Tacotunes.com ReCurve EZQ User manual

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T A C O T U N E S . C O M
ReCurve EZQ
Owner’s Manual
Toyota Factory Stereo Integrat on and sound opt m zat on made easy.
Tacotunes.com has gone green . . . documentat on s now onl ne.
FOR 12V NEGATIVE GROUND USE ONLY

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T A C O T U N E S . C O M
Tacotunes.com would l ke to thank you for purchas ng the ReCurve EZQ. We truly
apprec ate your bus ness. Th s manual s ntended to g ve you a broad overv ew on how to
nstall, setup and tune your ReCurve EZQ. Please be sure to rev ew nstallat on v deos and
read th s manual before you beg n your nstallat on. A l ttle plann ng w ll go a long way!
After years of customers ask ng us how to keep the r stock head un t and add an amp(s), the
EZQ was developed over a 3 year per od to work w th Toyota’s head un ts and the r nternal
d g tal s gnal processor (DSP). Each veh cle manufacturer has a l ttle “tw st” to the r DSP and
how they w ll “tune” the factory stereo. Th s product was developed w th your Toyota n
m nd. Add t onally the turn key plug and play nstallat on for your Toyota makes th s the
eas est and fastest way to add an amp(s) to your stock head un t.
Before you beg n your nstall you want to:
1. Plan the mount ng locat on of your EZQ
2. Plan the mount ng locat on(s) of your AMP(s).
3. Plan for the speakers and subs you w ll be us ng n your nstallat on.
4. Rout ng your s gnal / power w re com ng from your stock head un t to the Recurve
EZQ.
5. How to w re up the ReCurve EZQ
6. Reg ster your EZQ w th n 30 days of purchase to extend your warranty.
http://www.tactounes.com/warranty
Tools you w ll need to setup the ReCurve EZQ.
1. Inexpens ve Voltmeter
2. W re str ppers
3. CD w th test tones, you can download them for free from our webs te or purchase a
d sk from our webs te.
4. Small screwdr ver
5. Dr ll / screwdr ver to mount the recurve.

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ReCurve EZQ qu ck setup
1. D sconnect your car battery before perform ng any electr cal upgrades.
2. Remove your stock stereo / head un t.
3. Install ReCurve EZQ w re harness system to your stock stereo. ( f ava lable see v deo
for your Toyota)
4. Mount the ReCurve EZQ n an access ble locat on. (see example nstalls for some deas
on where to mount your ReCurve EZQ and amp(s)
5. Set ALL adjustment knobs to 12:00 O, clock (stra ght up)
6. Set the sub nput sl der to F/R nput.
7. Connect ALL w res com ng from the ReCurve EZQ harness. REGARDLESS of your
conf gurat on ALL s gnal w res com ng from the head un t v a the ReCurve EZQ w re
harness MUST BE CONNECTED. S mply match the colors on the harness to the labels
on the ReCurve EZQ.
8. DO NOT, connect the ReCurve EZQ to your amp(s) unt l you have performed the n t al
setup on the ReCurve EZQ. Th s ncludes the remote turn on w re (blue n most cases)
or the RCA cables.
9. Download the test tones from the ReCurve s te at http://tacotunes.com/recurve.
Create a CD of WAV f les do not convert to MP3 or AAC. MP3 w ll ntroduce no se nto
the system we do not want dur ng the n t al setup phase.
10. Play test tone and adjust nput / output ga n knobs to obta n 4.0 volts from front, rear
and subwoofer outputs. Regardless f you are go ng to do speakers and or sub, you w ll
want to set the output on all 6 channels.
The ReCurve s now ready to be connected to your amp(s). Keep n m nd some amps may
requ re lower or h gher nput sens t v ty. You can eas ly adjust the ReCurve EZQ for more /
less voltage. Most of your h gher end after market head un ts w ll prov de 2 – 4 volt RCA
(s gnal) output to your amps. The ReCurve EZQ w ll prov de a user def nable output.
However, 4 volts s pretty common output that seems to work w th a major ty of amps.

