Musical Concepts M-110SN (1984–1986)
A note on the filing: the archive indexes this model under "Concept," but every period source that mentions it calls it a Musical Concepts product. The M-110SN was not a standalone component at all. It was a modification kit for the Hafler DH-110 preamplifier. The "Concept" listing appears to be a filing artifact of "Musical Concepts."
Documentation is thin, and nearly all of it comes from the manufacturer's own classified advertising. The November 1984 issue of Audio (p.147) carried the first ad in our record. It says a Musical Concepts modification "will elevate your Hafler DH-110 to reference quality," and prices it at $155 as a DIY kit or $230 installed. By June 1986, Audio (p.173) was still running an ad for the M-110SN (Hafler DH-110), calling it "highly regarded by both The Absolute Sound and Audio." That praise is the vendor's claim, not an independent review. No measured test of the M-110SN has surfaced in the archive.
The known facts are few:
- Aftermarket modification for the Hafler DH-110 preamplifier, sold by Musical Concepts.
- Offered as a kit ($155) or factory-installed ($230) as of November 1984.
- Still advertised as available into mid-1986, with claims of "tubelike" sound qualities that are marketing copy, not measured performance.
- No technical specifications — circuit changes, parts used, or measured performance — are documented anywhere in the surviving record.
The M-110SN is a representative of the 1980s "hot-rod the Hafler" aftermarket, but almost nothing technical is known about it. If you own one, or have an original Musical Concepts instruction sheet, the archive would like to hear from you.
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