KRK Classic 5 vs M-Audio BX4 D3

Last updated: August 25, 2026

Short answer: the KRK Classic 5 for better sound quality, the M-Audio BX4 D3 for the lower price. The KRK Classic 5 ranks #30 of 64 powered bookshelf speakers at $280. The M-Audio BX4 D3 ranks #56 at $149, $131 cheaper.

What the KRK Classic 5 offers: High-quality Klippel NFS data produces a 5.22 Spinorama preference score with a subwoofer, essentially level with the Edifier MR4. Bass reaches 60.1Hz at -3dB and 54.2Hz at -6dB, and the speaker responds especially well to EQ: Spinorama’s corrected score rises from 2.71 to 5.34 without a subwoofer and from 5.22 to 7.71 with one. Watch for: The unequalized response has a large 6.5dB frequency-deviation band, elevated splashy treble above 4kHz, crossover directivity error, and sharply narrowing tweeter dispersion. Distortion becomes extreme below 50Hz. Its raw 2.71 preference score is weak without a subwoofer, so EQ and careful toe-in are strongly recommended.

What the M-Audio BX4 D3 offers: Affordable compact powered pair with 4.5-inch Kevlar woofers, rear EQ controls, balanced TRS, RCA and front-panel aux/headphone connections. Spinorama predicts a 5.14 preference score with a subwoofer and useful nearfield bass extension near 62Hz. Watch for: The third-party measurement is low confidence, and the small shared-amplifier design has limited output and bass headroom. Its raw no-subwoofer preference score is modest, the rear port complicates wall placement, and only the left cabinet contains amplification and controls.

Buy the KRK Classic 5 if sound quality matters more than the price. Buy the M-Audio BX4 D3 if the price matters more than sound quality.

If sound quality matters at all to you, skip the M-Audio BX4 D3. It ranks near the bottom of the 64 powered bookshelf speakers, so look higher up the list instead.

Buy the KRK Classic 5 at Amazon ($280) →Buy the M-Audio BX4 D3 at Amazon ($149/pair) →

KRK Classic 5 vs M-Audio BX4 D3

Specifications Side By Side

KRK Classic 5 M-Audio BX4 D3
Price$280$149/pair
Ranked#30 of 64 in Medium Size Powered Bookshelf Speakers#56 of 64 in Medium Size Powered Bookshelf Speakers
Bass Extension (-3dB)60.1Hz (Spinorama/Audio Science Review)-
Bass Extension (-6dB)54.2Hz (Spinorama/Audio Science Review)-
Spinorama Preference Score2.71 without subwoofer; 5.22 with subwoofer-
Dimensions9.7"H x 7.4"W x 11.2"D (246.4 x 188 x 284.5 mm)8.9H x 6.1W x 6.9D in
Frequency Response56Hz-30KHz (+-3dB) (Manufacturer specified)-
InputsRCA, TRS, XLRTRS, RCA, 3.5mm aux; headphone output
Weight12.9 lbs / 5.87 kg9.8 lbs/pair
Drivers5" (127mm) woofer1" dome tweeter, 4.5" Kevlar woofer
AppNo-
BluetoothNo-
EQYes (Room adjustment)-
Output Power50w RMS Per Speaker-
Enclosure-2-way powered stereo pair, rear-ported
Power Output-120W peak system
Buy the KRK Classic 5 at Amazon ($280) →Buy the M-Audio BX4 D3 at Amazon ($149/pair) →

More useful head-to-heads from the same speaker class:

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

KRK Classic 5: $280 Amazon eBay

KRK Classic 5 ranking card

Pros: High-quality Klippel NFS data produces a 5.22 Spinorama preference score with a subwoofer, essentially level with the Edifier MR4. Bass reaches 60.1Hz at -3dB and 54.2Hz at -6dB, and the speaker responds especially well to EQ: Spinorama’s corrected score rises from 2.71 to 5.34 without a subwoofer and from 5.22 to 7.71 with one.

Cons: The unequalized response has a large 6.5dB frequency-deviation band, elevated splashy treble above 4kHz, crossover directivity error, and sharply narrowing tweeter dispersion. Distortion becomes extreme below 50Hz. Its raw 2.71 preference score is weak without a subwoofer, so EQ and careful toe-in are strongly recommended.

Full KRK Classic 5 review and specifications →

AppNo
Bass Extension (-3dB)60.1Hz (Spinorama/Audio Science Review)
Bass Extension (-6dB)54.2Hz (Spinorama/Audio Science Review)
BluetoothNo
Dimensions9.7"H x 7.4"W x 11.2"D (246.4 x 188 x 284.5 mm)
Drivers5" (127mm) woofer
EQYes (Room adjustment)
Frequency Response56Hz-30KHz (+-3dB) (Manufacturer specified)
InputsRCA, TRS, XLR
Output Power50w RMS Per Speaker
Spinorama Preference Score2.71 without subwoofer; 5.22 with subwoofer
Weight12.9 lbs / 5.87 kg
Check current price at Amazon ($280) →Search eBay for KRK Classic 5 →

M-Audio BX4 D3: $149/pair Amazon eBay

M-Audio BX4 D3 ranking card

Pros: Affordable compact powered pair with 4.5-inch Kevlar woofers, rear EQ controls, balanced TRS, RCA and front-panel aux/headphone connections. Spinorama predicts a 5.14 preference score with a subwoofer and useful nearfield bass extension near 62Hz.

Cons: The third-party measurement is low confidence, and the small shared-amplifier design has limited output and bass headroom. Its raw no-subwoofer preference score is modest, the rear port complicates wall placement, and only the left cabinet contains amplification and controls.

Full M-Audio BX4 D3 review and specifications →

Dimensions8.9H x 6.1W x 6.9D in
Drivers1" dome tweeter, 4.5" Kevlar woofer
Enclosure2-way powered stereo pair, rear-ported
InputsTRS, RCA, 3.5mm aux; headphone output
Power Output120W peak system
Weight9.8 lbs/pair
Check current price at Amazon ($149/pair) →Search eBay for M-Audio BX4 D3 →