In addition to parts and service for older Altec Lansing loudspeakers, Great Plains Audio manufactures an ever-increasing number of finished loudspeaker products for use in professional and audiophile systems.
Great Plains Audio continues the Altec tradition of manufacturing individual loudspeaker components of the highest quality and outstanding performance characteristics. Whether you need horns, high-frequency compression drivers, low-frequency loudspeakers, two-way loudspeakers, or crossovers, GPA has what you need! Our loudspeaker components are excellent companions to existing Altec Lansing products too, and are also popular as replacements when the originals have been damaged or lost.
Great Plains Audio 3000 Series Low Frequency Transducers
Our 3000-series of Low Frequency Loudspeakers were specifically designed for sound reinforcement applications, and have also found their way into home theatre and many other types of systems. Outstanding performers, they offer extremely linear performance at low distortion within their rated bandwidth.
(Each LF speaker in the 3000 Series is designed for a specific application.)
For smaller, full-range applications, the GPA Model 3124 Low-Frequency Loudspeaker is an excellent choice. With it’s heavy, cast 12″ frame and it’s low free-air resonance of 26 Hz, it is an excellent performer for smaller systems that require smooth low-frequency response with minimal distortion.
For smaller applications that require higher SPL output, GPA offers the Model 3127 Low-Frequency Loudspeaker. Capable of handling large amounts of acoustic power for a speaker it’s size (12″), the 3127 is an excellent choice for use in smaller sound reinforcement systems requiring excellent low-frequency response with minimal distortion at higher sound pressure levels.
One of the best sounding 16″ Woofers we make, the GPA Model 3154 Low-Frequency Loudspeaker is a superb loudspeaker. It’s low, free-air resonance of 25 Hz allows it to perform exceedingly well in tuned vented boxes with extreme naturalness and minimal distortion. It is a great choice for use in medium-to-large sound reinforcement systems requiring excellent low-frequency response, and for use in high-quality home audio systems.
One of our most popular woofers for use in direct radiator enclosures is our Model 3156 Low-Frequency Loudspeaker. Built on our massive 16″ frame, it is a real powerhouse. Incredibly efficient, it performs equally well in nearly all venues, from large sound reinforcement systems for houses of worship, stadiums, arenas, and high-end music systems, all the way to home theatre systems where high-output with low distortion are required.
Our 18″ Model 3184 Low-Frequency Loudspeaker is, quite simply, an fantastic woofer. Designed for use as a sub-woofer, when used in our Model 8184 Enclosure, it produces a whopping 117 dB of SPL with a mere 300 watts of audio power. Yet, with all that output, it is amazingly linear and exhibits very low distortion. Great for large sound systems and home audio systems where performance takes priority over space limitations.
Co-Axial Two-way Loudspeakers
In 1944, Altec Lansing released what is possibly the most famous loudspeaker ever made by anyone – the 604 DUPLEX®. A 15″ co-axial loudspeaker, it revolutionized the studio monitoring world, and became the world standard by which all others of it’s type that would follow for the next 50 years. Nothing sounds more natural and lifelike than a properly operating 604! We are proud to offer the 604 in two different versions, and it’s new 12-inch baby brother, the Model 212-8A.
Our latest version of the world famous 604-series is the Model 604-8H-III. It’s a refined version of our 604-8H-II, this model boasts a different high-frequency horn than the previous models. Our new exponentially-flared radial horn provides excellent upper end response not achieved in any previous version of the 604. When installed in a properly designed enclosure, its’ performance is, to say the least, impressive.
Our newest 604 is a 15 in. (381 mm), low frequency loudspeaker and a 1 in. (25 mm), high frequency compression driver, both mounted to a single 16 in. (406 mm) diameter frame. Each component is structurally, magnetically, electrically, and mechanically independent of the other. The low frequency loudspeaker cone is attached to a 3.0 in. (76 mm) diameter, edge-wound, copper-ribbon voice-coil and a 4.4 lbs. (2.0 kg) Alnico V magnet (which produces a gap flux density of 1.3 T). The high frequency compression driver features a 1.2 lbs. (0.544 kg) Alnico V magnet (which produces a gap flux density of 1.55 T), and a 1.75 in. (45 mm) diameter, edge-wound aluminum-ribbon voice-coil.
The newest addition to our family of two-way loudspeakers is the Model 212-8A 12″ Loudspeaker. Differing from the 604-series, which uses two separate magnetic assemblies mounted together, the 212-8A uses one large magnet for both high and low frequency sections. This method of manufacture not only reduces material costs, it actually improves the performance of the two by reducing magnetic flux interference.
The 415-8B is the newest loudspeaker manufactured by Great Plains Audio
This project was inspired by Mr. Jean Hiraga who is well known in the high-end world for his crossover designs, redesigns and modification of loudspeakers and amplifier.
After building successful speaker systems using used Altec 415’s he contacted Great Plains Audio with the idea of make them again.
AlNiCo Classic Series- Low Frequency Drivers
In response to the numerous requests that we have received from all over the world, Great Plains Audio is now manufacturing transducers with AlNiCo magnets. Since models made with these same materials were last produced many years ago, we refer to the models in this group as our Classic Series.
