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chefscuba70

Sydney Audio Club Meeting.... Sun 14Th Oct. Genelec, Drawmer

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Hi all,

For anyone interested, your welcome to come along and join us.

The October 2012 meeting of the Sydney Audio Club sees us once again at Dence Park for an afternoon of fine music and sound and convivial company.

Each month, the Sydney Audio Club presents the finest in high end audio systems for our members and guests. It's a bit like a private audio show once a month where you can hear and discuss equipment that you might not otherwise have the chance to audition. And you can bring along your own music to test the capabilities of the system or to just share with like-minded music lovers in a friendly and relaxed atmosphere.

This month we will have a system presented by Steven Spurrier of Studio Connections Australia (refer to http://www.studioconnections.com.au). Studio Connections Australia is the Australian distributor for some highly renowned and respected brands of audio equipment. Their brands include: Genelec, Bricasti Design and Drawmer. (All the equipment on the day will be provided by Studio Connections Australia.)

This month we will have a system comprising Genelec and Drawmer products.

The speakers will be the Genelec 8260A and 8240A models (please refer to http://www.genelec.com). Genelec have been manufacturing professional studio monitors since 1978 and have recently introduced home theatre and installation product ranges.

The Genelec 8260A is a three way active system which combines a coaxial driver (MDC™) with the advanced Genelec Directivity Control Waveguide™ (DCW™), ensuring drivers couple coherently over their full operating bandwidth as well as creating coincident mid-frequency/high frequency point source. (Drivers are 3/4” tweeter, 5” midrange, 10” woofer). The 8260A features an internal digital active crossover, accepting inputs from 32 to 192kHz. Total amplifier power is 390W per speaker.

The Genelec 8240A is a two way active system which features a flow optimized reflex port that provides solid, clear and articulated low frequencies without compression, distortion or port noises. It is also combined with the Genelec Directivity Control Waveguide™ (DCW™), and has rounded edges and gently curved front and sides of the MDE™ (Minimum Diffraction Enclosure™) enclosure. (Drivers are 3/4” metal dome tweeter, 6.5” woofer). The 8240A also features an internal digital active crossover, accepting inputs from 32 to 192kHz. Total amplifier power is 180W per speaker.

The Genelec Loudspeaker Manager™ (GLM™) software manages the Genelec DSP signal processing responsible for all loudspeaker functions, such as the crossover filters, driver equalizers, driver position alignment, room response alignment, calibration and equalization related filters as well as distance compensating delays. Carefully designed DSP crossover filters with extremely steep roll-off characteristics feed dedicated power amplifiers for each of the low distortion drivers. The Genelec Loudspeaker Manager (GLM™) control network and software features adjustment of levels, distance delays and flexible room response improvement equalization with the reliable and robust AutoCal™ automated calibration system via the GLM™ control network.

We will also be featuring the M-Clock Plus AES Grade 1 Master Clock/Dual Sample Rate Converter from Drawmer (http://www.drawmer.com/products/dms/m-clock-plus-master-clock-src.php).

M-Clock Plus is a high stability master clock generator offering clock rates from 44.1 to 192kHz, coupled to two sample rate converters, which allow material to be re-sampled and synchronised to the selected high precision clock. In addition to the internal clocks, M-Clock Plus can sync to either external word clock or clocks from AES/EBU signals. Precision clock frequency measurement and display indicates the exact frequency of the selected clock, whether internal or external, to an accuracy of 2ppm.

M-Clock Plus has an external word clock input and an AES11 input which retrieves the clock from an AES audio signal. Each sample rate converter has selectable AES, SPDIF or TOSLINK inputs, with simultaneous AES, SPDIF and TOSLINK outputs. This allows many possibilities for format conversion as well as sample rate conversion. Sample rate converter #2 has inputs on the front panel for easy access. Provides user selectable word length of 16 or 24 bits with automatic dither generation – particularly valuable for 16 bit word lengths at low signal levels. There are 10 word clock outputs - 8 at the rear and 2 at the front for easy access.

Note: also of interest from Studio Connections Australia are Drawmer's HQ Precision Pre-amp / DAC and the Bricasti M1 DAC – http://www.bricasti.com/m1.html. Neither of these will be on display or available in our meeting however.

