Toa SR-F1A, SR-L1A, AC-F1, AC-L1 Specifications

TOA PROFESSIONAL SOUND SYSTEM

ELECTRONICALLY CONTROLLED SPEAKER SYSTEM

SR-F1A
SR-L1A

Speaker System
Sub Woofer System

AC-F1/AC-L1

DESCRIPTION

The TOA SR Loudspeakers are compact integrated
speaker systems made for quality sound reproduction and
easy transportation.
with AC-F1/AC-L1 Electronic control units, and work
together to cover the low/high and super-low frequency

range. The AC-F1 and AC-L1 provide a frequency divider,
equalization, correction for component time offset, phase
correction, an active clipping limiter, and a crossover select
switch for SR-F1A ceiling mounting.

The SR-F1A uses the high-power HFD-651 driver and an

LE Series constant directivity horn. Its trapezoidal cabinet
allows arrays to simulate a coherent wavefront single point
source, and its angle of 15° on both sides reduces mutual
high-frequency interference in tightly clustered designs.
The SR-L1A has computer-tuned bass-reflex ports, and two
38cm (15”) woofers with a 72mm (2.8”) diameter voice coil.
Two metal suspension points are on both the top and
bottom, and the rugged APITON plywood enclosure is
finished with shock-resistant FRP (fiber-reinforced plastic).
Neutrik NL4MPR quick connectors are used for both the
SR speakers,

Both SR-F1A and SR-L1A are used

Electronic Control Units

AC-F1

SR-L1A

FEATURES

SR-F1A Speaker System

1. Full-range speaker with control by AC-F1 Electronic
Control Unit.

2. High power capacity of 120W continuous pink noise for
low frequency and 80W for high frequency.

3. 30cm (12”) woofer with 20cm (7.9”) magnet.

4. HFD-651 high power compression driver with LE Series
constant directivity (CD) horn (60° horizontal by 40°
vertical dispersion).

5. Aeroquip aircraft-type hanging fixture attachment

points provided on enclosure top and bottom.

6. Enclosure side angle is 15° on both sides to prevents
mutual horn high-frequency interference.

7. Neutrik NL4MPR input connector.

8. APITON plywood enclosure with rugged FRP coating.

9. Removable punched metal front grille.

SR-L1A Sub Woofer System

1. Sub-woofer with control by AC-L1 Electronic Control

Unit.

2. High power capacity of 300W continuous pink noise.

3. Ultra-linear, high power 38cm (15”) woofers.

4. Bass-reflex enclosure computer-tuned to optimal

conditions.

5. Neutrik NL4MPR input connector.

6. APITON plywood enclosure with rugged FRP coating.

7. Removable punched metal front grille.

AC-L1

SPECIFICATIONS SPECIFICATIONS

Model No.
Enclosure
Speaker

Low Frequency
High Frequency

Nominal impedance

Sensitivity

Frequency Response
Crossover Frequency
Power Handling Capacity

Low Frequency

High Frequency

Input Connector
Enclosure Material
Weight
Dimensions

Finish

SR-F1A

Bass Reflex Type

One 30cm (12”) dia. cone speaker
CD horn (60° horizontal by 40° vertical) plus

compression driver

Low frequency: 8 ohms,
High frequency: 16 ohms

Low frequency: 98dB (1W/1m),
High frequency: 110dB (1W/1m)

70-20kHz, with AC-F1’s use
1kHz with AC-F1’s use

Continuous pink noise: 120W RMS (Band-limited
Continuous program: 360W

Continuous pink noise: 8OW RMS (Band-limited
Continuous program: 240W

Neutrik NL 4MPR
APITON plywood
38kg (83.8lbs.)
390(W) x 619(H) x 362(D)mm

[15.4(W) x 24.4(H) x14.3(D) inches]
Enclosure: FRP coating in gray,

Front grille: Black-painted

50Hz-1kHz),

1kHz-20kHz),

Model No.
Enclosure
Speaker
Nominal Impedance
Sensitivity
Frequency Response
Crossover Frequency
Power Handling Capacity

lnput Connector
Enclosure Material
Weight
Dimensions

Finish

SR-L1A

Bass Reflex Type
Two 38cm (15”) dia. cone speakers
8 ohms x 2
96dB (1W/1m)
35Hz-1kHz
125kHz with AC-L1's use
Continuous pink noise: 300W RMS (Band-limited