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ReCurve EZQ

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Mount ng the Recurve n your Toyota:
Mount ng your ReCurve EZ and amp(s) should be planned ahead. You w ll want to be sure
you can ga n access to the knobs on your ReCurve EZQ and amp(s). In most cases we try to
nstall the amp(s) under the dr ver s de seat and then the passenger s de seat. We have
some example nstallat ons onl ne for your part cular Toyota. In the Toyota Tacoma and
Tundra we generally recommend mount ng the ReCurve ON the seat f t folds down or
under the rear seat f t folds up. Cars & SUVs depend on your accessor es and opt ons.
Example th rd row seats or covers.
The ReCurve s NOT water res stant so be sure to mount t n a dry place . . keep n m nd that
dr nks are often sp lled n veh cles. Also, try to keep t away from hot or conf ned areas that
trap heat.
NOTE: 5 channel amps (Speaker and subwoofer amp) have come a long way n recent years.
The days are two amps are becom ng a th ng of the past for most nstallat ons. Don’t get us
wrong, there are st ll plenty of mult ple amp setups that make sense. Just depends on the
amount of power you are look ng for ☺
☺☺
☺.
Speakers and subs, be sure to check out our v ds on how to select speakers and subs for your
Toyota. For some Toyotas we have VERY deta led nformat on on what f ts along w th
deta led nstallat on v deos. We are always offer ng g ve always to folks that prov de
DETAILED nstallat on p ctures of Toyotas we have not yet documented a FULL nstall.
Install ng and Rout ng the ReCurve W r ng System:
Rout ng the ReCurve w r ng system from the head un t to your ReCurve EZQ s fa rly s mple.
Aga n, refer to nstallat on v deos and p ctures of deas. Just be sure the w res are not go ng
to nterfere w th any mov ng parts. .e., brake, gas pedal, steer ng wheel, glove boxes etc . .
n most cases we recommend that you DO NOT run any of the ReCurve w res near the dr ver
s de area. If necessary just be sure to route w r ng away from all mov ng parts.
W r ng up the ReCurve EZQ:
W r ng up the EZQ s very s mple. We have color coded every w re to nsure you do not have
any problems. In add t on, the ReCurve EZQ s clearly labeled to match each w re com ng
from the stock head un t. You w ll str p away roughly ¼” of w r ng and then nsert nto the
suppl ed w r ng connectors. You can watch th s v deo for more nformat on on how to make
the connect ons:

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www.youtube.com
You w ll not ce after you connect all the ReCurve w res com ng from the head un t, that the
Remote Out (AMP) – BLUE s go ng to be unpopulated. Generally your amp nstallat on /
w r ng k t w ll ncluded at least 17 feet of blue w re. Th s blue w re w ll run from the ReCurve
EZQ to the amp(s). Th s blue w re sends a s gnal and tells the amp(s) to turn on.
NOTE: Be sure to check out our nstallat on k ts. They nclude WAY more than a standard
nstall k t and makes your nstall go much faster and eas er.

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ReCurve EZQ Overv ew
L ne Out - Speaker Connect ons:
+ R ght Front – Gray W re (Passenger S de)
- R ght Front – Gray / Black W re (Passenger S de)
+ Left Front – Wh te W re (Dr ver S de)
- Left Front – Wh te / Black W re (Dr ver S de
+ R ght Rear – Purple W re (Passenger S de)
- R ght Rear – Purple / Black W re (Passenger S de)
+ Left Rear – Green W re (Passenger S de)
- Left Rear – Green / Black W re (Passenger S de)
Power Connect ons
Ground – Black W re
12V+ - Yellow W re
Remote In - Red
NOTE: All the w res ABOVE are ncluded n the ReCurve EZQ w r ng system. The blue w re
below s USUALLY ncluded w th an amp nstallat on k t.
Remote Out (Amp) – Blue W re – Th s w re w ll run to your aftermarket amp(s). Most amps
have a “remote” nput. Th s s gnal w ll tell the amp to “turn on” when the ReCurve powers
up.
Line Out
Speaker Inputs
Power
Input / Output

