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GPA family of loudspeakers

An Introduction to Great Plains Audio and Troy Audio – Keeping the Altec Tradition Vibrant! by Jeff Day

12-07-2019 | By Jeff Day |

If you read my “Today’s Fresh Catch: The Great Plains Audio 802-16G Series II & 416-16B Drivers” post (HERE), you know I am pretty excited about the Great Plains Audio and Troy Audio commitment to keeping the vintage Altec tradition vibrant.

GPA family of loudspeakers

I asked our Great Plains Audio and Troy Audio friends if they would tell us a little about the past, present, and future of Great Plains Audio and Troy Audio (nee Altec), and today I received a nice overview from Santos Oropel, which I have provided for you below. Thank you, Santos!

My chance meeting with Eliseo (Troy Audio), Bill Hanuschak (Great Plains Audio), and Santos Oropel (Troy Audio) in Munich – a great group of guys!

“Great Plains Audio was formed in 1998 after the closing of the Altec Lansing factory in Oklahoma City. It was clear to Bill Hanuschak, who worked for them from 1980 until they closed, that there would be a need for someone to continue the maintenance of the large number of Altec acoustic products in use around the world.

Bill went to EVI/Telex, who had purchased Altec Lansing, with a plan to purchase all of the tooling, drawings, and equipment Altec used to build and service their loudspeakers, and to become their authorized service center for all of the Altec Lansing products that were still under warranty at that time.

In addition, Great Plains Audio assumed repair duties for all of the older, classic products that had served Altec’s customers since its inception with the parts manufactured from the original Altec tooling.

Great Plains Audio is also the source for original parts and warranty service for Altec Lansing Professional, which was a division of Altec Lansing Technologies. This includes all of their speaker products that were built through 2005.

Keep reading:


GPA Compression Driver

Today’s Fresh Catch: The Great Plains Audio 802-16G Series II & 416-16B Drivers by Jeff Day

Today’s Fresh Catch: The Great Plains Audio 802-16G Series II & 416-16B Drivers

11-17-2019 | By Jeff Day |

Being the vintage Altec enthusiast that I am – I have 3 pairs of gigantic vintage Altec loudspeakers in my modest sized home – you can imagine how excited I am by this particular “Today’s Fresh Catch”, the Great Plains Audio (nee Altec) 802-16G Series II compression drivers and the 416-16B low-frequency drivers.

GPA Compression Driver

First let me tell you how impressed I am with the quality of the packaging & packing that the Great Plains Audio drivers were shipped to me with – first rate!

It’s always a good sign when I see companies put that much thought into their packaging & packing, as I know that means they’ve also put an impressive amount of thought into their designs as well, and are proud enough of them to make sure they get to the customer in perfect condition.

Great Plains Audio 802-16G Series II compression drivers. MSRP $900 USD each.

I thought it would be handy for you if I included a copy of the fact sheet for the 802-16G Series II compression drivers.

All of my vintage Altec’s utilize 16 Ohm AlNiCo drivers, so that’s what what Bill Hanuschak sent to me for the review, but for all of you that use the 8 Ohm versions, those are also available as well.

Keep reading: https://jeffsplace.positive-feedback.com/todays-fresh-catch-the-great-plains-audio-802-16g-series-ii-416-16c-drivers/

The 415-8B is the newest loudspeaker manufactured by Great Plains Audio



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.

So here it is the brand new 415-8B.

The Biflex principle solves the problem of obtaining full frequency reproduction from a single-cone loudspeaker. It is no longer necessary to compromise between the small cone of minimum weight diameter best for HF reproduction and the larger, heavier cone, optimum for bass response. The Biflex speaker utilizes the principle of dampened cone compliances. The entire area of the speaker cone propagates the low frequencies, and the smaller central cone the high frequencies

Below 1000 Hz , the stiffness of the mid-cone compliance couples the inner and outer sections into a single moving element. Above 1000 Hz , the balanced mass of the outer section prevents the transmission of sound beyond the mid-compliance. The outer portion of the cone uncouples at this point, permitting the inner section to operate independently.

The Biflex design coupled with the famed Altec standards, produces a loudspeaker with specifications for exceeding those of many two and three-way speaker designs.

Inner cone couples to outer cone and the center cone structure vibrates to reproduce frequencies below 1000 cycles



The 415-8B employs an Alnico V magnet for maximum efficiency; the edge wound copper/clad aluminum edge-wound voice coil is situated in a deep magnetic gap to maintain proper cone linearity, this results in extremely low distortion, even during excessive cone excursion.

Although the 415 does have the extended high frequency response to 14,000 Hz alone, because of its efficiency it will match up well with other GPA components such as the 802-8G driver and our N1200-8C crossover for that extended HF output above 20 kHz.

Customers will find that the new 415-8B will maintain the same high quality and reliability as all the other products Great Plains Audio has been building for years

Each member of our team at Great Plains Audio has over 20 years of experience in building high quality audio products. We employ our combined skills and expertise to make the 415-8B one of the best loudspeakers in the world.

The Vintage Altec Experience by Jeff Day

The Vintage Altec Experience by Jeff Day

Let’s start with a short Altec history lesson 

Original text published: https://jeffsplace.positive-feedback.com/the-vintage-altec-experience/

I’ve been wanting to write an article about the “musicality magic” of vintage Altec loudspeakers for a while now, so consider this a mini-installment towards that goal, with – I hope – much more to come.

Let’s start with a short Altec history lesson.

Altec’s origins are inextricably linked to the Western Electric movie theater loudspeaker systems of the mid-1920’s.

The movie theater industry was a new and rapidly growing market in the mid-1920’s and Western Electric was busy providing loudspeakers to movie theaters across the USA.

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