A brief bunch of words and a picture
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A brief bunch of words and a picture
What you have to share
http://img.fark.net/images/cache/850...A&f=1432526400
http://i191.photobucket.com/albums/z...ps66d91d44.jpg
http://www.pakwheels.com/forums/atta...worthless1.jpg
http://memecrunch.com/meme/K2J0/pics....jpg?w=640&c=1
http://i568.photobucket.com/albums/s...psf4c01222.jpg
http://i1050.photobucket.com/albums/...ps73b36e33.jpg
See Bob's got something for us !Quote:
Originally Posted by Hic
Attachment 4674
Attachment 4675
Has a certain romanticism , belonged to Audionutz , nowadays amps don't have 10 guage wires coming out of them. The newer amps are class D and connect with smaller wires, along with more power , lower price.
This 800SW powered 1/2 of a dual voice coil Cerwin Vega subwoofer. A Ford van held 24 amps ( 800SW ) and 12 subs it was driven by John Yi who manufactures amps and processors now.
Attachment 4886
Attachment 4887
Attachment 4888
Attachment 4890
A fan shroud covered each amplifier and provided cooling. At one time , I believe the van was transported to europe.
Linear Power 8002 was model with some mods .
Linear Power 8002 was model with some mods , 8.25 k . heat sinks and round wires.
Anyone else got stuffs ?Quote:
Originally Posted by Hic
bikinpunk on Audionutz - Steve is a really nice guy. Neat to see this and be able to tie it to someone I've met and have talked with in person at shows. :cool:Quote:
Originally Posted by Hic
About a decade at least for this guy
Q
1) topology
2) channels
3) brand
Attachment 5082
Old school is the only school , Woodford Reserve and frisbee go great with big ass wires ! :-)
To each their own.
Attachment 5103
JL Audio 500/5
I like the pretty colors ! An EE ran 1 of these in his system for years , regulated power supply , test revealed all good until 9 volts in car battery and then the sweep could not be completed. Motherboard and daughterboards helped run this beauty !
ZED audio, Stephen Mantz ol school sweetness :-)
Attachment 5117
Made to put a smile on your face !
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Attachment 5138
Rockfordfosgate 5 channel
Attachment 5141
Handcrafted in USA by Zed Audio , 4 channel , revision 665.
One of my early favs , I had MB Quart components and a 12" MB Quart PWC sub all run off my Boss amp in a 1968 Chevy biscayne with a 327 topped w/4 barrel rochester carb , affectionately known as quadrijunk, 2 speed turbo-hydramatic tranny a favorite at 1/4 mi race tracks.
When this was sold ^^^ , the Boss amp came with a 6 yr warranty ! I guess when you know how they're made , , , and the 2 Ohm stable stereo :D !
... The africaaneer built for Planet Audio/Boss from 1997 to 2000 ...
http://www.caraudiojunkies.com/attac...2&d=1464576446
Mono amplifier , 100 watt Zuki
The Zuki 100 watter is available from Pat for $2,000 @ZukiAudio
hifonics XX Colossus mono , Stephen Mantz designed this and Steven Head owned it. Channels A/B could be bridged @ 2 Ohms
Quote:
Originally Posted by Hic
DPS500 / series 218 , modded and bench tested less than a decade ago - so , just after the dinosaurs went extinct.
Attachment 5555
Linear Power / high voltage amplifier 150 watt with power , thermal and current indicator lights or protection.
Bypass/Lowpass/Highpass selector. Inputs / left , right w/input level adjuster . Output / left , right stereo and can be summed for mono ,
12v & gnd + rem , 40 amp fuse. Class AB
You mean this one ? Then yeah , 8 toroidals !Quote:
Originally Posted by Hic
Are you talking to yourself? In your OWN thread?
That's the way I answer an email !
How much power will your amp for subs make, Kendal ?Quote:
Originally Posted by Notloudenuf
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The Zuki 100 makes extreme amounts of power ! [ although only rated 100 watts ]. Which is probably why Jim B used one !
Quote:
Originally Posted by Hic
Carried nothing on am warrant towards. Believe fat how six drawing pursuit minutes far. Same do seen head am part it dear open to. Whatever may scarcely judgment had. He an thing rapid these after going drawn or. Timed she his law the spoil round defer. In surprise concerns informed betrayed he learning is ye.
Doth fair damsel belie eor morn or bird? :puter:
Cerwin - Vega's " Stroker Pro " up above/preceding post.
