HiFi SPECS

A/B comparison · Speakers

Martin Logan Motion 15 vs KEF LS50 Meta

Specs from both manufacturer datasheets Updated Jul 13, 2025 Scored with 20 + 13 Amazon reviews

Martin Logan Motion 15 vs KEF LS50 Meta in brief

  • Spec rows: Martin Logan Motion 15 wins 2, KEF LS50 Meta wins 0, 10 tied or not compared, of 12 rows.
  • Our scores: Martin Logan Motion 15 7.9/10, KEF LS50 Meta 8.8/10.
  • KEF LS50 Meta wins: sound quality (9 vs 8), bass response (7.5 vs 6.5), midrange clarity (9.2 vs 8), treble detail (9 vs 8.5), design (9.3 vs 9), value for money (8.7 vs 7.5).
  • Who should buy which: The KEF LS50 Meta wins every aspect where the two differ.
CH A Martin Logan Motion 15

Martin Logan Motion 15

Channel A · Bookshelf · 2012
VS
CH B KEF LS50 Meta

KEF LS50 Meta

Channel B · Bookshelf · 2020

Premium, about $1,450 to $1,600 a pair

Martin Logan Motion 15 KEF LS50 Meta
20 Hz 100 1k 10k 20k
7.9/10Martin Logan 8.8/10KEF

Rows won, of 12 compared Martin Logan 2 · KEF 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 5.25" Mid-woofer Drivers 1x 0.98" Tweeter + 1x 5.12" Mid-woofer
60 Hz to 25 kHz -19 Hz deeper ±3 dB Frequency response 79 Hz to 28 kHz ±3 dB · 47 Hz to 45 kHz extended
Not published Max SPL 106 dB
Ported (Bass Reflex) Enclosure Ported (Bass Reflex)
Not published Port tuning 46 Hz

Power, electrical, physical

92 dB +7 dB 2.83 V/1 m Sensitivity 85 dB 2.83 V/1 m
5 Ω Impedance 8 Ω
20 to 200 W Amp range 40 to 100 W
Not published Speaker terminals 5-way binding posts From the Amazon listing Source
290 mm · 12 lb Checked against the maker's own sheet, Sep 2026 Source Height · weight 279 mm · 17.2 lb Checked against the maker's own sheet, Sep 2026 Source
5 yr Warranty 5 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

Martin Logan Motion 15 KEF LS50 Meta
Sound quality 8.0 9.0
Bass response 6.5 7.5
Midrange clarity 8.0 9.2
Treble detail 8.5 9.0
Design 9.0 9.3
Value for money 7.5 8.7

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

Availability

Where they stand on price

Martin Logan Motion 15

The Martin Logan Motion 15 isn't sold new any more. The closest current model is the Martin Logan Motion 15i.

Why this one: Same bookshelf line and size that directly replaced the Motion 15, same specs and sensitivity

Availability last checked Jul 13, 2025
KEF LS50 Meta
Premium · about $1,450 to $1,600 a pair Availability last checked Jul 13, 2025

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.