Shinjitsu Audio
Shinjitsu Classic SA12 - CP755ND (First-Run)
Shinjitsu Classic SA12 - CP755ND (First-Run)
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Shinjitsu Classic SA12 — CP755ND (First-Run)
We’ve seen renewed demand for a classic loudspeaker—large-format woofer and true horn - voiced warm, punchy, and at life-like scale. Working with industry pros, long-time clients, and trusted reviewers, we built the SA12 to deliver room-filling music with easy dynamics and low fatigue.
The foundation is Beyma’s high-sensitivity 12BR70 treated-paper woofer: robust bass with a smooth, well-behaved roll-off right where a great horn wants to take over. For the top, we pair the renowned CP755ND compression driver with Beyma’s large-format TD460N constant-directivity horn, coupled through a precision-matched throat interface that maintains a flush, low-turbulence transition.
Why this combo? The CP755ND’s titanium diaphragm is bonded to a polymer surround, damping high-frequency breakup for detail without glare. The TD460N’s carefully shaped entry (the well-known “duck-bill” vane) preserves extension and even coverage to the top octave. Together, the pro-grade 12″ plus extended-range large horn deliver scale and immediacy few speakers match at this price.
How it sounds
- Room-filling scale — life-size images and effortless swing at sane watts.
- Warm, punchy bass — 12BR70 loads the room without bloat; tight start/stop.
- Coherent mids — low, steep crossover keeps voices in one “driver’s voice.”
- Smooth top end — polymer-surround CP755ND gives sparkle without splash.
Highlights
- Woofer: Beyma 12BR70 (treated-paper cone, high sensitivity, smooth hand-off)
- Horn system: Beyma CP755ND (1.4″ exit) on TD460N constant-directivity horn with a precision throat interface
- Crossover & voicing: acoustic LR4 target ~800–900 Hz with gentle CD HF shelf
- Cabinet: 13-ply Baltic birch, braced and hand-finished; 12 proprietary 3D-printed parts
- Matched pairs: built, measured, and level-matched before shipping
- Owner support: reserved CP755ND service stock for this first run
Specs preview
| System | 2-way, horn HF, vented LF |
| Woofer | Beyma 12BR70 |
| High-frequency | Beyma CP755ND (1.4″ exit) on TD460N (precision throat interface) |
| Impedance | 8 Ω nominal |
| Sensitivity | ~96–99 dB (2.83 V/1 m, target) |
| Crossover | ~800–900 Hz acoustic LR4 + CD shelf |
| Cabinet | Baltic birch, braced; hand-finished |
| Dimensions / weight | Published with final photos/plots |
Tech note — 1.4″ driver on a 2″ horn?
The SA12 uses Beyma’s CP755ND (a 1.4″ exit driver) coupled to Beyma’s TD460N (a 2″ throat). The TD460N employs a shaped entry (“duck-bill” vane) that forms a short diffraction slot right inside the horn. That slot—not the outer 2″ flange—sets the HF loading and wavefront. With a flush, concentric joint the result is smooth, extended response to 20 kHz.
- Clean interface: thin gaskets and precise centering keep the transition flush and low-turbulence.
- Measured proof: our on-axis and 15° off-axis sweeps are smooth through the 10–16 kHz region—the usual “air” trouble spot in poor transitions.
- Lower crossover with control: the combo reaches ~800–900 Hz comfortably while maintaining constant-directivity behavior.
Bottom line: you get big-horn dynamics and top-octave finesse. No “lost air”—just proper engineering and verification.
Availability
First-run allocation built from our reserved CP755ND stock. Numbered, matched pairs. We also reserve service stock for owners.
Pricing
Announced at launch. Join the list for first access to pricing, photos, and the order link.
FAQ
Is this a limited edition?
It’s a first-run allocation based on our current CP755ND stock.
Will there be more later?
Possibly by special order if a factory batch is organized; timing and price may change. Join the notify list to hear first.
What about parts and service?
We reserve CP755ND service stock for owners of this run.
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