10 26Hz) other than the deepest subsonic content. Ranked by the reviewer among his personal top three speakers out of roughly 200 tested, alongside the KEF Blade 2 Meta and Dutch & Dutch 8C, despite costing a small fraction of either. Excellent compression/dynamic-range linearity, holding its own against much pricier speakers like the March Audio Sointuva AWG, KEF Reference 1 Meta, and KEF Blade 2 Meta. On-axis (0°) and 30°-off-axis estimated in-room responses track within about 1-1.5dB of each other above 500Hz, so tonal balance barely changes with placement or listening angle - excellent for multi-seat home theater or entertaining. Wide horizontal dispersion of about ±60°. Distortion stays low: under 1% at 86dB, and under 1% above 200Hz even at 96dB, with multitone distortion mostly under 1% as well. Not a difficult amplifier load (5-ohm minimum impedance, 4.2-ohm minimum EPDR). Checks the three boxes the reviewer considers essential for a home theater speaker: low compression, low distortion, and excellent directivity.

Cons: A significant investment, best ordered from a dealer with a good return policy. Large and heavy floorstander (about 96 lbs, 42” tall) requiring real floor space and rear clearance. Positioning is fairly specific: needs about 2 feet from the rear wall - closer causes boominess in the 40-50Hz region, farther loses bass extension. Vertical dispersion (about ±50°) is narrower than horizontal (about ±60°), since the two 8” woofers are spaced vertically apart on a tower cabinet, causing some vertical mismatch at lower frequencies. A small on-axis dip around 500Hz and a deliberately lower tweeter level (about 0.5dB below the midrange) are intentional design choices for smoother in-room response, but mean the raw on-axis measurement isn’t perfectly flat. A mild diffraction-related dip appears around 3kHz in directivity measurements. Toeing the speaker out more than about 10° starts to noticeably reduce top-end energy.

Full MoFi SourcePoint 888 review and specifications →

Bass Extension (-10dB)26Hz (measured, Erin's Audio Corner)
Bass Extension (-3dB)34Hz (measured, Erin's Audio Corner)
Dimensions41.2"H x 12.6"W x 16.1"D (1046.5 x 320 x 408.9 mm)
DriversDual 8" paper cone woofers, 8" Paper Cone midrange, 1.25" wide roll soft dome tweeter
Impedance6 ohms nominal, 5 ohms minimum (measured, Erin's Audio Corner)
Sensitivity85.6dB (measured, Erin's Audio Corner)
Weight94.8 lbs / 43 kg each
Woofer Cabinetported, rear
Check current price at Crutchfield →Search eBay for MoFi SourcePoint 888 →