JL AUDIO A4300 15
APPEN DIX B:
Pre cis e Freq uen cy S ele c tio n Char t
“FIL TER FREQ” AMP FIL TER
Detent Panel Actual
Number Marking Fr eq.
Full c ounter-clockwise: 53
01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
02 . . . . . . . . . . . “50” . . . . . . . . . . . . 53
03 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
04 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
05 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
06 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
07 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
08 . . . . . . . . . . . “55” . . . . . . . . . . . . 56
09 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
14 . . . . . . . . . . . “60” . . . . . . . . . . . . 65
15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
20 . . . . . . . . . . . “80” . . . . . . . . . . . . 81
21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
24 . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
25 . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
26 . . . . . . . . . . “120” . . . . . . . . . . 115
27 . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
28 . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
29 . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
30 . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
31 . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
32 . . . . . . . . . . “150” . . . . . . . . . . 177
33 . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
34 . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
35 . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
36 . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
37 . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
38 . . . . . . . . . . “200” . . . . . . . . . . 218
39 . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Full-clockwise: 225
APPEN DIX C:
A4300 Specif ications
General Speci fications:
Recommended Fuse Value: 40A
Recommended F use T ype: AF S, A GU or MaxiF use ™
Input Sections:
No. of Inputs: Two S t e r e o P a i r s
Input T ype: Dif ferential-balanced with RCA jack inputs
Input Range: Switcha ble f rom 20 0mV - 2V RMS to
80 0mV - 8V RM S
Amplifier Section:
Amplifie r T opology : C lass A/B with paten ted Absolute
Symmetry™ dua l N-Channel MOSF E T output desig n
Powe r Supp ly : Unr egula ted MO SF ET switchi ng type
Rate d Power at 12.5 V (Stere o, all ch anne ls dri ven):
45W RMS x 4 @ 4 oh ms, 75W RMS x 4 @ 2 ohms
Rate d Power at 12.5 V (B rid ged , all ch anne ls dr iven):
90W R MS x 2 @ 8 ohms , 1 50W R MS x 2 @ 4 ohms
THD a t Rated Po wer :
<0.0 8% @ 4 ohms p er ch . (20 Hz - 20 kH z)
Signal to Nois e Ratio: > 104 dB r eferred to rated po wer
(A-we ighted, 20 H z- 20 kHz n oise b andwi dth)
Freq uency Response: 1 0 Hz - 25 kHz ( +0, - 1 dB)
Damping F actor: > 20 0 @ 4 ohms p er ch. /50 Hz ,
> 1 00 @ 2 o hms per c h. /50 Hz
Slew Rate: ± 22V /µs
Power o utp ut at 14.4V supp ly vol tag e and 1% THD:
70W RMS x 4 @ 4 o hms ( 1 4.4V , 1 % T HD)
1 1 0W RMS x 4 @ 2 o hms (1 4.4V, 1 % T HD)
Rate d Power (B rid ged):
1 40W R MS x 2 @ 8 ohms (1 4 .4V , 1 % T HD)
220W R MS x 2 @ 4 ohms (1 4. 4V , 1% THD)
Ampli fier Filte r:
Filter Type: State -va riabl e, 1 2dB/oc tave But ter wor th
with con tinuou sly vari able cut off frequency selec tion
from 50- 200 Hz.
Configurabl e as Low-Pass or High-Pass. D efeatable.
Preamp O utpu t:
Pass-thro ugh t yp e, buf fere d.
Switch-selec table to pass signal from CH 1 & 2 inputs
only or fr om all four inputs ( summed) .
Dimensions(LxWxH):
1 3 .8 " x 9.25" x 2. 50 " (350mm x 235mm x 63. 5mm)
14 JL AUDIO A4300
APPEN DIX A:
Input Sensitivity Lev el Setting
Fol lowi ng t he d irec t ions be low wi l l a llow t he
in st al ler t o adjus t the i nput sen sit iv it y of eac h
a mpli f ier ch an nel pa i r simpl y and e asi ly i n jus t a
few m inute s us ing e quipme nt whic h is com mon ly
a vaila ble in ins tal la tio n ba ys.
