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mini econowave-inspired desktop speakers

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  • #1

    mini econowave-inspired desktop speakers

    I am fond of efficient speakers powered by low-wattage amplifiers. Any thoughts on an econowave-inspired desktop speaker for use with the PC? I am in love with the sound of the B&C DE250 horn driver and was thinking of matching it up with a B&C 6NDL38 6-1/2" woofer. It looks like it will do well in a smallish box of around .25 cu ft. I'd like to use a mini-dsp and actively crossover with 2 topping amps. The pair would only play down to 80Hz or so where I have a 10" Dayton sub under my desk for the lows. I am uncertain of the horn but was considering the Faital Tractrix as I want to keep the width under 8" to save deskspace.

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    https://www.parts-express.com/B-C-DE250-8-1-Polyimide-Horn-Driver-8-Ohm-2-3-Bolt-294-605?quantity=1
    B&C DE250-8 1" Polyimide Horn Driver 8 Ohm 2/3-BoltB&C's DE250 1" high frequency compression driver features smooth and accurate response. Its low mass polyimide diaphragm and optimized ceramic magnet assembly allow high sensitivity and low distortion up to 18 kHz. Popular with professional users as well as many discriminating "high efficiency" home audio enthusiasts, the B&C Speakers DE250 is considered one of the most listenable high performance 1" HF drivers available.Specifications: • Power handling: 60 watts RMS/120 watts program above recommended crossover of 1.6 kHz/12 dB slope • VCdia: 1.7" • Impedance: 8 ohms • Frequency response: 1,000-18,000 Hz • SPL: 108.5 dB 1W/1m • Dimensions: 4.7" diameter x 2.4" depth • Net weight: 4.6 lb. • Replacement diaphragm available.

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    https://www.parts-express.com/B-C-6NDL38-6-1-2-Neodymium-Woofer-294-646?quantity=1
    B&C 6NDL38 6-1/2" Neodymium WooferB&C developed the 6NDL38 6-1/2" cast frame neodymium woofer/midrange for high output compact speaker systems. The rubber half-roll cone surround and long copper voice coil provide high excursion capability, and an aluminum demodulation ring reduces distortion.

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    https://www.parts-express.com/Dayton-Audio-RSS265HF-4-10-Reference-Series-HF-Subwoofer-4-Ohm-295-460?quantity=1
    Dayton Audio RSS265HF-4 10" Reference Series HF Subwoofer 4 OhmAs with the rest of the Reference Series, the main focus of the Dayton Audio RSS265HF 10" subwoofer is ultra-low distortion. Second, third, and intermodulation distortion are kept extremely low by utilizing three short-circuit paths within the motor structure. A durable aramid fiber spider and extensive venting throughout provide quiet and uniform excursion. The black anodized cone, thick rubber surround, and custom basket give this Dayton Audio driver a unique, high-end look. Choose the High Fidelity (HF) version for home systems when you are looking for clean, low bass and are not restricted by speaker cabinet size.The Dayton Audio RSS265HF-4 is used in the following kit:Dayton Audio 10" Reference Series HF Subwoofer and Starter Enclosure PackageIncluding the Dayton Audio RSS265HF-4 10" Reference subwoofer and a matching subwoofer starter kit this package makes it easy to build your own custom DIY subwoofer with minimal tools. You just need to make the top, bottom, sides, and back using all straight cuts with no tricky dadoes or rabbets required to complete your own ultra-low distortion compact subwoofer.VIEW KIT

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    https://www.parts-express.com/FaitalPRO-STH100-80-x-70-Elliptical-Tractrix-Horn-1-2-Bol-294-1040?quantity=1
    FaitalPRO STH100 1" 80 x 70 Elliptical Tractrix Horn 2-BoltThe STH100 80° x 70° elliptical tractrix horn from FaitalPRO loads 1" compression drivers down to 1,400 Hz with an extended frequency response that reaches all the way up to 20,000 Hz. The narrower vertical beamwidth is useful for minimizing floor and ceiling bounce. Smooth, aluminum construction is used for extreme durability. Made in Italy.Specifications: • Throat diameter: 1" • Driver mounting: 2/3-bolt • Recommended minimum crossover point: 1,400 Hz • Overall dimensions: 7.09" W x 4.72" H x 3.38" D, Cutout: See Manuals/Resources for cutout information.


