McIntosh MC-250 (1961–1971)

Fifty watts a side, a chrome chassis borrowed from a tube amp, and the Autoformer. McIntosh's first solid-state power amp is a sleeper of the early transistor era.

Overview

Fifty watts per channel into 8 ohms, or 100 watts bridged to mono. Those are modest numbers, but the MC-250's story is the output stage behind them. This is a first-generation McIntosh solid-state amplifier, built from 1961 to 1971, and it carried the company's Autoformer technology into the transistor age instead of dropping it. Most early solid-state designs coupled directly to the speaker and lived or died by the load. The MC-250's autoformers let it deliver full rated power at 4, 8, or 16 ohms - each tap fully rated, not just the 8-ohm one. The 16-ohm tap even supplies 25 volts RMS for constant-voltage use.

Physically, it's a transitional piece. McIntosh built the MC-250 on a chassis similar to the MC240 tube amplifier, so it has a chrome chassis with the bends and edges that define the look. It's tube-era styling wrapped around silicon. Owners describe it as retaining "the wonderful McIntosh sound without tubes," which is the kind of claim every owner makes about every amp. At 36 pounds it's no featherweight, though it's a good deal lighter than the tube amps it resembles.

The historical record on this one is thin. The MC-250 is largely absent from the major audio magazines of its own era - no lab reports, no review features. What survives is a service manual covering serial numbers 23L48 and up, a scattering of owner accounts, and a single classified listing in Audio (December 1987, p.169) where a used MC-250 was offered at $299 alongside an MX-112, an MX-110, and an MC-225. That listing is the clearest period evidence of where the amp sat in the used market a decade and a half after it left the catalog.

Key Features

Autoformer Outputs Across 4, 8, and 16 Ohms

The Autoformer is the defining engineering choice. Output taps are provided for 4-, 8-, and 16-ohm loads, and full rated power output is available at each tap. It's not a compromise rating that only holds at one impedance. The Autoformer matches the amplifier to the load rather than asking the load to match the amplifier. That flexibility helps with vintage speakers that have odd impedance curves. The 16-ohm tap's 25-volt RMS constant-voltage capability hints at the professional and installation uses McIntosh had in mind.

Fifty Watts Stereo, One Hundred Bridged

Rated at 50 watts per channel into 8 ohms in stereo, doubling to 100 watts into 8 ohms in mono. On paper that's a small amplifier. With the autoformer delivering full power into low-impedance loads and the conservative McIntosh rating philosophy behind it, owners tend to describe it as more capable than the number suggests. One dissenting voice from a Russian hi-fi forum argues the 250 isn't powerful enough for ATC SCM 20T monitors and needs an active preamp to come alive. It's a first-generation solid-state design, not a modern high-current amp.

Chrome Chassis in the Tube-Era Mold

Built on a chassis similar to the McIntosh MC240 tube amplifier, the MC-250 wears a chrome chassis with the bends and edges that come with it. It looks like the tube amps around it while being something else entirely. Look closely at the chrome. Bends, edges, and scratches are where condition shows first, and rechroming is not a casual proposition.

Historical Context

The MC-250 was McIntosh's first-generation solid-state power amplifier, manufactured from 1961 to 1971, a full decade that spans the company's transition from tubes to transistors. Its exact place in the lineup is unclear. It sits somewhere between the classic tube models (MC-30, MC-60, MC-225) and the later solid-state era (MC-2105, MC-2300), and the surviving documentation does not establish a clean lineage in either direction. The absence of major-magazine coverage from its own era has led some to speculate it was a short-lived model or a regional offering, though the ten-year production run argues against "short-lived." Treat the lineup question as open. It is a distinct model from the later MC-2500. The names are close enough that listings and forum threads routinely confuse them, and the two should never be conflated.

Collectibility & Value

Prices are all over the map, which is what happens to a model with a thin paper trail. A used example fetched $299 in a 1987 Audio classified. An owner writing in 2008 reported buying one at a local record store for $325. A 1970s black-and-chrome example was listed at $1,325 on Reverb in January 2026. A restoration kit for filter capacitor repair was offered at $195.

On condition: one long-term owner noted all components were original except the power supply diodes. Listings routinely advertise units as "recapped, fully functional" or "100% original and operational, never modded." Originality matters to collectors, but a first-generation solid-state amp from the early sixties is old enough that tired electrolytics are a real consideration. A service manual covering serial 23L48 and up exists and turns up on the secondary market. Documented failure patterns are scarce, so budget for a competent tech's once-over rather than assuming a specific fault.

eBay Listings

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.

Related Models

• McIntosh MC1.25KW Power Amplifier (2001)
• McIntosh MC2KW Ultimate Flagship Amplifier (Unknown)
• McIntosh 240
• McIntosh MC-2125 (1976–1981)
• McIntosh MC-2205 (1975–1981)
• Accuphase P 370
• Accuphase p300 (1973)
• Accuphase PE-2217
• Accuphase PS-1200
• Accuphase PS-500