2. Hobbies

Speakers

With speakers, size does matter!
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  • Shown under construction, an open back design featuring 8" Dayton Audio PS220-8 Point Source Full-Range Neo Driver with a 15" H-frame eminence Alpha 15 subwoofer, using a 100 watt plate amp for each sub.

    Shown under construction, an open back design featuring 8" Dayton Audio PS220-8 Point Source Full-Range Neo Driver with a 15" H-frame eminence Alpha 15 subwoofer, using a 100 watt plate amp for each sub.

  • The DR912a line array speakers

    The DR912a line array speakers

  • Jim Griffin design mass loaded transmission line speakers using Mark Audio Alpair 10.2 full range drivers. Front view of one enclosure along with a back view of the other. (Set cursor on the picture for larger views).

    Jim Griffin design mass loaded transmission line speakers using Mark Audio Alpair 10.2 full range drivers. Front view of one enclosure along with a back view of the other. (Set cursor on the picture for larger views).

  • The Selah Audio XT-8 line arrays, each incorporating eight 7" Vifa XT woofers and eight Fountek ribbon tweeters.

    The Selah Audio XT-8 line arrays, each incorporating eight 7" Vifa XT woofers and eight Fountek ribbon tweeters.

  • Selah Audio XT-8 Line Arrays. Each ported enclosure is 72"H, 14"W, 18"D, and houses eight 7" Vifa XT-18 midbass drivers and eight Fountek JP-2 ribbon tweeters. The crossovers use Alpha Core copper foil inductors, Hovland caps, and Mills resistors.

    Selah Audio XT-8 Line Arrays. Each ported enclosure is 72"H, 14"W, 18"D, and houses eight 7" Vifa XT-18 midbass drivers and eight Fountek JP-2 ribbon tweeters. The crossovers use Alpha Core copper foil inductors, Hovland caps, and Mills resistors.

  • The ART Arrays driven by 2A3 SET Bottlehead Paramour monoblocks, a Goldpoint stepped attenuator passive "preamp", and a modded Toshiba 3950 DVD player. The parts needed to build a pair are avaiable from Parts Express for $275, excluding the enclosures.

    The ART Arrays driven by 2A3 SET Bottlehead Paramour monoblocks, a Goldpoint stepped attenuator passive "preamp", and a modded Toshiba 3950 DVD player. The parts needed to build a pair are avaiable from Parts Express for $275, excluding the enclosures.

  • The latest version of the Studio One Pi tower, using the standard One Pi kit in a 2 cu ft enclosure tuned to 49hz. The enclosure is 9.5" wide, 12.5" deep, by 36" high. The enclosure is made from 11 ply baltic birch veneer plywood. CLICK ON PICTURE TO ENLARGE

    The latest version of the Studio One Pi tower, using the standard One Pi kit in a 2 cu ft enclosure tuned to 49hz. The enclosure is 9.5" wide, 12.5" deep, by 36" high. The enclosure is made from 11 ply baltic birch veneer plywood. CLICK ON PICTURE TO ENLARGE

  • An earlier pair of One Pi Towers in the downstairs system.

    An earlier pair of One Pi Towers in the downstairs system.

  • Speakers lined up for the July 22 Lone Star Bottlehead meeting. L to R, the Insignia standmount speakers, Jim Griffin design MLTL single driver bipoles, Zaph Audio two ways using Seas metal cone/dome drivers, the FredAudio F8's having 95dB sensitivity and 1st order crossovers using Eminence Alpha 8 woofers and GR Research T-6 silk dome tweeters. The partially visible drivers at the right edge of the picture are from a pair of Klipsch Cornwalls I'm refinishing.

    Speakers lined up for the July 22 Lone Star Bottlehead meeting. L to R, the Insignia standmount speakers, Jim Griffin design MLTL single driver bipoles, Zaph Audio two ways using Seas metal cone/dome drivers, the FredAudio F8's having 95dB sensitivity and 1st order crossovers using Eminence Alpha 8 woofers and GR Research T-6 silk dome tweeters. The partially visible drivers at the right edge of the picture are from a pair of Klipsch Cornwalls I'm refinishing.

  • Jim Griffin design bipole speakers in the upstairs system, driven by Squeezebox wireless server, Lite Audio DAC-AH, DIY passive preamp, Monarchy Audio ST-70 Pro class A zero feedback amplifiers bridged for use as monoblocks (140 watts into 4 ohms).

    Jim Griffin design bipole speakers in the upstairs system, driven by Squeezebox wireless server, Lite Audio DAC-AH, DIY passive preamp, Monarchy Audio ST-70 Pro class A zero feedback amplifiers bridged for use as monoblocks (140 watts into 4 ohms).

