HK Audio Linear 5 MK2 115 FA vs RCF NX 915-A

Short answer: the RCF NX 915-A. Both are rated 3.6/5 for sound quality (#25 and #27 of 62 15-inch pa speakers), and the RCF NX 915-A costs $1,541 against $1,769.99 for the HK Audio Linear 5 MK2 115 FA, so with nothing between them on sound quality, price settles it.

The case for the HK Audio Linear 5 MK2 115 FA: Part of HK Audio’s LINEAR 5 MK II series alongside the HK Audio Linear 5 MK2 112 FA: the 15-inch full-range model, with bass to 54Hz (-10dB) and the highest output of the series. The catch: No independent measurements yet, so it can’t be compared with ranked PA speakers.

Why pick the RCF NX 915-A: The plywood enclosure, FiRPHASE/Bass Motion Control processing and flexible rigging make it a sturdier systems alternative to the RCF ART 715-A MK5, with a wide 100° x 60° pattern and 131dB claimed peak. Watch for: The truncated vendor measurement does not yield a preference score, preventing a confident tonal comparison with the scored leaders.

Buy the RCF NX 915-A. Both are rated the same for sound quality, and it costs $228.99 less than the HK Audio Linear 5 MK2 115 FA.

About the ratings: the HK Audio Linear 5 MK2 115 FA’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 3.2 to 4.0, so this verdict could change once it is measured.

Still deciding? The full PA & Live Sound rankings cover every ranked option.

Specifications Side By Side

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Prices on this page were last checked October 11, 2026 at 4:59 PM 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

HK Audio Linear 5 MK2 115 FA: $1,769.99 Estimated Full Compass eBay

Same family: the HK Audio Linear 5 MK2 110 XA (smaller model, estimated 3.6/5), the HK Audio Linear 5 MK2 112 FA (smaller model, estimated 3.7/5), the HK Audio Linear 5 MK2 112 XA (smaller model, estimated 3.7/5), the HK Audio Linear 5 MK2 115 XA (larger model, ranked lower, estimated 3.5/5) and the HK Audio Linear 5 MK2 308 LTA (larger model, estimated 3.3/5). See every HK Audio Linear 5 generation.

Pros: Part of HK Audio’s LINEAR 5 MK II series alongside the HK Audio Linear 5 MK2 112 FA: the 15-inch full-range model, with bass to 54Hz (-10dB) and the highest output of the series. A 1,200W peak (600W RMS) bi-amplified Class D module with DSP drives it, and HK rates it at 138dB peak / 130dB average with 70° x 50°, rotatable coverage.

Cons: No independent measurements yet, so it can’t be compared with ranked PA speakers. At 30.2 kg it is heavy for one person to lift onto a stand.

Full HK Audio Linear 5 MK2 115 FA review and specifications →

Released	2023 (3 years ago)
Amplifier Power	1,200W peak (600W RMS), bi-amplified
Bluetooth	No
Configuration	Active 2-way PA speaker
Coverage	70° x 50°, rotatable
DSP	Yes
Drivers	15” woofer, 1” compression driver
Frequency Response	57Hz - 18kHz (-6dB), 54Hz (-10dB) (manufacturer specified)
Maximum SPL	138dB peak / 130dB average (manufacturer specified)
Passive	No
Rigging	3 x M8 rigging points; DuoTilt 3°/7° pole mount
Weight	66.6 lbs (30.2 kg)
XLR Input	Yes

• Links
  • Official HK Audio Linear 5 MK2 115 FA Website
• Reviews, Comparisons and Sound Samples
  • No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
• Head-to-Head Comparisons
  • HK Audio Linear 5 MK2 115 FA vs FBT Mitus 115A
  • HK Audio Linear 5 MK2 115 FA vs Yamaha DZR315

RCF NX 915-A: $1,541.00 Amazon B&H Photo Video Guitar Center eBay

Same family: the RCF NX 910-A (smaller model, rated 3.5/5), the RCF NX 912-A (smaller model, rated 4/5), the RCF NX 932-A (smaller model, rated 4.2/5) and the RCF NX 945-A (larger model, ranked higher, rated 4.1/5).

Pros: The plywood enclosure, FiRPHASE/Bass Motion Control processing and flexible rigging make it a sturdier systems alternative to the RCF ART 715-A MK5, with a wide 100° x 60° pattern and 131dB claimed peak. Measured bass extension of 53Hz (-3dB).

Cons: The truncated vendor measurement does not yield a preference score, preventing a confident tonal comparison with the scored leaders. At 24.1kg it is notably heavier than the ART-series alternatives.

Full RCF NX 915-A review and specifications →

Released	Jul 2021 (5 years ago)
AES Input	No
Amplifier Power	2100W peak (1400W LF + 700W HF)
Aux Input	No
Bass Extension (-3dB)	53Hz (measured, vendor Spinorama data)
Bluetooth	No
Cabinet Material	Polyurea-coated plywood
Coaxial Input	No
Configuration	Active 2-way bass-reflex PA speaker
Coverage	100° x 60°
Crossover Frequency	1600Hz
DSP	Yes, FiRPHASE and Bass Motion Control
Dimensions	27.8”H x 16.5”W x 17.7”D (705 x 419.6 x 450.4 mm)
Drivers	15” woofer, compression driver
Frequency Response	45Hz - 20kHz (manufacturer specified)
Guitar Input	No
HDMI Input	No
Inputs	XLR/TRS combo input and XLR output
Maximum SPL	131dB peak (manufacturer specified)
Microphone Input	No
Optical Input	No
Passive	No
RCA Input	No
Rigging	6 x M10 inserts
TRS Input	Yes
USB Input	No
Weight	53.1 lbs (24.1 kg)
XLR Input	Yes

• Links
  • RCF NX 915-A Product Information
• Reviews, Comparisons and Sound Samples
  • Spinorama Measurements
• Head-to-Head Comparisons
  • RCF NX 915-A vs RCF ART 715-A MK5
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  • RCF NX 915-A vs Vue Audiotechnik A-15
  • RCF NX 915-A vs Yamaha DXR15mkII
  • RCF NX 915-A vs Seeburg X8
  • RCF NX 915-A vs Yamaha DZR315
  • RCF NX 915-A vs Yamaha DXR15mkIII
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