hey guys thanks for all the great advise. Responding to Mac and Candaddy.....
Thats where they will go. halfway up the the A pillars to the centre of the mid in my car is 22". The momo catalogue talks about using the mid range extension on the xover if the tweeter and mid are at a significant distance. Two questions: 1. Where is this mid range extension switch? The xover only has switches for tweeter level and input mode (single/dual, dual I assume is for bi-amping). 2. Do I need to use this extension?
Stick the tweeters in the A pillars about halfway up and firing at the opposite head rest then cross them over pretty high.......
Makes sense. In the current stock position, the near side tweeter is over bright in the 3.15-8khz range. Attenuating these frquencies for the near side tweet helps but it hurts the solidity of the sound. So its a gain some lose some kind of thing.
Aiming speakers (especially tweeters) is really a simple thing........ you should be able to just swivel them in the cups far enough for the install you're talking about, it's free and should be mildly noticeable
I have a four hour commute, 6 days a week, plus I spend a couple of hours most nights (after playing with my daughter and putting her to bed) just listening to music. This is when the music sounds the best, no road / wind / engine noise. Neighbours think I'm senile, wife is convinced I'm going thru a mid life crisis........Quote: "you know no other woman would tolerate you, so youre fixated on this SQ thing".....:D she's prob right abt the other woman bit. But seriously how come the SQ domain is so male centric? Dont women get moved by sound?
Mcleod is right about ditching the rear fill, that was going to be my first suggestion right off.
Sorry abt the rambling. Last couple of nights I have been listening to the setup playing only the momo's up front and the sub. There is a lot more detailing in the sound, the stage is more focused.......but the surround effect is lost. Its better in some ways but very different. I keep telling myself that improving the damping, biamping and putting the tweets on the a pillar, will do the following:
1. Sound will be richer
2. Mid bass wil be fuller
3. Mids and highs will be louder and clearer as each drive will prob get more power bi-amped.
4. Soundstage will be higher, more focused and will have greater depth.
Pls let me know if the above is correct.
Currently the tweeters are at -6. The xovers are mounted behind the door panel and as such are inaccessable. A major PI the A. Is it ok to mount the xovers in the boot and the run the wires to the speakers? In stock locations the tweets are over bright at 0 and just abt ok at -3. Frankly I've got quite used to them at -6. But will try from 0 again once bi-amped.
My experience with the momo set is that bi-amping them makes a noticeable difference. I never liked them with the -6 setting..............
. If it blends well there, but not elsewhere, don't cut or boost one driver or the other to try to even it out, use your eq instead.
My $0.02 on tuning the eq settings (playing front and sub only):
My experience with the Momo's was that the tweeters have a reasonable response curve, but the mids had some dips in the response, so you end up with a couple holes in the midrange which kills some "clarity." I seem to recall that I had to cut 500hz by a lot but boost around 800 and 1600. I can't remember now, but playing with the eq above 300 hz and below the crossover frequency should help. Each install will be different, so my settings probably wouldn't work for you anyway.
1. 20hz set at 0 L&R
2. 31.5hz set at 0 L&R
3. 50hz set at -1 L&R
4. 80hz set at +1 (front hpf at 63hz 12db/oct, sub at 63hz 18db/oct)
5. 125hz set at 0 L&R
6. 200hz set at +1 for L and 0 for R. Driver and steering are on the right in India.
7. 315hz set at +1 L&R, slope 6db/oct for left and 12db/oct for right.
8. 500 set at -1 L&R. I think 500 and 315 are linked. To boost 500 you have to boost 315 too, else sound gets a serrated edge.
9. 800hz set at +1 L&R. Boosting 800 is sweeter than boosting 500 but it increases the overall brightness. Hence you have to attenuate something in the 3.15 to 8khz (depends on the CD).
10. 1.25khz set at 0. 800 and 1.25 are inversely related if you raise one you have to lower the other.
11. 2khz. Set at +1. This frequency binds the mids. On CD's that have very bright mids, I set this to 0. Set at +1, it also tells me if I have overboosted the other mid frquencies. The sound looses its sweetness and becomes harsh.
12. 3.15khz set at 0 for left and -1 for right. This is a PIA frequency. Its good for the higher end of male vocals and guitars etc but it can also cause tinny sound, harshness etc. The jury is out on this one.....how do you'll handle this frequency?
13. 5khz set at either 0 or -1. Boosting this makes vocal hollow / echo'y its like taking the vocals and stretching them. I think setting this frequency at -1 or -2 and the xover at -3 i/o -6 would help.
14. 8khz set to +1. This adds overall brightness to the highs.
15. 12.5khz set to -1. There isnt much here in any case but setting it to -1 makes the highs softer and smoother.
16. 20khz set to 0. This gives the brightness to the very top end. If I find the highs getting over bright I keep this at and reduce some other high freq. I attenuate this only as a last resort.
Would love to hear about your views on the above.
When tuning, i set everything to 0 and first set the TA, next I set the xover and slopes and the eq comes last. Whenever I have tried setting the L/R on each frequency it always ends up blowing holes into the sound balance. Is there a link to download the pink noise cd? Will try that.
The last thing I do with the eq is adjust each frequency band for proper left and right response. You can do that with an RTA very easily, but it's also possible to do it by ear with band limited pink noise.....you'll probably find that each side needs to be tweaked left or right differently at different frequencies (McLeod is familiar with this one) and once you get them all dialed in, the soundstage improves dramatically.
One last question, the momo tweeter is crossed over at 2600hz factory setting. Can this be increased to say 3.5? I feel this would clean up the highs. If yes, how and would it affect the waranty? The momo's have a 3 year warranty and I'm half way thru.
ciao and look forward to your response.