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 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

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SV101783.JPG
SV101783.JPGOpen Baffle Speakers - Front5786 viewsI had a very large sheet of 18mm particle board which had been sitting around for years. Also a pair of titanium domed tweeters and 2" domed mid-range surplus. What to do with them? With the addition of a pair of cheap but very robust 10" woofers and a 2nd order Xover (600Hz & 3.5kHz) I thought a may knock-up a pair of OBs.

I allowed one day to build these from scratch and with the assistance of some massive angle brackets and a few meters of darcon here is the result. That total height and depth of the speakers is covered in two thick layers of darcon leaving only the woofer rears bare.

The woofers are stiff and require many hours of play to get them to full performance. But the speakers have an excellent sound stage bright mids and highs. Bass is OK but not deep.
Aug 30, 2008
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Jordan-JX92S-Sealed-Speaker.jpgJordan JX92S in Sealed Speaker Box6011 viewsThe Jordan JX92S Fullrange transducer in a sealed (acoustic suspension) enclosure. The box volume is 5.2L and a camphor burl veneer was used for the finish. I use these with no baffle step correction whatsoever and are mated with an 8" subwoofer from av123.

I am thinking of adding the Aurum Cantis ribbon tweeter to these

Related Project: DIY Jordan JX92S Sealed Bookshelf Speakers
Aug 30, 2008
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Jordan-JX92S-Transmission-Line-Loudspeaker_.jpgJordan JX92S in Transmission Line Loudspeaker Enclosure6097 viewsJordan JX92S Fullrange Driver in a Transmission-Line Loudspeaker enclosure. The veneers is Yew Wood with a Tung Oil finish. The speaker box was constructed using 25 mm thick Baltic Birch plywood.

Related Project: DIY Jordan JX92S ML-TL Speaker
Aug 30, 2008
DIY-HiVi-SP10-Subwoofer.jpg
DIY-HiVi-SP10-Subwoofer.jpgDIY HiVi SP10 Subwoofer5839 viewsDIY subwoofer using the HiVi SP10 10" driver in a vented (bass reflex) enclosure. A O-Audio 500 Watt plate amplifier was used. See the DIY HiVi SP10 Subwoofer Project page for full details.Aug 28, 2008
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DIY-HiVi-Home-Theatre-Speakers.jpgHiVi Home Theater Speakers5468 viewsDIY HiVi home theater speakers. See the project pages for full details.

