Infinity RS IIIA Floorstanding Speakers – Professionally Restored – 1-Year Warranty

Professionally Restored by HQaudios - Inspected & Tested - Backed by Our 1-Year Warranty

1. KEY HIGHLIGHTS

• Infinity Reference Standard RS IIIA – 3-way floorstanding loudspeakers, sold as a pair
• Two 10-inch polypropylene woofers per speaker
• Infinity Polydome midrange and EMIT planar tweeter
• New foam surrounds on all four woofers
• All original Infinity drivers – cones and diaphragms in good condition
• Oak side panels with fluted edges, black front baffles and brown grille cloth
• Backed by our 1-Year HQaudios Warranty

2. PRODUCT OVERVIEW

The Infinity Reference Standard RS IIIA is a 3-way floorstanding loudspeaker produced by Infinity from 1982 to 1984.

Each speaker combines 10-inch polypropylene woofers with Infinity's Polydome midrange and EMIT planar tweeter, crossed over at 600 Hz and 4 kHz.

This pair has been inspected, serviced, and tested by HQaudios, including new foam surrounds on all four woofers. The photos show the actual pair you will receive.

3. HQAUDIOS RESTORATION & TESTING

Before Restoration

This Infinity RS IIIA pair was carefully inspected upon arrival to evaluate its mechanical, electrical, and cosmetic condition.

Each cabinet, cone, surround, and spider was checked for originality and for glue joints that had loosened or shifted with age. Every driver was tested by hand for voice-coil rub – a scratching noise or a stiff, binding cone indicates a shifted or heat-damaged voice coil. The DC resistance of every driver was checked against its nominal impedance. The crossover networks were examined for bulging or leaking capacitors, each capacitor was measured against its original value (within 10% tolerance), and the wiring and terminals were inspected.

Inspection Findings: The foam surrounds on all four woofers (two per speaker) had to be replaced.

The inspection results were used to determine the work required for this specific pair.

During Restoration

Based on the inspection results, this Infinity RS IIIA pair was restored according to HQaudios' technical standards while preserving its original engineering and voicing.

• Woofers: New foam surrounds were fitted to all four woofers, two in each speaker.
• Reassembly: The speakers were reassembled and tested after the woofer work.
• Drivers: All drivers retain their original cones and diaphragms, which are in good condition.
• Cleaning & Detailing: The drivers, crossover boards and terminals were cleaned, and the cabinets and grilles were cleaned and detailed.

After Restoration / Final Testing

Once restoration was completed, the pair underwent comprehensive testing under real operating conditions.

• Phase Check: Driver polarity was verified using a phase-reversal check to ensure both speakers play in correct phase.
• Listening Test: The pair underwent an extended real-world listening test with a wide range of music to confirm dynamics, tonal balance, and stereo imaging.
• Final QC: Every pair must pass HQaudios’ final quality-control check before it is approved for sale.

4. CONDITION

Technical Condition

• Woofers: 10-inch polypropylene woofers with new foam surrounds, working on both speakers
• Midrange: Polydome midrange drivers working on both speakers
• Tweeters: EMIT planar tweeters working on both speakers
• Drivers: Checked for voice-coil rub and DC resistance
• Crossovers: Inspected; capacitors measured against original values
• Phase: Polarity checked on both speakers

Cosmetic Condition

• Cabinets: Oak side panels with fluted edges and black front baffles
• Grilles: Brown grille cloth with Infinity badge
• Overall Presentation: Restored vintage loudspeakers, not factory-new. Please review all photos carefully – they show the actual pair being offered.

Summary:

• Inspected
• New Woofer Foam Surrounds
• Capacitors Measured
• Phase Checked
• Final Listening Test Completed
• Final Technical QC Completed

5. SPECIFICATIONS

• Brand: Infinity
• Model: Reference Standard RS IIIA
• Type: 3-Way Floorstanding Loudspeaker
• Low-Frequency Drivers: 10-inch polypropylene woofers (two per speaker on this pair)
• Midrange Driver: Polydome
• High-Frequency Driver: EMIT planar tweeter
• Frequency Response: 35 Hz – 32 kHz (±3 dB)
• Nominal Impedance: 4 – 8 ohms
• Recommended Amplifier Power: 50 – 200 watts per channel RMS
• Crossover Frequencies: 600 Hz, 4 kHz
• Dimensions: 48 × 18 × 7.75 Inches (121.9 × 45.7 × 19.7 cm)
• Years Produced: 1982 – 1984

6. WHAT IS INCLUDED

• 1 Pair of Infinity RS IIIA Speakers
• 2 Grilles

Only the items specifically listed above are included. Any other equipment shown in the photos is for display only and is not included.

7. SHIPPING & PACKAGING

Your vintage audio equipment will be professionally packed by HQaudios using protective materials appropriate for its size, weight, and construction. Large or heavy items may be palletized and shipped by freight when required for safer transportation.

8. 1-YEAR WARRANTY & CUSTOMER SUPPORT

Your purchase is backed by our 1-Year HQaudios Seller Warranty (this is an HQaudios warranty, not a Infinity manufacturer warranty). Our team provides support before and after your purchase. If you have questions about setup, operation, compatibility, or your order, please contact us through Reverb Messages.