ALTEC Model 17 604-8G Coaxial Vintage Speakers – Professionally Restored – 1-Year Warranty

Professionally Restored by HQaudios – Fully Tested – Backed by Our 1-Year Warranty.

Up for sale is a beautiful pair of Altec Model 17 604-8G coaxial vintage speakers, professionally inspected, serviced, and tested by HQaudios. These speakers have been prepared for reliable use and are ready to deliver the highly efficient, dynamic, and detailed sound that made Altec coaxial systems highly respected among collectors and music lovers.

At the heart of the Model 17 is the Altec 604-8G Duplex driver, a large-format coaxial design that combines a 15-inch low-frequency cone with a centrally mounted high-frequency compression-driver horn section. This architecture is one of the defining elements of the Model 17 and a major part of its appeal among vintage Altec collectors.

This pair is ideal for buyers who appreciate authentic vintage audio, exceptional efficiency, natural musical presentation, and the peace of mind of purchasing from a trusted restoration-focused seller.

Key Highlights

• Authentic Pair of ALTEC Model 17 Speakers
• Built Around the ALTEC 604-8G Duplex Coaxial Driver
• 15-Inch Large-Format Coaxial Architecture
• Integrated Low- and High-Frequency Driver System
• High-Efficiency, Dynamic ALTEC Sound
• 604-8G Low- and High-Frequency Sections Individually Tested
• Left-to-Right Performance Compared After Restoration
• Professionally Inspected and Serviced by HQaudios
• Fully tested under real listening conditions
• Beautiful vintage cabinet presentation
• Carefully packed for safe shipment
• Backed by Our 1-Year HQaudios Warranty

Sound Character

These Altec Model 17 604-8G speakers offer the highly efficient, immediate, and dynamic presentation associated with classic Altec coaxial designs. The 604-8G Duplex driver combines a 15-inch low-frequency cone with a coaxially mounted compression driver and sectoral horn, providing the efficiency, coherence, and dynamic presentation associated with classic Altec systems.

With their high sensitivity and wide frequency range, these speakers pair especially well with low-powered tube amplifiers and other quality vintage amplification, while delivering excellent dynamics and a lifelike presentation.

Cosmetic Condition

The speakers are in Excellent vintage cosmetic condition. The cabinets show normal signs of age and previous use, such as minor marks, light scratches, small veneer imperfections, or corner wear as shown in the photos.

The grille cloths, badges, cabinet corners, back labels, and input terminals are shown clearly in the photo section. Please review all photos carefully, as they are part of the description.

Overall, this is a very presentable pair that will display beautifully in a vintage audio system.

HQaudios Restoration & Testing Process

Before Restoration

• The ALTEC Model 17 604-8G speakers were carefully inspected upon arrival to evaluate the condition of the cabinets, 604-8G coaxial drivers, crossover networks, internal wiring, terminals, and overall construction.

• Each speaker was individually tested to identify any issues affecting driver performance, crossover operation, tonal balance, or stereo consistency.

• The cabinets and exterior components were inspected, and the required cleaning and cosmetic restoration were completed while preserving the original vintage character.

During Restoration

• The cabinets were carefully cleaned and detailed while preserving their original vintage appearance.

• The 604-8G coaxial drivers were inspected and tested to verify proper operation of both the low-frequency and high-frequency sections.

• The crossover networks were inspected and serviced to ensure proper frequency distribution between the low-frequency and high-frequency sections.

• Internal wiring, solder joints, terminals, and connections were inspected and serviced based on the condition of this pair.

• Aging electronic components that no longer met specifications were replaced during restoration.

• All accessible connections and driver mounting points were inspected and secured to ensure reliable mechanical and electrical operation.

After Restoration

• Both ALTEC Model 17 604-8G speakers were individually tested following the restoration work.

• The low-frequency and high-frequency sections of the 604-8G coaxial drivers were verified for proper operation.

• The crossover networks were tested to ensure proper frequency distribution and consistent performance.

• Left and right channel balance was checked to ensure consistent performance between the pair.

• Extended listening tests were performed to evaluate the speakers’ dynamic performance, tonal balance, clarity, and overall musical presentation.

• Final inspection was completed to ensure the speakers were operating reliably before being approved for sale.

Specifications

Suggested Pairing

The ALTEC Model 17 604-8G speakers pair exceptionally well with classic vintage receivers, integrated amplifiers, and high-quality vintage audio components.

• Classic Marantz System
Marantz 2270 Receiver
ALTEC Model 17 604-8G Speakers

• Vintage Pioneer System
Pioneer SX-1250 Receiver
ALTEC Model 17 604-8G Speakers

• Classic Sansui System
Sansui 9090DB Receiver
ALTEC Model 17 604-8G Speakers

• Classic McIntosh System
McIntosh C28 Preamplifier
McIntosh MC2205 Power Amplifier
ALTEC Model 17 604-8G Speakers

• Classic Yamaha System
Yamaha CR-2020 Receiver
ALTEC Model 17 604-8G Speakers

• Classic Two-Channel System
Vintage Integrated Amplifier
Turntable + Phono Stage
ALTEC Model 17 604-8G Speakers

For the best performance, position the ALTEC Model 17 604-8G speakers properly in the listening room and adjust their placement and toe-in according to the room and listening position. Their efficient coaxial design makes them an excellent match for a wide range of classic vintage amplification.

Video Test & Sound Demo

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

You may also visit our YouTube channel to hear sound demos of vintage audio equipment restored and prepared by HQaudios.

Trade-In Program

Do you have vintage audio equipment that you would like to trade in? We may accept receivers, amplifiers, speakers, cassette decks, reel-to-reel decks, turntables, and other classic audio gear.

Please contact us with photos and details of your equipment. We will be happy to review and discuss possible trade-in options.

Combo Discount

Looking to build a complete vintage audio system? Ask us about pairing these speakers with a restored receiver, amplifier, turntable, cassette deck, or reel-to-reel deck.

We may be able to offer a combo discount when multiple items are purchased together.

Shipping & Packaging

We understand that vintage speakers require careful handling. This pair will be professionally packed with strong protection to help ensure safe delivery.

• Careful protective wrapping
• Strong boxing and internal cushioning
• Extra protection for cabinet corners and grille areas
• Tracking information provided after shipment
• Freight shipping may be used for large or heavy speakers

For large speakers, local pickup may also be available by appointment.

1-Year HQaudios Warranty

This item is backed by our 1-Year HQaudios Warranty covering proper electronic and functional operation under normal home use.

Our goal is to provide a confident and comfortable buying experience. If you have any questions after receiving your item, please contact us first. We are here to help.

Warranty does not cover misuse, physical damage, unauthorized repair, damage caused by incorrect connection, improper amplifier matching, or shipping damage after delivery.

Important Note for Buyers

Vintage audio equipment may show normal age-related cosmetic wear. We do our best to describe each item clearly and provide detailed photos so you can buy with confidence.

Please review all photos, read the full description, and contact us with any questions before purchase. We are happy to help you confirm whether this pair is the right match for your system.

HQaudios – Vintage Audio Restored with Care.
Professionally Restored – Fully Tested – Carefully Packed – 1-Year Warranty.