  • Front and back views of bipole single driver mass loaded transmission line speakers designed by Jim Griffin, using one 5" full range Creative Sound Solutions FR125S driver firing forward and one WR125S firing from the rear baffle. CLICK ON THE PICTURE FOR A LARGER IMAGE.

    Front and back views of bipole single driver mass loaded transmission line speakers designed by Jim Griffin, using one 5" full range Creative Sound Solutions FR125S driver firing forward and one WR125S firing from the rear baffle. CLICK ON THE PICTURE FOR A LARGER IMAGE.

  • Zaph Audio two-way floorstander using 7" Seas L-18 aluminum cone woofer and alloy dome tweeter. Veneered in natural red oak.

    Zaph Audio two-way floorstander using 7" Seas L-18 aluminum cone woofer and alloy dome tweeter. Veneered in natural red oak.

  • The Art Arrays are a line array type speaker using eight 5.5" woofers with a single 1" dome tweeter.

    The Art Arrays are a line array type speaker using eight 5.5" woofers with a single 1" dome tweeter.

  • High efficiency speaker incorporating an Eminence Alpha 8 woofer and a GR Research T-6 tweeter in a 1.5 cu ft tower enclosure. Nominal impedance is 8 ohms, sensitivity is about 95dB. First order crossover. The enclosure is tuned to 54hz using a 4" id port. Pictured here veneered in natural red oak.

    High efficiency speaker incorporating an Eminence Alpha 8 woofer and a GR Research T-6 tweeter in a 1.5 cu ft tower enclosure. Nominal impedance is 8 ohms, sensitivity is about 95dB. First order crossover. The enclosure is tuned to 54hz using a 4" id port. Pictured here veneered in natural red oak.

  • The 3 Pi Theater two-way using Eminence drivers.

    The 3 Pi Theater two-way using Eminence drivers.

  • Linus 2 - Each enclosure having 10 Vifa 5.5" TC series woofers & 8 Dayton PT2 planar tweeters. Five ohm impedance, 95dB sensitivity. The speakers are offered by Selah audio.

    Linus 2 - Each enclosure having 10 Vifa 5.5" TC series woofers & 8 Dayton PT2 planar tweeters. Five ohm impedance, 95dB sensitivity. The speakers are offered by Selah audio.

  • Speaker Building Workshop - Linus 2 Under Construction. You can do anything if you got the right tools!

    Speaker Building Workshop - Linus 2 Under Construction. You can do anything if you got the right tools!

  • The Fredarrays are 6' line arrays, each having ten 5.25" Silver Flute woofers and a single 1" MCM titanium dome tweeter. Two 4" ports on the back extend the response into the low 50's. Sensitivity is about 95dB and impedance is 9 ohms, making them a good match for the 300B set amp pictured.

    The Fredarrays are 6' line arrays, each having ten 5.25" Silver Flute woofers and a single 1" MCM titanium dome tweeter. Two 4" ports on the back extend the response into the low 50's. Sensitivity is about 95dB and impedance is 9 ohms, making them a good match for the 300B set amp pictured.

  • The AnoreXiarray - 72" high, 7.5" wide, 5.5" deep, each cabinet having ten 4.5" Vifa/JBL BC11BG07-06 midwoofers and one Peerless 1" fabric dome horn loaded tweeter. Second order woofer crossover, 3rd order tweeter crossover at 2.9khz using Jantzen 15 & 18 ga air core inductors & Solen capacitors. Shown here driven by a Sonic Frontiers Power 2 amp, about 100 watts overkill for these very sensitive speakers.

    The AnoreXiarray - 72" high, 7.5" wide, 5.5" deep, each cabinet having ten 4.5" Vifa/JBL BC11BG07-06 midwoofers and one Peerless 1" fabric dome horn loaded tweeter. Second order woofer crossover, 3rd order tweeter crossover at 2.9khz using Jantzen 15 & 18 ga air core inductors & Solen capacitors. Shown here driven by a Sonic Frontiers Power 2 amp, about 100 watts overkill for these very sensitive speakers.

  • The subwoofer behind the Anorexiarray is an older Advent sub whose foam surround 10" driver recently bit the dust. The replacement driver shown is a 10" Dayton sheilded DVC which fit into the 1.5 cu ft enclosure nicely in a sealed configuration. In room response is flat to about 25hz.

    The subwoofer behind the Anorexiarray is an older Advent sub whose foam surround 10" driver recently bit the dust. The replacement driver shown is a 10" Dayton sheilded DVC which fit into the 1.5 cu ft enclosure nicely in a sealed configuration. In room response is flat to about 25hz.

  • Voigt pipes using Fostex FE166E 6" drivers. The enclosure is made of 3/4" birch veneer plywood with painted mdf accents.

