Photos of Commercial Hi-Fi Audio Gear, Components and Products.
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PE-Curved-Speaker-Box-Inside.jpgInside of Curved Parts Express Cabinet9701 viewsInside view of the 0.38 ft^3 Curved Parts Express Cabinet. The baffle fits in tightly and is held in place with four nuts.
John-DIY-Class-A-Mosfet-Amplifier-inside.jpgDIY SE Class A Mosfet Amplifier - inside view15799 viewsInside view of John's DIY amplifier which follows Mark's Single Ended DIY Class A Mosfet Amplifier topology. For more information, see the project thread at diyAudio.com.
LidOff.JPG"not another chip amp"3320 viewsAfter the Synergy Gainclone amp I promised myself I would not make another chip amp. The point-to-point gainclone amp modules were made twelve months ago but never got used. They comprise of the LM3875 and 10,000uF caps. The PS is rated 160VA with a scavenged microwave mains filter and a snubbed rec. bridge. The amp is compact and very loud with a full and very extended bass with small bookshelf speakers. You feel this amp could power a whole night club. Well it fills this house with clear clean music! And that is how it sounds -> clear and clean!
mURI_temp_f1d472f0.jpgDIY Speaker Cable4844 viewsThe cable in the beginning of the project.
Gobo-LM1875-Stereo-Amplifier-Kit.jpgGobo LM1875 Stereo Amplifier Kit17 viewsThe Gobo Stereo Amplifier kit is a class-AB chip amp kit based around the LM1875 IC. This is a complete amp kit that includes all the necessary parts and enclosure to build a stereo amplifier. The LM1875 amp kit comes with audio-grade capacitors and toroidal transformer. The Gobo amplifier kit is easy to build, looks and sounds great. The amplifier kit is well suited to first time amp builders.
For full details, see our review of the Gobo LM1875 Stereo Amplifier KitJul 20, 2014
6SN7-6V6-SE-Black-Lace.jpgBlack Lace - SE 6V6 Amplifier57 views“Black Lace” - an all Australian tube amplifier with tubes from the 60’s. Miniwatt: 6V6 black glass, 6SN7 and 5U4. Old school build with PIO caps, solder from the 70’s with copper and carbon film resistors. See the froum thread Black Lace - 6V6 power amp, old school
Mark Houston – retro-thermionicJun 20, 2014
6DJ8-6AS7-OTL-HP-Amp-Sanguine.jpgSanguine - 6AS7 OTL Headphone Amplifier320 viewsThe power supply and amp section are on two die-cast Al bases. A Sophia Mesh Plate Princess 274B rec. tube does the rectification. The PS has its own power filter to reduce EMI\RFI and the mains cable is choked. The power transformer is Hammond and the 20H choke is Hammond also and these are both isolated from the chassis by rubber grommets to control vibration. The 6AS7 power tube is NOS Winged "C" Svetlana and a NOS Tesla E88CC gold pin for the driver and is directly coupled. XLRs connect the HT and AC filament current to the amp section. A single 6.5mm input upfront with dual headphone output. Attenuation is provided by an Alps Blue Velvet pot. Both enclosures are dampened with bituminous Al foil and the paint is Epoxy Enamel. The attenuator knob is 4 ounces of solid brass.
The Sophia Mesh Plate 274B rec. tube and a 4uf PIO Russian filter cap start the filtering network with seven stages of filtering and storage in all. There is no PCBs or shielded wire used in this amp to dull the sound. Wiring is all point-2-point and component-2-componet. Fine silver plated wire warp wire carries all the audio. The only caps in the amp are the output caps. WBT silver solder is used throughout.Feb 10, 2014
6EM7-SE-Amp.jpgSE 6EM7 Power Amplifier517 viewsYet another 6EM7 power amplifier. This time some parts were down graded and a different internal layout technique was used. The power transformer and choke are isolated top and bottom by rubber grommets. This ensures no AC vibration reaches the tubes. The initial power supply filtering is preceded with a on-board power filter, a 20uF/450V electrolytic capacitor and a 20H/100mA Hammond choke. The HT is supplied by a Hammond power transformer and Sovtek 5Y3 rectifier tube. The second stage of filtering is 47uF and 100uF electrolytic with a large limiting resistor ensure the amp is totally free from of hum and noise. All power supply capacitors are snubbed.
This amp sounds better than the last and I think it may be the Sylvania NOS 6EM7 tubes. Sprague orange drops are used in the inter-stage coupling and once more large non-polarized capacitors for the bypass on the power tubes. For the first time I have used Chinese made H&K 15W audio output transformers, can't fault them. The look of the amp is almost under-stated "sexy" and the sound the same - sexy and natural.