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🔊 M&K SURROUND-550THX — THX SELECT — CONSECUTIVE SERIAL NUMBER L/R CLASSIC MILLER & KREISEL HOME THEATER ENGINEERING
The M&K Surround-550THX was purpose-designed as a dedicated surround-channel loudspeaker for high-performance multichannel home theater systems.
Miller & Kreisel built an exceptional reputation among serious audio and home-theater enthusiasts through loudspeakers engineered around accuracy, dynamic capability and controlled dispersion rather than conventional mass-market design.
The Surround-550THX represents that philosophy particularly well. Rather than being a standard bookshelf speaker adapted for rear-channel use, it was engineered specifically to create the spacious, enveloping sound field required from dedicated surround LUCASFILM THX SELECT CERTIFIED
Both speakers retain their original rear identification plates displaying the Lucasfilm THX Select certification.
THX-certified home-theater systems were developed around demanding performance standards intended to reproduce movie soundtracks with appropriate dynamics, tonal balance, clarity and spatial presentation.
The Surround-550THX was designed specifically for this environment and remains an excellent choice for enthusiasts assembling a vintage M&K multichannel TRUE LEFT & RIGHT SURROUND PAIR
This is not simply a pair of identical conventional speakers.
M&K manufactured dedicated LEFT and RIGHT versions of the Surround-550THX, and this listing includes the correct matching configuration:
LEFT SURROUND SPEAKER — Serial No. 594880
RIGHT SURROUND SPEAKER — Serial No. 594881
Even more importantly, these speakers carry CONSECUTIVE SERIAL NUMBERS.
That makes this an especially attractive original pair for collectors, M&K enthusiasts or anyone restoring a period-correct Miller & Kreisel home-theater M&K HIGH-FREQUENCY PRISM DESIGN
One of the Surround-550THX\'s most distinctive engineering features is M&K\'s specialized High-Frequency Prism concept.
The unusual curved perforated-metal grille is not simply a cosmetic styling element. The tweeter orientation and grille geometry were engineered together to influence high-frequency dispersion and help create the broad, enveloping presentation desirable from surround speakers.
This specialized approach is also one reason M&K produced dedicated Left and Right versions of the speaker.
The result is a surround loudspeaker engineered for its specific role rather than a conventional speaker simply positioned behind the FACTORY SPECIFICATIONS
Model: Surround-550THX / SUR-550
Manufacturer: Miller & Kreisel Sound Corporation — M&K Sound
Configuration: Dedicated Left & Right surround speakers
Nominal Impedance: 8 Ohms
Frequency Response: 80 Hz – 20 kHz ±3 dB
Minimum Amplifier Power: 25 Watts RMS
Recommended Amplifier Power: 50–200 Watts RMS
Maximum Power: 200 Watts RMS unclipped peaks
Connection: Red/Black speaker binding posts
Certification: Lucasfilm THX Select
Country of Manufacture: MADE IN USA — CULVER CITY, CALIFORNIA ERA
The original rear labels identify these speakers as products of Miller & Kreisel Sound Corporation of Culver City, California and proudly state MADE IN USA.
M&K became one of the important names associated with high-performance home theater, professional monitoring and subwoofer technology, making surviving examples from this period increasingly interesting to enthusiasts of classic American audio equipment.
Both original factory identification labels remain TESTED & WORKING
Both Surround-550THX speakers have been TESTED AND ARE WORKING PROPERLY.
The original curved perforated-metal grilles remain installed, both M&K badges are present, the rear binding posts remain intact and the factory Left/Right identification labels are clearly readable.
Cosmetically, the speakers show signs consistent with previous ownership.
Most notably, there is visible chipping/wear to the upper front cabinet corner areas. These imperfections have been intentionally photographed in detail and do not affect operation.
Please examine the high-resolution photographs carefully for the exact cosmetic condition of both EXACT PAIR — NO STOCK PHOTOS
Every photograph in this listing shows the ACTUAL M&K Surround-550THX speakers being offered for sale.
No generic or stock photographs are used.
We photographed the cabinets, curved metal grilles, M&K badges, drivers, connection terminals, cosmetic imperfections, factory identification labels, dedicated Left/Right designations and consecutive serial numbers so you can see exactly what you are purchasing.
EVERYTHING SHOWN IS INCLUDED.
YOU WILL RECEIVE THE EXACT PAIR WHY BUY FROM MIDENCE & CO.?
At Midence & Co., vintage electronics and audio equipment are carefully selected, inspected, tested and documented before being offered for sale.
🔍 Equipment is carefully inspected and tested.
📸 Every listing uses photographs of the actual item — never generic stock photos.
📝 Cosmetic imperfections and important details are clearly documented.
🔊 Vintage audio equipment is handled with particular attention to drivers, cabinets, grilles and connection terminals.
📦 Speakers and delicate electronics are carefully protected for transportation.
We believe quality electronics deserve a second life, and our goal is to deliver equipment that arrives exactly as SHIPPING & HANDLING
This vintage M&K speaker pair will be carefully prepared for shipment with particular attention given to the drivers, curved metal grilles, cabinet corners, M&K badges and rear connection terminals.
Each speaker will be individually protected with appropriate cushioning, kraft paper and stretch wrap to prevent contact between the cabinets during transportation.
Additional protection will be placed around the vulnerable cabinet corners and front grille assemblies.
The speakers will then be securely packed in a heavy-duty shipping box with sufficient protective material to minimize movement and absorb impacts during transportation.
FRAGILE identification will be applied to the package.
Shipment will be insured for 100% of the purchase value.
FedEx Home Delivery / Ground is our preferred shipping service when available.
Signature confirmation is available upon request.
