Manley Labs MAHI Tube Monoblock Amplifiers
MAHI power amplifiers offer a compact monoblock solution with an almost intimidating level of punch.
Features
- Sold / priced as pair
- Switchable between Triode and Ultra-Linear operating modes
- ALL-TUBE circuit design
- MANLEY IRON® output transformer designed and hand-wound at Manley Labs
- Variable Feedback switch
- 1x 12AT7EH large plate input tube per block
- 1x 12BH7EH driver tube per block
- 4x EL84 output tubes
Sold in pairs, each MAHI dishes up 20 Watts when in TRIODE mode and 40 Watts when set to Ultra-Linear. MAHI’s power is delivered from a 4-way configuration of EL84 (or 6BQ5) tubes driven by a 6414 dual triode driver in concert with a 12AT7EH input dual triode. EL84 is a highly revered tube for Manley Labs over many years, favoured not only for its long life and consistent performance; but also its delightful quickness both in the top and bottom end.
By harnessing a large B+ rail storage, MAHI yields up to 115 joules of energy for better control, better impact and better bass punch from its transformers - each custom engineered and wound at Manley Labs US manufacturing facility. To offer a more customised performance, a variable feedback switch is also available for users to tune the sonic palette from intimately seductive to all-out rock and roll.
Snappy Heritage
As fans of the Manley brand will recognise, MAHI takes a number of design cues from the 2002 SNAPPER amplifier model. While both models share aesthetics in their chassis design, both also feature the hugely popular TRIODE-UL switch for triode ultra-linear mode switching as well as top-shelf German-made WBT binding posts.
Despite its size and affordable price, MAHI delivers a remarkable level of power as a formidable cornerstone to any appropriate system.
Specifications
- Input Impedance: 110 kOhm
- Negative Feedback: MIN= 3dB; STD=6dB; MAX=10dB
- Gain: 28.5 dB TRIODE; 29.1 dB UL (FB STD)
- Input Sensitivity: 312mV TRIODE; 340mV UL (FB STD)
- Max Output: 27W TRIODE; 42W UL @ 5 ohms (FB STD)
- Signal to Noise: 82 dB A-WGT 20-20K
- Noise Floor: 150µV (-74dBu A-weighted)
- Dynamic Range: 83dB
- THD+N: < 0.15% @ 5W
- Frequency Response: 20 Hz to 20 kHz flat (full power, UL mode)
- Speaker Load: Optimized for 5 Ohms (recommended)
- Output Impedance: 1.47 Ohms TRIODE; 1.67 Ohms UL (FB STD)
- Damping Factor: 5.45 TRIODE; 4.78 UL (FB STD)
- Dimensions: 280 x 254 x 127mm, 8.16kg (each)