Continuous program: 900W
Neutrik NL 4MPR
APITON plywood
81 kg (178.6lbs.)
829(W) x 629(H) x 602(D)mm

[32.6(W) x 24.8(H) x 23.7(D) inches]
Enclosure: FRP coating in gray,

Front grille: Black-painted

40Hz-1kHz),

DIMENSIONAL DIAGRAM

SR-F1A

SR-L1A

CONNECTION DIAGRAMS

1. Single system(SR-F1A)

2. Combination system (SR-F1A and SR-L1A)

Note:

Refer to "Electronic control unit’s operating instructions” on
control unit

Sale to use power amplifier 300W (8 ohms) or more output
Do not connect two speakers or more in parallel, or BTL connection of power amplifier

and the level setting of power amplifier

the mode settting of the

BLOCK DIAGRAM

electronic

INPUT CONNECTOR

Input connector is the Neutrik NL4MPR.

Each contact number is connected as per the following table:

Contact number

*Woofer direction viewed from the front.

Applicable cable connector is NL4FC.

CHARACTERISTIC DIAGRAMS (1/3 Octave Pink Noise)

Frequency Response

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SR-F1A (with AC-F1 electronic control unit’s use)

Frequency Response

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SR-L1A (with AC-L1 electronic control unit’s use)

General Frequency Response

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SR-L1A + AC-L1, SR-F1A + AC-F1, AC-L1: Crossover OUT

(1W/1m, at 300Hz)

(1W/1m, at 100Hz of crossover IN)

(1W/1m at 300Hz of the SR-F1A)

Polar Response

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SR-F1A

(1W/4m: 1/3 Octave Pink Noise)

Beamwidth vs. Frequency

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SR-F1A

Directivity Factor vs. Frequency

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SR-F1A

Architect’s and Engineer’s Specifications

The two way high/low speaker system shall be a TOA SR-F1A, and the
sub-woofer system shall be a TOA SR-L1A, or approved equivalents. The
system shall be vented bass-reflex enclosures intended for portable system
applications, made of APITON plywood with FRP (fiber reinforced plastic)
finish and a punched metal front grille. Input connections shall be via a
Neutrik NL4MPR connector.
The SR-F1A shall combine a low-frequency 30cm (12”) diameter/98dB
sensitivity cone speaker and a compression-driver equipped high­frequency CD horn with 60° horizontal by 40° vertical dispersion and 110dB
sensitivity. Its power handling capacity shall be 120W RMS continuous pink
noise, band-limited to 50Hz-1kHz (low frequency), and 80W RMS
continuous pink noise, band-limited to 1 kHz-20kHz (high frequency).
The speaker shall weigh 38kg (83.8lbs.) and have dimensions of 390(W) x
619(H) x 362(D)mm [15.4” x 24.4” x 14.3"].
The sub-woofer system SR-L1A system shall have two 38cm (15”) diameter
cone speakers and 96dB sensitivity. Frequency response shall be 35Hz-

1kHz. Its power handling capacity shall be 300W RMS continuous pink
noise, band-limited to 40Hz-1kHz. The speaker system shall weigh 81 kg
(176.8lbs.), and have dimensions of 829(W) x 629(H) x 602(D)mm [32.6” x

24.8” x 23.7”].
The electronic control unit for the SR-F1A and SR-L1A shall be the AC-F1
and AC-L1 respectively. When the AC-F1 is used, the frequency response
of the SR-F1A shall be 70Hz-20kHz, with a crossover frequency of 1kHz.
The AC-L1 shall provide the 125Hz crossover frequency for the SR-L1A.
Both electronic control units shall provide a crossover network with horn
equalization, component time offset correction, phase correction, an active
clipping limiter, and a crossover switch used when the SR-F1A is ceiling­mounted.

