Oct
30
KT88 Push-Pull Mono Block Tube Amps
October 30, 2008 | Leave a Comment
Bruce from the USA has completed his second follow up to his original OddWatt tube amplifier project (a EL84/6BQ5 Push-Pull Tube Amplifier) with the Odd Blocks. The Odd Blocks are a pair of KT88 Push-Pull Mono Block Tube Amplifiers. Like the Oddwatt 225 (a KT77 SIPP (Push-Pull) Tube Amplifier), the Odd Blocks are also scalable [...]
Oct
20
Fostex FE167E Bass Reflex Speakers
October 20, 2008 | Leave a Comment
by Mark HoustonThe very first pair of speakers I put together some thirty-eight years ago was a pair of single-driver loudspeakers using 8” Kaltro twin cone drivers. As I type this, I find myself once again listening to speakers using a single full-range driver. This time it is the 6.5” Fostex FE167E fullrange driver. I [...]
Oct
14
DIY Jordan JX92S Tower Speaker
October 14, 2008 | Leave a Comment
Gary from the United States has put together a fantastic looking pair of tower loudspeakers. His speaker project uses the Jordan JX92S Fullrange Driver which I have used myself and is a fantastic driver.The fullrange JX92S speaker is housed in a Bass Reflex Enclosure with a volume of about 1.3 cubic feet and a box [...]
Oct
13
Isobaric 6th Order Bandpass Subwoofer
October 13, 2008 | Leave a Comment
Dan McGrath (from Great Britain) sent an email with a link to his recent DIY Subwoofer project. For the subwoofer project, Dan decided to use an Isobaric Sixth Order Series-Tuned Bandpass enclosure. The basic layout of a 6th order isobaric bandpass enclosure is shown in the figure below. The enclosure was constructed using Medium-Density Fiberboard [...]
Sep
26
Swans Tempus Bookshelf Speakers
September 26, 2008 | Leave a Comment
Daniel Bolduc (from Canada) sent us an email informing us that he has finished a another set of DIY Speakers. His latest project is two sets of Swans Tempus Bookshelf Speakers by HiVi Research. The Tempus speakers were featured in the German sound magazine KLANG+TON in their June 2002 issue which commended the excellent acoustic [...]
Sep
22
DIY Jordan JX92S Open Baffle Speaker
September 22, 2008 | Leave a Comment
Martin J. King of Quarter Wavelength Loudspeaker Design has added a new DIY open baffle loudspeaker project to his site. Martin’s loudspeaker project uses a Jordan JX92S full range driver mounted on an open baffle in conjunction with a Goldwood GW-1858 woofer which is mounted in an H-frame. The picture below (click to enlarge) shows [...]
Sep
11
Ultra-Linear 6T9 DIY Tube Amplifier
September 11, 2008 | Leave a Comment
It was always my intention to build two 6T9 vacuum tube amplifiers. For the first one I used a baking pan for the chassis and I was interested to hear just how good these simple single-ended (SE) tube amps could be with just basic components. From the first hour of play I was very impressed [...]
Sep
11
DIY Home Theatre Speakers
September 11, 2008 | Leave a Comment
Back in September 2007 Adam constructed a pair of 3-Way DIY Tower Loudspeaker using all HiVi Research drivers. Well, as most of us in this hobby know – once you start building, you just can’t stop! The photo below shows Adam’s HT setup up in 2007 sporting his new DIY tower loudspeakers. And here is [...]
Jul
11
KT88 SINGLE ENDED (SE) TUBE AMP
July 11, 2008 | Leave a Comment
KT88 AMPLIFIER This diy audio project is a single ended (SE) KT88 tube amplifier. The design has been based largely around Mikael Abdellah’s KT88 SE Tube Amplifier design from 2003. A schematic of the single ended KT88 amp that I have built is shown below in Figure 01. Figure 01: KT88 Tube Amplifier Schematic The [...]