The Infinity IRS Gamma / Delta — Vintage Titans with Ribbons & Rumble. These aren’t just speakers—they’re audio monuments. The Infinity IRS Delta / Gamma are towering, ribbon-loaded legends from the golden era of high-end hi-fi. Built in the 1980s under the wizardry of Arnie Nudell, these are the kind of speakers that make jaws drop, amps sweat, and listeners forget to blink.
Professionally restored by Aural HiFi in Denver Colorado.
*There is a bit of discoloration (pictured) on one of the side cabinets that we were unable to remove. But as the cabinets are angled backwards, it's definitely not something that is noticeable from the listening position.
- Production
- 1987-92
- Condition
- 9/10
- Serial No.
- G000466 / G000467
- Orig. MSRP
- $11,950
- Restoration
- New bi-polar electrolytic crossover capacitors - 9 per speaker
- Replaced broken cement wirewound resistor in one speaker
- Re-glued loose components, as needed
- Verified all wiring and connections
- Reconed all 4 woofers
- New DIN cables for Servo Control Unit
- Factory Specs
Drivers (per channel):
Woofers: Four 12” Polypropylene/Graphite
Mid Bass: 2 L-EMIMs
Midrange: 1 EMIM
Tweeters: 1 EMIM/front 1 EMIT/rear
Super-Tweeters: 1 SEMIT
Nominal Impedence: 4 Ohms
Finish: Santos pau ferro
Dimensions: (WxDxH)
Woofer module: 16 1/2” x 14 1/2” x 64 3/4” (41.91 x 36.83 x 164.47cm)
Mid/tweeter module: 17” x 1” x 64 3/4” (43.18 x 2.54 x 164.47cm)
Base footprint: 18” x 17” (45.72 x 43.18cm)
Weight:
Woofer module: 140 lbs (63.64kg)
Mid/tweeter module: 75 lbs (34.09kg)
Special Features: Monster cable ARC wire Solen caps Wonder caps
Frequency Response: 15Hz to 45KHz ±2 dB
Crossover Frequencies: 100Hz, 750Hz, 4500Hz,10kHz
Passive Crossover Controls:
Super tweeter level Tweeter level Upper midrange level
Electronic Crossover Controls:
High pass filter Low pass filter
Bass contour Low frequency phase Low frequency level
Mid/Tweeter Amplifier 75-300 watts/ch RMS
REQUIREMENTS:
Bass Amplifier Requirements: 150-500 watts/ch RMS
- The History of Infinity
- Founded in 1968 by Arnie Nudell, John Ulrick and Cary Christie, Infinity has produced home and mobile audio products by employing innovative materials such as neodymium magnets, mylar diaphragms, and polypropylene cones. The company's first product was the Servo-Statik speaker system which, as the name implies, consisted of electrostatic main panels and a revolutionary servo-controlled woofer based on the bomb guidance systems Nudell was developing at the time for defense contractor Litton....
[ Read More ]
- Packing
- We'll deliver this piece in its original factory box, so you can be sure it will be protected just as Infinity intended.
- Shipping
- This piece ships to the contiguous United States for a flat rate of $380, which includes our packaging and our insurance. Of course, we'll ship anywhere in the world, just drop us a line and we'll give you an estimate – even if you're just curious.
- Stock No.
- 9037229687005
The Infinity IRS Gamma / Delta — Vintage Titans with Ribbons & Rumble. These aren’t just speakers—they’re audio monuments. The Infinity IRS Delta / Gamma are towering, ribbon-loaded legends from the golden era of high-end hi-fi. Built in the 1980s under the wizardry of Arnie Nudell, these are the kind of speakers that make jaws drop, amps sweat, and listeners forget to blink.
Professionally restored by Aural HiFi in Denver Colorado.
*There is a bit of discoloration (pictured) on one of the side cabinets that we were unable to remove. But as the cabinets are angled backwards, it's definitely not something that is noticeable from the listening position.
Production
1987-92
Condition
9/10
Serial No.
G000466 / G000467
Orig. MSRP
$11,950
Restoration
- New bi-polar electrolytic crossover capacitors - 9 per speaker
- Replaced broken cement wirewound resistor in one speaker
- Re-glued loose components, as needed
- Verified all wiring and connections
- Reconed all 4 woofers
- New DIN cables for Servo Control Unit
Factory Specs
Drivers (per channel):
Woofers: Four 12” Polypropylene/Graphite
Mid Bass: 2 L-EMIMs
Midrange: 1 EMIM
Tweeters: 1 EMIM/front 1 EMIT/rear
Super-Tweeters: 1 SEMIT
Nominal Impedence: 4 Ohms
Finish: Santos pau ferro
Dimensions: (WxDxH)
Woofer module: 16 1/2” x 14 1/2” x 64 3/4” (41.91 x 36.83 x 164.47cm)
Mid/tweeter module: 17” x 1” x 64 3/4” (43.18 x 2.54 x 164.47cm)
Base footprint: 18” x 17” (45.72 x 43.18cm)
Weight:
Woofer module: 140 lbs (63.64kg)
Mid/tweeter module: 75 lbs (34.09kg)
Special Features: Monster cable ARC wire Solen caps Wonder caps
Frequency Response: 15Hz to 45KHz ±2 dB
Crossover Frequencies: 100Hz, 750Hz, 4500Hz,10kHz
Passive Crossover Controls:
Super tweeter level Tweeter level Upper midrange level
Electronic Crossover Controls:
High pass filter Low pass filter
Bass contour Low frequency phase Low frequency level
Mid/Tweeter Amplifier 75-300 watts/ch RMS
REQUIREMENTS:
Bass Amplifier Requirements: 150-500 watts/ch RMS
The History of Infinity
Founded in 1968 by Arnie Nudell, John Ulrick and Cary Christie, Infinity has produced home and mobile audio products by employing innovative materials such as neodymium magnets, mylar diaphragms, and polypropylene cones. The company's first product was the Servo-Statik speaker system which, as the name implies, consisted of electrostatic main panels and a revolutionary servo-controlled woofer based on the bomb guidance systems Nudell was developing at the time for defense contractor Litton....
[ Read More ]
Packing
We'll deliver this piece in its original factory box, so you can be sure it will be protected just as Infinity intended.
Shipping
This piece ships to the contiguous United States for a flat rate of $380, which includes our packaging and our insurance. Of course, we'll ship anywhere in the world, just drop us a line and we'll give you an estimate – even if you're just curious.
Stock No.
9037229687005
