For the first time in LTA’s lineup, the Century Monoblocks utilize a screen-driven output stage within the ZOTL topology. EL84 pentodes steer the screen grids of NOS 6JN6 beam power tubes, enabling efficient pentode operation while maintaining the linearity and fluidity associated with triodes. This arrangement results in fast, detailed reproduction with outstanding depth—uncolored and effortless.

Conventional tube amplifiers can struggle with complex impedance or capacitive speaker loads, often leading to shifts in frequency response and diminished control. The Century Monoblocks overcome these limitations with inherently low output impedance and wide bandwidth. Their transformerless architecture eliminates the hysteresis, phase shifts, and frequency-dependent distortions typical of transformer-coupled designs, delivering the speed and grip of transistor electronics while preserving the dimensionality and holographic soundstage that define great tube amplification. The result is effortless authority and control, even with demanding crossovers and full-range panels.

Each Century amplifier is hand-built in Maryland, using components selected for sonic purity and musicality. Non-magnetic resistors, custom ferrite-core impedance converters, and a minimalist signal path contribute to a stunningly realistic presentation. Voicing is refined through extensive listening sessions, and casings utilize non-magnetic aluminum with comprehensive Faraday shielding for optimal noise rejection.

The Century Monoblocks build upon Berning’s Quadrature Z heritage, delivering lower noise, enhanced stability, and modern convenience. Features include auto-biasing, global voltage compatibility (100-260 VAC), built-in protection circuits, adjustable global feedback, and cool-running tubes for long-term reliability. The amplifiers are notably light due to the absence of output transformers.

Inputs: XLR and RCA, with all amplification stages balanced

Power Output: 110W into 8 Ω / 144W into 4 Ω @ 1% THD

Burst Output: 178W (8 Ω) @ 1% THD, 196W (4 Ω) @ 2% THD

Topology: Fully differential, ZOTL Push Pull Class AB with new Screen Drive and Pentode driver control system

Tubes: 4 × NOS 6JN6 Compactron beam power pentodes per channel, 2 × EL84 pentode drivers, 2 × 7062/E180CC and 1 × 12AU7 input and gain stage

Construction: Dual monoblock chassis, non-magnetic aluminum casework, full Faraday cage shielding

Adjustable Feedback: Front-panel selector for LOW/MED/NORM settings

Components: Non-magnetic resistors, boutique capacitors, advanced ferrite impedance cores, dual binding post outputs to support bi-wiring, and rear panel GND post

Features: Auto-biasing, automatic voltage selection, built-in current and DC offset protection, low heat output, 3400V peak-to-peak power tube voltage swing, ~ 1 Farad storage capacitance, 3 times tube life

Frequency Response: 8 Ω: LOW:   1.2Hz to 50kHz (+0/-3dB), 3Hz to 20kHz(+0/-0.5dB); MED: 1.3Hz to 89kHz  (+0/-3dB), 4Hz to 60kHz(+0/-0.5 dB) ; NORM:   1.3Hz to 90kHz (+0/-3dB), 4.5Hz to 90kHz( +0/-0.5 dB)

Input Impedance: RCA: 20k (LOW), 26k (MED), 47k (NORM); XLR: 28k (LOW), 36k (MED), 94k (NORM)

Output impedance: 0.85 Ω (NORM), 2.1 Ω (MED), 5.6 Ω (LOW)

Power Requirements: 100-260 VAC, 50-60 Hz, power factor corrected

Size: 18.5” Wide, 5.5 inch Tall, 19” Deep

Weight: 26.5 lbs (12 kg) each