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  1. T

    new look ve after new extras

    Because posts about your car belong in the "Show off My Ride" forum.
  2. T

    downshifting use fuel?

    No, the downshift doesn't use extra fuel, assuming you shift "normally" and let the clutch do the work (and don't continue to drive in that gear - obviously, maintaining that higher RPM will use more fuel). If you respect your car, you'll use the extra bit of fuel to match the revs and ease the...
  3. T

    Alternatives to an iPod?? Suggestions please!!

    You're going with a new iRiver? Brave move. Can't say I've liked any of them since the H320, and that was years ago. Was great though, it had a SPDIF out so you could use it with an external DAC.
  4. T

    Alternatives to an iPod?? Suggestions please!!

    Anyone who honestly believes that they can hear the difference between the original CD and a 320kbits MP3 should head on over to HydrogenAudio and check out the ABX testing they do. Long story short, pretty much nobody can hear the difference on music samples. Only those who have trained...
  5. T

    Alternatives to an iPod?? Suggestions please!!

    Zen's look great on paper, but I've had a lot of build quaility issues with them - owned 4, won't buy another in the near future My current favourite player is a little Sony E-series - similar sort of scale to a Nano, but without the goddamn clickwheel, and it'll play WMA for those times when...
  6. T

    Hello - Pontiac G8 Holden VE Commodore Peerless SLS subs

    If this is the same SLS model I'm thinking of (There's a few) it'll sound OK running free air in a parcel shelf - Qts of 0.5ish is high enough to give you fairly flat response after cabin gain is taken into account - it won't sound "bassy", just nice and balanced with a bit of luck. With a pair...
  7. T

    V8 Supercars' massive US coup

    I'm on the V8 side of the fence - nice range of talents keeps things interesting, everyone in F1 drives perfectly all day, gets really dull to watch.
  8. T

    Project Cool banana :P

    I think you need to recheck the temperature scale on your iron-carbon phase diagram. Martensite requires rapid cooling from austenite, which only exists > 700 degrees C (more like 900 degrees for cast iron). (Disclaimer: I'm studying electrical engineering, so I haven't touched this since...
  9. T

    ricer of the day

    Ironic: "characterized by a difference or incongruity between what is expected and what actually is" A reference to a Daihatsu 180Y looks like stupidity, but would be an ironic statement if it were an intentional attempt to imply that Datsuns and Daihatsu's are both forgettably rubbish...
  10. T

    ricer of the day

    Which Corolla, though? Toyota have built cars with the Corolla name since the 60's.... Are you sure you're not thinking of the Daihatsu Charmant? That was built on the Corolla chassis, but it's a much bigger car than the Charade.
  11. T

    ricer of the day

    The Daihatsu 180Y? Please tell me you're trying to be ironic. For starters, it's a Datsun. For seconds, there was a 180B and a 120Y, but no 180Y. Oh, and if anyone really thinks there's serious Charade heritage in a Corolla, go and drive a Charade. You might notice that they're a) Rubbish...
  12. T

    5 speed ecotec manual box

    I believe that the getrag is technically a better box, but the stock shifter fitted to them was godawful - take a look around the site, you'll find some pics comparing it to the Billet shifter. That said, I've never driven with a Billet shifter, so all I can say is that the T5 feels better stock.
  13. T

    Best Value For Money Amp?

    Ohms are the unit of electrical impedance. A given speaker has a given impedance, which can be found on the spec sheet. There's a lot more to it than that, but that's the basics of it.
  14. T

    Home stereo drivers

    Actually, it's even worse than that, as far as I'm aware, this "new" VIFA is just some bastards who've taken up using the name. See: Jaycar and Vifa (for the Aussies and Kiwis) - Page 5 - diyAudio
  15. T

    Talking headroom

    6dB above "maximum-average" listening level, minimum. 12dB would be better. Of course, that's 4x the amplifier power and 8x the amplifier power respectively. What do I mean by "maximum-average"? I mean the average SPL when you're listening to music as loud as you ever intend to. Be realistic...
  16. T

    How Power is Drawn from an Amplifier

    I didn't say that anything was incorrect in my original post....so now I"m the one who's confused. No. Nothing like that at all, actually. Sorry, my original examples were a bit poorly worded. In reality, your input signal would be an AC source which is continuously variable in amplitude...
  17. T

    How Power is Drawn from an Amplifier

    You're probably right, but at least I know I've supplied the correct answer if anyone wants it. (EDIT: Also because I'm studying MOSFET amps at the moment in Fundamentals of Electrical Engineering. Trying to explain parts of it to people helps me keep it straight in my head, too)
  18. T

    How Power is Drawn from an Amplifier

    Oh, bloody hell, here we go again.... OK. Typical MOSFET designs are current output devices - that is, they look, to the sub, like a Voltage Controlled Current Source. The controlling voltage is the input signal. We can model this, roughly, as I(out) = g*V(in), where g is the gain of the...
  19. T

    Manual drivers

    Downshift to second, a little blip to rev match takes the stress off the gearbox. Prefer to feel like I'm in control.
  20. T

    newbie car audio question!

