AT100-RM - Uncategorized Atlas Sound - Free user manual and instructions

Product Type	Rack-Mount Amplifier
Model	AT100-RM
Brand	Atlas Sound
Power Output	100 Watts RMS
Number of Channels	1 (Mono)
Input Connectors	1/4" TRS, XLR (Combo)
Output Connectors	Speakon, Binding Posts
Frequency Response	20 Hz - 20 kHz ±0.5 dB
Total Harmonic Distortion	< 0.05%
Signal-to-Noise Ratio	> 90 dB
Input Sensitivity	0.775V
Dimensions (W x H x D)	19" x 1.75" x 10" (483 x 44 x 254 mm)
Weight	8.5 lb (3.9 kg)
Cooling	Variable speed fan
Power Requirements	120 V AC, 60 Hz, 2A
Protection Features	Short circuit, thermal, DC offset
Controls	Volume, High/Low EQ, Power switch
Front Panel Indicators	Power, Signal, Clip, Protect
Mounting	19" rack mount, 1U
Accessories Included	Rack ears, power cord, user manual

Frequently Asked Questions - AT100-RM Atlas Sound

What is the power output of the Atlas Sound AT100-RM?

The AT100-RM delivers 100 watts RMS into a 4-ohm load, suitable for commercial audio installations.

What type of inputs does the AT100-RM have?

It features combo XLR/1/4-inch inputs for balanced or unbalanced signals.

Can the AT100-RM be bridged?

No, this is a single-channel (mono) amplifier and cannot be bridged.

What is the rack size of the AT100-RM?

It occupies 1U (1.75 inches) of vertical rack space in a standard 19-inch rack.

Does the AT100-RM include a power cord?

Yes, a standard IEC power cord is included.

What protection features does the AT100-RM have?

It includes short circuit, thermal overload, and DC offset protection to prevent damage.

How do I connect speakers to the AT100-RM?

Use the Speakon or binding post outputs. Ensure speakers have a minimum impedance of 4 ohms.

What is the frequency response of the AT100-RM?

The frequency response is 20 Hz to 20 kHz ±0.5 dB, providing full-range audio.

Is the AT100-RM fan-cooled?

Yes, it has a variable speed fan that adjusts based on temperature for quiet operation.

Where can I find the user manual for the AT100-RM?

The manual is available for free download on notice-facile.com in PDF format.

USER MANUAL AT100-RM Atlas Sound

Attenuator Installations

Wiring

Each terminal will hold up to 2-16AWG stranded wire. For larger wires or home run situations, a small length of wire and a wire nut are recommended. Attach wire according to label on terminal block as shown to the right (Non-PA Models will not have the "VDC+" and "VDC-" terminals).

*Install the unit with the terminal block on top. This will ensure that the OFF position is in the bottom.

(-PA) PRIORITY ATTENUATORS

Schematics for Priority Attenuators Power Switching Req. for -PA Attenuators

graph TD
    A["TO AMP OUTPUT"] --> B["RED"]
    C["TO RELAY POWER"] --> D["ATTENUATOR"]
    E["WHITE"] --> D
    F["BLUE"] --> D
    G["GREEN"] --> H["Speaker"]
    style A fill:#f9f,stroke:#333
    style C fill:#f9f,stroke:#333
    style E fill:#f9f,stroke:#333
    style F fill:#f9f,stroke:#333
    style G fill:#ccf,stroke:#333
    style H fill:#ccf,stroke:#333

WIRING REQUIREMENTS: (1) PAIR FOR AUDIO, (1) PAIR FOR RELAY

Contacts: SPDT-2Amp Rating Relay has a protective cover.

(-RM) Rack Mount

Drill holes in panel using the template to the right. Peel off adhesive backing on escutcheon overlay. Align hole openings with holes in panel and affix to surface. Remove knob and nut from attenuator. Insert bushing through large hole in panel making sure that the small indentation on the bracket lines up with the small hole in the panel. Fasten attenuator to panel with the nut. Fit attenuator knob on shaft. Tighten screw on knob to secure.

