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by Brian Steele
November 24th, 2021, 6:23 pm
Forum: I.C.E. / Car Audio Tech
Topic: Budget 6.5/ Now car audio advice thread
Replies: 189
Views: 6748

Re: Budget 6.5/ Now car audio advice thread

I've used the 4 ohm versions of those Silver Flute drivers. They are nice. I still have them in storage (I replaced them with Dayton RS 180P drivers a year or so ago). I haven't used the RS150Ps, but generally I've found Dayton Audio drivers to be competent. Note, if it's a 6.5" driver that you...
by Brian Steele
November 16th, 2021, 9:41 pm
Forum: I.C.E. / Car Audio Tech
Topic: Budget 6.5/ Now car audio advice thread
Replies: 189
Views: 6748

Re: Budget 6.5/ Now car audio advice thread

timelapse wrote:Steele, talk to mih thereScreenshot_2021-11-16-14-12-23-693_br.com.expertelectronics.expertx.jpg


Set the frequency scale to be logarithmic rather than linear - it will be more useful that way.

36dB steps are HUGE...
by Brian Steele
October 27th, 2021, 9:18 pm
Forum: I.C.E. / Car Audio Tech
Topic: Budget 6.5/ Now car audio advice thread
Replies: 189
Views: 6748

Re: Budget 6.5

Steele, what rta curve do you aim for? I accustomed to the Harman curve sound so I tune for that I aim for something similar, with a couple dB more bass below 80 Hz. My car-audio system can sound good, but I won't really classify it as an "SQ" system. It's a smooth-sounding system which a...
by Brian Steele
October 24th, 2021, 12:06 pm
Forum: I.C.E. / Car Audio Tech
Topic: Need advice: Porting Back Dash to avoid dropping down the back seats
Replies: 10
Views: 584

Re: Need advice: Porting Back Dash to avoid dropping down the back seats

The issue for me with that car was the location - any subwoofer placed near the rear seat sounded like crap.
by Brian Steele
October 24th, 2021, 10:31 am
Forum: I.C.E. / Car Audio Tech
Topic: Budget 6.5/ Now car audio advice thread
Replies: 189
Views: 6748

Re: Budget 6.5

What type of enclosure is your sub in? And type of vehicle? For reference, my install is in a Honda fit hatch 2007 Hyundai Tucson, two 12" Alpine Type Rs, mounted in a sealed enclosure in the spare tire well. That 200 Hz resonance is a real pain in the arse. I have to cut off the rear speakers...
by Brian Steele
October 23rd, 2021, 9:54 pm
Forum: I.C.E. / Car Audio Tech
Topic: Budget 6.5/ Now car audio advice thread
Replies: 189
Views: 6748

Re: Budget 6.5

100 hz sub im guessing. In the process of tuning still, so no curves for my system just yet. Just a question, I have tweeters on my dash.What frequency should I highpass at.I currently have them at 2k Hz At the moment, there's two filter settings on both the subwoofer and the front speakers. Subwoo...
by Brian Steele
October 23rd, 2021, 2:27 pm
Forum: I.C.E. / Car Audio Tech
Topic: Budget 6.5/ Now car audio advice thread
Replies: 189
Views: 6748

Re: Budget 6.5

True enough.But x over point at 100 hz cutting off most of your midbass.Just saying Midbass is that range between 80 and 500 Hz. If your ACOUSTIC x-over point for your speakers is at 100 Hz, then you may be losing some midbass. However in-car there is usually a BIG difference between the electrical...
by Brian Steele
October 21st, 2021, 10:12 pm
Forum: I.C.E. / Car Audio Tech
Topic: Budget 6.5/ Now car audio advice thread
Replies: 189
Views: 6748

Re: Budget 6.5

Getting good midbass involves a lot more than choosing some arbitrary electrical x-over point for your front speakers. For example, the x-over points should be chosen to ensure that a good phase relationship is established between the subs and front speakers through the x-over region.
by Brian Steele
October 3rd, 2021, 9:04 am
Forum: I.C.E. / Car Audio Tech
Topic: Need advice: Porting Back Dash to avoid dropping down the back seats
Replies: 10
Views: 584

Re: Need advice: Porting Back Dash to avoid dropping down the back seats

I tried something like that years ago with my old Mazda 323. Like most car audio attempts I tried with that vehicle, it was pretty much a disaster.
by Brian Steele
August 27th, 2021, 9:53 pm
Forum: I.C.E. / Car Audio Tech
Topic: E25: 6 15S build
Replies: 70
Views: 8069

Re: E25: 6 15S build

Yeah, ground plane measurements work out pretty well when done correctly. From the image, the only thing I'd change (if that was a ground plane measurement) would be to orient the box vertically instead of horizontally and lean it so that the top of the box was the same distance from the mic as the ...
by Brian Steele
August 25th, 2021, 8:56 pm
Forum: I.C.E. / Car Audio Tech
Topic: E25: 6 15S build
Replies: 70
Views: 8069

Re: E25: 6 15S build

shake d livin wake d dead wrote:
kavaninho wrote:^ That is not ideal at all.


