KLH Model Seven (KLH 7) Vintage Speaker Pair – Restored – 1-Year Warranty

$1,699

KLH Model Seven – vintage acoustic-suspension loudspeaker from KLH of Cambridge, Massachusetts
2-way, 3-driver design – one woofer and two tweeters in each cabinet
8-ohm nominal impedance with a high-frequency level control
All original KLH drivers – cones and diaphragms in good condition
Wood-veneer cabinets refinished in their original color
New grille cloth on both grilles
Professionally inspected, serviced and tested by HQaudios
Backed by our 1-Year HQaudios Seller Warranty

1 in stock

SKU: 1LILC0747 Categories: SPEAKERS, KLH, Refurbished

Description
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KLH Model Seven (KLH 7) Vintage Speaker Pair – 2-Way, 3-Driver

Professionally Restored by HQaudios – Inspected & Tested – Backed by Our 1-Year Warranty

KEY HIGHLIGHTS

KLH Model Seven – vintage acoustic-suspension loudspeaker from KLH of Cambridge, Massachusetts

2-way, 3-driver design – one woofer and two tweeters in each cabinet

8-ohm nominal impedance with a high-frequency level control

All original KLH drivers – cones and diaphragms in good condition

Wood-veneer cabinets refinished in their original color

New grille cloth on both grilles

Professionally inspected, serviced and tested by HQaudios

Backed by our 1-Year HQaudios Seller Warranty

PRODUCT OVERVIEW

The KLH Model Seven is a vintage acoustic-suspension loudspeaker from KLH, the Cambridge, Massachusetts company co-founded by Henry Kloss and known for its sealed-box speaker designs.

Each cabinet uses a 2-way, 3-driver layout – one woofer and two tweeters – with an 8-ohm nominal impedance and a high-frequency level control that lets you tune the treble to your room.

This pair has wood-veneer cabinets refinished in their original color and new grille cloth, and is ready to anchor a classic vintage listening system.

HQAUDIOS RESTORATION & TESTING

Before Restoration

This KLH Model Seven pair was carefully inspected upon arrival to evaluate its mechanical, electrical, and cosmetic condition.

Each cabinet, cone, surround, and spider was checked for originality and for glue joints that had loosened or shifted with age. Every driver was tested by hand for voice-coil rub – a scratching noise or a stiff, binding cone indicates a shifted or heat-damaged voice coil. The DC resistance of each driver was measured and checked for expected values and pair consistency. The crossover networks were examined for bulging or leaking capacitors, each capacitor was measured against its original value (within 10% tolerance), and the high-frequency level controls, wiring and terminals were inspected.

Inspection Findings: The wood finish of the cabinets showed scratches. The grilles and the speaker terminals were in good, complete condition. The grille cloth was glued tightly to the cabinets and could not be removed without damage, so the first measurements were taken from the rear of the cabinets. During the first signal test, one woofer produced a buzz in the bass range.

The inspection results were used to determine the work required for this specific pair.

During Restoration

Based on the inspection results, this KLH Model Seven pair was restored according to HQaudios’ technical standards while preserving its original engineering and voicing.

Cabinets: The scratched wood finish was treated and refinished while keeping the original color of the cabinets.

Grilles: New grille cloth was fitted to both grilles.

Drivers: The drivers were removed from the cabinets and re-tested, including the woofer that produced a buzz during the first signal test. After re-testing, the buzz was eliminated and both woofers play cleanly.

Original Drivers: All drivers retain their original cones and diaphragms, which are in good condition.

Cleaning & Detailing: The drivers, crossovers and terminals were cleaned, and the cabinets and grilles were cleaned and detailed.

After Restoration / Final Testing

Once restoration was completed, the pair underwent comprehensive testing under real operating conditions.

Phase Check: Driver polarity was verified using a phase-reversal check to ensure both speakers play in correct phase.

Level Controls: The high-frequency level controls were checked on both speakers.

Listening Test: The pair underwent an extended real-world listening test with a wide range of music to confirm dynamics, tonal balance, and stereo imaging.

Final QC: Only after completing HQaudios’ restoration and testing process was the pair approved and prepared for its next owner.

CONDITION

Technical Condition

Drivers: Original KLH woofer and two tweeters in each cabinet – removed and re-tested, no buzz

Crossover Networks: Inspected; capacitors measured against original values

High-Frequency Level Controls: Checked on both speakers

Terminals: Original, complete and in good condition

Phase: Polarity checked on both speakers

Cosmetic Condition

Cabinets: Wood finish refinished in the original color

Grilles: New grille cloth on both grilles

Overall Presentation: A clean, presentable vintage pair. Please review all photos for exact cosmetic details.

Drivers Re-tested

Crossover Capacitors Measured

Phase Checked

Final Listening Test Completed

SPECIFICATIONS

Brand: KLH

Model: Model Seven (KLH 7)

Type: 2-way, 3-driver acoustic-suspension loudspeaker

Drivers (each cabinet): 1 woofer + 2 tweeters

Nominal Impedance: 8 Ohms (per rear label)

Controls: High-frequency level control (per rear label)

Dimensions (each): 26.5 x 21.5 x 13 (inch)
Year: 1959-1960

Finish: Wood-veneer cabinets / light beige grille cloth

WHAT IS INCLUDED

1 Pair of KLH Model Seven Speakers

2 Grilles with new grille cloth, as shown in the listing photos

Only the items specifically listed above are included. No stands are included; any stands or bases shown in the photos are for display only. Speaker cables and other accessories are not included.

SHIPPING & PACKAGING

Your vintage audio equipment will be professionally packed by HQaudios using protective materials appropriate for its size, weight, and construction. Large or heavy items may be palletized and shipped by freight when required for safer transportation.

HQaudios Professional Shipping and Packaging

Please contact us before purchase for the most current availability information.

1-YEAR WARRANTY & CUSTOMER SUPPORT

Your purchase is backed by our 1-Year HQaudios Seller Warranty (this is an HQaudios warranty, not a KLH manufacturer warranty). Our team provides support before and after your purchase. If you have questions about setup, operation, compatibility, or your order, please contact HQaudios for assistance.