SFE-812 Pro Audio Reference Speakers

SFE-812 Pro Audio Reference Speakers


Designer:
Javad Shadzi

Project Description:
The SFE-812 project utilized pro drivers to create incredibly and incredibly dynamic speaker system that meets critical audiophile standards while creating SPL’s well into the 120 decibel range for the highest level of clarity and impact.

Driver Selection:
B&C DE250 Compression Driver 294-605 x 1 each tower

Faital Pro 8FE200 8″ Mid Woofer 294-1171 x 2 each tower

Seos10 Horn

Eminence Mag 12 Subwoofer x 1 each tower

Dayton PA465S 18″ Subwoofer x 1 total 295-042

Enclosure Design:
Large enclosure, dimensions 50″ tall, 15.5″ wide and 15″ deep. Total weight 98lbs including drivers.

Extensive bracing leaving no surface more than 8″ unbraced, bracing heavily engineered and windowed to mantain maximum rigidity with minimal weight and volume displacement.

All drivers flush mounted including Seos10 horn

Enclosure Assembly:
3/4″ maple plywood construction, front baffle 1.5″ thick, only glue used, no metal in enclosure other than screws holding in drivers.

Crossover Design:
Fully active miniDSP 4×10, laptop programmable, crossover points as follows:

Tweeter – 2000hz 24db/octave
Midrange – 150hz 12db-2000hz 24db
12″ Subwoofer – 30hz 48db-150hz 12db
18″ Subwoofer – 20hz 48db-80hz 12db

Tips & Tricks:
Build thread chronicling construction at http://techtalk.parts-express.com/forum/speaker-project-gallery/1277937-seos-12-faitalpro-8-mtm-12-subwoofer-towers

About the Designer:
I own an engineering and manufacturing company for high performance automotive products, I recently rekindled my passion for speaker building and have built over 10 pair of speakers this year since Feb!

4 Comments

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  1. 1
    Jay

    These look really good. I am wondering how the miniDSP was to set up. Did you use a microphone to determine crossover points, or did you just program the frequencies based on what you wanted? I am about to start my first ever build (two 8″ woofers, one 5″ mid and a 1″ tweeter).

  2. 2
    Javad Shadzi

    Hello Jay, thanks for the question, I did play with various xo points, slopes and EQ to arrive at these points, the goal is to be able to turn these up to 11 and not have any distortion, these settings allow that and also sound incredible at lower volume levels. Look at the driver response curves initially to see where they start dropping off, especially for the tweeter you want to keep the XO point above Fs and usually well above the natural roll off of the driver. Have fun and experiment, let me know if I can help, hit me up in my build thread if you need – Thanks! Javad

  3. 4
    Javad Shadzi

    Hello Steve, I actually made the feet, the are solid maple approx 1.5″ wide x 3/4″ stock, the ends are cut at an angle and they are treated with a 1/4″ roundover. Then they are secured to the cabinet with wood glue and 1/4″ wooden dowels, glad you like them, thanks!

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