anyone interested in replacing door speakers but....

axmea? · 03-17-2015, 12:35 AM

My blown ear drums will appreciate this less no matter how tempting it is to demolish the stock "upgraded" Bose that I have. Looking at the side by side shot, there is no comparison. Nice call to share it with us. Gosh I miss my old gear.

RonRizz · 03-17-2015, 06:19 PM

Quote:

Originally Posted by Corona

Ehhh… Is there a pop quiz next week on this?

I respect you guys who can speak to this audio magic. Haha I just know how to use the + / - on the HU. Match a few color wires to make it work on the back end.

Its not as complicated as it sounds.... Briefly put, (or as brief as I can make it) Human hearing is 20 hertz to 20k hertz. There are 10 "octaves" therein. (frequencies) To move up the scale one full Octave is to double the frequency. so your octaves would be 20, 40, 80, 160 hertz, and so on... up to 20,000.
Component speakers are designed so the proper frequencies make it to the proper speakers. They do this with crossover networks, or "filters"
Low pass filters leave frequencies below their point through to the speaker
High pass filters leave frequencies above their point through to the speaker
So in a typical setup, A Subwoofer will see 20 to 80 hertz. A low pass filter keeps anything over 80 hertz from getting to the Sub.
A Midrange will use both a high and a low pass filter. 80 hertz high pass, and 3200 hertz low pass. This means the Midrange will see frequencies from 80 to 3200 hertz. A tweeter will get a high pass filter at 3200 hertz, so it only sees frequencies at 3200 hertz and above, to 20k Hertz.

So in this setup, my crossover points are......80 Hertz, and 3200 hertz.
A crossover "slope" is the number of decibels a filter will allow to pass for every octave beyond that set point. they are typically at 12 decibels per octave. for example, lets say you are playing some music at 100 decibels. because your Subwoofers Low pass crossover (filter) is set at 80 hertz, your subwoofer will see frequencies above that, but at a greatly diminished amount. (in this case 12 db per octave) so your next octave is 160 hertz......100db minus 12db=88db, next would be 320hz.....88db minus 12db=76db....easy peasy.
Realize that a difference of 3db in volume is much bigger than you think.

Tadpole · 03-17-2015, 08:37 PM

Quote:

Originally Posted by RonRizz

Its not as complicated as it sounds.... Briefly put, (or as brief as I can make it) Human hearing is 20 hertz to 20k hertz. There are 10 "octaves" therein. (frequencies) To move up the scale one full Octave is to double the frequency. so your octaves would be 20, 40, 80, 160 hertz, and so on... up to 20,000.
Component speakers are designed so the proper frequencies make it to the proper speakers. They do this with crossover networks, or "filters"
Low pass filters leave frequencies below their point through to the speaker
High pass filters leave frequencies above their point through to the speaker
So in a typical setup, A Subwoofer will see 20 to 80 hertz. A low pass filter keeps anything over 80 hertz from getting to the Sub.
A Midrange will use both a high and a low pass filter. 80 hertz high pass, and 3200 hertz low pass. This means the Midrange will see frequencies from 80 to 3200 hertz. A tweeter will get a high pass filter at 3200 hertz, so it only sees frequencies at 3200 hertz and above, to 20k Hertz.

So in this setup, my crossover points are......80 Hertz, and 3200 hertz.
A crossover "slope" is the number of decibels a filter will allow to pass for every octave beyond that set point. they are typically at 12 decibels per octave. for example, lets say you are playing some music at 100 decibels. because your Subwoofers Low pass crossover (filter) is set at 80 hertz, your subwoofer will see frequencies above that, but at a greatly diminished amount. (in this case 12 db per octave) so your next octave is 160 hertz......100db minus 12db=88db, next would be 320hz.....88db minus 12db=76db....easy peasy.
Realize that a difference of 3db in volume is much bigger than you think.

You are a god Ron.