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RCA Input / Output
RCA Input / Output:
The ReCurve EZQ s setup w th a total of 3 RCA nputs (left hand s de of Recurve EZQ) and 3
RCA outputs (r ght hand s de of ReCurve EZQ). The major ty of our appl cat ons w ll NOT use
the RCA nputs. The RCA nputs w ll be covered n another user manual /stereo
conf gurat on (JBL equ pped Toyota’s). The 3 RCA outputs w ll be used to connect your
stereo to your aftermarket ampl f er(s).
The ReCurve EZQ s labeled w th Front, Rear and Subwoofer Output. You w ll need to run
RCA w res from your ReCurve EZQ to your new amp. Be sure to pay close attent on to the
RIGHT and LEFT outputs.
Watch th s v deo on select ng an amp for your Toyota:
www.youtube.com
Subwoofer Control Knob:
The ReCurve EZQ s equ pped w th a un que feature not often found n aftermarket
ampl f ers. Most 5 channel & subwoofer amps offer a bass boost knob. The problem w th
bass boost knob s they usually only boost the s gnal at around 45Hz. Th s leaves the rest of
the subwoofer frequency range LOWER than the 45Hz boosted frequency. The ReCurve EZQ
acts l ke a remote ga n and w ll lower and ra se the ent re subwoofer frequency range. Th s
Subwoofer
Control Knob
CA Outputs
Connect to your new amp(s)
CA Inputs
Not used

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w ll allow you to match your sub to your speakers. You have heard some songs w th way
more bass than the next song on your playl st. Th s allows you to qu ckly and eas ly adjust.
In our exper ence, most users f nd a “cru s ng” volume and then a “rock out” volume.
Cru s ng volume s usually where you are dr v ng and enjoy ng your mus c say at level 20.
However your JAM comes on and now you want to CRANK t! The subwoofer control knob
lets you qu ckly adjust to your EXACT level of bass. So be sure to place th s n an easy to
reach spot.
Subwoofer Input Control Sw tch:
Below the speaker nputs on the left hand s de of the ReCurve EZQ, you w ll see a sw tch
labeled: SUB INPUT, you w ll need to sw tch th s to F/R (sl de to r ght) nput for your
nstallat on. If you are NOT gett ng subwoofer output, fl p th s sw tch back and forth. If the
sw tch s not fully engaged you w ll get LOW or NO subwoofer output.
Sub Input switch
Slide this switch to F/ .

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How to adjust the EZQ:
So far you know what all the connect ons are for and how to get the ReCurve phys cally
connected to your stock stereo. But now you want to know how to make t work. Well the
great news s that 90% of the ReCurve EZQ setup has been completed.
There are 26 adjustable knobs on the ReCurve EZQ, AND at f rst glance t can be somewhat
nt m dat ng. But don’t stress, after a few m nutes of play ng w th the knobs you w ll be able
to adjust the mus c to your des red “taste”.
The f rst step n sett ng up the ReCurve EZQ s to set the OUTPUT voltage level that w ll be
del vered to your ampl f er. You w ll want to have a d g tal mult -meter for th s step. You
don’t’ need an expens ve un t. You can use a $30 un t from just about any electron cs store
or order one from amazon.com. We w ll have some on our webs te for about $25. If you
hunt around on amazon, can probably f nd them for as low as $15.
You w ll also need to download some test tones from our s te (ava lable here on th s page).
The test tones need to be burned to a CD and played on your stereo. You can v ew th s v deo
to see how to make t all work.
NOTE: WE prefer to use the CD to set up the voltage output. Phones and USB nterfaces
somet mes ntroduce var ables that we don’t’ want to deal w th dur ng th s phase.
We w ll be look ng to prov de around 4 – 6 volts of output to your ampl f er. The ReCurve
EZQ can prov de up to 12 volts of output. However, most amps are not setup to handle more
than 8 volts. There are some rare cases w th older amps where you m ght need add t onal
output so we bu lt that nto the ReCurve.
The rest of the steps can be seen here on th s v deo:

