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Mill_1.JPGFront View of the DIY OTL Tube monoblocks7135 viewsWeighing in at 18.5kg's each , these chassis are milled out of Aluminum plate and form part of the main heat sink for the tube sockets that are a precision fit . 6mm thick plate was used through out . The feet are solid with machined slots using cap screws to capture from the inside ( so no holes can be seen )
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dscf1833.jpgFostex FE127E FS Fonkens7126 viewsHere is the setup in the basement. The new Audio Nirvana Super 12s are what are sitting on the Fostex FE127E Fonkens. I am breaking them in and will be building bass reflex cabinets soon.
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S-5-Electronics-K-12-Tube-Amp-Kit-Board.jpgS-5 Electronics K-12 Tube Amp Kit - Circuit Board7115 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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S-5-Electronics-K-12-Tube-Amp-Kit-2.jpgS-5 Electronics K-12 Tube Amp Kit7097 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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bass_table.jpgSubwoofer Coffee Table7063 viewsA subwoofer which has been transformed into a coffee table.
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sm-Mains_final_Crossover.jpg3-Way Crossover7044 viewsCrossover for my main speakers with twin Lambda 12 TDs mid woofers, 4 passive radiators, 2 scan speak mids, and HIVI research RT2II tweeter
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PreAmp.JPGOPA2134 based preamp with balance control.7040 viewsWith the case work complete it will not be long before this OP based preamp is singing along. The case is small about 115 X 85 and cast aluminum. Gain is 3 dB and a balance control has been included. Full details for this project are available at: DIY OPA2134 Preamplifier Project.
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Fostex-FE127E-DIY-Bass-Reflex-Speaker-1.jpgFostex FE127E DIY Bass Reflex Speaker7017 viewsClose up view of the finished bookshelf speakers. The speakers are based on the plans of Rabbitz Fostex FE127E DIY Bass Reflex Bookshelf Speakers.
The woodworking and painting of the cabinets were completed by a friend.
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DIY-Three-Way-Tower-HiVi-Speakers.JPGDIY Three Way Tower HiVi Speakers7006 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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K-12G-Tube-Amp-Kit-Wine-Box.jpgK-12G Tube Amp Kit in a Wine Box6993 viewsA K-12G Tube Amplifier Kit built into a wooden wine box.
Thread: K12G In A Wine Box ..
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ClubPreampComp.jpgMelbourne Audio Club preamp comparison night equipment6991 viewsFor the preamp comparison my 12AX7 Tube Preamp and OP Amp Preamp were used. My Gainclone monoblocks were used for the power amps. The speakers in the other image were built by a club member also. An A/B switch was used to switch from one preamp to the other under a blind test situation. This allowed a quick comparison between the two very different preamps. Though the chip preamp was voted the better (60/40) many still expressed their preference for the valve preamp.
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reds.jpgDIY PVC Pipe Speakers with HiVi B3N driver6981 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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6SN7-6L6-Tube-Amp-1.jpg6SN7 / 6L6 DIY Tube Amp6948 viewsThe valve lineup for each channel is a 6SN7 as first amplifier and phase splitter, followed by another 6SN7 driving a pair of 6L6s. Bias is set by active semiconductor current sinks. The 400V HT is generated by a double anode diode (5R4) driving a choke input filter. The audio output transformers are Hammond Manufacturing 1620s. With a conservative rating of 20W per channel, measured frequency response is 10Hz to 40KHz with minimal square wave overshoot. I'm very pleased with how this unit sounds and looks.
Schematic Drawing: Williamson 6SN7 - 6L6 (KT66) Tube Amplifier
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BrazCherry.jpgOrion DIY speakers6939 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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IMG_3234.JPGK-12G tube amplifier kit - finished6931 viewsBuilt the S-5 Electronics K-12G tube amplifier kit into an old Kenwood amplifier case. Finished product.
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mURI_temp_407ba9b9.jpgDIY Tower Loudspeakers6912 viewsThe empty front panel close-up !
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mURI_temp_83a855a8.jpgDIY Folded Horn Tower Speaker6908 viewsHere is a front close-up of the tower speakers !
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K-12-Tube-Amp-Kit-with-Enclosure.jpgK-12G Tube Amplifier Kit with "G" Series Case6900 viewsFinished build of a S5 Electronics K-12G Tube Amplifier kit by Rudi Slejkovec in Slovenia. The enclosure is a "G" series case which is also available from the manufacturer.
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Jordan-JX92S-Bass-Reflex-Speakers.jpgSmall Bass Reflex Speakers with Jordan JX92S Drivers6889 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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Hi-Vi-Research-Swans-Tempus-Speakers.JPGHi-Vi Research Swans Tempus Speakers6885 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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