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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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Open-Baffle-Speaker-Fostex-FE206E-Eminence-Side.jpg
Open-Baffle-Speaker-Fostex-FE206E-Eminence-Side.jpgFostex FE206E / Eminence Open Baffle Speakers - Side7705 viewsSide view of Keith's Fostex FE206E fullrange and Eminence speakers in an open baffle.
DIY-Fostex-FX120-Transmission-Line-Speaker.jpg
DIY-Fostex-FX120-Transmission-Line-Speaker.jpgDIY Fostex FX120 Transmission Line Speaker7647 viewsHere the Fostex FX120 fullrange driver is used in a DIY Transmission Line Speaker Enclosure. Fore more information, see the DIY Fostex FX120 Transmission Line Speaker Project.
Scanspeak-8531-D3004-6600-00-T-Line.jpg
Scanspeak-8531-D3004-6600-00-T-Line.jpgScanSpeak Revelator 8531 MidBass / D3004-6600-00 Tweeter in Transmission Line Enclosure7502 viewsScanSpeak 8531 mid-bass and Scanspeak RevelatorD3004-6600-00 Aircirc tweeters in a transmission line housing, with the tweeter in separate decoupled enclosure. The cross-over is suspended externally underneath the main housing.
DIY-Class-A-Mosfet-Amp.jpg
DIY-Class-A-Mosfet-Amp.jpgDIY-Class-A-Mosfet-Amp7365 viewsThe fellows over at the Russian audio community datagor.ru have now built a small handful of Mark's simple DIY Class A Mosfet Amplifier project. See the schematic for more details about this build..
Happy_Feet.jpg
Happy_Feet.jpgDIY Loudspeaker Feet7359 viewsThis is a photo of my loudspeaker feet project. For instructions on how to build the loudspeaker feet, see the DIY Loudspeaker Feet Instructions in PDF.

Much regards,
Guus Das.
K-502-Tube-Amplifier-Kit.jpg
K-502-Tube-Amplifier-Kit.jpgK-502 Tube Amplifier Kit7335 viewsBarry's wood and Plexiglas enclosure for the K-502 Tube Amplifier Kit.
Workshop_Heater.JPG
Workshop_Heater.JPG2nd DIY OTL monoblock being built7331 viewsFreezing cold in the workshop , it was a pleasure to be right next to the first monoblock that was pre heating and breaking in the output stage.
Dallas-Back-Loaded-Horn-Speaker-Fostex-FE206E.jpg
Dallas-Back-Loaded-Horn-Speaker-Fostex-FE206E.jpgDallas Back Loaded Horn Foxtex FE206E Speakers7310 viewsPair of Back (rear) Loaded Horn Speakers using the Fostex FE206E driver. The drivers are modified with a custom DIY phase plug. The enclosure design is the Dallas by Ron Clarke. The cabinets were built by Keith.

For more information, see the Dallas Back (Rear) Loaded Horn Speakers with Foxtex FE206E thread on the forum.
Fostex-FE127E-DIY-Bookshelf-Speakers.jpg
Fostex-FE127E-DIY-Bookshelf-Speakers.jpgFostex FE127E DIY Bookshelf Speakers7283 viewsDIY Bookshelf Speakers using the Fostex FE127E fullrange speaker driver.
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Main_-_Copy.JPGLarge mains Speaker using the Lambda 12 TDs drivers 7221 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.
DSCF1666~0.JPG
DSCF1666~0.JPGTransmission Line for Jordan JX9257205 viewsThe Jordan JX92S fullrange drivers look great in this beautifully made transmission line enclosure. Pat from the Melbourne Audio Club drives them with either a pair of valve monoblocks or other SS amps he owns. These including a Sony vintage VFET power amp preamp combo.