Technical line drawing of a mechanical assembly with a bracket and a small component (no text or symbols)

Dimensional Specifications

-RM Models supplied without a faceplate. All other models supplied with a single faceplate. Double gang stainless steel faceplate can be ordered separately.

MODEL	A	B	C
AT10	2	18" (54mm)	2	34" (70mm)	1
AT35	2	18" (54mm)	2	34" (70mm)	1
AT100	2	12" (64mm)		234" (70mm)	1

Commercial Attenuators

AT Series, E408 Series

Close-up of a triangular electronic component with a label and AT35 branding (no readable text beyond branding)

AT10 / AT35 / AT100 Series

Close-up of a black rotary dial with numbered terminals (1–10) and a pointer, mounted on a white surface with two small holes (no visible text or symbols)

White electrical outlet switch with a circular button and screw hole (no text or symbols)

AT10 / AT35 / AT100 Series Face Plate Options Attenuators are available in Classic Stainless or Decora(Decora available in Ivory or White)

Electrical switch panel with numbered dial and terminal bracket (no visible text or symbols)

E408-100

RM Series

Features

• Models Feature a Range of Attenuation Steps (1.5dB or 3dB Steps) as Well as Continuous to Meet Application and Budget Requirements
• Wall Plates are Stainless Steel with Stamped and Filled or Screen Printed Dial Scale, and a Skirted Black Knob (White and Ivory Plastic Plates with Matching Skirted Knobs Also Available in Decora Style-D Series Only)
• Popular Rack Mount Attenuator Versions are Available on the AT and E408 Series for Mounting on to Blank Panels in Equipment Cabinets
• All AT Models Mount into Most 1-Gang E.O. Boxes. (2 ^3/4 " Deep)
  • AT and E408 Series are UL Listed

General Description

AT Series Industry Standard Auto Transformer. NHigh-quality auto transformer series provides the advantages of excellent frequency response, low insertion loss and reliable performance for volume control application in 25V/70.7V systems. Attenuation is accomplished in ten make before break steps plus positive Off position. (No stop between maximum and Off position to prevent switch damage). Contacts are silver plated for noise-free operation. Features a removable terminal block. Includes stainless steel plate, with stamped and filled or screen printed dial scale and a skirted black knob. (White and ivory plastic plates with matching skirted knobs also available in Decora style-see AT model description chart).

E408 Auto Transformer with Precision Level Control. NSpecially designed for attenuation in masking and sound reinforcement systems where fine tuning of level control is required. Employs a ten-position, non-shorting rotary switch without stop. Attenuation rate is 1.5dB per step. (All other specifications are the same as the AT Series including the UL listing).

PA Series Priority Paging Option. NPriority paging feature by-passes the effect of the attenuator to provide program level selection of individual emergency and paging signals at the amplifier. Option is available on all AT attenuators. The SPDT relay is operated with 24VDC at 10mA. Includes protective relay cover to ensure lasting trouble-free performance. Terminations to the relay and attenuator are made via a removable terminal block. (All other specifications except for dimensions are the same as selected AT models).

RM Series Rack Mount Option. NFor attenuation convenience of rack-mounted equipment in cabinets and consoles, the AT, E408 Series attenuators are available without mounting plate for rack panel installation. Attractive matte black polycarbonate dial scale overlay with adhesive backing replaces the mounting plate. Includes skirted black knob. Overlay size is 29 square (51mm). (To order, simply add RM after the selected attenuator model number. Example: AT10-RM or AT10-PARM.) (Dial scale overlays to retrofit existing installations are available, see Model HX23.)