BeemaaZ · 03-17-2015, 11:04 PM

All I read is blah blah blah sound... Blah blah blah speaker.... Blah blah blah subwoofer... Blah blah blah tweeter... Blah blah blah crossover lol

Corona · 03-17-2015, 11:20 PM

Quote:

Originally Posted by RonRizz

Its not as complicated as it sounds.... Briefly put, (or as brief as I can make it) Human hearing is 20 hertz to 20k hertz. There are 10 "octaves" therein. (frequencies) To move up the scale one full Octave is to double the frequency. so your octaves would be 20, 40, 80, 160 hertz, and so on... up to 20,000.
Component speakers are designed so the proper frequencies make it to the proper speakers. They do this with crossover networks, or "filters"
Low pass filters leave frequencies below their point through to the speaker
High pass filters leave frequencies above their point through to the speaker
So in a typical setup, A Subwoofer will see 20 to 80 hertz. A low pass filter keeps anything over 80 hertz from getting to the Sub.
A Midrange will use both a high and a low pass filter. 80 hertz high pass, and 3200 hertz low pass. This means the Midrange will see frequencies from 80 to 3200 hertz. A tweeter will get a high pass filter at 3200 hertz, so it only sees frequencies at 3200 hertz and above, to 20k Hertz.

So in this setup, my crossover points are......80 Hertz, and 3200 hertz.
A crossover "slope" is the number of decibels a filter will allow to pass for every octave beyond that set point. they are typically at 12 decibels per octave. for example, lets say you are playing some music at 100 decibels. because your Subwoofers Low pass crossover (filter) is set at 80 hertz, your subwoofer will see frequencies above that, but at a greatly diminished amount. (in this case 12 db per octave) so your next octave is 160 hertz......100db minus 12db=88db, next would be 320hz.....88db minus 12db=76db....easy peasy.
Realize that a difference of 3db in volume is much bigger than you think.

I will be honest, I had to read this several times to understand the mechanics. I was getting lost in the numbers (ironically have a degree in engineering, lol). But I think I get it now. Obviously not to the level of mastery you have but it makes sense. I appreciate you taking the time. I saved this to my iPhone notepad for future reference, lol.

I am still sitting on those speakers… Need to figure out where to get them installed. Too lazy to do it myself. After doing the HU, I had my fill of electronics/wires. What should I expect to see a shop charge? Just to have an idea of whether or not they are priced fair.

Hotrodz · 03-17-2015, 11:49 PM

Thanks for the run down Mr Ron you have been repped. I get it as I have some back ground in music so it make sense to me.

I'm going to have mine installed at shop in Vegas, $75 is what he quoted!

RonRizz · 03-18-2015, 07:01 PM

$75 is not a bad price, Obviously they will differ with location. In my area, going rate would be around $50

eastwest2300 · 03-25-2015, 01:28 PM

Hey ron, thanks for posting about these speakers, Im gonna pick up a set too.. Upgrading my speakers has been on my "to do" list for a very long time. Thanks bro.

eastwest2300 · 03-25-2015, 01:45 PM

Just purchased a set of these speakers and spacers.. Im a little excited.

RonRizz · 03-25-2015, 06:50 PM

enjoy....

Hotrodz · 03-25-2015, 07:34 PM

Getting mine installed tomorrow

eastwest2300 · 03-26-2015, 12:05 PM

Quote:

Originally Posted by RonRizz

enjoy....

thank you sir.

Corona · 03-26-2015, 02:54 PM

Quote:

Originally Posted by Hotrodz

Getting mine installed tomorrow

Doing the install yourself or shop? Let us now how the install goes. Mine are still sitting in the box, lol. Need to buy those spacers.

Hotrodz · 03-26-2015, 05:55 PM

So the shop does not want to install them unless I have an amp that can push these bad boys. I don't want to argue with them as they want me to get the most out of the system and I'm ok with that. So I need recommendation on a good 4 way amp.

Corona · 03-26-2015, 10:58 PM

Quote:

Originally Posted by Hotrodz

So the shop does not want to install them unless I have an amp that can push these bad boys. I don't want to argue with them as they want me to get the most out of the system and I'm ok with that. So I need recommendation on a good 4 way amp.

Really? You still have the stock HU?

