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glennb

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About glennb

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    Melbourne
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  1. Item: Cambridge Audio 840A V2.0 Integrated Amp Location: Essendon Price: $500 ONO. $400 Have a an AVR box it will fit in with appropriate packaging so postage is an option at cost. Item Condition: Fair. Some minor scuff marks on remote and scratch on screen (see pics), but everything is working. Reason for selling: NLR Payment Method: Pickup - Cash, EFT, Extra Info: Have gone to a surround AVR so this is no longer needed. Has been doing light duties in a 2 channel system but packs a fair amount of power and it's HEAVY at 15kg. Original owner (pet free, smoke free home) and bought from CAV. 120W output into 8 Ohms, 200W output into 4 Ohms Zone A & B speaker outputs (zone 2) Preouts for active subwoofer Balanced Inputs Pictures: Scratch on screen visible in pic below.
  2. Item: Cambridge Audio 840A V2.0 Integrated Amp Location: Essendon Price: $500 ONO. Have a an AVR box it will fit in with appropriate packaging so postage is an option at cost. Item Condition: Fair. Some minor scuff marks on remote and scratch on screen (see pics), but everything is working. Reason for selling: NLR Payment Method: Pickup - Cash, EFT, Extra Info: Have gone to a surround AVR so this is no longer needed. Has been doing light duties in a 2 channel system but packs a fair amount of power and it's HEAVY at 15kg. Original owner (pet free, smoke free home) and bought from CAV. 120W output into 8 Ohms, 200W output into 4 Ohms Zone A & B speaker outputs (zone 2) Preouts for active subwoofer Balanced Inputs Pictures: Scratch on screen visible in pic below.
  3. Do you have boxes and interested in shipping to VIC? If so, i'd be interested at the asking price. cheers Glenn
  4. Thanks for your interest La_Aguja. I did think of using a potentiometer, but past experience has shown that these can be very touchy, and the contact within the Pot could be an issue down the track. Also, as we are talking about a very small range (0.5 Ohm) making a big difference, it would be difficult to get it accurate and matched to both speakers. The boxes are about as "dead" as they will ever be. The curved internal sides (18mm thick) and bracing should limit the resonance and i've also lined the internals with bitumen tape as well. Funnily enough, they didn't sound too bad in their original boxes (12mm chipboard) without any bracing, baffles, etc, which would have had a significant resonance effect. Would be interesting to see what a X-over upgrade alone would achieve with a pair of original speakers.
  5. Just checked and Google Sketchup has the ability to give the area of the cross-section. Cross-section internal area x height = volume. So you just need to do it in Sketchup to scale and go from there.
  6. So i got round to changing the resistors the other day and it's made a positive improvment in the sound. Has taken a lot of the harshness out of the sound, although it's still a fair way from crystal clear, but this is room factor as well. I went from the original 3.0 Ohm res to a 3.3 Ohm. Still debating if I should increase it further to 3.5 ohm though (now I see the advantage of external Xover's )
  7. Interesting that you changed the resistors Bob, as this is the only component that I've carried over from the original Xover. I might have to play with this to see if it helps, as speaker placement doesn't do much for my room.
  8. So i've settled the system in a bit over the last couple of weeks, but i'm still not 100% happy with the sound within the room, as it's still quite a bright sound and lacks a lot of mids-bass from the KEF drivers, which i wasn't expecting. This is particalurly evident when watching TV, as sibilance is easily heard during news services etc. Music also becomes fatiguing quite quickly due to the brightness. Adding a sub would only help the bass, not the mid tones, so not really an option. System: HDTV - Strong HD STB Music - Logitech Squeezebox Touch with mix of mp3 and uncompressed FLAC / WAV. AMP - Cambridge Audio 840A V2 Speakers - see above I know part of the problem is the room itself as it's all hard surfaces, polished floorboards, not much furniture, and quite big. I'm looking into getting a largish rug to put on the floor infront of the speakers which should help a bit, but other than that, there isn't much else i can do with the room due to WAF issues. So last weekend i swapped my MA RS8 speakers into the room to check that the Amp wasn't adding to my woes, and noticed an immediate improvement (even the wife commented that it sounded better). So that leads me to conclude that my first speaker build isn't as good as I hoped it would be. Questions: Is it possible to tame the brightness by tweaking the speakers (more/less stuffing, mods to Xover, etc) and if so, where do i start? Alternatively, i'll start saving for some better speakers
  9. Thanks guys. It was a first effort at building speakers and i'm reasonably happy with them. As many others here will probably agree, we are our own worst critics when it comes to DIY, so i can obviously see where I could do a lot better, but once you stand back from them (and squint a bit) they look pretty good I need another project though now.
  10. Thought i'd stick a few pictures in here of my finished project. More details in the KEF Carina II re-build thread if anyone is interested. [ATTACH=CONFIG]32500[/ATTACH] [ATTACH=CONFIG]32501[/ATTACH] [ATTACH=CONFIG]32502[/ATTACH] [ATTACH=CONFIG]32503[/ATTACH]
  11. [ATTACH=CONFIG]32404[/ATTACH][ATTACH=CONFIG]32405[/ATTACH][ATTACH=CONFIG]32406[/ATTACH] Learnings: - Veneer is a lot harder than it looks. They are not too bad from a distance and in the photos, but in reality they are no where near as smooth to touch as the proper timber. Would look at getting the iron on veneer next time, or just going with proper timber of some sort. - Lack of magnetic shielding and CRT TV's don't mix Not a huge issue as it's only noticable in the corners on one side of the TV and only if you are looking for it. Alternatively, this could be an excuse to upgrade the tele . Although if I do that, the speakers won't fit on the cabinet thing, so will need to make a set of floorstanding speakers then... heheh. - sound isn't great at present for TV through the set top box as it sounds really bright with sibiliance coming through quite strong at lower listening levels and boomy at higher levels. Room size is ~12m long by 6m wide in total and all shiny surfaces, so it's probably the room more than the equipment. Room sounds boomy and bright with just having people talking in it for example. Listening to streamed music over the Squeezebox touch is better quality and fills the room better, so it's doing what it's supposed to. Feel free to point out anything else i should have learned in the process as i'm pretty sure that i'll need another project before too long.... cheers Glenn.
  12. I finally finished the cabinets to an acceptable level (although they are far from perfect) and have had them up and running in the living area for the last week now. Thought i'd better update this thread and post my pics. Crossover re-building (excuse my soldering skills please ). Original Xover next to it for size reference. [ATTACH=CONFIG]32394[/ATTACH] [ATTACH=CONFIG]32395[/ATTACH] [ATTACH=CONFIG]32396[/ATTACH] You can see that i've lined the inside of the cabinets with bitumous tape stuff as well as the speaker recesses to seal the whole lot. It has a woven plastic finish on it, so it's not sticky on the exposed surface. These were offcuts from work, so a no cost inclusion for me. Finished with 3-4 layers of Satinproof finish with sanding inbetween applications. [ATTACH=CONFIG]32397[/ATTACH] [ATTACH=CONFIG]32399[/ATTACH] [ATTACH=CONFIG]32400[/ATTACH] [ATTACH=CONFIG]32401[/ATTACH] And finally, in position and all hooked up. [ATTACH=CONFIG]32398[/ATTACH] [ATTACH=CONFIG]32402[/ATTACH]
  13. I used a polyurethane glue for my cabinets (and PVA in places) and found that the poly product expands as it sets, so for a clamped joint, it filled in any gaps by itself. Only thing is that sanding it back doesn't get a nice finish on larger gaps, due to the bubbles in the finish (vs PVA for example).
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