    OK.....I think you've described having a dual 2 ohm coils on each sub, yeah? Assuming your amp is stable for driving a 2 ohm load, the best way to hook it up would be like: | Input + | | | (+)-------(+) Sub 1...
  21. T

    HSV unveils E2 range

    Hmm. I like it less the more I see of it. That said: It's fixable. Throw the rear bumper away, yoink off the LED strips, and fix those weird black plastic bits above each nostril (put it back like it was on the original E - it can stay black, that's cool with me). The new bumper shape which...
  22. T

    HSV unveils E2 range

    Oops. Meant GTS.
  23. T

    HSV unveils E2 range

    I actually really like the new front end - the rear bumper on the sedans is ghastly, though. Looks like a Mitsubishi. And the extra highlight bits on the GTO (Edit: rather, the GTS) are a bit overdone. (But then, my favourite HSV ever is the Avalanche ute, so I guess I'm excluded from having...
  24. T

    Kenwood cd player locked

    Check that you haven't accidentally connected your speaker's negative wire to the chassis at some point, as the speaker return isn't (or rather, shouldn't be) at ground potential.
  25. T

    need another battery?

    What you really need is a soft start circuit to put a delay on the amp, so the car can crank before the amp starts drawing power. No idea if anyone sells one prebuilt for 12V supplies, but there's plenty of designs out there on the net.
  26. T

    Amp and sub questions

    Sorry, I forget sometimes that the jargon doesn't come naturally. I'd personally suggest a sealed box, they're much more forgiving, you can muck them +/- 30% and they'll usually still be fine (a fact those cheap boxes rely on - very few subs are perfectly suited to 1.5 cubic feet, but a great...
  27. T

    how many capacitors i need?

    Your amp will have a substantial (probably not substantial enough, but I digress) capacitor bank already as part of its power supply. Adding additional capacitance to this is unlikely to solve your problem, and there are resonance issues that can arise from the resulting second order CRC...
  28. T

    Amp and sub questions

    Rating products at 1% THD is a bit slack to start with, and that's assuming their numbers are accurate. Their bridged into 4 ohms figure is a little less than 2x their 2 ohm figure, so that's a good sign. The fact that their 2 ohm figure is way less than 2x their 4 ohm figure is less...
  29. T

    Should I Bridge it?

    Typically, when bridging, you'll find that most linear distortion components will cancel out (good) but that crossover distortion will be doubled (bad). That said, crossover distortion in car amps is generally pretty bad already, and most people don't notice it. That's probably because, being...
  30. T

    [NSW] WTB : Set of VX Hubcaps

    Hi everyone, Still looking, preferably someone in NSW so postage costs aren't too high.
  31. T

    Lowndes and Whincup defecting?

    I, for one, am glad - always found Skaife to be an arrogant sort, ended up supporting Lowndes despite his switch to Ford. Now I can finally stop having to explain to people that I'd like to see Lowndes win, but Holdens in second and third!
  32. T

    [NSW] WTB : Set of VX Hubcaps

    First preference: Second preference: Sorry aobut the advertising logos, they were just the best pics I could find on a quick search.
  33. T

    [NSW] WTB : Set of VX Hubcaps

    That'd be great - I'd appreciate it if you could chuck up a pic once you find them - I'd take your word on condition, but I'd like to be sure they're the ones I think they are (I saw some that I thought were VX ones on a VY the other day, and now I'm all confused).
  34. T

    Need Help......

    And, even assuming you're pushing the same overall power (say 400W into one sub, or 200W into each of a pair), and thus the same overall volume, you'll get better sound from the pair, because they'll stay further from their mechanical excursion limits (preventing damage and ugly noises, and...
  35. T

    [NSW] WTB : Set of VX Hubcaps

    Hi, ITEM: I'm looking for a full set of VX hubcaps - it's just a coincidence that the designs I like all happen to be VX designs. My preference runs as follows: VX S1 Executive VX S1 Acclaim VX S2 Acclaim VX S2 Executive LOCATION: NSW CONDITION: Used, but as I'm after a...
  36. T

    Speaker Spec's for dumbies

    Oh, cripes, I didn't even see the watts RMS thing the first time around. That version is wrong, in two ways. Let's run the numbers: Let's take an amplifier rated for 100W into 4 ohms. Since Power = Voltage Squared / Impedance, we can see that it's swinging a voltage of 20V RMS, or 28.28V...
  37. T

    Speaker Spec's for dumbies

    The "loud" button is a frequently misunderstood beast. It's simply an equalisation curve which is designed to compensate for the way the human ear works - at low SPL's, we're more sensitive to midrange frequencies than bass or high treble, and the "loudness" EQ crudely compensates for this by...
  38. T

    need amp help

    Which is of course the whole point. What a lot of people seemingly fail to realise is that the amps have a bank of capacitors in the powersupply already, so the only time another capacitor is useful is when those are sized inadequately. As a result, the capacitor should be as close to the amp...
  39. T

    fuel consumption/kms per tank - ve v8

    Shh, greenfoam, we don't talk about those here! You mean to say that there are numbers smaller than 6? OTOH, it sounds pretty good to me - my old Buick 3800 drinks about 12L/100 around town and will easily reach 14 with an enthusiastic right foot - I'd love to have the power of the 6 litre...
  40. T

    Post your car audio system and pictures

    It's funny how the people giving advice are always well spoken, and the people rejecting it write like a distressed LOLcat. Ah well.
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