Rotel Michi M8 monoblock power amplifier Specifications

Sidebar 1: Specifications

Description: Solid state, mono power amplifier. Inputs: 1 balanced (XLR), 1 single-ended (RCA). Outputs: 2 pair custom binding posts. Input impedance, balanced (XLR): 100k ohms; single-ended (RCA): 12.5k ohms. Output impedance: not specified. Voltage gain, balanced (XLR): 30dB; unbalanced (RCA): 34dB. Frequency response: 20Hz–20kHz, –0.15dB; 10Hz–100kHz, –0.5dB. Input sensitivity, balanced (XLR): 3V; unbalanced (RCA): 1.85V. THD: <0.018%. Damping factor: 200. Speaker impedance: 4 ohms, minimum. S/N ratio (A-weighted): 120dB. Continuous output power: 1080W into 8 ohms (30.3dBW), 1800W into 4 ohms (29.6dBW). Power consumption: 1200W. Standby power consumption: Normal: <0.5W, Network wakeup: <2W.
Dimensions: 19" (485mm) W × 9.375" (238mm) H × 18.25" (465mm) D. Weight: 130.3lb (59.1kg) each.
Finish: Gray anodized aluminum with black acrylic front panel.
Serial numbers of units reviewed: 256-9441092, 256-9511006. Designed in Japan, built in China.
Price: $13,999/pair. Approximate number of US dealers: 14. Warranty: 5 years parts and labor.
Manufacturer: The Rotel Co. Ltd., Tokyo, Japan. Web: US distributor: Sumiko, 6655 Wedgwood Rd. N, Suite 115, Maple Grove, MN 55311-2814. Tel: (510) 843-4500. Web:

The Rotel Co. Ltd.
US distributor: Sumiko
6655 Wedgwood Rd. N, Suite 115
Maple Grove, MN 55311-2814
(510) 843-4500

Anton's picture

It seems they punch above their weight, so to speak!

Not in my budget, but if they were, I'd be racing out the hear them.

They seem like a cool benchmark product, did they go back or are they sticking around for more comparisons?

Really, a pretty exciting product.

Added: JA1's measurement section was also pretty darned interesting. Just don't let Golden Sound get hold of these. ;-D

Ortofan's picture

... the measured output power at clipping was 1322W @ 8Ω and 2250W @ 4Ω.
They also made instantaneous peak power measurements which resulted in outputs of 1640W @ 8Ω, 3130W @ 4Ω, 1790W @ 2Ω, 960W @ 1Ω.

They also tested the S5 two-channel version ($7K) and the measured output power at clipping was 670W @ 8Ω and 1170W @ 4Ω.
Instantaneous peak power measurements were 691W @ 8Ω, 1390W @ 4Ω, 1780W @ 2Ω, 902W @ 1Ω.

georgehifi's picture

"Also on the back panel is this warning:" "Speaker impedance 4 ohm minimum." Uh oh: According to John Atkinson's measurements, the Wilson XVX "remains between 2 and 4 ohms for almost the entire audioband," with a minimum value of 1.5 ohms between 310Hz and 340Hz. He concludes, "The Chronosonic XVX should be used with amplifiers ... that don't have problems driving loads of 2 ohms and lower."

Doesn't mean they will sound crap, just won't get the "very best" out of them at those impedances, like say a Gryphone Antillion will. Which supposedly doubles down to 1ohm.

Cheers George