Excellent manual, detailed, very useful! Exactly what I needed, I'd recommend it to all who need it. Although images are scanned easily readable and explicit. A valuable tool product at a price more than modest, take it with confidence and you will not regret it!
Excellent quality on these manuals. Same as having the original printed manual and incredibly useful when doing a custom install like me. Keep it up on the good work.
Text excerpt from page 1 (click to view)
Technical Manual
ERS 400/420/440
SPECIFICATIONS
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
Nominal Impedance: Power Rating: Frequency Response: Sensitivity: 4 ohms 8 to 30 watts RMS 90Hz-15kHz 85dB 1watt/1 meter
Environmental Reference Series 2-Way Speaker
PHYSICAL SPECIFICATIONS:
1x - 4" (10.1cm) IMG full-range transducer Baffle Dimensions: 7"H x 7"W" x 2-9/16"D XXXXXXXXXX XX 17.8x17.8x6.5cm Hole Size Required: 6"H x 6"W XXXXXXXXXXXXXXXXXX XX 15.2x15.2cm Baffle #760-6528 Grille #654-6631 Grille Foam Logo #965-6532 #716-5719
PRODUCTION HISTORY
Introduced in (800:1989) (820:1991) (840:1994) Discontinued (800:1991) (820:1994) (840:1998) Original Retail Price: (800:$160.00/pair) (820/840:$180.00/pair)
NOTE: ERS 400 MUST HAVE A SEPARATE INSTALLATION BRACKET
TECHNICAL INFORMATION
TWEETER #902-5032
REV A
9-98
INFINITY SYSTEMS INC., 250 Crossways Park Drive, Woodbury, New York 11797
ERS 400/420/440 Environmental Reference Series 2-Way Speaker