Dynamism of Music invivid reality

Control Amplifier

ATC-7

An amp with multiple control knobs on the front panel, nowagain. The control amplifier that "we wanted and wanted tomake” was such an authentic style amplifier.
Nowadays, all necessary operations for audio equipment areintegrated into a remote control, and it seems that one trend
is to operate via smartphones using WiFi or Bluetooth insteadof infrared. While audio operations are being replaced bytouch panels or mobile devices, Airtight wants to return to thepleasure of accessing amplifier and operating control knobs
directly. Because we remember that manipulating amplifierswith physical feedback was an important aspect of audio
pleasure that being lost. For the control amplifier "ATC-7",
we wanted to re-create the joy of directly manipulating thesound with our own fingers, so we redesigned the knobs,
created a texture that feels right to the touch, and created theideal knurling feel and rotation.
On the other hand, the most important thing for airtightamplifiers is whether the music sounds attractive. We didn't
set a deadline for the development period, we spent as muchtime as needed and used every possible idea. In the power
supply circuit, we have adopted a combination that is not a
standard for audio: an ultrahigh-performance regulated power
supply and a choke coil. The housing is a combination of newand orthodox Bakelite & Steel. We realized the ideal soundthat we envisioned by designing parts, materials, andmechanisms.
The vividness, engraving depth and dignity of the sound thatemerges over the speakers. You can feel the "tame" of themusic, and the dynamism that conveys the vitality of thesound.
The ATC-7 is full of the unique charm that can only beexperienced through audio, and the joy of enjoying music.

Features【Power Section】

Toroidal power transformers with low leakage flux are used for the power supply, which【Front Panel】

is the key to sound. Two transformers, one for high-voltage power supply and the otherfor low-voltage power supply, are installed, and rigidly mounted on the main chassis
by thick pure copper substrates. A high-performance regulated power supply designed
new and exclusively for the ATC-7 reduces effect from flickers on commercial powersupplies, and provides clean and stable power via a high-performance audio signal range
choke coil. In addition, large capacity film capacitor in the decoupling circuit isincorporated. Electrolytic capacitors are eliminated from both the signal and thedecoupling circuits which contributes to the transparency of the sound.
【Input Section】

A Mechanical rotary selector switch which resist to degradation over time is used for
input selector. ATC-7 is equipped with 3 RCA inputs and 2 XLR inputs.

PTFE insulated High-density, high-quality shielded wires are used for the cables fromPresence Control

Gain Trimeach input terminal, minimizing the loss of audio signals and suppressing crosstalk

between the left and right channels. "Presence control", "Bass Compensator", and "GainTrim" are equipped with mechanical rotary switches that provide a nimble operational

Input Selector

Bass Compensator

Operate Switch(Mute)
Main Volume

Pilot Lamp

Power Switch

feel, providing joys of adjusting the sound quality. The Left and Right channels are
configured back to back inside an Inner Chassis which is suspended from top of mainchassis, and a pure copper shielding plate is arranged in between to prevent interference.
For Main Volume, ALPS RK-501 High Quality Volume is incorporatd.

【Rear Panel】【Amplification Section】

This is a 2-stage NF type SRPP (shunt regulated push-pull) consisting of a twin triode
12AX7 and a 12AU7 for each channel. A mirror configuration in which the L/R channel

amplifiers are arranged vertically symmetrically. The amplification section is housed
in a black chrome-plated inner chassis, and printed circuit boards are fixed on a thickpure copper bathtub-shaped substrate insde. The inner chassis is firmly fixed from theceiling of the monocoque chassis via a specially made Bakelite bar.

This bakelite bar provides electrical isolation of the amplification unit from the mainchassis while integrating resonance.

The front panel is made of 15mm thick aluminum cut with an NC lathe, and the surface
is anodized. Equipped with a timer relay circuit when the power is turned on, even whencombined with a solid-state power amplifier, noise is not generated when the power isturned on.

Power Connection

Fuse

Outout Terminal (RCA）XLR Input Terminal

RCA Input Terminal3 types of Control Features
1. Presence Control：You can control the high frequencies of the musicalsource, the nuances of the instrument, and the character of the recordingby gain trim upper limit of audible frequency (Around 20kHz). In addition,
the change in the energy balance in the ultra-wide area affects the sense ofsound field and the nuances of the space, allowing user for fine tuning oflistening environment.
2. Bass Compensator ： Help to compensate frequencies below 100Hz
when listening at small volume, or lack of lows in input source.
3 . G a i n T r i m ： Gain of amplifier can be adjusted in 1dB increment
independently for Left & Right channel.

Control Charactristics

15Responses（dB）

1050A & M LIMITED-5

airtight-anm.com-10-15110100

1K10K100K

Frequency (Hz）【Specifications】
Tube incorporated : 12AX7×2, 12AU7×2

Input : 5 channels (RCA×3/XLR×2) Unbalanced
Input Impedance : 100kΩ (gain19dB)

Output : RCA×2 Channels (XLR unbalanced as option)

Output Impedance/ (Recommended Load : Total>47kΩ)
THD : 0.02% (1V/1kHz)

Output Voltage : 20V (load 100kΩ/1%THD)

Frequency Response : 10Hz~100kH (z -1dB)
Power Consumption : 50VA

Dimensions : W400mm×D350mm (including knobs)×H145mm
Weight : 13.5kg

1-20 demaru-cho, Takatsuki-shi, Osaka, Japan Tel:072-668-1760