Nope its not...when we went out in the open, the correct thing was done


Actually, if you were doing what's called a "ground plane" measurement, it can be quite accurate.
by Brian Steele
August 13th, 2021, 10:14 am
Forum: I.C.E. / Car Audio Tech
Topic: Time alignment (subwoofers to midbass)
Replies: 6
Views: 630

Re: Time alignment (subwoofers to midbass)

For the "final adjustment" (is there ever such a thing, LOL), I use REW and a good microphone. That's how I found out that decreasing the the delay on the subwoofers improved the output at midbass frequencies (80~200 Hz). I might still have a bit more adjustment to do as I noticed that the...
by Brian Steele
August 12th, 2021, 7:13 pm
Forum: I.C.E. / Car Audio Tech
Topic: Time alignment (subwoofers to midbass)
Replies: 6
Views: 630

Re: Time alignment (subwoofers to midbass)

Wow, 70 views and no answers yet.... :-) Well, I discovered recently that doing it just by distance measurement alone is probably not going to produce optimum results. That should be the starting point, after which reducing the delay (increasing the "distance" setting in the DSP). and look...
by Brian Steele
August 11th, 2021, 12:01 am
Forum: I.C.E. / Car Audio Tech
Topic: Time alignment (subwoofers to midbass)
Replies: 6
Views: 630

Time alignment (subwoofers to midbass)

What techniques do you use for time aligning your subwoofers with your midbass speakers in your car? Do you just do a physical measurement and plug those dimensions into your DSP, or do you do something else?
by Brian Steele
July 1st, 2021, 10:21 pm
Forum: I.C.E. / Car Audio Tech
Topic: SQ songs?
Replies: 156
Views: 39894

Re: SQ songs?

"A British Audiophile" is one of the better Youtubers out there. I came across his channel several months ago.
by Brian Steele
June 25th, 2021, 8:48 pm
Forum: I.C.E. / Car Audio Tech
Topic: Infinity KAPPA-20MX any good?
Replies: 4
Views: 1350

Re: Infinity KAPPA-20MX any good?

Wow, US$100 for a 2" driver.... This Tang-Band driver is a 2" driver with extended response and decent advertised efficiency. For $31 for Parts Express I'd be tempted to give it a shot if I was in the market for a 2" driver. And there are many more there on the PE site that might be o...
by Brian Steele
June 20th, 2021, 1:03 pm
Forum: I.C.E. / Car Audio Tech
Topic: Np300 - SQ Install
Replies: 72
Views: 8485

Re: Np300 tomfoolery

Firewall wrote:Any ideas on the easiest/quickest way to do this is appreciated. Thinking dremel with cut off disc, or tin snips (if i could find them)


Depends on how much you have to remove. A Dremel with a grinder bit or even an ordinary electric drill with a grinding wheel may be all you need.
by Brian Steele
June 20th, 2021, 1:00 pm
Forum: I.C.E. / Car Audio Tech
Topic: Np300 - SQ Install
Replies: 72
Views: 8485

Re: Np300 - SQ Install

I used to build my door speaker adapters out of wood - until I discovered what moisture does to them. Now I use a plastic wood substitute called "starboard" that's available from most marine stores. It's a bit expensive and will likely have to be screwed in place because most glues can't s...
by Brian Steele
June 11th, 2021, 12:12 am
Forum: I.C.E. / Car Audio Tech
Topic: Np300 - SQ Install
Replies: 72
Views: 8485

Re: Np300 tomfoolery

I'm guessing that since it's a van involved, there is probably no chance of someone being in the back seat, as there's no back seat :-).
by Brian Steele
June 11th, 2021, 12:11 am
Forum: I.C.E. / Car Audio Tech
Topic: E25: 6 15S build
Replies: 70
Views: 8069

