Celestion CDX1-1730 Professional Compression Driver – Restored – 1-Year Warranty

Condition: Tested, serviced and restored – Excellent sound. With over 2,000 fully serviced and certified vintage receivers/speakers delivered. HQaudios stands as one of the most reputable sources for high-quality audio units. If you’re browsing on a mobile device, scroll down and tap the Title to view the complete description.

1/ ABOUT 

The Celestion CDX1-1730 is a professional high-frequency compression driver engineered for PA systems, horn-loaded loudspeakers, and professional audio applications requiring efficient and controlled high-frequency reproduction. Designed by Celestion, a respected British loudspeaker manufacturer, the CDX1-1730 combines compact construction with strong acoustic output and reliable long-term performance.

This compression driver is known for delivering clean upper-frequency detail, articulate vocal reproduction, and dynamic transient response while maintaining excellent efficiency in horn-based systems. Its lightweight structure and modern driver design make it suitable for professional reinforcement systems, custom speaker projects, and restoration applications.

The CDX1-1730 performs especially well in systems where vocal clarity, projection, and controlled high-frequency dispersion are important. It is commonly paired with professional horn assemblies in both live sound and custom high-efficiency speaker configurations.

⚠️ Important Note – Vintage Market Risks
Used compression drivers may develop diaphragm fatigue, weakened terminals, voice coil damage, oxidation, or instability from years of heavy operation and improper storage. Many used drivers available online are sold without impedance verification or proper signal testing.

At HQaudios, every professional driver is carefully inspected, measured, cleaned, and tested to ensure stable operation and dependable long-term functionality.

HQaudios – Restored & Tested Unit
This Celestion CDX1-1730 compression driver has been professionally inspected and tested by HQaudios technicians. Impedance, diaphragm condition, terminal integrity, and overall acoustic functionality were verified before listing.

• Condition: Very Good – fully cleaned & restored
• Warranty: 1 year (repair or replacement)
• Free Support: Must be used before requesting return
• Ready to use, no further adjustment required

Why This Listing

Unlike unverified vintage units on the market, this vintage speaker driver has been restored and thoroughly tested, ensuring stable sound quality and reducing the risks associated with buying vintage equipment.

Customer Service

Once your item arrives, if you have questions about operation or setup, please contact us anytime. We are here to support you before and after purchase.

Notes

– This item is designed for the U.S. market and operates on U.S. power standards. If you are located outside the United States, please contact us before purchasing so we can help confirm compatibility for your setup.

– The actual color and appearance of the product may slightly vary due to lighting conditions, camera settings, and display differences. Some angles may not fully reflect every detail of the item. Please review all descriptions carefully and feel free to message us for clarification.

**TRADE-IN PROGRAM

If you have any vintage audio equipment (receivers, speakers, cassette decks, reel-to-reel, etc.) and want to upgrade to a serviced unit, please contact us for the best offer. You only need to pay the difference between your item and ours.

2/ SPECIFICATIONS

• Type: Compression Driver
• Power Handling: 50W
• Recommended Amplifier: 20W – 100W
• Sensitivity: N/A
• Frequency Response: N/A
• Voice Coil: 1.75″
• Diaphragm: Titanium
• Magnet Type: Ferrite
• Nominal Impedance: 8Ω
• Driver Model: Celestion CDX1-1730 / T5485A
• Mounting Type: Bolt-On
• Enclosure: Horn Driver Design
• Dimensions (W x H x D): N/A
• Weight: N/A

3/ KEY FEATURES

• Professional Celestion high-frequency compression driver design
• Clean and articulate upper-frequency reproduction
• Efficient horn-driver architecture for dynamic projection
• Excellent vocal clarity and transient response
• Compact professional-grade driver construction
• Suitable for PA systems, horn speakers, and custom audio projects
• Verified impedance measurement for operational stability
• Reliable performance for restoration or replacement applications

4/ RESTORATION & TECHNICAL PROCESS

Original condition issues

• Driver showed signs of previous professional use and storage
• General surface aging and cosmetic wear present
• Terminal condition required inspection and verification
• Electrical continuity and impedance required testing

HQaudios Restoration Process

Driver & Diaphragm Inspection

• Compression driver assembly carefully inspected
• Internal diaphragm condition evaluated
• Magnet structure and mounting surfaces verified
• Voice coil continuity checked thoroughly

Terminal & Electrical Verification

• Input terminals cleaned and tested
• Impedance measurement verified successfully
• Signal continuity confirmed
• Connection stability inspected carefully

Acoustic & Functional Testing

• Driver tested using compatible horn configuration
• High-frequency response evaluated carefully
• Vocal articulation and transient behavior verified
• Extended signal testing completed successfully

Results after restoration

• Clean and stable high-frequency performance
• Verified operational condition with proper impedance reading
• Strong vocal clarity and controlled upper-frequency response
• Excellent suitability for professional or custom horn systems
• Reliable compression driver ready for long-term use

5/ SUGGESTED PAIRINGS 

The Celestion CDX1-1730 pairs well with professional horn assemblies, PA speaker systems, and custom high-efficiency loudspeaker projects where clean high-frequency projection and vocal articulation are required.

• Professional PA Systems – dynamic and controlled treble performance
• Custom Horn Speaker Projects – efficient and articulate upper-frequency response
• Studio & Live Sound Systems – detailed vocal reproduction and projection
• Solid-State or Professional Power Amplifiers – stable and flexible compatibility

With proper horn integration and crossover design, the Celestion CDX1-1730 delivers clean, dynamic, and efficient high-frequency reproduction suitable for both professional and custom audio applications.
HQaudios is available to assist with compatibility guidance and system matching before purchase.

6/ PACKAGING & SHIPPING

Secure Packaging:

• High-density foam inserts with 5-layer corrugated cartons
• Additional internal padding and wrap for transit protection
• Double-wall outer box with corner guards and straps

Shipping Details:

• Dispatch Time: Ships within 3 business days
• Carrier: UPS Ground (tracked & insured)
• Signature Required: Yes (as buyer’s request)
• Transit Time: Typically 3–7 business days (USA)

International Shipping:

We offer global delivery through the eBay International Shipping Program. eBay handles customs, duties, and tracking.

📦 Note: Packaging may vary slightly depending on unit size or availability, but safety and protection are always our top priority.