HiFi SPECS

A/B comparison · Speakers

Klipsch RB-81 vs Q Acoustics M20

Specs from both manufacturer datasheets Updated May 17, 2024 Scored with 10 + 10 Amazon reviews

Klipsch RB-81 vs Q Acoustics M20 in brief

  • Spec rows: Klipsch RB-81 wins 1, Q Acoustics M20 wins 0, 10 tied or not compared, of 11 rows.
  • Our scores: Klipsch RB-81 9.2/10, Q Acoustics M20 8.6/10.
  • Klipsch RB-81 wins: sound quality (9.6 vs 9), bass response (9.7 vs 7.5), design (9.1 vs 8), value for money (9.2 vs 8.8).
  • Q Acoustics M20 wins: midrange clarity (9.3 vs 9), treble detail (9.2 vs 8.8).
  • Who should buy which: Pick the Klipsch RB-81 for sound quality, bass response, design and value for money. Pick the Q Acoustics M20 if midrange clarity and treble detail matter most.
CH A Klipsch RB-81

Klipsch RB-81

Channel A · 2010
VS
CH B Q Acoustics M20

Q Acoustics M20

Channel B · Powered Bookshelf · 2021

About $729 a pair

Klipsch RB-81 Q Acoustics M20
20 Hz 100 1k 10k 20k
9.2/10Klipsch 8.6/10Q Acoustics

Rows won, of 11 compared Klipsch 1 · Q Acoustics 0 · tied or not compared 10

Datasheet · Side by side

Spec by spec

Built from both structured spec sheets. The delta chip sits on the winning side; rows with no defensible winner carry no chip.

Sound & drivers

2-way Configuration 2-way
1x 1" Tweeter + 1x 8" Mid-woofer Drivers 1x 0.75" Tweeter + 1x 5" Mid-woofer
46 Hz to 23 kHz Frequency responseReference not published 55 Hz to 22 kHz
Not published Max SPL 105 dB
Ported (Bass Reflex) Enclosure Ported (Bass Reflex)
Not published Port tuning 49 Hz

Power, electrical, physical

97 dB SensitivityReference not published 88 dB
8 Ω Impedance 6 Ω
Not published Amp range 25 to 75 W
483 mm · 66.1 lb Height · weight 279 mm · 24.3 lb Checked against the maker's own sheet, Sep 2026 Source
5 yr +3 yr Warranty 2 yr

A higher sensitivity figure means the same loudness from less amplifier power. Values come from each manufacturer datasheet.

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From our reviews

How it scored, paired

6 aspects, two channels

Klipsch RB-81 Q Acoustics M20
Sound quality 9.6 9.0
Bass response 9.7 7.5
Midrange clarity 9.0 9.3
Treble detail 8.8 9.2
Design 9.1 8.0
Value for money 9.2 8.8

Each aspect is scored 0 to 10 in our reviews, against the rest of the class.

Availability

Where they stand on price

Klipsch RB-81
Availability last checked May 17, 2024
Q Acoustics M20
Availability last checked May 17, 2024

We do not show live prices; price tiers are our editorial categories. As an Amazon Associate, HiFi Specs earns from qualifying purchases. Our scores and comparisons are never influenced by affiliate partners.