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Shadzi T3S Compact 2-Way Bookshelf Speaker Kit with Knock-Down Enclosure

Parts ExpressPart # 300-7192
The T3S Compact 2-Way Bookshelf Speaker Kit delivers reference-grade performance in a small, easy-to-assemble package. Designed by renowned DIY speaker builder Javad Shadzi, it features premium drivers and a carefully tuned crossover for stunning detail and balance. With a solid MDF cabinet and deep low-frequency extension, the T3S brings high-end sound to any room.

Key Features

  • Reference-grade performance for incredible clarity, detail, and musicality
  • Exceptionally flat ±3 dB on-axis response from 70 Hz to 20 kHz
  • Wide and consistent off-axis dispersion for an immersive soundstage
  • CNC-machined ¾" MDF knock-down cabinet with rabbeted joints and internal bracing
  • Compact ported design for clean low-distortion bass extension down to 40 Hz
  • Custom crossover with air core inductors polypropylene capacitors and low-inductance resistors
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Overview

Shadzi T3S Compact 2-Way Bookshelf Speaker Kit with Knock-Down Enclosure

T3S Compact 2-Way Bookshelf Speaker Kit with Knock-Down Enclosure

Achieve reference-grade clarity and detail with the T3S Compact 2-Way Bookshelf Speaker Kit, designed by well-known DIY speaker builder Javad Shadzi. Its meticulously tuned crossover and premium drivers deliver ultra-low distortion, expansive dispersion, and surprisingly deep bass that belies its compact size. A custom PCB and top-quality crossover components preserve every nuance of your music from input to output. The intuitive knock-down enclosure and clear, step-by-step guide make assembly quick and approachable, so you can focus on listening rather than troubleshooting. When complete, the T3S stands as a testament to both Shadzi’s exacting design and your own skilled craftsmanship.

Thanks to well controlled on and off-axis performance, the T3S is ideal for both nearfield and traditional listening environments. The wide dispersion and tonal consistency across angles create a large, immersive soundstage with stable imaging. Whether you’re seated dead center or off to the side, the speaker maintains clarity and balance without sounding dull or beamy. This makes it a versatile choice for small rooms, desktop use, or even home theater surrounds.

About the Drivers

At the heart of the T3S is a driver pairing selected for clarity, precision, and musicality. The Peerless XT25TG30-04 tweeter offers outstanding off-axis dispersion thanks to its dual ring radiator design, delivering high-frequency detail that remains consistent across a wide listening area. Complementing it is Dayton Audio’s RS150-4 Reference Series woofer, a 6" aluminum cone driver known for its low distortion and natural response. Together, they achieve a smooth ±3 dB response from 70 Hz to 20 kHz, ensuring a balanced and revealing listening experience.

About the Crossover

To make assembly accessible to all skill levels, the T3S includes a custom crossover circuit board, high-end components, and a clear, step-by-step manual. Air core inductors, polypropylene capacitors, and low-inductance resistors are chosen for low distortion and transparent performance. The crossover is set at 2,000 Hz, using a third-order filter on the tweeter and a second-order filter on the woofer. Careful optimization keeps the drivers in phase through the crossover region for smooth, coherent sound. The kit contains every part needed to build one complete speaker—just add tools and time, and you’ll have a compact monitor that delivers audiophile performance.

About the Enclosure

Despite its compact size, the T3S delivers bass extension that surprises. Its bass reflex alignment and carefully tuned flared port allow it to reach below 50 Hz with gentle rolloff, making it a capable full-range option for music listening without a subwoofer. The flared port design minimizes turbulence and eliminates audible port noise, maintaining clean bass even at higher playback levels.

The enclosure is precision-cut from ¾" MDF using CNC machining for perfect panel alignment. Assembly is straightforward thanks to rabbeted joints and an included center brace that locks the front, back, and side panels into position for superior rigidity. This bracing, combined with the included ½" Sonic Barrier acoustic damping material, minimizes enclosure resonances and internal reflections for a cleaner, more controlled sound.

As you move from unboxing to final driver installation, the intuitive knock-down design and simple step-by-step instructions keep the build smooth and frustration-free. Once assembled, the T3S reveals reference-grade detail—with crisp highs, warm mids, and surprisingly deep bass that belies its compact footprint. Whether you’re enjoying subtle acoustic passages or powerful orchestral crescendos, its accuracy, detail, and precise imaging will draw you into the music. More than just a speaker kit, the T3S stands as a testament to Javad Shadzi’s meticulous engineering and your own DIY craftsmanship.

T3S Frequency Response 0° - 90°

T3S Impedance

Kit Components:

Part #QtyDescription
027-4291Dayton Audio DMPC-7.5 7.5uF 250V Polypropylene Capacitor
027-2121Dayton Audio PMPC-1.5 1.5uF 250V Precision Audio Capacitor
027-348122uF 100V Non-Polarized Capacitor
257-0321Dayton Audio AC20-40 0.40mH 20 AWG Air Core Inductor Coil
257-0511Dayton Audio AC201-4 1.4mH 20 AWG Air Core Inductor Coil
006-71Dayton Audio DPR10-7.0 7 Ohm 10 Watt Precision 1% Audio Grade Resistor
006-21Dayton Audio DPR10-2.0 2 Ohm 10 Watt Precision 1% Audio Grade Resistor
295-3721Dayton Audio RS150-4 6" Reference Woofer 4 Ohm
264-10161Peerless XT25TG30-04 1" Dual Ring Radiator Tweeter
101-2596 ft.16 AWG Stranded OFC Twisted Pair Speaker Cabinet Hookup Wire Red/Black
081-436125-Pack #8 x 3/4" Pan Head Deep Thread Black Screws
260-5201Sonic Barrier 1/2" Acoustic Foam w/PSA 18" x 24"
091-12451Dayton Audio BPA-38G HD Binding Post Pair Gold
260-4761Port Tube 1-7/8" ID x 5-5/8" L Flared
-10Cable Ties 12" Black
-50.110" (16-14) Female Disconnect
-50.205" (16-14) Female Disconnect
-1Shadzi T3S Reference Speaker Kit Crossover Printed Circuit Board
-1Shadzi T3S Bookshelf Speaker Kit Knock-Down Enclosure

Specifications:

  • Power: 60 Watts RMS/120 Watts Max
  • Tweeter: Peerless by Tymphany XT25TG30-04 1" Dual Ring Radiator Tweeter
  • Woofer: Dayton Audio RS150-4 6" Aluminum Cone Reference Woofer 4 Ohm
  • Frequency response: 45 - 40,000 Hz
  • Impedance: 4 Ohm
  • Sensitivity: 84 dB 1W/1m
  • Dimensions: 11.5" H x 8" W x 11" D

Note: The T3S 2-Way Bookshelf kit comes with nearly everything needed to build one complete speaker. Including knock-down enclosure, drivers, crossover components, terminals, damping material, wires, and screws.

Product Details

BrandParts Express
Part Number300-7192
UPC848864079431
Weight15.73

Product Specifications

Cabinet OptionsUnfinished/Unassembled
ColorUnfinished
Configuration2-way
Input Rating4 ohm
Speaker TypeBookshelf
Woofer Diameter6"

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