INFINITY PFR (Pair) Powered Tower Speakers – Restored – 1-Year Warranty
Professionally Restored by HQaudios – Fully Tested – Backed by Our 1-Year Warranty.
Up for sale is a pair of Infinity Compositions Prelude PFR speakers, an innovative 4-way floorstanding loudspeaker system with an integral powered 12-inch woofer.
This model is highly regarded for its unique hybrid architecture. It combines a slim, elegant line-array column housing four 5.25-inch lower-midrange drivers, two 4-inch upper-midrange drivers, and a 1-inch soft-dome tweeter, mated to a deep base enclosure containing a powerful, integrated 12-inch active subwoofer. This design allows the PFR to deliver the precise, holographic imaging of a high-end bookshelf speaker while producing the visceral, full-range bass extension of dedicated subwoofers – without taking up additional floor space.
This pair has been professionally restored, serviced, and tested by HQaudios while preserving the original engineering and highly dynamic sonic character of the Infinity PFR.
Key Highlights
- Authentic Infinity Compositions Prelude PFR Speaker System
- Integral 12-Inch Powered Woofers with Dedicated Built-In Amplifiers
- Vertical Midrange Array with Four 5.25-Inch Lower-Midrange Drivers and Two 4-Inch Upper-Midrange Drivers per Speaker
- Extremely High Sensitivity (96dB)
- Professionally Restored and Serviced by HQaudios
- The bass-control and amplifier operating functions were inspected and tested for proper operation.
- Real-world operational and listening test performed
- Carefully packed for safe delivery
- Backed by Our 1-Year HQaudios Warranty
Sound Character
The Infinity PFR delivers a massive, full-range sonic presentation characterized by effortless dynamics and a deeply anchored low-end foundation.
Because the integral powered woofer handles frequencies below the approximately 110 Hz crossover point, the external amplifier primarily drives the midrange and high-frequency section. This results in an incredibly airy, detailed, and fast midrange with excellent vocal clarity and wide, stable stereo imaging. The bass is chest-thumping, highly adjustable via rear-panel controls, and seamlessly integrated into the rest of the frequency band.
This speaker is incredibly versatile, performing exceptionally well in critical 2-channel stereo listening environments where authoritative bass and transparent mids are required.
Cosmetic Condition
This pair is in Very Good vintage cosmetic condition, with normal signs of age and previous use consistent with large floorstanding speakers from the 1990s.
Please review all photos carefully, as they are part of the description.
- Cabinets / Columns: The tall, slim enclosures and heavy base sections are structurally solid, exhibiting minor edge wear and light scuffs.
- Grilles: The full-length cloth grilles are intact with minor snags typical of their age, fitting securely onto the columns.
- Driver Areas: The midrange cones and dome tweeters are clean, well-preserved, and free of pushed-in dust caps.
- Rear Panel / Connections: The metal amplifier plates on the rear are clean; the control knobs and speaker binding posts are in excellent shape.
HQaudios Restoration & Testing Process
Before Restoration
The Infinity PFR pair was carefully inspected upon arrival to evaluate its overall mechanical, electrical, acoustic, and cosmetic condition.
Particular attention was given to the internal active subwoofer amplifiers, power supply sections, passive crossover networks, line-array midrange drivers, and high-frequency domes.
The inspection results were used to determine the work required for this specific pair.
During Restoration
Based on the inspection results, this Infinity PFR pair was restored according to HQaudios’ technical standards while preserving its original engineering and operating characteristics.
The internal active subwoofer amplifiers and power supplies were inspected and serviced to support reliable operation of the 12-inch powered woofers. The rear-panel bass level controls were cleaned and treated to support smooth, low-noise adjustment. The passive crossover networks were inspected, and the speaker binding posts were cleaned for optimal signal transfer. The exterior cabinets and grilles were carefully cleaned.
After Restoration
Once restoration was completed, this pair underwent comprehensive functional testing under real operating conditions.
The bass-level settings, powered-woofer operation, auto-sensing function, driver output, and overall channel balance were tested. Finally, the speakers underwent an extended real-world listening test to evaluate transient impact, stereo imaging, and structural integrity at volume.
Only after completing HQaudios’ restoration and testing process was the pair approved and prepared for its next owner.