- DIY 3-Way HiVi Tower Loudspeakers
- DIY HiVi Center Channel Speaker
- DIY HiVi SP10 Subwoofer Project
Aug 28, 2008
DIY-HiVi-Tower-Loudspeakers.jpg
DIY-HiVi-Tower-Loudspeakers.jpgDIY HiVi Tower Loudspeaker 5538 viewsSee the HiVi 3-way tower loudspeaker project page for full details of this speaker. Uses the HiVi F8 woofers, HiVi F5 mid-woofers and HiVi SD1.1A tweeters. Crossover is 2nd order at 500 Hz and 4000 Hz.Aug 28, 2008
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DIY-HiVi-Center-Channel.jpgDIY HiVi Center Channel Speaker5522 viewsDIY HiVi Center Channel Speaker using the HiVi F5 midbass driver and the HiVi SD1.1A tweeter. The crossover is 2nd order and at 4kHz.Aug 28, 2008
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Main_-_Copy.JPGLarge mains Speaker using the Lambda 12 TDs drivers 6907 viewsAt 2 foot square and 5 foot tall and 200 lbs. each, these mains produce some of the finest music I have ever heard. I've installed 4 Eminence 15" passive radiators in each cabinet resulting in a tuning frequency of 23 hz. Aug 24, 2008
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DSC00006_-_Copy.JPGDual stacked dual driver SoundSplinter subwoofers6868 views5 cu ft subwoofers with the SoundSplinter 15" drivers and 4- AE 15" flat passive radiators in each cabinet. I have them stacked or co-located to act as a single subwoofer. These subs model out to 13 hz at 1000 watts. Each subwoofer has a 1450 watt pro amplifier with the Reckhorn B-1 bass management system to control all frequency duties.Aug 24, 2008
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New_Set-up_-_Copy.JPGCompleted home theater/living room set up6514 viewsFull range, DIY home theater system, 4 amplifiers, 16-15" passive radiators, and a lot of pride of ownership!Aug 24, 2008
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sm-Mains_final_Crossover.jpg3-Way Crossover6365 viewsCrossover for my main speakers with twin Lambda 12 TDs mid woofers, 4 passive radiators, 2 scan speak mids, and HIVI research RT2II tweeterAug 24, 2008
Jordan-JX92S-Bass-Reflex-Speakers.jpg
Jordan-JX92S-Bass-Reflex-Speakers.jpgSmall Bass Reflex Speakers with Jordan JX92S Drivers6148 viewsA pair of small vented (bass reflex) bookshelf speakers. A single Jordan JX92S fullrange driver is used per loudspeaker. The Jordan is much better than Fostex drivers at producing bass and it does not need an expensive tube amplifier.Aug 23, 2008
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DSC_0168.jpgS-5 Electronics K-12M at Northern Californial DIY Event5661 viewsHere the S-5 Electronics K-12 Tube Amp is on display at a Northern Californial DIY Event.Aug 21, 2008
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AMPVIEW.jpgFinished K-12M Tube Amp Kit6363 viewsThe finished S-5 Electronics K-12 Tube Amplifier Kit.Aug 21, 2008
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AMPTILT.jpgS5 Electronics K-12M Tube Amp Kit - Side View5447 viewsSide view of the K-12M Tube Amp Kit showing the circuit board underneath and transformers and tubes above.Aug 21, 2008
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AMPWOOD.jpgWood Frame for Tube Amp Kit5335 viewsBubinga and Walnut wooden frame finished with Tung Oil.Aug 21, 2008
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AMPBOTOM.jpgS5 Electronics K-12M Tube Amp Kit - underside5110 viewsUnderside view of top plate. This tube amp is built from an S-5 Electronics K-12 Tube Amplifier Kit.Aug 21, 2008
PhonoInside.JPG
PhonoInside.JPGPhono Preamp Ki.3519 viewsThe cct. brd was assemble and the ABS plastic case drilled ready for assemble. ABS is a very hard plastic to drill. Before assembly the lid, base and sides were lined with heavy tar and foil stick-on shielding. This helps with case dampening also. All gold RCA connections were kept to the rear (see other photos). The chips are the LM833s but the Burr-Brown OPA2134 high performance chip can be directly substituted. The on-board +/- 12V regulated PS is shielded from the rest of the sensitive cct. Additional snubbing was added to the line caps to remove PS noise and chip RF decoupling. Though three different compensation can be selected from the cct. brd by moving two jumpers the lid must be removed to do this. A double pole rotating three position switch could be added to provide this facility externally. The cct. includes a gain control which is accessed from the front and allows easy and silent level adjustment. The sound is natural with no hiss or hum. Easy to build.Aug 20, 2008
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PhonoRear.JPGDIY Phono Preamplifier Kit2703 viewsThe finished kit (see other photos) can be assembled in an afternoon. I used insulated gold plated RCAs but on an ABS plastic case like this insulated RCAs are not required. Keeping all connections on the rear makes for a simple front panel with gain control and recessed red led. I used thick silicon stick-on feet to ensure vibration into the unit is kept to a minimum. Stick down computer stand-off hold the cct. brd. to the bottom of the case and also help with vibration control. The case is lined with heavy sticky tar and foil. Base, sides and lid and are lined but not earth. This helps with shielding the low voltage levels and case dampening also. Shielded wiring is used internally and silver solder used throughout.Aug 20, 2008
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PhonoFront.JPGPhono Preamp Kit with RIAA Equalization2730 viewsAfter resurrecting the Rega TT and RB300 tone arm with a Grado Sonata wood body cartridge I went on the hunt for a phono preamp. The Pro-Ject PhonoBox SE preamp was a value for money purchase, a neat and good sounding unit. This phono premp kit cost under $AU100 to build (including AC adapter) and challenges the Pro-Ject on a the sonic level. I can find no fault musically with the kit which has no hiss or hum and a natural sound quality. It is available from Jaycar Australia. Better than the Pro-Ject by provide the facility to have three different selectable compensations including RIAA and early DECCA (ffrr) and a host of others to select from. And to go one step better again there is a gain control to balance between CD and phono input levels. The case is ABS plastic and tar and foil lined. Gold RCAs used (see other photos). A +/- 12V regulated PS is include on the one peace cct. brd. The PS is shielded. Distortion is rated at .014% and RIAA accuracy is better than 1db. Signal to noise is -84dB.Aug 20, 2008
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