    If anyone is interested, my current desktop speakers are very simple, a 5-1/2" silverflute with a peerless BC25SC06-04 tweeter and a 1st order crossover and the same 10" Dayton sub. Efficient, cheap, and sound very good. Currently, powered by a now-discontinued Dayton 2.1 plate amp.

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    https://www.parts-express.com/Peerless-BC25SC06-04-1-Textile-Dome-Tweeter-264-1028?quantity=1
    Peerless by Tymphany BC25SC06-04 1" Textile Dome TweeterSmooth-sounding compact soft dome tweeter with high output and response past 20 kHz. Neodymium motor, heatsink fins, and round faceplate. .

    Silver Flute W14RC25-08 ohm 5-1/2" Wool Cone
    https://www.madisoundspeakerstore.com/approx-5-woofers/silver-flute-w14rc25-08-ohm-5-1/2-wool-cone/
    Silver Flute W14RC25-08 5-1/2" Wool Cone Woofer - 8 ohms Features include rubber surround and robust cast metal frame

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    https://www.parts-express.com/Dayton-Audio-MCA2250E-2.1-Channel-Class-D-Amplifier-300-771?quantity=1
    Dayton Audio MCA2250E 2x22W + 50W 2.1 Channel Class D Plate AmplifierDayton Audio created the MCA2250E 2.1-channel plate amplifier for the speaker builder looking to build a custom computer sound system, desktop monitoring system, or space-limited home theater system.The feature-packed MCA2250E includes everything that you need in an amplifier to make system integration quick and simple: independent level controls, stereo RCA line-level and 3.5 mm inputs, signal sensing auto-on, active 150 Hz, 12 dB/octave satellite speaker high-pass filter, and an adjustable 40 to 240 Hz, 12 dB/octave subwoofer low-pass filter.Up to 50 watts RMS are available for the subwoofer, and 22W x 2 for the satellite speakers. A set of 5-way binding posts offer plug-and-play satellite speaker connection, while a set of 24" long, 16 AWG subwoofer wires are provided on the rear of the plate amplifier for internal connection to a subwoofer. 115 VAC to 230 VAC world-compatible power input.Subwoofer Amplifier Specifications: • Minimum speaker impedance: 4 ohms • Power output: 50 watts RMS @ 4 ohms • THD: Less than 0.3% @ rated power • S/N ratio: 90 dB @ rated power • Variable low pass frequency: 40~240 Hz, 12 dB/octave • Bass boost: +3 dB centered at 63 Hz • 0~5 dB gain adjustment controlSatellite Amplifier Specifications: • Minimum speaker impedance: 8 ohms • Power output: 22 watts RMS x 2 @ 8 ohms • Frequency response: 150 Hz – 20 kHz • THD: Less than 0.3% @ rated power • S/N ratio: 90 dB @ rated powerPlate Amplifier Features and Specifications:• 5-way binding post satellite speaker terminals • 24" 16 AWG subwoofer output wires • Overall dimensions: 5-7/8" W x 10-7/16" H x 4-1/2" D • Enclosure cutout: 4-5/8" W x 9-1/4" H



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  • #2
    I like the way you are thinking. High efficiency paper cone = lower energy usage = cool! (no pun intended, ha ha).

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    • #3
      I really like your idea.

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      • #4
        That's a really loud desktop setup!
        Isn't it about time we started answering rhetorical questions?

        Paul Carmody's DIY Audio Projects
        Twitter: @undefinition1

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        • #5
          I have two of those 2.1 amps. I used one for many years in an 8" TangBand sub with various satellites as a PC 2.1 system. A few years ago I made a pair of speaker stands that put the satellites off the desk. Very glad I did that.

          My current PC 2.1 is a Dayton 8" sub kit using their 250 watt DSP plate amp and gobs of power for the satellites. That DSP amp is worth a look. You won't need much watts for your satellites.

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          • #6
            I have a B&C DE250 behind a STH100 and really like it.

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