Specifications

4
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Fax
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NET 30
Terms
Professional
Audio
section
4
Speaker Line Matching Transformers
Line transformers adapt conventional 8ohm speakers for use with multi speaker commercial
systems. This wide range of models, from Atlas Sound, meet today’s high performance quality
standards in a variety of applications. All models include 6" color–coded leads for primary and secondary
connections, except #555-6805, which has solder lugs.
Power Primary Primary Secondary Frequency Insertion
Order # Capacity Volts Taps Taps Response Loss (1–3) (4–up)
555-6801 4 watts 70.7 0.5W, 1W, 2W, 4W 8Ω 60Hz~12KHz ±1dB 1.0dB $15.79 $14.68
555-6802 8 watts 70.7 1W, 2W, 4W, 8W 4Ω, 8Ω 50Hz~15KHz ±1dB 0.6dB 20.95 19.46
555-6803 16 watts 70.7 4W, 8W, 16W 4Ω, 8Ω 40Hz~15KHz ±1dB 0.6dB 42.50 39.40
555-6804 32 watts 70.7 8W, 16W, 32W 4Ω, 8Ω 30Hz~15KHz ±1dB 0.6dB 60.50 56.14
555-6805 60 watts 70.7 2.5W, 5W, 10W, 4Ω, 8Ω, 16Ω 60Hz~20KHz ±1dB 0.5dB 28.50 26.52
20W, 40W, 60W
555-6806 4 watts 25.0, 70.7 0.25W, 0.5W, 8Ω 100Hz~10KHz ±1.5dB 1.5dB 7.75 7.20
1W, 2W, 4W
#555-6801
#555-6802
#555-6803
#555-6804
#555-6805 #555-6806
Wall Volume Controls for 70V Systems
These transformer based volume controls provide zone or individual speaker volume
control in 70V distributed audio systems. Stainless steel wall plate with silk screen
dial scale and black knob with white inlay pointer, matches conventional commercial
installation style. Precision wound, laminated core transformers are vacuum
varnished, for silent, efficient operation. Detachable phoenix style connector allows
easy pre–wiring and installation. All models will fit in a standard single gang
electrical box (not included), and are UL listed.
Power Total
Order Model # Rating Attenuation/Step Attenuation (1–3) (4–up)
555-7340 AT10 10W 3dB 33dB $17.95 $16.74
555-7341 AT35 35W 3dB 27dB 19.95 18.49
555-7342 AT100 100W 3dB 27dB 25.95 23.95
In-Wall 70V Volume Controls
12-position rotary monaural control provides local
volume adjustment in multi speaker applications,
where speakers utilize 70V line transformers.
Available as single gang steel plate or decora style,
all units are shipped as white, with ivory plates and
knobs included for easy color conversion. Stainless
steel version is natural steel color, labeled 0~10 with
black numerals, and includes a black ABS knob,
with white pointer. Detachable terminal strip greatly
eases installation, and will accept up to 14AWG wire.
May be mounted in a single gang box or low voltage
bracket Specifications: •Power capacity: 35W/100W
RMS/program •Frequency response: 35Hz~20KHz
•Attenuation: -34~0dB, in 12 steps
Order Description (1-3) (4-9) (10-up)
555-125 Ivory/white decora style plate $19.95$18.50 $16.25
555-130 Ivory/white standard plate 19.95 18.50 16.25
555-135 Stainless steel plate 17.95 16.50 14.45
Speaker Line
Matching Transformers
Line transformers adapt
conventional 8ohm
speakers for use with multi
speaker commercial systems.
High efficiency design provides
insertion loss of less than 0.6dB,
with frequency range of
50Hz~15KHz. A single unit is
compatible with both 70.7V and 25V systems, for
greater flexibility, and models are available with 10W
and 30W RMS capacity. Secondary impedance is
8ohm. Primary taps: •10W model: 0.63W, 1.25W,
2.5W, 5W and 10W •30W model: 5W, 10W, 15W, 20W
and 30W
Order # Capacity (1-9) (10-24) (25-up)
555-7120 10W RMS $4.39 $3.79 $3.35
555-7125 30W RMS 12.95 10.95 9.79
70.7 Volt
Line Output
Transformer
These heavy-duty
high power line
matching transformers
adapt 4ohm or 8ohm
speaker outputs from
conventional audio equipment, to 70.7V for use with
public address speaker systems. •Frequency response:
40Hz~20KHz Primary taps: •4ohm •8ohm
Secondary tap: •70.7V
Power Capacity Dimensions
Order # (RMS) (H) x (W) x (D) (1-2) (3-up)
555-6451 100W 3
1
⁄
8" x 3
3
⁄
4" x 3
1
⁄
4" $39.95 $35.95
8" Public Address Speakers
MCM Custom Audio provides a wide range of ceiling speakers to suit most commercial paging and background music
requirements. Their standard 8" size and good frequency response also makes them ideal full range replacement drivers
in low cost speaker enclosures. #555-6381 feature moderate power capacity and are ideal for most background and paging
situations. High efficiency, high reliability and low cost make these the contractors choice, especially in systems requiring large
numbers of speakers. When wider frequency response is important, #555-6386 feature two-way design, providing highs up to
20KHz. For more demanding foreground music applications, #555-6390/6391 feature a large 17 oz. magnet and treated cloth
surround, providing 60W peak power capacity and increased bass response. All models are available as standard 8ohm or with
a pre mounted 70V/25V transformer. Each is compatible with standard ceiling baffles (#50-150), T-bar supports (#80-1350) and
surface mount wall baffles (#555-915).
8" Heavy-Duty Two–Way Speaker
•Power capacity: 30W/60W RMS/peak •Frequency response: 40Hz~20KHz
•Magnet weight: 17.7 oz. •Treated cloth surround •Tweeter size: 2" •Voice coil
diameter: 1.25" •Sensitivity: 88dB •Optional transformer: 30W •Transformer
taps: 10W, 15W, 20W and 30W •Note: #555-6391 includes a large backplate
mounted transformer which requires additional mounting space. Overall
depth: 5
3
⁄8"
Order # Transformer (1-3) (4-9) (10-up)
555-6390 No $14.95 $13.88 $12.30
555-6391 Yes 18.50 16.83 14.89
8" Two-Way
Speakers
•Power capacity:
10W/20W RMS/peak
•Frequency response:
50Hz~20KHz •Magnet
weight: 10 oz. •Tweeter size:
2" •Voice coil diameter: 1"
•Sensitivity: 86dB •Transformer taps:
0.63W, 1.25W, 5W and 10W
Order # Transformer (1-3) (4-9) (10-up)
555-6386 Yes $14.95 $13.88 $12.30
8" Dual Cone
Speaker
•Power capacity:
10W/20W
RMS/peak •Frequency
response: 50Hz~16.5KHz
•Magnet weight: 10 oz. •Voice
coil diameter: 1" •Sensitivity:
86dB •Optional transformer:
10W •Transformer taps: 0.63W, 1.25W, 5W and 10W
Order # Transformer (1-3) (4-9) (10-up)
555-6381 Yes $9.99 $9.43 $8.37
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