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Hi, I thought I'd post an overview of my loungeroom system now its approaching completeness in it's current form. Portions of this have been documented in the DIY section here and other sites and forums, but here it is as a whole system. The overall plan for this system has been a simple active two way with horn/waveguide HF section, taking on board ideas from both the "Econowave" project and a nod towards those older big American speakers with horns & 15" bass drivers, like Klipsch, Altec, etc. But using a modern active DSP crossover, and mostly digital sources. I've also just been switching amps and other parts in and out for fun, buying random DIY boards from the internet if I read an interesting thread, etc. I tried two other waveguides before settling on the current one. It's not particularly high end, there are a few rough edges I need to refine, but it is probably unique and I like the sound. HF section. 1.4" compression driver and waveguide, FaitalPro HF144 with 18Sound XT1464. I've got this just sitting on the woofer enclosure, for ease of trying different waveguides. The compression driver is propped on a small wooden box that holds the LPAD resistors (7dB attenuation on the HF) and protection capacitor. JLH 1969 8watt Class A stereo amplifer. These are usually 10W but I am running it at a lower voltage. This is a very simple build from a Chinese kit, using a switched mode power supply, and the enclosure is re-cycled from an old Korean amp. This is the "winter" amp, during summer I was most recently using a $6 15W TDA7297 chipamp. Crossover frequency is currently 600Hz (or was it 550?). LF Section. 15" LorantzC390X B1 Australian made bass drivers. I was checking out all sorts of US, UK, Italian and Spanish drivers.. but ended up with one made in Dandenong. These are in 140 litre pine plywood bass reflex enclosures. Drivers second hand from ebay. ConnexElectronics TA3020 V3c "Tripath" Class T amp module. In a very industrial steel PSU case as enclosure, powered with a 500VA 35v-0-35v transformer, the highest voltage this can run at without needing a cooling fan. Approximately 110W/channel. I've attached a bit of stained pine to the front to cover most of the industrial steel ugliness. Crossover & Sources. MiniDSP 2x4 crossover plus miniDIGI daughterboard, with OPA2134 opamps on the output as the miniDSP is too quiet to drive most of the amplifiers I try. This is all mounted in a rough and ready pine enclosure, with a "fine" (miniDSP software) volume control and a "master" (ganged stepped attenuator for the opamp stage) volume control. There is an analogue "guest" input on the front panel for visitors to plug in their DJ mixers/laptops/etc into, but the main sources are all optical SP/DIF. Powered by a Jaycar kit linear power supply. Input selection: optical sources selected with a mechanical optical 4 way switch, an AC-1597 from Jaycar. Main source: a "home theatre" PC running Xubuntu Linux 14.04, with an Intel i3-2100t CPU on an Intel motherboard, Antec ISK-300 case, and an SSD. The problematic Antec PSU replaced with a PicoPSU. I mostly play .flac files streamed via NFS using the Linux "clementine" media player app. Youtube and Mplayer get a lot of use as well. The audio is just using the stock optical out on the Intel motherboard. This PC is about 4 years old but works just fine, and runs extremely quiet despite it's two fans. TV - Sony Bravia KDL40 EX500 40" LCD TV. This mostly gets used as a monitor for the PC, but the optical out is hooked up for the rare TV session. DVD/CD player. An old DSE "Digitor" DVD player. Definitely not a high grade unit, not often used but it does appear to handle a lot of formats so kept around. Other bits. Interconnects are mostly DIY from Altronics and Jaycar parts. Wireless keyboard and mouse. Speaker cables and optical cables from Selby Acoustic. ALDI master/slave powerboard - this is very handy, it uses the TV as a master device and turns off the amps & miniDSP when the TV goes into full standby mode, about 15 minutes after the TV is turned off with the remote. Not such a big deal with the miniDSP and Class T amp, but great once Class A amplification was added to the mix. So the whole system (except the PC) can be powered on/off from the TV remote. I've intentionally assembled all gear with no panel lights to cause distractions, the lights on lots of gear were annoying my wife. Things still to do: I still have a lot of work to do refining the crossover, I've done some initial work with The Active Crossover Designer with good results, but I really need to dig much deeper here. I've had a lot of help and advice from the guys in the SNA DIY section, thanks! I'm not completely happy with the finish on the speaker enclosures. The third coat of stain/varnish was applied at night and I didn't see the drips and patchy bits. One day I'll haul them out for another sand and coat. But its OK. The digital source is pretty much "out of the box" Linux with Pulseaudio. Apart from verifying I'm getting unmodified 16bit/44100 for CD quality flac files, I haven't explored too far here. The miniDIGI does on the fly samplerate conversion and reclocking to 48khz so maybe it doesn't matter.