03-17-2015, 12:35 AM	#61 (permalink)
axmea? A True Z Fanatic Join Date: Apr 2012 Location: SoCal Posts: 6,235 Drives: WELL ZED PW 6MT Rep Power: 53241	My blown ear drums will appreciate this less no matter how tempting it is to demolish the stock "upgraded" Bose that I have. Looking at the side by side shot, there is no comparison. Nice call to share it with us. Gosh I miss my old gear. __________________ >MyZ's Album< NISMO Convert/ECUTEK/Takeda CAI/F.I. HFC NR CB Carbon/F.I. 34 Row Oil Cooler/4.08 Final Drive /Powertrix+Swifts/Hotchkis/SPL/Whiteline/TWM/Zoom Engineering/EVO-R/AeroJacket Vented CF Fenders + CF Spoiler/Avant Garde-WORK/NST/Morimoto Halo/STi Clear Lenses/Carbon Signal Automotive/RJM Performance/ZSpeed Clutch Flywheel CSC delete

03-17-2015, 11:04 PM	#64 (permalink)
BeemaaZ A True Z Fanatic Join Date: Sep 2011 Location: Irvine, CA Posts: 2,594 Drives: 40thAE#472 Rep Power: 508	All I read is blah blah blah sound... Blah blah blah speaker.... Blah blah blah subwoofer... Blah blah blah tweeter... Blah blah blah crossover lol __________________ SoCal 40th Meet Old & New Mods Steering Lock RECALL**** Own 40th 370Z? Get the build # and the Manuf. date here

03-17-2015, 11:49 PM	#66 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	Thanks for the run down Mr Ron you have been repped. I get it as I have some back ground in music so it make sense to me. I'm going to have mine installed at shop in Vegas, $75 is what he quoted! __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

03-18-2015, 07:01 PM	#67 (permalink)
RonRizz A True Z Fanatic Join Date: Aug 2011 Location: Pine grove, Pa Posts: 2,136 Drives: 2 feet, 3 pedals Rep Power: 6775	$75 is not a bad price, Obviously they will differ with location. In my area, going rate would be around $50 Hotrodz likes this. __________________ P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals

03-25-2015, 01:28 PM	#68 (permalink)
eastwest2300 A True Z Fanatic Join Date: May 2010 Location: South FL Posts: 90,974 Drives: '16QX70/'21 Supra3.0 Rep Power: 2684550	Hey ron, thanks for posting about these speakers, Im gonna pick up a set too.. Upgrading my speakers has been on my "to do" list for a very long time. Thanks bro. __________________ Infiniti QX70 & Toyota Supra 3.0 Premium

03-25-2015, 01:45 PM	#69 (permalink)
eastwest2300 A True Z Fanatic Join Date: May 2010 Location: South FL Posts: 90,974 Drives: '16QX70/'21 Supra3.0 Rep Power: 2684550	Just purchased a set of these speakers and spacers.. Im a little excited. __________________ Infiniti QX70 & Toyota Supra 3.0 Premium

03-25-2015, 06:50 PM	#70 (permalink)
RonRizz A True Z Fanatic Join Date: Aug 2011 Location: Pine grove, Pa Posts: 2,136 Drives: 2 feet, 3 pedals Rep Power: 6775	enjoy.... eastwest2300 likes this. __________________ P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals

03-25-2015, 07:34 PM	#71 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	Getting mine installed tomorrow __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

03-26-2015, 05:55 PM	#74 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	So the shop does not want to install them unless I have an amp that can push these bad boys. I don't want to argue with them as they want me to get the most out of the system and I'm ok with that. So I need recommendation on a good 4 way amp. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Replacing HU and door speakers	DeathByMunky	Audio & Video	38	02-09-2015 08:55 AM
Replacing door speakers -- how hard is it?	0101	Audio & Video	7	11-04-2014 01:29 PM
Replacing Stock Door Panel (Suede)	KyleBucket	Exterior & Interior	8	08-24-2012 02:45 PM
Replacing Interior Door Panels	LMBmikeZ	Nissan 370Z Warranty / Scheduled Maintenance / Servicing / Repairs	8	07-11-2012 05:14 PM
Replacing the Stock Speakers/ Non Bose	Texas370z	Audio & Video	15	04-11-2011 02:47 AM