Acoustat Model 1 Owners Manual 3o5s3t

MODEL,ONE ODEL THREE MODEL ONE + ONE MODEL T W M K 121 & M K 141 VERSIONS

A USTAT Electrostatic r Systems OWNER’S MANUAL AND ASSEMBLY INSTRUCTIONS

TABLE OF CONTENTS

Specifications ........................................................................

1

Limited Warranty Statement ............................................................

1

Introduction ..........................................................................

2

Registration Cards ..........................................................

......... 2 Packaging ........................................................................... 2 Fusing ............................................................................... 2

.............................................................. Sub-woofer Connections and Aacemenf ............................................ Assembly Instructions

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3 4

4 -5

Recommended Set-up and speakerPlacement

............................................................... Placement Within the Room ....................................................... Angling ....................................................................... Acoustical Properties of the Walls .................................................. Phasing ......................................................................... Electric ................................................................ Cleaning ............................................................................. Removal of Interface for all Models .................................................... High Frequency Balance .............................................................. Schematic . MK-421 ................................................................. Parts List - MK-124 ................................................................... Schematic - MK-141 ................................................................ Parts List - MK-141 .................................................................. Distance from Wall

5

5 5 - 6 6

6 6

7 7

7 8 9 10 41

SPECIFICATIONS

MODEL ON€- FrequencyResoonse: 30-18kHz +/-3dB;Sound Pressure Level: 108 dBmeasured@ 15' in a 14’ x 18' room. (music Peaks); Minimum Power Requirements: 75 Watts/Channel; NominalImpedance: 4 ohms; PowerConsumption: 5 Watts (120V,50/60Hz); Dimensions:72" x 11"x 31/2";Bass Model Dimensions: 181/2"x 18 1/2" 4 8x1/2";Weight: 65 Lbs. (Speaker and Interface). 37 Lbs (Bass Module)

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18' in a 14' x MODEL 1+ 1 Frequency Response:35-20kHz+/-3dB;SoundPressureLevel: 108db @ 2 2 room. (Music Peaks); Minimum Power Requirements: 100 Watts/Channel; Nominal Impedance: 4 Ohms; Power Consumption:5 watts (120V, 50/60Hz); Dimensions: Model 4 x x 3%”;Weight: 72 (Speaker and Interface)

Sound Pressure 40 db@ in a 14 MODELTHREE - FrequencyResponse: x 22 room. (Music Peaks); Minimum Power Requirements: 70 Nominal Dimensions: 2 8x Impedance:4 Ohms; PowerConsumption:5 Watts ( Weight 98 MODEL2 2 - FrequencyResponse: Sound Pressure db 22‘ in a x 26‘ room. (Music Peaks); Minimurn Power Requirements: Nominal Impedance: 4 Ohms; Power Consumption: 5 Watts Hz); Dimensions: 9 4 x 20” x 95

Acoustat specified and in service,

defective The

parts, subject to

must

or damaged

abuse, negligence,

at

maintenance are

by

covered by

OR PRODUCT.

or

conditions

INTRODUCTION Congratulations on your purchase of ACOUSTAT ELECTROSTATIC LOUDSPEAKER SYSTEM. Please review the entire owner's before uou begin to assemble your new speakers to assure you of reachingthe speaker's full potential.When assembled, placed in the room, and used with fhe proper electronics, the electrostatic loudspeakers you with years of listening enjoyment.

REGISTRATION CARDS complete and return enclosed purchase registration card within ten days of purchasedyournewspeakem. This card does not allow you of updafes and other product news that would be interest to owners.Any additional you provide aid incontinuingto bring music lovers everywhere the finest audio components today.

PACKAGING SAVE ALL PACKAGING Your pieces d equipment, and must be property

electrostatic whenever the original packaging materials may be obtained from at a

are finely is necessary. ONLY charge.

FUSES fuses In the audio signal path. This is replacing can be used or the may become invalid.

All ACOUSTAT loudspeakers utilize locatedon the rear dthe only those of and

base of each

LOW-FREQUENCY TRANSFORMER TAP (FULL RANGE MODELS ONLY) Beforeassembly, locate low tag) and that setting is correct for

MI M3

This setfing

tap terminal (identified by a model as p e r below:

R e d Wire to Red Lug Red to Orange Lug Red to Yellow Lug

determines bass in bass response that is weaker

2

for the different speaker models. than normal.

3

ASSEMBLY INSTRUCTIONS ALL MODELS PLEASE READ COMPLETELY BEFORE YOU

ASSEMBLY.

For assembly you will require a targe Phillips type screwdriver, and the small attached to the interface cord. Removebases,speaker sand interface from their packingcartons. To the

of the s for assembly.

2. Using the small hex wrench provided, the disassemble the side plates from the main assembly. Set the screws and wrench aside they required later. the side plates on the base as 3. Set a speaker base on the floor. nameplate side up. two slot head screws p e r plate. Leave shown (1 securing them GENTLY on the floor, the wiring harness facing up. DO NOT DROP! 4. Lay speaker The frapped air under fhe can rupture fhe speaker diaphragm. Have a helper raise the lower end , or it on the box. 5. the completedbaseassembly shown aligning the side plates to the in the speaker back .Tighten all screws securely. 5. Standing the compfetedspeaker up vertically. positionthe interface assembly the harnessemergingfromthe the speakerasshown(3). Locate speaker .Separatethe three wire bundles into the with the plugonthe hook on end; and the WHITE gmup,with end: the BLUE group With the blue on the end. 7. Referringto diagram insert pin plug (RED group) into the RED socket on circuit Aff ach BLUE hook to the on the rightside the board of the interface the spacer below the thumbscrew, and the word 'BLUE'. the blue dot washerandtighten thumbscrewseveral Repeaf this procedure for the hook on fhe side ofthe circuit board. assemble the inferface side plates, GENTLY feedingthe wiring back the hole in the speaker . on the side flanges on the OUTSIDE side as shown (4) & (5). the plates. keeping head screws info fhe hofes in the sides inferface.and ttghfen four the hex wrench provided (5). 9. Position fhe assembled speaker systems the room, two or three from the backwallandat least 'SPEAKER section of the the cord info an wall speaker terminals to making sure that proper phasing outlet. positive(RED) terminal on speakeris connectedto (RED) terminal on and for (BLACK)).

1411 B INTERFACE SYSTEM GENTLY layfhe woofer moduleon its side, exposing the woofer cone and left and right terminal on the the terminals labeled 'woofer' on connections (6). Connect the woofer the back of the speaker inferface. Repeat this procedure for the right Be sure proper phasing (see section on phasing in the placement section of the manual.) 4

FAX 704 331 0402 LEE NICHOLS ARCH

When complete, there be a and a right cable to the single bass module. Return bass module its operating (woofer cone facing down). While is generally advisable to place the bass module a central location speakers,some roomarrangementsmay not permitthis. Our listeningtests revealedbalanced bass performance when the module was placed the shaded area in “PLACEMENT DIAGRAM”. proximity to walls corners result in uneven response, with these yielding increased bass at the expense of placements NOTE the break-in few days of time

electrostatic portion produce sonic improvement and an increase in efficiency.

RECOMMENDED SET-UP AND SPEAKER PLACEMENT DISTANCE FROM WALL Leave at least three feef from fromf hecenterofthe to the speaker. a walls.

to the rear wall. To determine this distance, measure betakenon at two from the side of the speakers to the side

PLACEMENT THE ROOM By placing speakers far apart against a tong you wilt obtain the largest “listening they an equilateral triangle window” without loss of center All. Race the speakers so apex. (Refer to Figure IA). with the listening posifionat

LOW

RESPONSE

the speakers against the short of the room, with the rear of the speakers the possiblebasswill be obtained. may be impossibleto projectinginto twofeet suggested distance fromthe stde of the speaker tot hewall ina narrow room. retain In this case, it is to use the space to separate the and Iocafe to the side (Refer to Figure ANGLING Angle the speakerswith the s directedtoward the listeningposition. There are two general “apex” is slightly in of the listener. (See Position A). This arrangement the widest you to moveyour listeningpositionwith minimum change; listeningwindow. OR Angle the speakers so that the “apex” is slightly behind listener. (See Position This

5

arrangement reduces the "Listening window," but provides a more focused sound. requires angling, therefore. speakers are angled outward slightlyto achievethis "apex" position. NOTE Neither position is in cases other. Personaf taste and room placement which is the best for you. Experiment! ACOUSTICAL PROPERTIES OF THE WALLS A end-dead end sef-up in the listening room can sometimes improve the sonic of a speaker This can be accomplished by using materials speakers such as fiberglass s, carpet. etc. the walls can more preciseimagingand superior focus from your speakers. a listeningtest beforeyou fhe walls using a heavy blanket suspended while you listen.