Features:
Bias adustment - tunable for sound quality ( SQ ) or sound pressure level ( SPL )
Dual Gap Technology - allowing maximum linear excursion
Heat sinking frame - higher power handling and lower distortion
Front spider - stabilizes voice coil in extreme excursion
Dual lower spiders - optimum suspension linearity for SQ
Ported enclosure optimum ( 1.2 cu ft )/ Sealed enclosure optimum ( 0.7 cu ft )
Fs - 27 Hz
Xmax 40 mm
2 ohm dual voice coil
sensitivity 84 dB
My Phoenix Gold Prototype MS series PowerGrid
That looks cool as hell, KillerBox. How much time did you put into it so far?Quote:
Originally Posted by Notloudenuf
saw this yesterday in an older Chevy truck. No idea what year but I'm guessing 80s. And like most things Chevy....the radio did not work. :rolleyes:
https://i.imgur.com/IYOHpLz.jpg
They made that interior into the mid 90's. Aftermarket dash kits relocated a single din to the cupholder area in the middle of the dash.
Anyone remember : Stillwater Designs?
I have a gray amp (500 si ). NOS w/3 - 40 amp fuses , 250 W per channel !
Ics didn`t load ?
Basically, An old stereo amplifier (Kicker)with box, minus any connection marks on screws/rca inputs or outputs, power/ground/remote/ and four speaker connection terminals
Stillwater, OK 74075
5021 N. Perkins Rd.
Made in U. S. A.
18" L x 7 1/4" W , { heatsink fins an 1 1/2" tall }
Why would I put a neodymium magnet on the butt of my fiQ 12 inch sub ?
https://www.grainger.com/product/GRA..._vc=IDPPLARECS
Quote:
What does the N35, N40, N42, N45, N48, N50, N52 grade mean? Neodymiummagnets are graded by the maximum strength they can be magnetized to. The higher the number the stronger the magnet is, however the higher the number the more brittle the magnet becomes as well.
some speakers have a "bias" adjustment !
Quote:
BMagnetic flux density in gap, in Tesla-meters (TM)
BL
The magnetic strength of the motor structure.
The cross product of the magnetic gauss in the gap ‘B’ with the effective conductor length ‘L’. BL is measured in Tesla meters or Newtons per Ampere (same units)
BLē/Re
Most manufactures will not spec this number, however we feel it inappropriate to omit it.
Quote:
Originally Posted by Hic
It has nothing to do with T/S parameters . . . I put it there because it stuck . . .Quote:
B
Magnetic flux density in gap, in Tesla-meters (TM)
BL
The magnetic strength of the motor structure.
The cross product of the magnetic gauss in the gap ‘B’ with the effective conductor length ‘L’. BL is measured in Tesla meters or Newtons per Ampere (same units)
BLē/Re
Most manufactures will not spec this number, however we feel it inappropriate to omit it.
BL is the actual cross product of the magnet field B with the conductor length L. It is not a scalar, but rather a vector. Combine this vector with the current I and you’ll get exactly the force (up or down according to the DC or AC input). But with the way amplifiers are designed, the current I of the speaker is never constant, only the voltage is. It is also not entirely important to know what the force is because is changes so rapidly. In any event, the BL squared divided by the resistance of the voice coil Re in fact gives us a generic force factor in newtons squared per watt. This number is relative for all speakers and the higher the number, the more force a motor can invoke on a cone with the same input power.
Its important to distinguish that BL and Re are related much like inductance and Re are. 32Tm over 8 ohms is identical to 16Tm over 2 ohms, namely 128 Nē/W. All other things equal (moving mass and cone size in particualr), A higher BLē/Re will increase the sensitivity of the driver which is a generally a very good thing.
BL Curve
A graph of the magnetic strength of the speaker's motor structure across the frequency spectrum of the speaker's operating range.
C
Propagation velocity of sound at STP, approx. 342 m/s
Cas
Acoustical equivalent of Cms
Cmes
The electrical capacitive equivalent of Mms, in farads
Cms
The driver's mechanical compliance (reciprocal of stiffness), in m/N
D
Effective diameter of driver, in meters
DUMAX
A driver measurement system that can, among other things, measure how far a driver's cone can travel while still working in a linear fashion.
F3
-3 dB cutoff frequency, in Hz
Fb
Enclosure resonance (usually for bass reflex systems), in Hz
Fc
System resonance (usually for sealed box systems), in Hz
Fs
Driver free air resonance, in Hz. This is the point at which driver impedance is maximum.
L
length of wire immersed in magnetic field, in meters
Lces
The electrical inductive equivalent of Cms, in henries
Le
This is the voice coil inductance measured in millihenries (mH). The industry standard is to measure inductance at 1,000 Hz. As frequencies get higher there will be a rise in impedance above Re. This is because the voice coil is acting as an inductor. Consequently, the impedance of a speaker is not a fixed resistance, but can be represented as a curve that changes as the input frequency changes. Maximum impedance (Zmax) occurs at Fs.
Ms
The total moving mass of the loudspeaker cone.
