The Neo-Classic 500W offers selectable Triode and Ultra-Linear operating modes, each optimized for specific performance priorities. Triode mode delivers 200 watts with enhanced harmonic richness and three-dimensional soundstage depth characteristic of triode-connected output stages. Ultra-Linear mode provides 470 watts of output power with maximum dynamic capability, extended bass control, and the headroom required for complex orchestral passages and high-SPL reproduction. This mode flexibility enables precise matching to both musical material and loudspeaker requirements.
Neo-Classic 500W
Neo-Classic 500W
High-power monoblock with switchable topology
- 470W monoblock output from ten KT90EH vacuum tubes in push-pull configuration
- Switchable Triode (200W) and Ultra-Linear (470W) operating modes
- High-capacity power supply delivering exceptional dynamic response and bass authority
- Balanced XLR and unbalanced RCA inputs with Manley IRON® input transformer
Experience the Manley Neo-Classic 500W, reference-level tube amplification
The Manley Neo-Classic 500W Monoblock represents the pinnacle of push-pull vacuum tube power amplification, delivering 470 watts of continuous output for commanding control over demanding loudspeaker systems. Utilizing ten KT90EH output tubes per channel in a push-pull configuration, this monoblock combines exceptional power reserves with the tonal accuracy and dimensional imaging that characterize high-performance tube amplification. Hand-assembled in California with custom-wound Manley IRON® transformers, the Neo-Classic 500W provides both technical excellence and musical refinement.
Advanced power supply architecture for dynamic authority
The amplifier's power supply employs high-capacity reservoir capacitors for instantaneous energy delivery during transient peaks and sustained low-frequency demands. This robust supply architecture ensures controlled bass response and dynamic impact across the full power bandwidth. Custom-wound Manley IRON® output transformers, continuously refined through in-house development, maintain wide bandwidth with low distortion while providing proper impedance matching and exceptional damping control throughout the audio spectrum.
Intelligent operation modes with accessible maintenance
The Neo-Classic 500W incorporates Soft-Start circuitry to minimize inrush current during power-up, extending component longevity and reducing mains stress. Ever-Warm standby mode maintains tubes at optimal operating temperature with minimal power consumption, ensuring the amplifier remains ready for immediate full-power operation. Bias adjustment controls and measurement points are conveniently accessed behind the front panel, simplifying routine tube maintenance and ensuring sustained performance over extended service intervals.
Full Power (UL)
470 W @ 1.5% THD into 5 Ohms
Full Power (Triode)
200 W @ 1.5% THD into 5 Ohms
Output Tubes
10 x KT90EH (per monoblock)
Frequency Response
10 Hz - 30 kHz (Triode, -1 dB)
Dynamic Range
110 dB A-WGT
Inputs
Balanced XLR (Transformer) & Unbalanced RCA
Frequently Asked Questions
The primary advantage of the monoblock design is the ultimate separation of channels. Since each speaker is powered by its own entirely independent chassis and massive power supply, there is zero crosstalk or electrical interference between the left and right channels. This results in superior stereo imaging, a more accurate soundstage, and improved dynamics, as each channel has immediate access to its full, dedicated power reservoir for transient response.
The selectable modes provide two distinct sonic characteristics. Triode mode (200W) delivers a musical, three-dimensional, and emotionally rich sound with greater mid-range liquidity. Ultra-Linear (UL) mode (470W) delivers significantly higher power and lower measured distortion, resulting in a faster, tighter, and more controlled sound with superior bass impact and dynamic brawn.
With 470 watts of output power, the Neo-Classic 500 Monoblocks are capable of driving virtually any loudspeaker, including those with very low-sensitivity or challenging impedance curves. Unlike lower-wattage tube amps, the sheer power and high current capability of the 500 Monoblocks ensure massive dynamic range and authoritative bass impact, even with the most demanding speaker loads.
The EVER-WARM mode is a standby function that keeps the amplifier's tubes warmed up at half-voltage when not in use. This minimal power consumption mode is designed to ensure the amplifier can reach its peak sonic potential much faster when fully engaged, while also minimizing the initial high in-rush current (SOFT-START) during power-up, which increases the longevity of the tubes and internal components.
Manley recommends checking the bias settings on the output tubes periodically, typically every few months, and especially when installing new tubes. The Neo-Classic 500 makes this essential maintenance easy with convenient, external bias measurement points and individual adjustment trimpots concealed on the front panel.
No, the Manley Neo-Classic 500W Monoblock is a dedicated power amplifier. It requires an external preamplifier or a source component with a variable output level (such as a DAC or CD player) to control the input signal and volume. It features both unbalanced RCA and balanced XLR inputs for connectivity with a wide range of source gear.
Couldn't find the answer you're looking for?
Check out our Help Center