    Voigt pipes using Fostex FE166E 6" drivers. The enclosure is made of 3/4" birch veneer plywood with painted mdf accents.

  • The FredArray II Line Arrays, a rear-ported design using Silver Flute 5.5" woofers and a Vifa DX25 tweeter.

    The FredArray II Line Arrays, a rear-ported design using Silver Flute 5.5" woofers and a Vifa DX25 tweeter.

  • Eros MKII, MTM design using 7" Vifa Premium Line Series Woofers and Scan Speak D2905-9500 1" Textile Dome tweeters, with series crossovers using Alpha Core 12 ga inductors & NorthCreek Harmony caps. A tube-friendly design that sounds really good with a 300B SET amp. Plans available from speakerbuilder.net. These modest looking speakers are among the best I have heard, and for several years they were in the Houston Audio Society's meeting room as our reference speakers.

    Eros MKII, MTM design using 7" Vifa Premium Line Series Woofers and Scan Speak D2905-9500 1" Textile Dome tweeters, with series crossovers using Alpha Core 12 ga inductors & NorthCreek Harmony caps. A tube-friendly design that sounds really good with a 300B SET amp. Plans available from speakerbuilder.net. These modest looking speakers are among the best I have heard, and for several years they were in the Houston Audio Society's meeting room as our reference speakers.

  • Magnepan 1.6QR's with upgraded crossover.

    Magnepan 1.6QR's with upgraded crossover.

  • Magnepan MG3.6R's with the Sonic Frontiers Power 2 amplifier. Maggies are among the best sounding speakers available, but they are ridiculously inefficient. The 3.6's require about four time the power of a pair of Vandersteen 2CEsigs to achieve the same volume level. Low power tube amps need not apply.

    Magnepan MG3.6R's with the Sonic Frontiers Power 2 amplifier. Maggies are among the best sounding speakers available, but they are ridiculously inefficient. The 3.6's require about four time the power of a pair of Vandersteen 2CEsigs to achieve the same volume level. Low power tube amps need not apply.

  • Audio Nirvana 8" single driver speakers. These drivers have a rising frequency response below 1khz. Even with a bsc filter they are some of the worst sounDing drivers I've heard. I'm talking BRIGHTANDINYOURFACEBADSOUNDING!

    Audio Nirvana 8" single driver speakers. These drivers have a rising frequency response below 1khz. Even with a bsc filter they are some of the worst sounDing drivers I've heard. I'm talking BRIGHTANDINYOURFACEBADSOUNDING!

  • Here's a situation we guys with understanding wives and girlfriends DON'T have. I feel sorry for any man who has to come home from work every night to handle this kind of problem. Much better to hear "OH, you got another pair of seven foot tall speakers. COOL!!!" But I do appreciate her woofers.

    Here's a situation we guys with understanding wives and girlfriends DON'T have. I feel sorry for any man who has to come home from work every night to handle this kind of problem. Much better to hear "OH, you got another pair of seven foot tall speakers. COOL!!!" But I do appreciate her woofers.

  • Built for Russ - Studio One Pi in a 1.3 cu ft baltic birch tower enclosure.

    Built for Russ - Studio One Pi in a 1.3 cu ft baltic birch tower enclosure.

  • Klipsch Cornwall drivers behind the new crossver (foreground) with the original crossover to the side.

    Klipsch Cornwall drivers behind the new crossver (foreground) with the original crossover to the side.

  • Klipsch Cornwalls with upgraded crossovers, vintage circa 1982. These speakers are currently being refinished, and additional mods are being made to the crossovers.

    Klipsch Cornwalls with upgraded crossovers, vintage circa 1982. These speakers are currently being refinished, and additional mods are being made to the crossovers.

  • The ART Arrays

    The ART Arrays

  • Three Pi speaker with a Fountek ribbon supertweeter. The three Pi is a great design, and ultimately I found I preferred this speaker without the supertweeter.

    Three Pi speaker with a Fountek ribbon supertweeter. The three Pi is a great design, and ultimately I found I preferred this speaker without the supertweeter.

  • The "Talleray", standing 7' 4" tall, is an open back dipole line array featuring fourteen 5.25" Foster extended range midwoofers and an Eminence compression driver mounted to a Dayton waveguide. Impedance is 7 ohms, sensitivity is about 96dB. The midwoofers run full range; the tweeter crossove is a 2nd order.

    The "Talleray", standing 7' 4" tall, is an open back dipole line array featuring fourteen 5.25" Foster extended range midwoofers and an Eminence compression driver mounted to a Dayton waveguide. Impedance is 7 ohms, sensitivity is about 96dB. The midwoofers run full range; the tweeter crossove is a 2nd order.