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www.youtube.com
After you have completed the recurve output, you w ll need to set the ga n on your amp.
We have another v deo here on how to set the ga n properly on your amp.
www.youtube.com
Adjust ng the EZQ EQ knobs:
Before you attempt to adjust the equalization knobs on the ReCurve EZQ, you should
wat h this video to understand the audio frequen y range.
www.youtube. om
Subwoofer Output Control Knobs:
31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100Hz
Front Output Control Knobs:
120Hz, 160Hz, 250Hz, 500Hz, 1kHz, 2kHz, 10kHz
Front Output Control Knobs:
120Hz, 160Hz, 250Hz, 500Hz, 1kHz, 2kHz, 10kHz

Online Audio Solutions, LLC – www.tacotunes.com
Th ngs to Remember:
Left refers to DRIVER s de of veh cle
R ght refers to PASSENGER s de of veh cle.
Try to avo d cutt ng the extra length on your ReCurve. It s not uncommon for folks new to
car aud o to make changes to the r system. Try to h de the extra w r ng somewhere to allow
for future changes. Keep n m nd we offer turn key systems to help you des gn your system
r ght the f rst t me.
Common Quest ons:
User Manual / Tech Support:
The user and nstallat on gu de(s) can be found onl ne at:
http://www.tacotunes.com/recurve
Warranty / Reg strat on:
http://www.tactounes.com/warranty
Reg strat on MUST be completed w th 30 days of purchase for the FREE extended warranty
coverage. NO EXCEPTIONS!!!!
THE RECRUVE EZQ IS WARRANTED FOR 90 DAYS FROM DATE OF PURCHASE.
An add t onal 12 month warranty (15 months total) s prov ded at NO COST to users that
reg ster the ReCurve EZQ w th n 30 days of purchase. ****** NO EXCEPTIONS*****
Extended warrant es are ava lable for purchase.
All eCurve EZQs are warranted for period of 90 days from the date of purchase against defects in materials and workmanship. The
warranty is for repair or replacement at the sole discretion of Online Audio Solutions LLC / authorized dealer. We may replace with a

Online Audio Solutions, LLC – www.tacotunes.com
new or reconditioned one of the same or similar design. Customer will be responsible for freight charges incurred to return the
product and will include a Cashier’s check or Money order in the amount of $20 for continental U.S or $35 for Hawaii, Alaska,
Canada and Puerto ico, payable to Online Audio Solutions, LLC to cover return shipping and handling. To obtain warranty service,
the warranty registration MUST have been completed within 30 days of purchase
Before shipping the unit back to Online Audio Solutions, LLC. You must obtain an MA# ( eturn Merchandize Authorization)
Please submit an MA request online at www.tacotunes.com/rma.
This warranty does not cover any unit subjected to abuse, neglect, incorrect wiring, water damage, repair or modifications Any
damages resulting from legal action for breach or express or implied warranties shall be limited to the cost of the original purchase
price of the unit. As a condition of this warranty, it is agreed that the remedy provided by this document is the sole remedy under
this warranty. All liability for coincidental damages is excluded. The purchaser agrees to retain the original proof of purchase for
establishing the effective date of this warranty. Should Online Audio Solutions or authorized dealer replace your product under
warranty, this replacement shall be considered a transaction under the original warranty and does not extend the original warranty
period. This warranty is non-transferable.
ReCurve EZQ
Last update: 7/22/2014