| Content | General
Product type
Loudspeaker Chassis
Overall diameter
311.4 mm
Pitch Circle Diameter
297.4 mm
Cut- out Measurement
280.9 mm
Diameter of fixing holes
6.4 mm
Nominal Impedance
8 Ohm(s)
Nominal Load Capacity
75 W
Sensitivity (1 W / 1 m)
101.1 dB
Frequency response
80 - 5100 Hz
Voice Coil Material
copper
Depth of the magnetic gap
8 mm
Thiele & Small Parameter
Fs (Resonance Frequency)
111 Hz
Re (DC resistance)
7.36 Ohm(s)
Qms (mechanical quality)
15.07
Le (inductance of the voice coil)
0.55 mH
Qes (electrical quality)
1.09
Qts (overall quality)
1.02
Vas (equivalent volume)
29.61
BL (power factor)
11.95 T/m
Xmax (maximum displacement)
0.47 mm
Cms (elasticity of the suspension)
0.07 mm/N
Sd (membrane area)
552 cm²
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| 400 W continuous program power capacity |
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| 90° nominal coverage |
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| 50 – 20000 Hz response |
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| 98 dB sensitivity |
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| XO-2 dedicated crossover network |
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For use in 2-way or compact 3-way systems, the 1225 bass and mid range driver has a high sensitivity and excellent power handling characteristics.
General specifications | Nominal diameter (mm/in) | 305/12 | | Power Rating (AES, W rms) | 250 | | Nominal impedance (Ω) | 8 | | Voice coil diameter (mm/in) | 63.5/2.5 | | Magnet type | Ceramic | | Magnet weight (kg/oz) | 1.2/42 | | Chassis type | Pressed steel | | Sensitivity (dB) | 97 | | Frequency range (Hz) | 40-4000 | | Coil material | Round copper | | Former material | Polyimide | | Cone material | Kevlar loaded paper | | Surround material | Cloth-sealed | | Suspension | Single | | Xmax (mm/in) | 2.4/0.09 | | Gap depth (mm/in) | 8.0/0.31 | | Voice coil winding width (mm/in) | 12.7/0.50 | Small Signal Parameters | D (m/in) | 0.26/10.24 | | Fs (Hz) | 63 | | Mmd (g/oz) | 39.60/1.40 | | Mair | | | Qms | 6.70 | | Qes | 0.54 | | Qts | 0.50 | | Re (Ω) | 5.13 | | Vas (lt/ft3) | 54.5/1.92 | | BI (Tm) | 13.20 | | Cms (mm/N) | 0.14 | | Rms (kg/s) | 2.76 | | Le (mH) | | Mounting Information | Overall diameter (mm/in) | 309/12.17 | | Overall depth (mm/in) | 130/5.12 | | Cut-out diameter (mm/in) | 283/11.14 | | Mounting slot dimensions (mm/in) | Ø 7.9/0.31 | | Number of mounting slots | 4 | | Mounting slot PCD range (mm/in) | 297/11.69 | | Unit weight (kg/lb) | 4.1/9.0 | Packed Dimensions and Weight | Single pack size W x D x H (mm/in) | 330 x 330 x 150/13.0 x 13.0 x 5.9 | | Single pack weight (kg/lb) | 3/6.6 | | Multipack (60) size W x D x H (mm/in) | 1080 x 980 x 880/42.5 x 38.6 x 34.6 | | Multipack (60) weight (kg/lb) | 190/419 |
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Specification
Nominal Diameter 320 (12) mm (in)
Nominal Impedance (1) 8 Ohm
Minimum Impedence 7.5 Ohm
Nominal Power Handling (2) 450 W
Continuous Power Handling (3) 900 W
Sensitivity (1W/1m) (4) 95 dB
Frequency Range 40 - 1000 Hz
Voice Coil Diameter 76 (3) mm (in)
Winding Material Copper
Former Material Glass Fibre
Winding Depth 22 (0.9) mm (in)
Magnetic Gap Depth 10.5 (0.4) mm (in)
Flux Density 1.15 T
Thiele & Small Parameters
Fs 42 Hz
Re 6.1 Ohm
Qes 0.22
Qms 3.8
Qts 0.2
Vas 75 (2.6) dm3 (ft3)
Sd 522 (80.9) cm2 (in2)
Eta Zero 2.4 %
Xmax +/- 7 mm
Xvar +/- 9 mm
Mms 74 g
Bl 23.5 Txm
Le 2 mH
Mounting and Shipping Info
Overall Diameter 316 mm (12.4 in)
Bolt Circle Diameter 296 mm (11.6 in)
Baffle Cutout Diameter 282 mm (11.1 in)
Depth 140 mm (5.5 in)
Flange and Gasket Thickness 16 mm (5/8 in)
Net Weight 7.6 kg (16.7 lb)
Shipping Weight 8.4 kg (18.5 lb)
Shipping Box 340x340x170 mm
(13.4x13.4x6.7 in)
1For different impedances, please ask.