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DIY-2SK1058-Class-A-Amp-Day.JPGSingle Ended Class-A Amplifier using 2SK1058 Mosfet7175 viewsOutside view of Sergiy's amplifier build. For more information, see the DIY Class-A Single-Ended 2SK1058 Mosfet Amplifier Project page.
Lowther_DX3_Open_Baffle_Speaker.jpg
Lowther_DX3_Open_Baffle_Speaker.jpgLowther DX3 Open Baffle Speakers7169 viewsBaffle height: 56", Baffle width: 25", 20 mm marine plywood
Baffle sloped 10° to the rear to time-align the drivers.
Fane POP100 18": centre 13" from floor.
Lowther DX3 8": 34" from floor, offset 3" from centre line.
Tweeter 2": upward firing from the top of the baffle.

Acoustic shelf: 26" from floor, 9" wide and 6" deep, centre aligned with the Lowther.
Bass box sides: 10" deep at the bottom, 5" deep at top, 26" height.
Bass port shelf: fitted across the centre of the bass speaker.

Crossover:
6dB per octave
Bass turn-over frequency 120 Hz
Lowther roll-off frequency 240 Hz (high frequencies not rolled off)
Tweeter roll-off frequency 6,000 Hz 12dB per octave

The sound has the typical Lowther wide open mid-range, quick and revealing, even with an old, low powered solid state amp. Usually Lowthers are expected to be in horns, but on a big open baffle, they just fill the room and work just as well.

electric triode (Australia)
www.amplifiers.com.au
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DSC00006_-_Copy.JPGDual stacked dual driver SoundSplinter subwoofers7164 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.
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3.jpgDIY Guitar Amplifier 7157 viewsA photograph of the finished DIY Guitar Amplifier. The simple graphics on the faceplate are custom made and a fender speaker cover is used. The amplifier is a K-16LM 16W Mono Tube Amp Kit.
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6T9FE167E.JPG6T9 Tube Amp and Fostex FE167E in Ported Enclosure.7150 viewsIf you have never built a tube amp, but wanted to, this low power SE 6T9 Tube Amp is a good starting point. But it will need efficient loudspeakers to go with it. The 6T9 amp cct. brd. is from Spare Time Gizmo. All components required can be easily obtained and the amp is simple to build. The Fostex FE167E is a 94dB efficient full range driver and works well with the low power 6T9 amp. All you need now is a CD player and you have an excellent den system or small listening room set-up. Let your mates have their B&Os you have something unique, great sounding and you built it all yourself! See the DIY Fostex FE167E Bookshelf Speaker page for more information about the speakers.
DIY_Loudspeaker_Feet.pdf
DIY_Loudspeaker_Feet.pdfDIY Loudspeaker Feet Instructions7149 viewsHere are DIY instructions to construct feet for returning loudspeakers to the exact same position. Here is a link to a photograph of the finished DIY Loudspeaker Feet.

Much regards,
Guus Das.
Diaphony2.jpg
Diaphony2.jpg"Diaphony's" An open baffle design7138 viewsConstruction with waive guide prior to final rough finish.
PreampComp.jpg
PreampComp.jpgMelbourne Audio Club - Preamp Comparison Night7121 viewsAt the May GM of the Club we did a blind A/B comparison between my 12AX7 Tube Preamp and OP Amp Preamp while the rest of the gear remained unchanged. No member knew whether he was listing to the valve or chip preamp, just A or B. Two similar tracks was played from a wide range of music styles the first track on one preamp and the second track on the other. The members voted 60/40 in favor of the chip preamp.
Realistic-Minimus77-Speakers-AlMg-Driver.jpg
Realistic-Minimus77-Speakers-AlMg-Driver.jpgHiVi BN4 Anodised Aluminium / Magnesium Midbass Drivers7112 viewsThe drivers in these metal enclosure Tandy / Realistic / Radio Shack Minimus 77 speakers, had been burnt out when a chip amp decided to deliver pure DC. So I upgraded the drivers to these metal cone varieties. The magnets (neodymium) are big partly due to the shielding which is done with magnetic repulsion. The cones are ultra-light and very rigid and the surrounds compliant. Power rating is 25WRMS and under listening tests, in the enclosures, go down to 100hz. The over-all sound is bright (see other image). The crossover is 1st order and additional dampening was added to the box.
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