  • All dressed up and ready to party! This turned out to be a REALLY BAD SOUNDING speaker, but it was cheap to build and could play REALLY LOUD, so I gave it to my nephew who thinks it's the best speaker he's ever heard.

    All dressed up and ready to party! This turned out to be a REALLY BAD SOUNDING speaker, but it was cheap to build and could play REALLY LOUD, so I gave it to my nephew who thinks it's the best speaker he's ever heard.

  • The "Statements", a five foot tall three-way W-M-T-M-W design by Jim Holtz using 8" Dayton reference series aluminum cone woofers, 4" Tang Band titanium cone midranges, and a Fountek ribbon tweeter. Crossovers are at 350hz and 3.7khz.

    The "Statements", a five foot tall three-way W-M-T-M-W design by Jim Holtz using 8" Dayton reference series aluminum cone woofers, 4" Tang Band titanium cone midranges, and a Fountek ribbon tweeter. Crossovers are at 350hz and 3.7khz.

  • The Zigmahornets

    The Zigmahornets

  • The Zigmahornet painted red.

    The Zigmahornet painted red.

  • A veneered and painted Statement

    A veneered and painted Statement

  • Latest version of the Statements.

    Latest version of the Statements.

  • The RS180 Modula MT, a Jon Marsh design, using Dayton Reference drivers. This one using the Dayton 0.75 cu ft curved side enclosures.

    The RS180 Modula MT, a Jon Marsh design, using Dayton Reference drivers. This one using the Dayton 0.75 cu ft curved side enclosures.

  • The Khanspires, a sealed WMTMW using all Dayton RS drivers.

    The Khanspires, a sealed WMTMW using all Dayton RS drivers.

  • The AudioFred 2 MTM incorporates two 6.5" midwoofers with a single 1.125" silk dome tweeter. Crossover parts include air core inductors, metallized polypropylene capacitors, and non-inductive resistors. The one cubic ft rear-ported enclosure is finished in a furniture-quality cherry veneer. A grill with magnetic fasteners is included to discourage curious fingers.

    The AudioFred 2 MTM incorporates two 6.5" midwoofers with a single 1.125" silk dome tweeter. Crossover parts include air core inductors, metallized polypropylene capacitors, and non-inductive resistors. The one cubic ft rear-ported enclosure is finished in a furniture-quality cherry veneer. A grill with magnetic fasteners is included to discourage curious fingers.

  • The AudioFred 2 MTM is veneered on five sides. The baffle is satin black. Here's a rear view showing the flared 2.5" port and gold plated speaker terminals.

    The AudioFred 2 MTM is veneered on five sides. The baffle is satin black. Here's a rear view showing the flared 2.5" port and gold plated speaker terminals.

  • The AudioFred Reference One MT, also known as the Parts Express BR-1. I buy these as kits from Parts Express. Their current price for the unassembled kit is $150 plus $25 shipping. I can build a pair for you and sell them for $175, a bit more if you want to upgrade the crossover parts.

    The AudioFred Reference One MT, also known as the Parts Express BR-1. I buy these as kits from Parts Express. Their current price for the unassembled kit is $150 plus $25 shipping. I can build a pair for you and sell them for $175, a bit more if you want to upgrade the crossover parts.

  • The Selah Audio Texas Revelator Tower, a 2.5-way ported design featuring Scan Speak Revelator drivers. Just completed and playing for the first time in their nude mdf enclosures.

    The Selah Audio Texas Revelator Tower, a 2.5-way ported design featuring Scan Speak Revelator drivers. Just completed and playing for the first time in their nude mdf enclosures.

  • The Selah Audio Texas Revelator Tower, a 2.5 way speaker using Scan Speak Revelator drivers, with Clarity SA caps in the signal path of the Air Circ tweeter.

    The Selah Audio Texas Revelator Tower, a 2.5 way speaker using Scan Speak Revelator drivers, with Clarity SA caps in the signal path of the Air Circ tweeter.

  • Maggie MMG before she got her sexy high heels.

    Maggie MMG before she got her sexy high heels.

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    Jim Griffin design mass loaded transmission line speakers using Mark Audio Alpair 10.2 full range drivers. Front view of one enclosure along with a back view of the other. (Set cursor on the picture for larger views).
    The Selah Audio XT-8 line arrays, each incorporating eight 7" Vifa XT woofers and eight Fountek ribbon tweeters.
    Selah Audio XT-8 Line Arrays. Each ported enclosure is 72"H, 14"W, 18"D, and houses eight 7" Vifa XT-18 midbass drivers and eight Fountek JP-2 ribbon tweeters. The crossovers use Alpha Core copper foil inductors, Hovland caps, and Mills resistors.