Item: Radian 745NEOPB compression drivers 1.4" Location: Sydney Price: $450 Item Condition: Very good Reason for selling: surplus Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: Perfect sonic condition for both drivers, some minor external signs of use on one (slight fading of colour on push terminals) http://www.radianaudio.com/product/745neopb/ Also have azurahorn AH425 that fit these - in fact they were made for them Pictures: Coming

Item: Altec 802-8D Horns and Compression drivers Location: Canberra Price: $1000 neg Item Condition: Cosmetically a bit rough but should be fine Reason for selling: Not needed Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: These came from the recording studio at the Canberra School of music. I am not sure how to text them as I presume I need a crossover so as to send the right frequencies through. This seems a fair price, they have been listed for up to $4000 on eBay (although that might be an optimistic seller) I can bring them to Sydney or post them - going to SydneyAugust 3-10 Pictures:

* Description: a pair of MDF speaker boxes., painted back, PA type. room for a 15" woofer (just to make it clear, the boxes have no woofers) plastic horn/waveguides noname compression drivers crossover PCBs inside. speakon speaker connectors. I have black steel grilles for the front that cover the drivers well, and all the screws for attaching the drivers and grilles in a bag. Assorted hardware (handles, polemount socket) two bass reflex ports per cabinet (8cm diam, 6cm deep) approx 67 cm high, 54cm deep, 50 cm wide these cabinets are suitable for speakers that front mount to the baffle, there is no way to open them up to rear mount. With addition of a suitable 15" PA driver they could be turned into acceptable rehearsal/party speakers. Or they could be stripped for parts. They are about 90L volume, weigh 20KG each. The speaker hole has been enlarged a bit to make room for a slightly bigger driver than the original, and the work is pretty rough so you can see where the hole was enlarged, it has left marks. These have obviously seen a bit of use, but the cabinets are otherwise sound. The original brand was "AE MBX-III Pro" but I'm not sure how much of the remaining parts are stock, as the drivers they came with were not the stock drivers. * Location: Noble Park, Melbourne, Victoria. * Price and price conditions: FREE! just come and take them please. If you throw in a gold coin I'll match it and donate both to SNA. Even if you don't I'll donate some to SNA. * Reason for selling: came free with some woofers. I just wanted the drivers. They could be Yet Another Project but really I don’t have the room for them. * Payment Methods: cash. * Extra Info: PICK UP ONLY! I've tried to sell them on ebay but it didn’t work out. I'll list these here for a week or two before trying other avenues. * Pictures

Further information: Exceptionally popular with DIY horn-speaker aficionados, the HF-108 are superbly extended & smooth performers with very uniform frequency response (from 800hz-20khz when suitably horn loaded) and excellent tonality, aided by their Keytone Polymer (i.e: non-metallic) diaphragms. Featuring an Annular Phase Plug and high sensitivity of 109dB SPL This pair is essentially as new and function as such, with perhaps 25 hours of gentle use. I purchased 4 new pairs of different make/model compression drivers to measure and perform listening tests in a pair of horn speakers I've been developing, this pair is now surplus to requirements. Includes Mounting Bolts. Throat Diameter 1" / 25.4mm Impedance 8 ohms Sensitivity (1W/1m) 109dB SPL AES Power Handling 60 Watts Program Power Handling 120 Watts Frequency Response 1.0kHz - 20kHz Recommended Crossover 1.3kHz @12 dB/oct. Voice Coil Diameter 1.73" / 44mm Winding Depth 0.09" / 2.3mm Magnetic Gap Depth 0.1" / 2.85mm Flux Density 2.1T Mounting Information Overall Diameter 3.43" / 87mm Overall Depth 1.61" / 41mm Mounting (2) M6 threaded holes 180° apart on 3" diameter Mounting (3) M6 threaded holes 120° apart on 2.25" diameter Net Weight 1.8 lb. / .8 kg. Shipping Weight 2.6 lb. / 1.2 kg. Materials Diaphragm Ketone Polymer Voice Coil Aluminum Voice Coil Former Kapton Diaphragm Shape Dome Phase Plug Design Annular Terminals Faston Magnet Neodymium Photos: