Model Z250C4-SLCompetition Four Channel

Amplifier

A.R.P.A. OF AMERICA CORP.MADE IN MODESTO, CA U.S.A.

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Table of Contents

The SymbiLink Z250C4-SL 3

Z250C4-SL Key Features 4

Front Panel Layout - Input Section 5

Front Panel Layout - Output Section 6

Specifications 7

Power Per Channel vs. Distortion,Four Channels Driven 7

Installation 8

The Z250C4-SL Also Works With TheSymbiLink Line Driver 9

The Z250C4-SL Supplies Power To SignalProcessors, Such As The SP7-SL 10

Why Use The Balanced SymbiLink System? 11

SymbiLink Cable And Connector Pinout 12

Technical Assistance 13

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The SymbiLink Z250C4-SL

Thank you for purchasing the Z250C4-SL.

The Z250C4-SL is a four channel amplifier that is conservatively rated at30 watts x 4 into four ohms, 60 watts x 4 into two ohms and 100 watts x4 into one ohm loads.

The Z250C4-SL features SymbiLink balanced inputs. Theseprofessional style connections eliminate induced distortion and noise forthe ultimate in sonic purity. The SymbiLink system also allows forsimple connections to other SymbiLink components, greatly simplifyingthe installation process.

The power supply in the Z250C4-SL is a new design that dramaticallyincreases the available power and efficiency. New Gate Drive Boostcircuitry greatly improves the MOSFET switching performance andallows cooler operation. Low distortion, very high stereo separation andsmooth, fast transient response are all characteristics of this amplifier.

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Z250C4-SL Key Features

• Balanced SymbiLinkTechnology

• Quality ZAPCO construction

• Dual pro audio balanceddifferential inputs

• Computer-linearized bias forclass A performance

• Low radiated noise for cleanAM/FM reception

• Separate LED’s for Power andProtection

• Low global feedback • Low T.I.M., high slew rate• Surface mount technology • Can drive highly reactive loads• Symmetrical, discrete power

amplifier circuitry• High current PC board with

massive power & groundplanes

• Gate Drive Boost maximizespower supply efficiency andimproves overall performance

• Short circuit, high temperature,reverse voltage, DC offset andover-voltage protection

• Load stability to one ohm • Sixteen 25-ampere bipolaramplifier output transistors

• Eight 50-ampere MOSFETswitching devices

• Three year warranty(dealer installed)

• Precision 1% resistors usedthroughout

• Designed and manufactured inthe USA

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Front Panel Layout

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SpecificationsPower per Channel - 4 channel mode T.H.D. +N 30 watts x 4 @ 4Ω <.02% 60 watts x 4 @ 2Ω <.04% 100 watts x 4 @ 1Ω <.3%Power - Dual bridged mono 120 watts x 2 @ 4Ω <.04% 200 watts x 2 @2Ω <.3%Frequency Response 20Hz - 20kHz +0, - .35dBS/N Ratio @ 1kHz > 100dBTransient Distortion <.016%Slew Rate > 40v/µSSeparation @ 1kHz, Front or Rear > 70dBDamping Factor @ 1kHz > 490 @ 4Ω, 230 @ 2ΩInput Sensitivity 500mv - 5 voltsMax. Current Requirements 37 amperes @ 260 wattsIdle Current 1.65 amperesDimensions 7.5” x 14” x 2.5”

Power per channel vs. Distortion, fourchannels driven

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Installation

Careful thought and planning is essential when installing any piece ofequipment in your vehicle. To ensure proper operation and maximumperformance of your amplifier, ZAPCO recommends that theinstallation is performed by a ZAPCO authorized dealer. If this serviceis unavailable to you, or you wish to do your own installation, thefollowing guidelines must be followed:

MOUNTING

Always select a dry location in the trunk or passenger compartment only.This unit must be securely fastened to a solid surface.

Consideration must be given to air flow for proper heat dissipation.

POWER

A #10 gauge or larger wire should be used for power and groundconnections. A fuse must be installed on the power wire within 18inches of the battery for safety reasons. The size of this fuse will varydepending on the system configuration. The ground wire should beconnected directly to the chassis of the vehicle. This ground pointshould be clean and sanded to bare metal.

Never use seat or seatbelt bolts for grounding!

If you have any questions regarding proper use or installation of thiscomponent, please consult your local authorized ZAPCO dealer. Thesafety of your equipment and your vehicle could depend on properinstallation. If you do not have a local dealer, please contact the factorydirectly at (209) 577-4268 between 8am and 5pm Pacific time and wewill be glad to assist you.

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The Z250C4-SL also works with theSymbiLink Line Driver

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The Z250C4-SL supplies power tosignal processors such as the

SP7-SL

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Why use the Balanced SymbiLinkSystem?

RCA style unbalanced cables have the following disadvantages:

1) Magnetic & electrostatic pickup.Noise and audio distortion can be induced into the cablebecause the cable shield is also the audio (-) connection.

2) Unbalanced cables are typically driven into very highimpedance’s, causing transient ringing. (See the drawing,“Transient Distortions” below)

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SymbiLink Cable and ConnectorPinout

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Technical Assistance

Should you experience a problem with your Z250C4-SL, please contactthe dealer that sold you this product. If your dealer is unable to solveyour problem, you may contact the factory service department directly.

Phone: (209) 577-4268 mon-fri 8am-5pm pacific time

Fax: (209) 577-8548

If you need to return this product for repair, please include your name,return shipping address, daytime phone number, and a detaileddescription of your problem. A photocopy of your original purchasereceipt is necessary to determine warranty status and should also beincluded.

Send all repairs to:

A.R.P.A. of America Corp. Attn.: Service Department413 S. Riverside Drive, Suite DModesto, CA 95354

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A.R.P.A. of America Corp.413 S. Riverside Drive, Suite D

Modesto, CA 95354(209) 577-4268

Fax (209) 577-8548

Z250C4-SLRev. C11/95