THE SOLID LINES ARE SHOWN TO ANGLING ONLV WHEN THE S ARE PERPENDICULAR TO THE THAT APEX DASHED LINES REPRESENT SONIC RADIATION OF THE SPEAKERS

I

SPEAKERS SHOWN ARE DRAWN WITH THE FRONT PLANE OF ME PERPENDICULAR TO THE LISTENER IN A ROOM THIS WOULD MELD THE IN THE B TO ACHIEVE THE APEX IN A THE SPEAKERS WOULD HAVE TO BE ANGLED IN SLIGHTLY

I I

I

speakers are designedto preservethe correct absolute phasethroughouf the system, the coupling the signal to the air. The ensures that both vocalists and sound as natural as possible. Phasingdepends on connecflonsh-om (+) black(--) to black.

ELECTRIC Electrostatic speakers produce a strong electric Reldwhich can the operation of any in well above the audio low level electronic circuitry close proximity. This can hasthe of power dissipationand decreased headroomin system. For this reason, the leads and the phono inputs of the preamplifier should be that no can occur. kept at Least six to eight feef from the nearest WARNING! DO NOT apply audio to the intelface the Power removed, hence no bias! Connection to switched is not recommended. DO NOT exceed fuse ratings or by receptacle. Either the above in damage low frequency if the interface is requiring and covered by the

6

CLEANING Speakerclothmay be cteonedwith anycommercial Use cleaner such as K2R for

be used with polyester knit

oranycleanerdesignedfo concenffatedspots.

interface be removed from the speaker, the following procedure is necessary to discharge the s: UNPLUG amplifier.

interface from the

2. Remove the four

outlet and

head screws

the speaker leads from the

secure the main interface assembly, using the

provided.

3.

the interface unit from

side

brackets

4.

the interface unit on the Boor directly behindthe speaker, being careful not to unpfug the three wire groups or strain the wiring harness.

5.

Removethe center RED pin plug. Holdthe wire an inch behindthe pin and NOT GRAB PLUG! Touch to either the BLUE or WHITE

6. Loosen the

pull. DO on the circuit

thumbscrews and remove the hooks.

are present in the charged . WARNING: High static shack. procedures will result in an annoying but

-frequency FREQUENCY BALANCE CONTROL balance is at the foroptimum

to fallow these

a room acoustics. This level can be adjusted for situations in fhe following manner. Follow the for “REMOVAL OF INTERFACE at fhe end of manual. Referring to diagram locate the highfrequencybatance resistor in the interfaceassembty. Loosenthe or right, according to the diagram for increase or decrease. After center tap and adjustment, tap NOTE optimum performanceandstereo imaging be SURE that are IDENTICALLY. checked with an ohmmeter.

\

N

W W

N

m m

List

- MK-121 Polystyrene Polypropylene Non-polar 6 Polypropylene 6KV

c2 c3 c4,

220 3300

R2. R3 R4

6 ohm 50 ohm ohm 500 M ohm

slider

w

20 w 2W

High

‘TI T2

Acousfaf

diode

Transformer Hi Frequency 21 Lo Frequency Transformer

5 Amp F2, F3

Amp

9

FAX 704 331 0402 LEE NICHOLS ARCH

Component Values List

-

c2

40 220

c3

C5, C6

220 C9, CI 0,

R5

UF

3300

6 ohm K ohm ohm 500 M 5 ohm

50 w slider

2561

High

45

3w 2w 20 w

ohm

Air core indicator

Bias Transformer

F2, F3

diode

6 Ceramic disc Non-polar 3 Ceramic disc

Terrace Fort

phone:

33315