Applications

- These models are the ”long excursion” versions of types SP1500/1510
- They are dedicated to being used when applications require low-midrange extension capability together with high SPL
- Their particular design ensures that they perform without any compromise in sound quality, making these models optimum for sound reinforcement systems as well as studio monitoring
- Their preferred frequency domain starts from 400Hz (single unit) or 300Hz (dual driver) in direct radiation, while 200Hz is possible when horn is mounted

Design Concept
Progressive Wave Diaphragm
- Optimized for low-midrange extended frequency domain
- The M17/E17 Series design is based on the Progressive Wave Diaphragm mechanical behaviour of the radiating area
- In this principal, the membrane is considered as a mechanical transmission line which should receive a constant given velocity together with critical damping properties to work properly
- This leading edge techology offers substantial sonic advantages 
- Among them:
  - Very low mechanical energy storage in the cone (so avoiding standing waves) which ensures           coherant sound
  - Fast transients
  - Stable sound imaging
  - High sensitivity
  - Wide frequency range
 -  Very-low 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 - 250W ABS
- Reference Efficiency (1W @ 1m) - 97 dB SPL
- SPL max (continuous) - 117 dB SPL
- Usable frequency range - 300-5000 Hz
- Environmental withstanding - Outdoor✚

Architectural Specifications
- Nominal Diameter - 166mm
- Frame - High tensile alloy pressure die-cast basket with patented Intercooler System
- Magnet System - 2" highly energized, heat extracting design with vented pole piece and flux stabilizing ring
- Voice Coil - High-temperature stabilized copper-clad aluminium ribbon wound on vented high-strength glass polyimide former
- Cone Assembly - High-strength cellulose fiber cone impregnated and coated on both sides with damped resins, fitted with central carbon-fibre dome, high-speed flat damped surround and acoustically damped rear cavity

- Speaker Mass - 2.15kg

Typical Characteristics

		1660	1670
Rated Impedence	Z	8	16	Ω
Reference Efficiency (1W @ 1m)	-	97	97	dB SPL
Usable Frequency Range 1	-	300-5000	300-5000	Hz
Power Handling Capacity 2 (AES)	-	250	250	W
Max Sound Pressure Level 3	SPL max	117	117	dB SPL
Min. Impedence modulus	Z min	5.8 @ 650Hz	13.5 @ 600Hz	Ω
Voice-coil Inductance 4 @ 1 kHz	L e1k	0.55	1.51	mH
@ 10 kHz	L e10k	0.26	0.72	mH
BI product	BI	9.8	16.1	N/A
Moving Mass	M ms	0.0110	0.0110	Kg