Mmd
Diaphram mass, in grams
Mms
The driver's effective mechanical mass (including air load), in kg
n0
The reference efficiency of the system (eta sub 0) dimensionless, usually expressed as %
p
(rho) Density of air at STP 1.18 kg/m^3
Pa
Acoustical power
Pe
Electrical power
Q
The relative damping of a loudspeaker
Qa
The system's Q at Fb, due to absorption losses; dimensionless
Qec
The system's Q at resonance (Fc), due to electrical losses; dimensionless
Qes
The driver's Q at resonance (Fs), due to electrical losses; dimensionless
Ql
The system's Q at Fb, due to leakage losses; dimensionless
Qmc
The system's Q at resonance (Fc), due to mechanical losses; dimensionless
Qms
The driver's Q at resonance (Fs), due to mechanical losses; dimensionless
Qp
The system's Q at Fb, due to port losses (turbulence, viscousity, etc.); dimensionless
Qtc
The system's Q at resonance (Fc), due to all losses; dimensionless
Qts
The driver's Q at resonance (Fs), due to all losses; dimensionless
R
Ripple, in dB
Ras
Acoustical equivalent of Rms
Res
The electrical resistive equivalent of Rms, in ohms
Revc
DC voice coil resistance, in ohms
Rg
Amplifier source resistance (includes leads, crossover, etc.), in ohms
Rms
The driver's mechanical losses, in kg/s
SAF
Spouse Acceptance Factor. Basically, a rough measurement of what you can get away with in the house before your better half (who usually controls the finances as well) raises a fuss.
Sd
Effective piston radiating area of driver, in square meters
SPL
Sound Pressure Level, usually measured at 1 watt, at 1 meter in front of the loudspeaker
SQL
Term used to define a speaker or system with a balance between focuses on SPL and SQ.
SQ
Sound Quality. A term that refers to a focus on accuracy and transparancy as opposed to a focus on how loud the speaker or system can get.
Vas/Cms
"Equivalent volume of compliance", this is a volume of air whose compliance is the same as a driver's acoustical compliance Cms (q.v.), in cubic meters. "Vas represents the volume of air that when compressed to one cubic meter exerts the same force as the compliance (Cms) of the suspension in a particular speaker. Vas is one of the trickiest parameters to measure because air pressure changes relative to humidity and temperature — a precisely controlled lab environment is essential. Cms is measured in meters per Newton. Cms is the force exerted by the mechanical suspension of the speaker. It is simply a measurement of its stiffness. Considering stiffness (Cms), in conjunction with the Q parameters gives rise to the kind of subjective decisions made by car manufacturers when tuning cars between comfort to carry the president and precision to go racing. Think of the peaks and valleys of audio signals like a road surface then consider that the ideal speaker suspension is like car suspension that can traverse the rockiest terrain with race-car precision and sensitivity at the speed of a fighter plane. It’s quite a challenge because focusing on any one discipline tends to have a detrimental effect on the others. "
Vd
Maximum linear volume of displacement of the driver (product of Sd times Xmax), in cubic meters.
Xmag
Excursion limit due to the magnetic limitations of the driver's motor. Xmag is defined as the displacement at which the BL product has fallen to 70% of its value at the cone's rest position.
Xmax
Linear (one-way) travel of the cone. Xmax is used to determine the maximum linear SPL capability of the driver, and can be defined in a number of ways. The DUMAX definition is objectively the best one, and it is defined as the shorter of the Xmag and Xsus values, in each direction of cone travel. This definition is more useful than the older definition of Xmax, which was solely dependent on the length of the voice-coil vs. the length of the gap.
Xmech
Maximum physical excursion capability of the driver. Exceeding Xmech normally results in damage to the driver.Excursion limit due to the driver's suspension.
Xsus
The point at which the compliance of the suspension has decreased to 25% of the value at the cone's rest position.
Zmax
This parameter represents the speaker’s impedance at resonance.
https://www.khanacademy.org/science/.../v/magnetism-2
Magnetic force on a chargeQuote:
shows how to find the size and direction of the magnetic force using F=qvB and the right hand rule.
Listenin to Coldplay recorded in Vista Alegre Bull Ring , Madrid 2003.
Listened to John Mayer Any Given Thursday recorded in Oak Mountain Amphitheater Birmingham , Alabama on September 12, 2002
If you have ever stood in front of the stage and heard the kick drum, that`s what this fiQ sounds like!
Played some LZ, Rush 30, Aerosmith . . . Yup fiQ is killin it !
[This one with a magnet on butt is hardest driving sound quality driver !
My 800SW drove one-half of a CV dual voice coil sub (24 amps and 12 subs).g
Quote:
Originally Posted by Hic
Attachment 7882
A 1 ohm dvc connected to carbon fiber cone ( digital designs 12" G model )