Specifications
| Specification | Details |
|---|---|
| Brand | Infinity |
| Model | Compositions Prelude PFR |
| Type | 4-Way Floorstanding Loudspeaker System with Integral Powered Woofer |
| Low Frequency Driver | 12-inch Cone (Internally powered by built-in amplifier) |
| Midrange Driver | 4 × 5.25-inch Cone Drivers/Upper Midrange: 2 × 4-inch Polypropylene-Cone Drivers |
| High Frequency Driver | 1-inch Soft Dome Tweeter |
| Nominal Impedance | 6 Ohms (Mid/High Section) |
| Recommended Amplifier Power | 10–150 Watts per Channel |
| Internal Amp Power Requirement | 120V AC (Standard Wall Outlet for Subwoofer) |
| Frequency Response | 35 Hz–20 kHz ±2 dB; -6 dB at 25 Hz |
| Sensitivity | 96 dB (1W / 1m) |
| Crossover / Network | Internal Passive Network (Mid/Highs) & Active Subwoofer Control |
| Dimensions | Approx. 7.5 × 19.5 × 54.75 in (191 × 495 × 1391 mm) |
| Weight | Approx. 78 lbs (35.4 kg) per speaker |
| Included | Pair of Infinity PFR Speakers |
| Condition | Restored / Serviced / Tested |
| Warranty | 1-Year HQaudios Warranty |
What Is Included
Pair of Infinity Compositions Prelude PFR Speakers
Original Front Grilles
Attached AC Power Cords (for internal subwoofers)
Only the items clearly shown in the photos or specifically listed in the description are included.
Video Test & Sound Demo
If you would like to see or hear this Infinity PFR pair in operation before purchase, please contact HQaudios directly.
When available, HQaudios can provide additional photos, close-up images, operational videos, and sound demonstrations.
Customers may also visit the HQaudios YouTube channel for restoration projects, product demonstrations, and listening sessions.
Suggested Pairing
Because the internal active subwoofers handle the heavy bass frequencies, the highly efficient (96dB) mid/high section of the Infinity PFR acts as a brilliant, easy-to-drive canvas for your amplifier’s tonal characteristics.
High-End Tube Amplification
Amplifier: McIntosh MC275 or Dynaco ST-70
Why it works: A truly magical pairing. The highly sensitive line-array midranges respond beautifully to the lush, three-dimensional harmonics of vacuum tubes, while the built-in solid-state subwoofers ensure the bass retains absolute grip and slam.
Classic Vintage Solid-State
Receiver/Amp: Marantz 2270 or Pioneer SX-950
Why it works: The warm, thick signature of classic 1970s solid-state receivers beautifully balances the fast, detailed highs of the soft dome tweeters, resulting in an expansive and fatigue-free soundstage.
For the best performance, ensure that all connected equipment is electrically and mechanically compatible with the Infinity PFR and properly configured before use.
Basic Use Guide
To help maintain the long-term performance of these active-bass speakers, we recommend the following:
- Power Requirement: Ensure both speakers are plugged into a standard 120V wall outlet to power the internal subwoofers.
- Amplification: Use appropriate amplification for the 6-ohm passive mid/high section; avoid pushing external amplifiers into clipping.
- Bass Adjustment: Use the rear-panel level controls to fine-tune the subwoofer output to your room’s acoustics.
- Placement: Allow adequate space around the heavy base sections to let the low frequencies breathe properly in your listening room.
- Contact HQaudios if assistance with setup, speaker connection, or system matching is needed.
Trade-In Program
Do you have vintage audio equipment you’d like to trade in?
HQaudios welcomes trade-ins on receivers, amplifiers, speakers, cassette decks, reel-to-reel decks, turntables, and other classic audio equipment.
Simply send us photos and basic information about your equipment. Our team will review the item and discuss available trade-in options.
Build Your Vintage System / Combo Discount
Looking to build a complete vintage audio system?
HQaudios can help match the Infinity PFR with compatible vintage audio components.
Save $100 when purchasing these speakers together with a qualifying restored vintage audio component from HQaudios.
Please contact us before purchase so we can confirm availability and prepare a combined offer.
Shipping & Packaging
This pair will be carefully packed by HQaudios for safe delivery. Tall, heavy floorstanding speakers require specialized care.
- Protective wrapping applied securely around the tall columns and heavy bases.
- Heavy-duty packing materials used to absorb impact.
- Extra driver, corner, and rear amplifier panel protection.
- Custom wooden crating or palletized freight shipping may be utilized to ensure safe transit of these large towers.
- Tracking information provided immediately upon shipment.
1-Year HQaudios Warranty
This pair is backed by our 1-Year HQaudios Warranty, covering normal-use functionality related to the service work performed by HQaudios.
If an issue occurs, please contact HQaudios first. Our team will help evaluate the issue and work toward an appropriate solution.
The warranty does not cover misuse, improper setup, unauthorized repair, physical damage, cosmetic wear, amplifier clipping, excessive power, incorrect wiring, incompatible equipment, or operation outside the manufacturer’s intended specifications.
Customer Service
After delivery, customers may contact HQaudios for assistance with setup, connections, equipment matching, operation, and model-specific settings.
Our team is happy to help customers use their vintage audio system correctly and confidently.
Important Note for Vintage Audio Buyers
This is vintage audio equipment, so minor signs of age may be present and are normal for equipment that has been in use for many years.
Vintage audio equipment must be connected and operated correctly. Always verify speaker impedance, amplifier compatibility, voltage configuration, and wiring before powering on the system.
HQaudios – Vintage Audio Restored with Care.
Backed by Our 1-Year Warranty.













































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