Infinity Reference Standard Delta


Main Details
Maker Infinity Brand Arnie Nudell Designer
Additional Model ID IRS Delta
Form Factor Floorstanding
Signal Path Analog Hardware
Made In United States
Date Produced 1987
Frequency Response 28Hz-45kHz ±2 dB
Notes *EMIT (ElectroMagnetic Induction Tweeter)
**EMIM (ElectroMagnetic Induction Midrange)

Identical to the IRS Gamma except the servo control was not included. The Delta could be upgraded to the Gamma with the optional purchase of the electronic control unit and the speakers were so marked "Delta/Gamma" to that purpose.
Additional Specifications
Supertweeter SEMIT-k PN 902-3465
Tweeter (Front) EMIT-k* PN 902-3721
Tweeter (Rear) EMIT-k* PN 902-3721
Midrange EMIM** Rev. C PN 902-0012C
Midbass L-EMIM PN 902-3431
Woofer 12" IMG Cone (x2) PN 902-3054
Sensitivity 87dB/W/m
Impedance 4Ω
Crossover Points 100Hz, 750Hz, 4.5kHz, 10kHz
Horizontal Dispersion ±2dB in 180°
Finish Santos Pau Ferro
Connector: Binding Post (Universal)
Servo-Control Cable
Connector: DIN
Parameter: Super Tweeter Level
Control Type: Rotary Pot
Parameter: Tweeter Level
Control Type: Rotary Pot
Parameter: Upper Midrange Level
Control Type: Rotary Pot
Parameter: Midbass Coupler Level
Control Type: Rotary Pot
Parameter: Servo
Control Type: Toggle Switch
Parameter: Bass Extension
Control Type: Toggle Switch


Login or Register to post a comment