Replacement Knobs

Close-up of a black mechanical knob or dial with a pointed tip and central knob (no text or symbols visible)

HX21-B

Close-up of a white, circular object with a small dark mark on its surface (no text or symbols visible)

HX22-W

Specifications

AT10-(PA)

Power Rating * N N10 Watts

UL Listing

Attenuation Per Step N N3dB

Total Attenuation N N N33dB**

Insertion Loss N N N.4dB

Plate Size N N N1 gang

Resistance N N NNone

AT35-(PA)

Power Rating * N N35 Watts

UL Listing

Attenuation Per Step N N3dB

Total Attenuation N N N27dB

Insertion Loss N N N.6dB

Plate Size N N N1 gang

Resistance N N NNone

AT100-(PA)

Power Rating * N N100 Watts

UL Listing

Attenuation Per Step N N3dB

Total Attenuation N N N27dB

Insertion Loss N N N.6dB

Plate Size N N N1 gang

Resistance N N NNone

E408-100

Power Rating * N N100 Watts

UL Listing

Attenuation Per Step N N1.5dB

Total Attenuation N N N15dB

Insertion Loss N N N.6dB

Plate Size N N N1 gang

Resistance N N NNone

* Continuous ** These units have two steps of 6dB before off position.

Note: Attenuation curve is steeper for a 25-volt line

Architect and Engineer Specifications

AT Series Attenuator(s) shall be Atlas Sound AT Series Model

____ auto transformer or approved equal. The power rating shall be ____ and attenuation range shall be ____ dB. Attenuation per step for AT-____ shall be 8 steps of 3dB and 6dB each for the last two positions. Attenuator shall be a step type control with a positive off position. There shall be no stop between the maximum and off positions (AT Series only). Switch shall have silver plated contacts to eliminate noise and contact loss. All terminations must be made via a removable terminal block. Unit(s) shall be supplied with one of the following single gang face plates to be noted by model number suffix: Standard stain less steel faceplate (with dial scale to indicate attenuator position), Decora style plastic face plate-Ivory color, Decora style plastic face plate-White color. All models are designed to mount in a standard E.O. box.

E408 UL Listed attenuator shall be Atlas Sound Model E408-100 auto transformer or approved equal. The power rating shall be 100W. The at tenuation per step shall be 1.5dB. Unit shall be a step type control with a positive off position. There shall be no stop between the maximum and off positions. Switch shall have silver plated contacts to eliminate noise and contact loss. The attenuator shall be mounted to a standard gang stainless steel wall plate which mounts to a standard E.O. box.

RM Option Attenuator shall be Atlas Sound Model ____ [(AT, E408 (-RM)] or ap proved equal. Face plate shall be replaced by an adhesive matte black poly car bon ate dial scale escutcheon for attachment to a rack mount panel. Escutcheon size shall be 2° SQ.

PA Option Specified AT Series attenuators include a priority relay. Relay shall be an SPDT, 24 VDC type securely mounted to the attenuator assembly wired at the factory. Relay shall include a protective cover.

Atlas Sound

AT Series

Dimensional Specifications Plate Mounted Attenuators

MODEL	A			B		C		D		E
AT10	1/2"	4	2	1/8"	2	3/4"	2	3/4"	1	3/4"
AT10-PA	1/4"		2	1/8"	2	3/4"	2	3/4"	1	3/4"
AT35	1/2"	4	2	1/8"	2	3/4"	2	3/4"	1	3/4"
AT35-PA	1/4"		2	1/8"	2	3/4"	2	3/4"	1	3/4"
AT100	1/2"	4	2	1/2"	2	3/4"	2	3/4"	1	3/4"
AT100-PA	4/2"		2	1/2"	2	3/4"	2	3/4"	1	3/4"
E408-100	4/2"		2	5/8"	2	1/16"	4	9/16"	2	5/16"

WIRING - AT Series

Each terminal will hold up to 2-16AWG stranded wire.

For larger wires or home run situations, a small length of wire and a wire nut are recommended.

Attach wire according to label on terminal black as shown below (Non-PA Models will not have the "VDC+" and "VDC-" terminals).

* Install the unit with the terminal block on top. This will ensure that the off position is on the bottom.

graph TD
    A["Speaker with 70.7V Transformer"] --> B["S/PK +"]
    A --> C["S/PK - +"]
    A --> D["AMP"]
    A --> E["AMP"]
    A --> F["V/D/C"]
    A --> G["V/D/C"]
    H["-PA Models Only"] --> I["-PS 24VDC"]
    H --> J["-70.7V AMP"]

Wiring - (-Pa) Priority Attenuators

Power Switching Req. For - Pa Attenuators