Source: Press Release, Last Accessed: 2024/04/25

The new TAD-C700 incorporates a slew of technical refinements and enhancements to achieve a new level of performance, replacing the TAD-C600, TAD’s critically acclaimed, top-of-the-line preamplifier released in 2011.
The TAD-C700 boasts a high-performance, single-stage current-feedback amplifier in its line amplifier section, while a dedicated output amplifier circuit provided to each of the two line outputs prevents signal branching and interference from connected equipment from deteriorating sound quality.
The C700’ features a balanced circuit topology to achieve an ideal signal path from input to output and a dual-mono construction for maximum symmetry, to provide identical amplification, both electrically and mechanically, to positive and negative signals and to both channels, which results in a near-perfect stereophonic sound reproduction, the company says.
The C700’s power-supply unit is physically separated from the main amplifier unit. This design prevents vibration and magnetic flux leakage from the transformer from adversely affecting mechanical sections and audio circuits of the main unit. To increase the purity of power supply, the internal coil of the transformer is directly connected to the power supply circuit, minimizing the contact points with leading wires. Moreover, terminals for directly connected coils, mounting terminals for motherboards, and clamping screws are all made of oxygen-free copper, coated with nonmagnetic materials. A powerful toroidal transformer with a 400 VA power rating powers the audio circuit to achieve greater signal transition performance. The entire power supply is housed in a rigid cast-aluminum monocoque chassis to suppress unwanted vibrations. The C700’s main amplifier circuit is mounted on a sturdy 33mm-thick sub-chassis weighing 15kg, made from pure aluminum ingots, to achieve vibration control.
TAD’s custom-made electronic volume control circuit boasts ladder-resistance switching that achieves exceptionally precise attenuation performance and an ultra-low distortion of less than 0.0005% at 1 Vrms input. In addition, the power circuit employs TAD’s custom-made electrolytic smoothing capacitors, as well as large-capacity, ultra-low-distortion film output coupling capacitors to achieve a wider low cut-off frequency range.
The C700 is equipped with a dedicated recording output that bypasses the selector circuit to directly output input audio signals. It also has a pass-through mode that outputs input signals from a pre-out jack without changing the signal level. A monitor switch is not available on the C700 to eliminate any chance of switching elements adversely affecting sound quality, the company says.

For more information: https://www.technicalaudiodevices.com/

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