Velodyne HGS10BGII Powered Subwoofer – Professionally Restored – 1-Year Warranty

About

The Velodyne HGS-10BGII is a premium servo-controlled powered subwoofer developed during Velodyne’s golden era of high-performance low-frequency design. Widely respected among audiophiles and home theater enthusiasts, the HGS Series became famous for delivering exceptionally deep, accurate, and controlled bass reproduction while maintaining remarkably low distortion.

At the heart of the HGS-10BGII is Velodyne’s proprietary High Gain Servo technology, which continuously monitors cone movement and corrects distortion in real time. This advanced system allows the subwoofer to produce powerful low-frequency output with outstanding precision and musical accuracy that conventional subwoofers often struggle to achieve.

Despite its relatively compact enclosure, the HGS-10BGII is capable of delivering impressive bass extension, making it equally suitable for critical music listening and high-performance home theater systems. Its combination of speed, control, and low-frequency authority continues to make it one of Velodyne’s most desirable vintage subwoofer designs.

Why This Unit

Unlike many vintage powered subwoofers sold in unknown condition, this Velodyne HGS10BGII has been professionally restored, inspected, and tested by HQaudios.

Vintage powered subwoofers commonly suffer from aging capacitors, amplifier instability, deteriorated driver suspensions, servo circuit issues, noisy controls, and performance degradation after decades of use.

Our restoration process is designed to improve reliability and operational stability while preserving the original Velodyne performance characteristics that made this model highly respected among audiophiles.

This unit is ready to be integrated into a serious music or home theater system without the uncertainty often associated with untested vintage electronics.

Restoration & Testing

Original condition issues

• Normal cosmetic wear consistent with age
• Amplifier section required inspection and testing
• Servo control system required verification
• Driver suspension and cone assembly required evaluation
• Controls and connections required cleaning
• Overall performance required stabilization

HQaudios Restoration Process

• Inspected powered amplifier section thoroughly
• Verified servo feedback operation and stability
• Tested driver performance and cone movement
• Cleaned controls, switches, and input connections
• Inspected power supply circuitry for reliable operation
• Verified signal integrity across all functions
• Cleaned enclosure and exterior surfaces carefully
• Performed extensive low-frequency testing and listening evaluation
• Confirmed operational stability under extended use

Results after restoration

• Deep and controlled bass performance restored
• Servo feedback operation verified successfully
• Excellent low-frequency extension achieved
• Stable amplifier performance confirmed
• Improved system reliability and long-term operation

The unit has been confirmed fully functional and stable by HQaudios.

Technical Specifications

• Type: Powered Servo-Controlled Subwoofer
• Driver: 10″ High Excursion Woofer
• Amplifier Power: 1250 Watts Dynamic
• Frequency Response: 18Hz – 120Hz
• Servo System: High Gain Servo Technology
• Inputs: Line Level Inputs
• Outputs: Line Level Outputs
• Crossover: Variable Low-Pass Filter
• Phase Control: Adjustable
• Cabinet Type: Acoustic Suspension
• Finish: Black Ash / Black Cabinet
• Dimensions (W x H x D): Approx. 15″ x 15″ x 18″
• Weight: Approx. 65 lbs
• Made in USA

Suggested Pairings

The Velodyne HGS10BGII pairs exceptionally well with high-quality vintage and modern audio systems where deep, accurate bass reproduction is desired. Recommended pairings include:

• JBL L100 Series – enhanced low-frequency authority
• Klipsch Heritage Series – powerful and dynamic system integration
• B&W 600 / 700 Series – improved bass extension and control
• Yamaha Natural Sound Systems – balanced low-frequency support
• Marantz Integrated Amplifiers – musical and refined performance
• McIntosh Audio Systems – audiophile-grade low-frequency reproduction

With proper integration, the HGS10BGII delivers deep, accurate, and highly controlled bass that enhances both music listening and home theater performance without sacrificing speed or musicality. HQaudios is available to assist with system matching before purchase.

Condition

Excellent – Refurbished – fully cleaned & restored

Protection Plan

1-Year Warranty Included

Customer Service

Once your item arrives, if you have questions about how your item functions, proper settings, crossover adjustment, system integration, input selection, or basic setup, please contact us. We are happy to help you get the best performance from your vintage audio equipment.

Our customers’ satisfaction means everything to us. If there is any issue with your order, please contact us before leaving feedback or starting a return. We kindly ask for the opportunity to address any concerns and help resolve the matter to your satisfaction.

Trade-In Program

Do you have vintage audio equipment and want to upgrade to a professionally serviced unit?

If you have vintage receivers, speakers, cassette decks, reel-to-reel machines, amplifiers, subwoofers, or other classic audio equipment, please contact us for a possible trade-in deal. You only need to pay the difference between your item and ours, depending on condition, model, service needs, and current market value.

This is a great option if you want to move from an unserviced or older piece into a restored, tested, and warranty-backed unit from HQaudios.

HQaudios — High Quality Audios, Timeless Sound!

Thank you for being a valued customer, and thank you for looking.