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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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Freds-Place-SAR-Labs-STA80.jpgListening Session at Fred's Place - April 20106377 viewsPhoto of the listening session over at Fred's place in April 2010. Components shown in the photo are:
SAR Labs STA80 KT88 Tube Amp with JJ KT88 Blue Glass tubes (top left)

OddWatt Audio DIY KT88 Push-Pull Monoblock Tube Amp Kits with Gold Lion KT88 tubes (bottom middle) put together by Gio.

The small speakers are from a Tang Band D4-1 DIY Back Horn Speaker Kit put together by Gio.

And the large Fostex FF85K Eminence Alpha 15A Open Baffle Speaker were built by Keith.
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S-5-Electronics-K-12-Tube-Amp-Kit-2.jpgS-5 Electronics K-12 Tube Amp Kit6374 viewsFront view of K-12 Tube Amplifier Kit. The case is made of MDF and painted black with a high temperature resistant paint. Above the front On/Off switch is a blue LED. I also exchanged the volume knob with a black one from an old Yamaha subwoofer.
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S-5-Electronics-K-12-Tube-Amp-Kit-Board.jpgS-5 Electronics K-12 Tube Amp Kit - Circuit Board6373 viewsBottom view of my K-12 Tube Amp Kit. The fan is used to cool the power transformer which runs a little hot.
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mURI_temp_83a855a8.jpgDIY Folded Horn Tower Speaker6337 viewsHere is a front close-up of the tower speakers !
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mURI_temp_407ba9b9.jpgDIY Tower Loudspeakers6331 viewsThe empty front panel close-up !
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reds.jpgDIY PVC Pipe Speakers with HiVi B3N driver6331 viewsThe speaker enclosures are made using various PVC pipe sections. The PVC pipe enclosure houses a 3-inch HiVi B3N fullrange driver. The enclosure is tuned through bass port at the end of the pipe stand. Binding posts are on the back. The frequency range is about 80 to 20,000Hz . There is a nice sound stage and pretty good low end response considering the small size of the driver and enclosure. I would love to hear your comments about this HiVi B3N Full Range Speaker project.
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Hi-Vi-Research-Swans-Tempus-Speakers.JPGHi-Vi Research Swans Tempus Speakers6325 viewsHi-Vi Research Swans Tempus Bookshelf Speakers built by Daniel Bolduc. Bass frequencies are deep and clean while the highs are well balanced. But, due to either the limitation of the TN28 to 20 kHz or the crossover network, high frequencies are not as well defined and crisp as on the Hi-Vi 3-Way Tower Loudspeakers I built few months ago.

Here is an overview of Hi-Vi Research F6 / TN28 Swans Tempus Bookshelf Speakers with the enclosure plan. Also see my build log for more photos and construction details.
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Jordan-JX92S-Bass-Reflex-Speakers.jpgSmall Bass Reflex Speakers with Jordan JX92S Drivers6320 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.
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DIY-Three-Way-Tower-HiVi-Speakers.JPGDIY Three Way Tower HiVi Speakers6315 viewsDavid has completed a build of Adam's DIY 3-Way HiVi Tower Speaker Project. Each three-way tower loudspeakers uses one HiVi F8 woofer, two HiVi F5 mid-woofers and a HiVi RT1C-A Planar Isodynamic Tweeter. The speaker is the same as the original build with the exception that a HiVi Research RT1C-A tweeter is used in place of the HiVi SD1.1A tweeter.
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BrazCherry.jpgOrion DIY speakers6298 viewsThese dipole speakers are available as a DIY project, a kit, or completed speakers. You can purchase the plans from Siegfried Linkwitz (www.linkwitzlab.com).
The speakers use two 10" Peerless subwoofers, an 8" SEAS midrange driver and two SEAS Excel tweeters per cabinet. The active crossover circuit board is also available from Linqwitz Lab. The documentation includes all that is needed to build these yourself. For those who want some of the assembly completed, the crossover is available fully assembled and tested. A kit, unique parts and brackets for completing the construction, and completed speakers are also available. The speakers are driven with 8 channels of amplification (60 watts per channel). One can parallel the woofers to get by on 6 channels. There is much information on the web about the quality of these speakers. Anyone seeking very high quality speakers at a DIY price for music reproduction or for home theater will not be disappointed.
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Feastrex-NF-5-Bass-Reflex-Enclosure.jpgFeastrex NF-5 Bass Reflex Speakers6289 viewsThe lovely Feastrex NF-5 fullrange drivers on display at the 2011 Salon Son & Image show. The single fullrange drivers were housed in a bass reflex enclosure and driven by a Mastersound Compact 845 SET amp.

