Applications

- These models have been designed for Bass-Midrange applications in the field of Sound Reinforcement
- They can be used in two-way and three-way systems of 300W AES when high sounding quality and high efficiency are needed
- Maximum recommended X-over freq. is 2.0kHz, Optimum Bass-Reflex loading is situated between 40L and 50L tuned from 48Hz to 52Hz

Design Concept
Deflection Controlled Diaphram
- Optimized for dynamic damping
- Deflection Controlled Diaphragm technology consists in optimizing the shape and material of the diaphragm so that it works as a mechanical transmission line, to avoid breaking modes as well as mechanical threshold which destroy sound quality
- It is this leading edge technology which offers substantial sonic advantages
- Those advantages include sound coherency, fast transients, stable sound imaging, high sensitivity, wide frequency range and reduced directivity pattern

Vented Compact Magnet System
- Carefully optimized to obtain maximum transducing efficiency while avoiding unlinear behaviour such as coil inductance variation with position, flux modulation, harmonic distortion, rest position offset, air compression and off-axis voice-coil pushing
- Design incorporates a T-shaped and vented pole piece as well as a flux stabilizing ring
- It also takes into consideration demagnetization and cold temperatures

Intercooler System
- Entirely integrated into the loudspeaker itself, the Intercooler System extracts the heat produced by the Joule effect in the voice-coil
- It does so via an air flow directed through the heatsink rims of the basket by the motion of the dust-cap and the spider
- The gain brought about by this technology is over 20% of extra power, so for example, a 3" coil according to this design has the same power handling capacity as a classical 4" one

Features
- Power handling capacity - 300W AES
- Reference Efficiency (1W @ 1m) - 96 dB SPL
- SPL max (continuous) - 117 dB SPL
- Usable frequency range - 40-2000 Hz
- Environmental withstanding - Outdoor

Architectural Specifications
- Nominal Diameter - 300mm
- Frame - High tensile alloy pressure die-cast basket with patented Intercooler System
- Magnet System - 2.5" highly energized, heat extracting design with vented pole piece flux stabilizing ring
- Voice Coil - High-temperature stabilized copper-clad aluminium ribbon wound on vented high-strength glass polyimide
- Cone Assembly - High-strength cellulose fiber cone impregnated and coated on both sides with damped resins, fitted with fabric dome, high-speed flat, damped surround and acoustically damped rear cavity

- Speaker Mass - 6.40kg

Typical Characteristics

		4500	4510
Rated Impedence	Z	6	8	Ω
Reference Efficiency (1W @ 1m)	-	96	96	dB SPL
Usable Frequency Range 1	-	40-2000	40-2000	Hz
Power Handling Capacity 2 (AES)	-	300	300	W
Max Sound Pressure Level 3	SPL max	117	117	dB SPL
Min. Impedence modulus	Z min	4.8 @ 260Hz	6.5 @ 250Hz	Ω
Voice-coil Inductance 4 @ 1 kHz	L e1k	0.81	1.08	mH
@ 10 kHz	L e10k	0.35	0.46	mH
BI product	BI	14.2	15.1	N/A
Moving Mass	M ms	0.055	0.054	Kg