GEMA
- GEMA
- SB ACOUSTICS
SB ACOUTICS GEMA, 3way Loudspeaker Kit Pair using the SB34NRXL75-8, the SB12MNRX225-4 and the SB26STAC-C000-4.
Gema is a large 3-way speaker paying homage to the classic speaker of the 1970’s. Generous enclosure proportions fitted with large bass drivers were the bee’s knees at the time. And for good reason!
The Gema is SB's take on a retro-styled speaker, and the much loved 12″ SB34NRXL75-8 lays the foundation of a deep, well controlled and tuneful bassline. The dedicated midrange is covered from 680Hz and all the way up to 3kHz by the 4″ paper cone SB12MNRX2-25-04 which is characterized by good efficiency, low moving mass and great linearity resulting in excellent midrange clarity. To perfectly match the articulate and open midrange the top end is handed over to the 1 inch soft dome SB26STAC-C000-4 equipped with die-cast aluminium faceplate, optimised rear chamber and full copper cap.
The well braced cabinet is designed with a large slot port tuned to 28 Hz opening to the front of the speaker and a generous sealed enclosure for the dedicated midrange. We highly recommend building the speakers from high quality 18mm (or thicker) birch plywood or MDF.
A good starting point for the placement of the Gema would be a spacing of 2.5-3 meters between the speakers with generous clearance to any side and rear walls and ideally on a stand or plinth elevating the speaker about 25cm from the floor and tilted back at about 6 degrees and a slight toe in. The tweeter and midrange are intended to be on the outside, but this will depend on the room – as usual, we encourage you to experiment with speaker placement to suit your taste and listening space.
!!! CABINETS NOT INCLUDED !!!
!!! CROSSOVERS NOT ASSEMBLED !!! (additional cost for assembly)
| KIT CONTENT | |||||
| QT | PART # | ITEM | MANUFACTURER | ||
| 2 | SB26STAC-C000-4 | 26mm Textile Dome Tweeter | SB ACOUSTICS | ||
| 2 | SB12MNRX225-4 | 12cm Paper Cone Midrange | SB ACOUSTICS | ||
| 2 | SB34NRXL75-8 | 34cm Paper Cone Woofer | SB ACOUSTICS | ||
| 2 | PB680 | 6.8 mfd 400v 24x33 | SOLEN | ||
| 2 | PB1500 | 15 mfd 400v 29x45 | SOLEN | ||
| 2 | PB1800 | 18 mfd 400v 31x45 | SOLEN | ||
| 2 | PB2200 | 22 mfd 400v 34x45 | SOLEN | ||
| 2 | PB5100 | 51 mfd 400v 45x60 | SOLEN | ||
| 2 | PB4700 | 47 mfd 400v 44x60 | SOLEN | ||
| 2 | Y05A100K337 | 330 mfd 100v 25x52 (combine with 150 mfd) | SOLEN | ||
| 2 | B05A100K157 | 150 mfd 100v 22x45 (combine with 330 mfd) | SOLEN | ||
| 2 | S20.10 | .10 mH 0.8 10x19x38 | SOLEN | ||
| 2 | L16.68 | .68 mH 1.2 16x32x64 Litz | SOLEN | ||
| 2 | S18.56 | .56 mH 1.0 13x25x51 | SOLEN | ||
| 2 | L16.12 | .12mH 1.2 11x22x45 Litz | SOLEN | ||
| 2 | S123.9 | 3.9 mH 2.0 32x64x127 | SOLEN | ||
| 2 | S141.8 | 1.8mH 1.6 22x45x89 | SOLEN | ||
| 2 | S1820.0 | 20 mH 1.0 25x51x102 | SOLEN | ||
| 2 | MO1000J1R8 | 1.8 Ohms 10W | SOLEN | ||
| 2 | MO1000J1R2 | 1.2 Ohms 10W | SOLEN | ||
| 2 | AOC1600G6R8 | 6.8 Ohms 16W 2% 9x55mm | SOLEN | ||
| 8 | 322GDS | Crossover Terminal | SOLEN | ||
| 8 | CLASSIC2.5 | Tin Plated OFC 2x2.5mm (Woofer and Input) | SUPRA CABLES | ||
| 16 | CLASSIC1.6 | Tin Plated OFC 2x1.6mm (Mid and Tweeter) | SUPRA CABLES | ||
| 4 | GFD205-1614R | Female Disconnect .205" 16/14 RED | SOLEN | ||
| 4 | GFD110-1614B | Female Disconnect .110" 16/14 BLACK | SOLEN | ||
| 146 | SCE41BSC | Self Adhesive Foam Tape for Gasket | SOLEN | ||
| 8 | POLYESTER | Fiberflex 12"x42"x1.5" | SOLEN | ||
| 2 | DBPPB-CMC | Dual Binding Post Plate for CMC Connectors | SOLEN | ||
| 4 | 858-LU | Binding Post Gold 8x38mm | SOLEN (CMC) | ||
| 8 | OXSOCKET6X3/4 | Hex Socket Screw #6x3/4" Black (Terminal Plate) | SOLEN | ||
| 16 | OXSOCKET8x1 | Hex Socket Screw #8x1" Black (Mid and Tweeter) | SOLEN | ||
| 16 | OXSOCKET10X1.25 | Hex Socket Screw #10x1.25" Black (Woofer) | SOLEN | ||
| NOM DU FICHIER | ACTION |
|---|---|
| Gema-Cabinet-Drawing.pdf | Télécharger |
| Gema-Crossover-schematic.pdf | Télécharger |