Monarchy Audio SM-70 pro
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| Condition | |
| Payment methods |  |
| Ships from | San Francisco, CA, 94127 |
| Ships to | United States |
| Package dimensions | 16.0" × 17.0" × 8.5" (23.5 lbs.) |
| Shipping carriers | USPS, UPS or FedEx |
| Shipping cost | Log in to see price |
| Original accessories | Box, Manual |
 Average | Research Pricing |
I am the original owner of this power amplifier. It was run as one of a pair of monoblocks for 5 years and its sister died (opted to try some different amps and loved them). With a flip of a switch, it can also act as a stereo amp. Rated at 25 W (8 Ohms)/40 W (4 Ohms) per channel in stereo and 70 W (8 Ohms)/140 W (4 Ohms) in bridged mode (mono). Looking at it I believe it is a class A amp. This is the "C" revision if you want to pair it.
In my hands, they did have a slight hum (barely audible with my ears up against the speakers) even with a ground lift, but I never found it disruptive. The "hum" is common for this amp, the manufacturer even suggests in the manual that the amps be floated from ground if it is an issue. You'd also see some reviews online mention it.
Questions for the seller |
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| I mean what speakers you runs with them and you hear some humm? By a slight hum I mean that if I put my ears right next to the speakers with no music playing, but my preamp on, I hear the slightest electronic hum. It was barely audible and when playing music even less so. It was the same when I lifted the ground on the main power with a cheater plug to float ground on the amps.
The speakers I use are 20 year old Castle Severn 2 floor standing speakers. They were good speakers for the time. They were wired to the power amps running as mono blocks, bi-wired into each crossover. I replaced the SM-70 Pro blocks with two Schiit Aegir amps. They are lovely replacements and I hear no audible hum. |
| What speaker you RNs it with them and hear some him? Answered in your previous question. |
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Item can be returned within 7 days of receipt.
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Items must be returned in their original condition, with all included packing materials and no signs of use. Buyer assumes responsibility for all shipping return costs unless the item was not received as described.
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