Accuton BD1.5AM-4-609/610
Best box: 0.01 L sealed · Fc 1078.4 Hz · F3 912.6 Hz
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Comparable 1.2" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Accuton BD1.5AM-4-609/610 does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
⚠️ Engineering Notice for Builders
- Straight vent would be 0.6 cm long: not physically buildable as a simple tube. Use a passive radiator, a folded slot port or model a 3D folded duct in Load Forge Studio.
- Limited linear excursion (Xmax: 0.7 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Textbook Bass Reflex — not recommended
PORT NOT BUILDABLE| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 648.1 Hz |
| F3 (-3 dB Cutoff) | 615.5 Hz |
| F6 / F10 Extension | 593.5 Hz / 563.8 Hz |
| Port Inner Diameter | Ø 20.0 cm |
| Port Physical Length | No real tube length at this tuning — use a passive radiator |
| First Pipe Resonance | 26616.0 Hz |
| Estimated MOL @ F3 | 98.1 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.78 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.103; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 0.01 Liters |
| System Q (Qtc) | 1.103 (above Butterworth: Qtc cannot fall below Qts (0.78)) |
| System Resonance (Fc) | 1078.4 Hz |
| F3 (-3 dB Cutoff) | 912.6 Hz |
| F6 / F10 Extension | 762.9 Hz / 617.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 762.5 Hz |
| Total Q (Qts) | 0.78 |
| Electrical Q (Qes) | 0.88 |
| Mechanical Q (Qms) | 6.89 |
| Equivalent Volume (Vas) | 0.0 Liters |
| Diaphragm Area (Sd) | 8.7 cm² |
| DC Resistance (Re) | 4.0 Ω |
| Efficiency Bandwidth Product (EBP) | 866.9 |
| Linear Excursion (Xmax) | 0.7 mm |
| Thermal Power (Pe) | 120.0 W |
| Nominal Diameter | 1.2" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Accuton BD1.5AM-4-609/610?
A simple ported box is not recommended for Accuton BD1.5AM-4-609/610: the textbook alignment (1.5 liters tuned to 648.1 Hz) needs a 0.6 cm port, and no nearby retune stays buildable without a bass hump. A sealed box, a passive radiator or a folded duct is the practical choice.
Can Accuton BD1.5AM-4-609/610 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.01 liters with a Qtc of 1.103 (above Butterworth: Qtc cannot fall below Qts (0.78)), the system exhibits an F3 of 912.6 Hz.
What port dimensions should be used for Accuton BD1.5AM-4-609/610 to avoid port chuffing?
A straight 20.0 cm port would need 0.6 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
Shareable Acoustic Card for Forums & Social Media
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