Re: E25: 6 15S build

From the Orion HCCA manual... "Please Note: Due to the extremely long excursion and high temperature possibilities of this woofer, it is recommended that when the woofer is installed it be positioned so that the cone either faces upward or downward only." Jus sayin; :-) Looks like that bui...
by Brian Steele
June 11th, 2021, 12:02 am
Forum: I.C.E. / Car Audio Tech
Topic: Np300 - SQ Install
Replies: 72
Views: 8485

Re: Np300 tomfoolery

I installed my Alpine PDX-F6 in a similar way. I oriented it so that the wires faced towards the front of the car though, Not only did that ensure that they wouldn't be disturbed by an errant foot from someone sitting in the back seat, the glow from the amps was a bit more visible and gives my other...
by Brian Steele
March 18th, 2021, 11:02 pm
Forum: I.C.E. / Car Audio Tech
Topic: Did TT SQ scene die?
Replies: 37
Views: 6968

Re: Did TT SQ scene die?

I see those A pillar speaker pod thingies are very popular. I wonder how they deal with the diffraction issue though? Placing a driver in a circular baffle (in this case, a baffle that's slightly wider than the driver itself) can result in huge diffraction issues.
by Brian Steele
January 15th, 2021, 12:24 am
Forum: I.C.E. / Car Audio Tech
Topic: Did TT SQ scene die?
Replies: 37
Views: 6968

Re: Did TT SQ scene die?

COVID-19

Everything's slow :)
by Brian Steele
January 15th, 2021, 12:23 am
Forum: I.C.E. / Car Audio Tech
Topic: Sub and box advice
Replies: 5
Views: 2829

Re: Sub and box advice

4.5 cu.ft.? That's about the gross size of my POC3 TH. But that uses 1 12" driver and 1200 rms will be way too much for it. If you're look for decent outdoor SPL, two pro audio 12" drivers (that are suitable for this purpose) in a ~40 Hz vented or MLTL box that size should give some pretty...
by Brian Steele
January 13th, 2021, 12:22 am
Forum: I.C.E. / Car Audio Tech
Topic: Sub and box advice
Replies: 5
Views: 2829

Re: Sub and box advice

Depends on how silly you want to get and how much space you want to give up. Tapped horns using 15" or at 18" drivers for example will take up a bit of space, but get pretty loud if you give them enough power.
by Brian Steele
November 11th, 2020, 9:07 pm
Forum: I.C.E. / Car Audio Tech
Topic: Subwoofer for small space?
Replies: 72
Views: 18744

Re: Subwoofer for small space?

I did not even know people use point 3 above as an approach. I guess if you have capable DSP you can. IMO usually the more EQ and "DSP capability" you require after your system was built indicates poor decisions in the earlier stages whether it be driver selection or system design. That a...
by Brian Steele
November 11th, 2020, 8:59 am
Forum: I.C.E. / Car Audio Tech
Topic: Subwoofer for small space?
Replies: 72
Views: 18744

Re: Subwoofer for small space?

Oh boy, where to start. 1. Efficiency at low frequencies is largely a function of box size and tuning 2. WinISD is an inaccurate modeler for car audio designs. It does not take "cabin gain" into effect. Nor does it accurately model the effect of Le, or the effect of "semi-inductance&q...
by Brian Steele
November 9th, 2020, 10:09 am
Forum: I.C.E. / Car Audio Tech
Topic: Subwoofer for small space?
Replies: 72
Views: 18744

Re: Subwoofer for small space?

Building them in China isn't an issue. Quality control is the issue. Like when someone orders a subwoofer driver of specs A, the manufacturer sends a sample that matches the specs, and then when the buyer orders in quantity, what is received are subwoofer drivers that look like the sample but are en...
by Brian Steele
November 7th, 2020, 12:48 am
Forum: I.C.E. / Car Audio Tech
Topic: Subwoofer for small space?
Replies: 72
Views: 18744

Re: Subwoofer for small space?

passive radiator? Nope. A passively-assisted sealed alignment is basically a sealed design with a large capacitor in series with the woofer. Choose the value of the capacitor right, and you can end up with a nice boost at low frequencies. It can also help to reduce the "boom" of a high-Q ...
by Brian Steele
November 1st, 2020, 5:29 pm
Forum: I.C.E. / Car Audio Tech
Topic: Subwoofer for small space?
Replies: 72
Views: 18744

Re: Subwoofer for small space?

Note that subwoofer efficiency at low frequencies is primarily a function of box size. Peak SPL at those frequencies will depend on the driver's excursion and power handling capabilities, how much power you have on tap and of course what sort of "cabin gain" you get in your car. Given your...

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