See the Feastrex NF-5 and NF-5ex Drivers SSI 2011 report for more details.
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Diaphony6.jpg"Diaphony's" An open baffle design6285 viewsConstruction
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Jordan-JX92S-Transmission-Line-Loudspeaker_.jpgJordan JX92S in Transmission Line Loudspeaker Enclosure6274 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
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Swans-Tempus-HiVi-3-Way-Tower-Speakers.jpgSwans Tempus and HiVi 3-Way Tower Speakers6269 viewsDIY Hi-Vi Research Swans Tempus Bookshelf Speakers sitting on Hi-Vi 3-Way Tower Loudspeakers that I built a few months back.

See Hi-Vi Research F6 / TN28 Swans Tempus Bookshelf Speakers for an overview and the speaker box plans. Also my build log has more photos and construction notes.
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071.JPGsaba open baffle speakers6259 viewsThe system so far. Project Debut III with acrylic platter and Speed Box II, Cambridge Audio 640P phono stage, DBX 223 XL active crossover, Decware SE84C+ set amp for the mid/high freq, Trends TA 10.1 for the low freq, endorphine P-17 open baffle speakers with emminance Delta 15A and SABA greencone oval with Grundig 4" used for tweeter until the SABA tweeter arrives.
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DSCN0747.JPGK-16LS Customized Tube Amplifier Kit6247 viewsUpgraded stock capacitors to Dayton Audios and Ruby Golds with filtering caps bottom mounted. Transformers rotated and side mounted to reduce noise, along with quad-star, shielded signal cables.
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Ion_DIY_2-Way_TMM_Tower_Speaker.jpgIon - DIY 2-Way TMM Tower Loudspeaker6246 viewsThe Ion tower loudspeaker project is Adam's latest diy speaker project. The Ion is a 2-way speaker in a TMM configuration. A Tang Band 25-1372SC 1" inverted titanium dome tweeter is used along with a pair of Audax HM170CO 6" woven carbon fiber woofers.

The Ion speaker project will be a very challenging build but Adam notes that it comes with a huge payoff! The Ion tower speakers have quickly become Adam's favorite loudspeakers.

For the full project details, see the Ion - DIY 2-Way TMM Tower Speaker Project.
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Hi-Vi-Research-Swans-Tempus-Bookshelf-Speakers.JPGHi-Vi Research Swans Tempus Bookshelf Speakers6242 viewsRear view of the Hi-Vi Research Swans Tempus Bookshelf Speakers. I built two pairs of the Tempus and the cost was about $725/pair. I think that is a very fair price for speakers of that quality.

See Hi-Vi Research F6 / TN28 Swans Tempus Bookshelf Speakers for the speaker box enclosure plan. Also my build log has more information.
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HiVi-SP10-Subwoofers.jpgHiVi SP10 Subwoofers6222 viewsA pair of subwoofers built by Daniel's following Adam's DIY HiVi SP10 Subwoofer Project. Full details of Daniel's build are available at his webpage.

In the background is are the DIY Hi-Vi 3-Way Tower Loudspeakers also built by Daniel.
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MicPreCct.JPGInside the diy microphone preamp6213 viewsThe cct. brd. for the ESP low noise two transistor mic preamp attaches to the lid of the this solid die-cast aluminum case. Batteries also are mounted on the cct. brd. This preamp is free from hiss and all noise and is the perfect partner for high quality low output mics. A more compact version could be constructed using electrolytic caps and AAA batteries (12V). But the quality would suffer a little with the inferior caps.
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