Copland Amplifiers
CTA 407
The flagship. Pure valve. Pure music.
The CTA 407 is Copland's flagship integrated valve amplifier — four KT88 beam tetrodes in push-pull ultra-linear mode, delivering 2 × 50 W of high-biased Class A/AB power through three custom toroidal transformers. A pair of 12BH7 driver tubes and a single ECC83 phase-splitter complete the all-valve signal path from input to output transformer. The fully automatic bias system accepts any valve from the 6550/KT88/KT100/KT120/KT150/KT170 family without manual adjustment, and a multi-colour LED diagnostic display shows each tube's health at a glance. Five line inputs, a built-in RIAA MM/high-output MC phono stage, motor-driven volume control, and switchable speaker outputs make the CTA 407 a complete system hub. Designed and hand-assembled in Denmark.
At a Glance
●4× KT88 push-pull ultra-linear
●2 × 50 W Class A/AB
●Accepts KT88–KT170 valves
●Auto-bias with LED diagnostics
●3 custom toroidal transformers
●MM/MC phono stage
●10 Hz – 150 kHz bandwidth
●Handcrafted in Denmark
Key Features
4× KT88 Push-Pull Ultra-Linear
Two pairs of KT88 beam tetrodes in push-pull ultra-linear mode — high-biased Class A/AB delivers most of its 50 W per channel in pure Class A for extraordinary tonal richness.
Universal Valve Compatibility
Auto-bias accepts KT88, 6550, KT100, KT120, KT150, and KT170 output valves — roll tubes freely to tune the sound, with LED diagnostics showing valve health.
Three Custom Toroidal Transformers
Dedicated power and output transformers — custom-wound for Copland — provide clean, isolated power with wide bandwidth and exceptional dynamic reserves.
MM/MC Phono & 5 Line Inputs
Built-in RIAA phono stage for moving-magnet and high-output moving-coil cartridges, five line inputs with tape monitor loop, and motor-driven volume control.
Technologies Inside
Push-Pull Valve Output
Class A/AB purity from KT88, KT150, and beyond.
The CTA 407 runs pairs of KT88 beam tetrodes in push-pull ultra-linear mode with high-biased Class A/AB operation — most of its power is delivered in pure Class A. Three custom toroidal transformers provide isolated, ultra-clean power. The auto-bias system accepts any valve from the 6550/KT88/KT100/KT120/KT150/KT170 family without manual adjustment, letting you roll valves freely and tune the sound to your taste.
Automatic Bias & Diagnostics
No matching. No fuss. Full visibility.
Every Copland valve amplifier features fully automatic biasing — the circuitry measures and adjusts bias current for whatever output valves are fitted, without any manual intervention. The CTA 407 adds a multi-colour LED diagnostic display: blue and green indicate healthy operation, orange signals increasing wear, and red means replacement is due. Swap valves in seconds, not hours.
Gallery
A closer look at the CTA 407.
More in Copland Amplifiers
Experience the CTA 407
Visit our showroom for a personal demonstration. Hear the difference for yourself.
For complete specifications and technical details, visit the official Copland website.