Necessary Equipment
• Dig it al AC V olt meter
• C D w ith a s ine-wave t est tone re corde d at
0 dB re ferenc e level i n t he fr equenc y r ange
to be a mpl if ie d for th at set of c ha nnel s
( 50 H z for subwoofe r cha nne ls , 1 k Hz for a
mid ra nge appl icat ion) . Do not us e att enuate d
tes t tones (- 10 dB , - 20 d B, e tc.).
The N ine -Ste p Proc edu re
1) Disc onn ect the spea ker ( s ) from the
a mpli f ier’s spea ker out put con nec tors .
2) T ur n of f al l pro ces sin g (ba ss /treble , loudne ss ,
EQ, e tc . ) on t he s ourc e un it, pr oce ss ors (if
us ed) a nd a mpli f ier. Se t fade r cont rol to c enter
pos ition a nd s ubwoofer le vel cont rol t o 3/ 4 of
ma x i mum (if u sed t o feed t he A43 00).
3) Switc h the “Inp ut V oltage” swit ch to “ Low”
a nd tu rn t he “Input S ens .” cont rol a l l t he
way dow n.
4) Set the s our ce uni t v olume to 3 /4 of ful l
volume . Th is w i ll a l low for rea sona ble gai n
ov erlap w ith m oderat e c lip pin g a t fu ll v ol u me.
5) Usi ng t he cha r t on t hi s page , det er mi ne t he ta rge t
volta ge for input s ensit iv it y adju st ment ac cord ing
to t he nomi na l i mped a nce of t he sp ea ker s ys tem
con nec ted to t he a mpl if ier out put s.
6) V erif y that you ha ve disconnecte d the spea ke rs
before pr oce ed in g. Play a t ra ck w it h a n
appropr iate si ne wave (wit h in t he f requ enc y
range to be amplified b y the A 430 0 ) at 3/ 4
source u nit v olume.
7) Conne ct t he AC voltme ter to t he sp ea ker out put
co nnect o rs of t he a m plifier . If t he channel
pair is operating in st er eo, it is only necessar y
to me asure one channel. If bridg ed, make sure
you tes t t he volta ge at th e corr ec t conne ct ors
(L+ a nd R– ).
8) In crease t he “Inp ut Se ns.” c ont rol u nti l t he
target vol tage is o bserved with the v oltmete r .
9) Once you have a djuste d t he A430 0 to its
ma x imu m low-d istor t ion out put level ,
recon nec t t he sp ea ker ( s). The “I nput Sen s. ”
con trols can no w be ad justed do w n wa r d if t he
a mpli f ier requ ire s atte nuation to a chie ve t he
desired system ba lance.
Do no t increase any “ In put Sens.” setting fo r
any amp lifi er chann el o r ch ann el pair in the
sy stem be yond the m a xi mum le vel es tabl ishe d
durin g this proced ure. Do ing so will res ult in
audible d ist ort ion and p ossi ble spea ke r da mage .
It wi l l be ne ces sa r y to re- adjus t the
“Input S ens .” for the a f fec te d cha nne ls i f any
equ a li ze r boo st i s act iv ated a f te r set t i ng t he
“Input S ens . ” wi th this pr o ce dur e. Thi s a p pli es
to any EQ boos t cir cuit, inc ludin g so urce unit
to ne contr ols or EQ circuits. EQ cuts w ill no t
requ ire re -adjust ment .
Due to ongoing product developmen t, all specifications a re subject t o
change without notice.
Nom.
Impedance
T arget AC V oltage
Stereo Bridged
8
13.4 V 26.8 V
6
13.4 V 25.6 V
4
13.4 V 24.6 V
3
12.8 V not recommended
2
12.3 V not recommended