MCINTOSH C28 Vintage Stereo Preamplifier – Professionally Restored – 1-Year Warranty

This listing is for a McIntosh C28 vintage stereo preamplifier, professionally inspected, serviced, and tested by HQaudios.
The C28 is one of McIntosh’s most iconic solid-state preamplifiers, celebrated for its exceptional build quality, remarkable versatility, and timeless audio performance. Carefully restored for dependable long-term operation, this classic preamplifier preserves the smooth, natural sound and legendary craftsmanship that have made the C28 a favorite among audiophiles and collectors for decades.

The preamplifier has been fully tested under real listening conditions and is ready to pair with your favorite power amplifier, turntable, tuner, tape deck, or modern digital source.

Key Highlights

• Professionally inspected and serviced by HQaudios technicians
• Fully tested for clean, stable, and reliable operation
• Legendary McIntosh solid-state preamplifier design
• Multiple phono and line-level inputs for system flexibility
• Controls cleaned and treated for smooth, noise-free operation
• Carefully packed for safe worldwide delivery
• Backed by our 1-Year HQaudios Warranty

Specifications

Sound Character

The McIntosh C28 delivers the classic McIntosh sonic signature with exceptional warmth, transparency, and effortless musicality. Its low-noise circuitry reproduces vocals with remarkable realism, while maintaining a smooth, detailed top end and a solid, well-controlled low-frequency foundation. The result is a natural and engaging presentation that remains fatigue-free even during extended listening sessions.

Designed to complement both vintage and modern McIntosh power amplifiers, the C28 offers outstanding channel separation, precise imaging, and excellent dynamic range. Its superb phono stage makes it an exceptional choice for vinyl enthusiasts, while its flexible connectivity easily accommodates a complete analog or hybrid audio system.

Cosmetic Condition

The preamplifier is in excellent vintage cosmetic condition with only light signs of age consistent with careful ownership. The iconic McIntosh glass front panel, aluminum trim, and original controls remain exceptionally well preserved. The unit has been professionally cleaned and detailed while maintaining its authentic vintage appearance. Please review all photos carefully, as they are part of the description.

• Front glass / faceplate: Excellent condition with clean glass, sharp lettering, and well-preserved aluminum trim
• Knobs and switches: Original McIntosh controls in excellent condition with smooth, precise operation
• Top cover / cabinet: Well-preserved with minimal signs of normal vintage use
• Illumination / indicators: Bright, clear, and fully functional
• Rear panel: Clean, complete, and well maintained with all RCA connectors, terminals, and controls in excellent condition

HQaudios Restoration & Testing Process

Before Restoration

• After decades of service, the McIntosh C28’s power supply, preamplifier circuits, phono stage, line-level signal path, input selector, volume and tone controls, switches, and illuminated front panel required careful inspection before restoration began.
• For this C28, HQaudios placed particular attention on the condition of the power supply, phono preamplifier section, line-stage circuitry, controls, switches, potentiometers, RCA input/output connections, tape monitor circuits, and internal wiring.
• The preamplifier circuits, signal path, phono equalization stage, tone control network, illuminated front panel, and all front-panel controls were also carefully evaluated to determine the preamplifier’s overall operating condition before restoration started.

During Restoration

• Based on the inspection results, this C28 was restored according to HQaudios’ technical standards while preserving the engineering and performance characteristics that have made this model one of McIntosh’s most respected vintage preamplifiers.
• The power supply, preamplifier section, phono stage, and signal path were cleaned, inspected, serviced, and adjusted to restore stable and reliable performance. Controls, switches, and connectors were carefully cleaned to eliminate noise and ensure smooth operation.
• Phono inputs, auxiliary inputs, tape monitor circuits, channel balance, tone controls, output levels, and front-panel functions were tested and adjusted based on inspection results.
• The power supply, signal path, and internal circuit boards were inspected to support stable and reliable operation. Components that did not meet technical specifications were addressed based on inspection and testing results, while critical solder joints were reinforced to improve operational stability.
• After the technical restoration was completed, the exterior was professionally cleaned and detailed to preserve the C28’s original appearance while respecting the authentic character of vintage McIntosh equipment.

After Restoration

• Once restoration was completed, this C28 underwent comprehensive functional testing under real operating conditions.
• Phono and line-level operation, channel balance, output levels, tone controls, illumination, and all inputs and outputs were thoroughly tested.
• Finally, the unit underwent several hours of continuous listening tests through a complete vintage audio system to evaluate sound quality, operational stability, and overall real-world performance.
• Only after successfully meeting HQaudios’ restoration and testing standards was this McIntosh C28 approved and prepared for its next owner.

Video Test & Sound Demo

Please contact us directly if you would like to hear a video test of this unit before purchase.
We are happy to provide additional video, sound demo, or photos upon request.

Suggested Pairing

The McIntosh C28 works beautifully with a wide range of restored vintage systems.

Classic McIntosh System
McIntosh MC2105 Power Amplifier
McIntosh XR5 Speakers

McIntosh Reference System
McIntosh MC2505 Power Amplifier
Klipsch La Scala Speakers

Audiophile Vintage System
Thorens TD-124 Turntable
Yamaha NS-1000M Speakers

Studio Monitor System
Revox B77 Reel-to-Reel Tape Deck
JBL 4333A Studio Monitors

High-End Vintage System
McIntosh MC2300 Power Amplifier
Altec Model 19 Speakers

British-Style System
Linn Sondek LP12 Turntable
Tannoy Berkeley Speakers

For the best result, connect the C28 to a properly matched power amplifier using high-quality interconnect cables and pair it with well-maintained vintage source components for optimum performance.

Combo Discount

Save $100 when purchasing this preamplifier together with a qualifying pair of speakers or another restored vintage audio component from HQaudios.

Please contact us before purchase so we can confirm availability and prepare a combined offer.

Trade-In Program

If you have vintage audio equipment such as receivers, amplifiers, speakers, cassette decks, or reel-to-reel tape decks and would like to upgrade to a restored unit, please contact us.

HQaudios may accept trade-ins toward your purchase depending on the item, condition, and shipping location.

Shipping & Packaging

This preamplifier will be professionally packed by HQaudios for safe delivery. Vintage audio components are delicate, so we take extra care to protect the glass faceplate, knobs, corners, rear terminals, and internal structure during shipment.

• Carefully wrapped and protected
• Heavy-duty box and protective packing materials used
• Extra protection around faceplate, knobs, and corners
• Tracking provided after shipment
• Signature may be required for delivery

1-Year HQaudios Warranty

This unit is backed by our 1-Year HQaudios Warranty covering normal-use functionality related to the service work performed by HQaudios.

If you experience an issue, please contact us first. We are committed to helping our customers and will work with you to resolve the problem in a fair and reasonable way.

The warranty does not cover misuse, improper setup, unauthorized repair, shipping damage caused after delivery, cosmetic wear, or damage from incompatible equipment.

Customer Service

Once your item arrives, if you have questions about setup, power-amplifier connection, turntable connection, source connections, switch settings, or general operation, please contact us.
We are happy to help you get the best performance from your vintage audio system.

Important Note for Vintage Audio Buyers

This is a vintage audio component, and minor cosmetic signs of age should be expected.
We do our best to describe and photograph each item accurately. Please review all photos and ask any questions before purchase.

Your satisfaction is important to us. Please contact us first if you need assistance after delivery.