AC-F1/AC-L1 Electronic Control Units

FEATURES

1. Individual limiters that prevent speaker damage due to
overdriving or power amplifier clipping.

2. Dynamic equalization reduces the gain of the most ear­sensitive frequencies (3kHz-4kHz) when the sound
pressure level is extremely high, for a smoother dynamic
sound.

3. Time offset correction.

4. Crossover network at 1kHz.

5. Phase correction throughout crossover region.

AC-F1

6. Horn equalizer compensates for constant directivity
horn characteristics.

7. Crossover curve selection switch for speaker ceiling
suspension (AC-L1).

8. For exclusive use with SR-F1A (AC-F1) and SR-L1A
(AC-L1)

9. Each unit occupies one standard EIA 19” rack space.

10. Electronically-balanced input and output employing
XLR connectors. (No. 3: HOT)

AG-L1

DIMENSIONAL DIAGRAMS

Model No.
Input

Input Impedance
Rated input Level
Max. Input Level
Sense Input
Sense Input Impedance
output

Output Impedance
Rated Output Level
Max. Output Level
Crossover Frequency
Distortion
Hum & Noise
indicators

Front Panel Operation
Power Requirement
Power Consumption

Weight

AC-F1

Electronically balanced

(Cannon XLR-3-31 or equivalent)

20k ohms (Balanced), 10k ohms (Unbalanced) 20k ohms (Balanced), 10k ohms (Unbalanced)

+ 4dB* (Pin No.3: HOT, No.2: COLD and No.1: GND)

+ 26dB*
Electronically balanced (4P screw
10k ohms
Electronically balanced

(Cannon XLR-3-32 or equivalent)

600 ohms (Balanced)

+ 4dB*

+ 26dB* (Balanced), + 20dB* (Unbalanced)
1kHz
Less than 0.05% (+ 4dB* 1 kHz)
Less than - 90dB* (20Hz ~ 20kHz)

-Power green LED

-Sense input. green LED

(LOW SENSE, HIGH SENSE)

-Limit: red LED (LOW LIMIT, HIGH LIMIT)

-Dynamic Equalizer green LED (D.EQ)
Input Level control, Power switch

AC Mains, 50Hz/60Hz
12W 120V version. 16W 220V--240V version

3.7kg (8.16lbs.)

terminal)

DIMENSIONAL DIAGRAMS

SPECIFICATIONSSPECIFICATIONS

Model No.
Input

Input Impedance
Rated Input Level
Max. Input Level
Sense Input
Sense Input Impedance
output

Output Impedance
Rated Output Level
Max. Output Level
Crossover Frequency
Distortion
Hum & Noise
Indicators

Front Panel Operation
Rear Panel Operation

Power Requirement
Power Consumption

Weight

AC-L1

Electronically balanced

(Cannon XLR-3-31 or equivalent)

+ 4dB* (Pin No.3: HOT No.2: COLD and No.1: GND)

+ 26dB*
Electronically balanced (2P screw terminal)
10k ohms
Electronically balanced

(Cannon XLR-3-32 or equivalent)

600 ohms (Balanced)

+ 4dB*
+ 26dB* (Balanced), + 20dB* (Unbalanced)

125Hz
Less than 0.05% (+ 4dB* 1kHz)
Less than - 90dB* (20Hz ~ 2OkHz)

-Power. green LED

-Sense input: green LED (LOW SENSE)

-Limit: red LED (LOW LIMIT)
Low level control, Power switch

Crossover select switch

AC Mains. 50Hz/60Hz

10W 120V version, 12W 220V-240V version

3.7kg (8.16lbs.)

*OdB=0.775Vrms

TOA Corporation

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Specifications are subject to change without notice

Printed in Japan (209) 833-64-521-8A