ISP Technologies Reference Line 4215 - Manual (Page 3)

Caution: Exposure to extremely high noise levels can
cause permanent hearing loss.
The REFERENCE LINE 4215 system is capable of producing in excess of 138db SPL at 1
meter. Continued exposure to noise levels in excess of 90db may cause permanent
hearing loss. Below is a chart of the OSHA (Occupational Safety & Health Administration)
regulations for Occupational Noise Exposure. Please note: OSHA requires hearing
protection for any work environment when the sound levels exceed those shown in Table
G-16 when measured on the A scale of a standard sound level meter at slow response.
INTRODUCTION
Thank you for purchasing ISP Technologies REFERENCE LINE 4215 active speaker
system. The REFERENCE LINE 4215 is a high output four-way active speaker system
designed to deliver HI-FI sound quality for high SPL sound reinforcement applications. The
REFERENCE LINE 4215 is a dual element line array system where each element includes
a 600-watt 15-inch woofer, dual 300-watt 8-inch midrange drivers, and a high performance,
1.75-inch polyester diaphragm neodymium high frequency compression driver. The
REFERENCE LINE 4215 has nine separate power amplifiers capable of producing
upwards of 2000 watts of power. The REFERENCE LINE 4215 requires an external digital
crossover network to provide optimized phase and frequency response at each crossover
point. The internal amplifiers are based on ISP Technologies patent pending D-CAT
(Dynamic Current Amplifier Technology) amplifier technology. The D-CAT technology is
capable of delivering extremely high output current providing an improvement in transient
response, output current, and a noticeable improvement in PUNCH. The D-CAT amplifier
technology utilizes a high performance power amplifier driver that reduces parts count and
greatly improves reliability. The D-CAT amplifiers provide improved reliability by including
short circuit and over temperature protection.
The REFERENCE LINE 4215 inputs are a combination of both ¼-inch RTS and XLR
balanced inputs. Proper connection from the internal power amplifiers to the external
processor crossover is critical to avoid sending low frequency information to the high
frequency drivers, which would cause failure of the drivers. The REFERENCE LINE 4215
cabinet is made of high quality 13 ply Baltic birch plywood with a durable spray on black
splatter finish for long life.