Our model 414-8B (16B) is a 12 in. (305 mm) low frequency loudspeaker. Because of its size, our 414-8B (16B) loudspeaker is ideal for use in moderately dimensioned sound reinforcement and high-fidelity applications.
This loudspeaker features a structurally reinforced, die-cast, aluminum frame. The frame’s 8 mounting bolt slots will accept a 0.25 in. (6 mm) diameter bolt or smaller, allowing the loudspeaker to be attached to almost any secure surface by either a front mounting or rear mounting method.
Also featured is a 1.8 lbs. (0.8 kg) AlNiCo V magnet, which produces an at-rest gap flux density of 0.9 T. Another feature is the 3 in. (76 mm) diameter, edge-wound, copper-ribbon voice-coil.
Our model 416-8B (16B) is a 15 in. (381 mm) low frequency loudspeaker. This model’s characteristic performance, including extremely smooth response and extraordinary linearity, makes it ideal for use in a wide-range of sound reinforcement and high fidelity applications.
This loudspeaker features a structurally reinforced, die-cast, aluminum frame. The frame’s 8 mounting bolt slots will accept a 0.25 in. (6 mm) diameter bolt or smaller, allowing the loudspeaker to be attached to almost any secure surface by either a front mounting or a rear mounting method.
Also featured is a 2.44 lbs. (1.1 kg) AlNiCo V magnet, which produces an at-rest gap flux density of 1.1 T.
Our 416-8C Low Frequency Loudspeaker is a reintroduction of another famous Altec design found in the famous A-7 Voice of the Theatre® System. This loudspeaker has long been regarded as the finest sounding 16′′ woofer ever made. The GPA 416-8C uses a massive 4.875-pound FerriteV magnet, which provides 11,000 gauss of flux density, an edgewound copper ribbon voice coil.
Great Plains Audio is pleased to reintroduce one of the finest low-frequency loudspeakers ever built, the Model 515-C Series Low-Frequency Loudspeaker. The Model 515-C is part of GPA’s new Classic Series of loudspeakers, all of which are hand-made, incorporating precision manufacturing practices, a distinctive paint scheme, and featuring the superb sonic performance that can only be achieved through the use of massive AlnicoV magnetic assemblies.
The 516-8SW is part of a new generation of woofers designed at Great Plains Audio. The woofer is built with a structurally reinforced diecast frame and a Alnico magnet structure coupled with a high power voice coil providing low distortion even at high power levels.
The frequency response is rated from 30Hz to 2 kHz with a power rating of 500 watts program material. The free air resonance will be 25 Hz. Pink
noise sensitivity will be 95dB at 1 watt and 1 meter.
High Frequency Drivers
Our high-frequency compression drivers exhibit smooth, natural reproduction without the self-induced distortion found in most other manufacturer’s products. All GPA HF Compression Drivers can be mounted to any Altec Lansing High-Frequency Horn, or to one of those we provide.
Our 802-8G (16G) Series II is a small format [1 in. (25 mm) diameter throat exit] high frequency compression driver, featuring a 1.2 lbs. (0.54 kg) AlNiCo V magnet, which produces an at-rest gap flux density of 1.525 T. It also features a 1.75 in. (45 mm) diameter, edge-wound, aluminum-ribbon voice-coil.
902-8/16A -Series of high frequency compression drivers are designed to give excellent audio reproduction over a wide frequency range with extremely high efficiency. When used with constant-directivity, sectoral, or other appropriate horns, the 902-series HF Drivers provide uniform response to the upper range of human hearing.
Our 288-8H (16H) is a large format [1.4 in. (36 mm) diameter throat exit] high frequency compression driver, featuring a 3.4 lbs. (1.54 kg) Alnico V magnet, which produces an [at-rest] gap flux density of 2.05 T. It also features a 2.8 in. (71 mm) diameter, edge-wound, copper/clad aluminum-ribbon voice-coil.
The Great Plains Audio Model N604-8A is a 12-dB/octave dual-section passive crossover network having a center frequency of 1,500 Hertz. It is designed specifically to provide smooth response from our Model 604-8H-III Loudspeaker throughout its bandwidth. This combination results in a speaker system that is ideal for use in home theatre and high-quality audiophile systems, recording studios, and professional sound system installations.
The Great Plains Audio Model 19 is a 12-dB/octave, dual-section, passive crossover network, with a center frequency of 1,200 Hertz. This crossover is designed to replace the original crossover used in the famous Altec Lansing Model 19 speaker system. It may also be used with some of our Great Plains Audio products to create your own 2-way speaker system designs.
The Great Plains Audio Model N1200-8C is a 12-dB/octave, dual-section, passive crossover network, with a center frequency of 1,200 Hertz. This crossover is designed to replace the original crossover used in the famous Altec Lansing Model 19 speaker system. It may also be used with some of our Great Plains Audio products to create your own 2-way speaker system designs.
Diaphragm original GPA for 604/802/804/806/808/902/909/605 -16 ohms. Manufactured using original Altec tools, materials and expertise.