22 hours test made with continuous pink noise signal (6 dB crest factor).
Power calculated on rated minimum impedance.
3Power on Continuous Program is defined as 3 dB greater than the
Nominal rating.
4Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance. | DELTA-12A Standard American
Recommended for professional audio as a mid-bass or woofer (with high-pass filter) in vented enclosures.
*Good replacement for Yamaha 12″ JAY51200 (1216301A), JAY51100, JAY5120, JAY5110 woofers.
Or Loudspeakers C112V, SM12V, BR12, BR12M, S112V, S112IV, SM121V, SV12, SV12M & more
SPECIFICATION
- Nominal Basket Diameter 12“, 304.8 mm
- Nominal Impedance 8 ohms
- Power Rating Watts 400 W / Music Program 800 W
- Resonance 55 Hz
- Usable Frequency Range 54 Hz - 5 kHz
- Sensitivity 98.3
- Magnet Weight 56 oz.
- Gap Height 0.375“, 9.53 mm
- Voice Coil Diameter 2.5“, 63.5 mm
THIELE & Small Parameters
- Resonant Frequency (fs) 55 Hz
- DC Resistance (Re) 6.3
- Coil Inductance (Le) 0.74 mH
- Mechanical Q (Qms) 5.27
- Electromagnetic Q (Qes) 0.46
- Total Q (Qts) 0.43
- Compliance Equivalent Volume 81.3 liters (Vas) 81.3 liters / 2.9 cu. ft.
- Peak Diaphragm Displacement Volume 125 cc
- Mechanical Compliance of Suspension 0.21 mm/N
- BL Product (BL) 13.5 T-M
- Diaphragm Mass inc. Airload (Mms) 39 grams
- Efficiency Bandwidth Product (EBP) 120
- Maximum Linear Excursion (Xmax) 2.4 mm
- Surface Area of Cone (Sd) 519.5 cm²
- Maximum Mechanical Limit (Xlim) 9.9 mm
MOUNTING Information
- Recommended Enclosure Volume
Sealed N/A
Vented 25.5-85 liters/0.9-3 cu.ft.
- Overall Diameter 12.03“, 305.5 mm
- Baffle Hole Diameter 10.95“, 278.1 mm
- Front Sealing Gasket fitted as standard
- Rear Sealing Gasket fitted as standard
- Mounting Holes Diameter 0.25“, 6.4 mm
- Mounting Holes B.C.D. 11.59“, 294.3 mm
- Depth 5.35“, 136 mm
MATERIALS of Construction
- Aluminum voice coil
- Polyimide former
- Ferrite magnet
- Vented core
- Pressed steel basket
- Paper Cone
- Cloth cone edge
- Solid composition felt dust cap
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| 1400 W continuous program power capacity |
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| 100 mm (4 in) copper voice coil |
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| 45 – 1000 Hz response |
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| 93 dB sensitivity |
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| Double silicone spider with optimized compliance |
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