Overview

The JBL 4367 is a passive, two-way floorstanding studio monitor introduced in 2015, adapting driver technology from JBL Professional’s M2 Master Reference Monitor for home use [1][2]. Its 380 mm 2216Nd-1 woofer is an M2-derived version modified for a lower resonance frequency. The D2430K compression driver, 700 Hz passive crossover, front-panel HF/UHF adjustments and bi-wire/bi-amplifier terminals complete the system [1][4]. External amplification is required. The manufacturer’s dimensions are 941 × 560 × 425 mm (H × W × D), making cabinet width and placement space important considerations [1].

Scientific Validity

\[\Large \text{0.6}\]

The manufacturer specifies 30 Hz–40 kHz (-6 dB) and 94 dB sensitivity at 2.83 V/1 m [1]. Erin’s Audio Corner’s Klippel NFS results instead show 92.6 dB mean sensitivity, a 43 Hz -3 dB point and a 31 Hz -10 dB point. Its on-axis linearity annotation is -2.46/+4.51 dB over 80 Hz–16 kHz. Horizontal off-axis curves have an elevation around 3–5 kHz, separate from the radiation-pattern change around the 700 Hz crossover [3].

At 96 dB/1 m, the distortion graph gives approximately -54 dB THD at 1 kHz, or 0.2%, rising to approximately -38 dB, or 1.3%, around 8 kHz; these percentages are graph-derived estimates. The latter is predominantly second harmonic, so its audibility differs from the same percentage at 1 kHz. The 102 dB/1 m compression sweep remains within roughly 0.3 dB above 40 Hz. This is a consecutive 2.7-second sweep test, not a continuous maximum-output rating [3].

Stereophile measured 92.7 dB(B)/2.83 V/m and broadly even response using a different, quasi-anechoic procedure. Its minimum impedance was 5.4 ohms, but the combined impedance/phase load reached an equivalent peak dissipation resistance of 2.4 ohms around 900 Hz; a 4-ohm-capable amplifier is advisable [2]. The evidence supports strong output capability and generally balanced midrange response, with bass roll-off and frequency-dependent response/distortion irregularities preventing uniformly accurate wideband reproduction. Comparable acoustic IMD and long-duration output limits remain unestablished.

Technology Level

\[\Large \text{0.6}\]

The in-house Differential Drive motor uses two voice coils and magnetic gaps, with provisions for flux stabilization and heat transfer. The D2430K uses two annular diaphragms with separate motors, coupled to the proprietary HDI waveguide. JBL documents patent-backed designs and detailed driver/crossover engineering, demonstrating specialized transducer expertise [1][4]. These are substantive implementations, although mature electromechanical and passive-circuit technologies rather than recent digital integration. There is no onboard DSP.

Cost-Performance

\[\Large \text{1.0}\]

AV Luxury Group lists the 4367 at 8,250 USD each, or 16,500 USD per pair, but both finishes are out of stock. This retained listing is the price basis for the evaluation; a currently purchasable new pair could not be verified [6].

Lower-cost home floorstanders with published Klippel measurements include the following. Prices are US storefront prices for a pair, excluding temporary promotions; all require external amplification. Measured limitations refer to Erin’s Audio Corner’s tweeter-axis tests, not manufacturer bandwidth claims [3][8][10][13].

Candidate	Pair price	Relevant measured comparison
Rockville RockTower 68B	234.90 USD [12]	-3 dB point 58 Hz; approximately -10.4/+7.8 dB on-axis deviation over 80 Hz–16 kHz. Both are worse than the 4367 [13].
Polk Monitor XT60	458 USD (229 USD each) [7]	At 96 dB/1 m, THD around 60 Hz is approximately 10%; its 102 dB sweep also shows substantial bass compression. It does not match the 4367’s low-frequency output performance [8].
MoFi SourcePoint 888	5,495 USD [9]	Its -3 dB point of 34 Hz extends deeper, but 100 Hz THD at 96 dB/1 m is approximately 1.4%, versus approximately 0.35% for the 4367. Measured sensitivity is 7 dB lower, increasing amplifier requirements [3][10].

Neither the 888 nor the cheaper candidates provides the 4367’s HF/UHF adjustment capability without additional equipment [1][7][9][12]. A 225 USD miniDSP 2x4 HD supplies equalization, bringing an 888-based component subtotal to 5,720 USD before additional cabling, shipping and applicable tax [11]. This supplies tonal adjustment, but does not eliminate the measured distortion difference. A subwoofer with high-pass filtering below 100 Hz also leaves the 888’s higher distortion around 300–500 Hz: at 96 dB/1 m, its THD is approximately -46 dB at 400 Hz, versus approximately -60 dB for the 4367 [3][10]. Equalization cannot remove this nonlinear difference. No cheaper configuration examined matches the combination of adjustment functions, frequency response, distortion and output performance, even with these additions. The 4367 is therefore treated as the least expensive equivalent option supported by the available evidence, giving CP 1.0 at the stated reference price. This conclusion concerns matching its full capabilities; the less expensive candidates remain options for users who do not need the same output performance.