Sources will be all digital this month, sorry no vinyl. Steven will be providing an Audio Alchemy DDS Pro/DTIPro32/DDEV3.0 CD transport, which has both AES/EBU and COAX outputs. We will also have an Oppo BDP-95 player for DVD-A and BluRay discs (provided by a member) for playing members and guests music. Playing SACD discs will be possible but less desirable due to the enforced DA conversion in the player – the signal must be then later reprocessed via ADC which means there is a lot of processing.

For this meeting, both music sessions will be BYO after Steven’s demonstration session. Members and guests are welcome to offer music to share with us all. So bring along your favourite music on CD, DVD-A and BluRay. All we ask is that the music and recordings be interesting. We'll ask you to tell us a little about the artist/recording before it is played. Tracks over 6 minutes will be faded out, to give everyone a fair go.

Whether you are a novice or a seasoned veteran, you will have the opportunity to listen, learn and share your experiences with others of a similar mind.

Members and Guests welcome – we are a very friendly club so you don't need to know anyone to join us for an afternoon of fine music and sound. We will welcome you at the door.

Venue: Epping Creative Centre

Address: 26 Stanley St, Epping

Doors open 1pm

Meeting starts at 2pm

Best regards,

Tom Waters

President

Sydney Audio Club

www.sydneyaudioclub.org.au

tomwaters@sydneyaudioclub.org.au

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how did things go ? any pics from these gtgs ? :)

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Hi Al,

Yes, sorry, I've been hopelessly behind with everything. Been too much happening lately but have finally transferred and sorted out my photos.

The meeting kicked off with a talk by the presenter about speaker placement and frequency responses within a room. There was alot of detail explained with graphs displayed on the screen that got a little complicated to follow at times and raised many eyebrows as to what was being suggested as most of it went against conventional audiophile thinking.

As you can see from the photos, one debated concept was the placement of the speakers up against the back wall, which is a no no by most, but the presenter said that by doing this, you received free bass gain and explained that if the speaker was a metre off the wall, you would get a lower frequency cancellation from it bouncing off the wall and could not be corrected by equalisation, (graphs were shown of the results). The Genelec Loudspeaker Manager software corrects the bass boom and brings all other frequencies back to a flat response regardless of the rooms issues.

We got to here the difference with the EQ on and off. When off, the sound was very messy with obvious boom and no imagining. When switched on, the sound re-focused and became balanced, though this was better, I found it did veil the highs some and overall there was a lack of depth to the soundstage but as these are used nearfield in studios, it's not a consideration I guess.

Overall, the presenters talk was well liked and found to be very informative but the equipment and sound received mixed views. Some found the sound to be great and responsive, while others thought it lacked naturalness with an over processed digital feel. I think there can be a benefit with the use of EQ in difficult rooms but only when it can't be heard in the music in any way.

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As you can see from the photos, one debated concept was the placement of the speakers up against the back wall, which is a no no by most, but the presenter said that by doing this, you received free bass gain and explained that if the speaker was a metre off the wall, you would get a lower frequency cancellation from it bouncing off the wall and could not be corrected by equalisation, (graphs were shown of the results). The Genelec Loudspeaker Manager software corrects the bass boom and brings all other frequencies back to a flat response regardless of the rooms issues.

Wish I'm in SYD for this :(... Will be great to experience this in person..

The only speakers I have heard so far that seem to work well when faced all the way to the back wall are LS 3/5As (The ones I heard are from Stirling IIRC), some Audio Note speakers, vintage Tannoys and JBLs. As you said when placed too close to the backwall you will loose that "sense of depth".. Making the sound seems flat (and boring). It's a win some/loose some decision.. :(

Nice summary and pics :thumbsup: .. And that master clock (Drawmer M clock) looks interesting!!! :wub: Been looking for a master clock and now I know of one more brand to research now.. Thanks :)

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Very interesting there chef. Read with interest re using the back wall. The mission 753s I owned for years I found as recommended by the maker worked best with being 200mm from the back wall and had a great bass response that way. I guess comes back to way speaker designed to work some ate boundary designed and need that re enforcement for best balanced sound. But naturally loose little in soundstage depth. Give and take. Sounds like a great gtg there with maker explaining principles behind their design and illustrating in situ plus with benefit of eq etc.

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