Reliability & Support

\[\Large \text{0.7}\]

JBL’s current US warranty states five years for non-powered loudspeakers unless the product’s warranty card specifies otherwise. It applies to eligible original purchases from authorized US sellers and US use. Covered service includes repair or replacement under the warranty terms [5]. JBL/Harman provides an international manufacturer support network, although warranty eligibility and service arrangements are regional [1][5]. The braced cabinet and internal, separate crossover boards are conventional serviceable assemblies, but the dual-diaphragm driver and capacitor-bias circuitry make this more than a minimal passive network [4]. Product-specific failure statistics, guaranteed long-term parts availability and representative out-of-warranty repair costs are not established. Warranty length and support infrastructure are strengths, without evidence for an exceptional longevity claim.

Rationality of Design Philosophy

\[\Large \text{0.5}\]

The design pursues controlled radiation, heat management and adjustable tonal balance through purpose-built drivers and an integrated passive network. These mechanisms have practical acoustic functions; compatibility with conventional external amplifiers also gives the passive format a clear use case [1][4]. However, the white paper additionally promotes capacitor DC bias with claims of improved detail and decay, without controlled evidence that the bias itself produces an audible benefit [4]. That subjective justification weakens an otherwise engineering-led approach. The heat-dissipating motor structures and waveguide address identifiable acoustic problems, whereas the extra capacitor-bias components are justified primarily by subjective language. The design consequently combines purposeful acoustic engineering with an unnecessary emphasis on unverified component-level sonic benefits.

Advice

The 4367 suits a spacious home listening setup requiring high sensitivity and low short-term compression from passive speakers. Allow for the wide cabinets, use an amplifier comfortable with 4-ohm loads, and assess listening height, toe-in and room reflections rather than relying only on axial response. Its HF/UHF controls offer limited tonal adjustment, not room correction. Buyers seeking onboard amplification or DSP will need a different product or additional equipment. Confirm availability, the full pair price and local warranty terms before purchasing. The CP assessment uses the retained reference price and requires the same functions and output performance; it does not imply that every listening setup needs this capability.

References

[1] JBL — Studio Monitor 4367 — accessed 2026-09-12; manufacturer specifications. [2] Stereophile — JBL 4367 measurements — accessed 2026-09-12; MLSSA, 50-inch tweeter-axis measurement averaged over a 30° horizontal window, near-field bass splice below 300 Hz; DATS V2 impedance measurement. [3] Erin’s Audio Corner — JBL 4367 Studio Monitor Speaker Review — 2022-04-03, accessed 2026-09-12; Klippel NFS, CTA-2034-A, tweeter reference, 2.83 V/1 m response, 86/96 dB distortion and 76–102 dB compression sweeps. [4] JBL — 4367 White Paper — accessed 2026-09-12; driver, crossover and capacitor-bias descriptions. [5] JBL Support — JBL Warranty Information — accessed 2026-09-12; US terms. [6] AV Luxury Group — JBL 4367, sold each — accessed 2026-09-12; listed price, both finishes out of stock. [7] Polk Audio — Monitor XT60 — accessed 2026-09-12; US single-speaker price and specifications. [8] Erin’s Audio Corner — Polk XT60 review — accessed 2026-09-12; Klippel NFS, tweeter axis, grille removed, 96 dB/1 m distortion and 76–102 dB compression sweeps. [9] MoFi Electronics — SourcePoint 888, pair — accessed 2026-09-12; US pair price, availability and specifications. [10] Erin’s Audio Corner — MoFi SourcePoint 888 review — 2024-07-06, accessed 2026-09-12; Klippel NFS, tweeter axis, grille removed, 2.83 V/1 m response and 96 dB/1 m distortion. [11] miniDSP — 2x4 HD — accessed 2026-09-12; component price and EQ functionality, excluding destination-dependent costs. [12] Rockville — RockTower 68B Pair — accessed 2026-09-12; US pair price and specifications. [13] Erin’s Audio Corner — Rockville RockTower 68B review — 2025-07-12, accessed 2026-09-12; Klippel NFS, tweeter axis, grille removed, 2.83 V/1 m response.

(2026.9.12)