Former GC Store Manager / GO Team / DM here.
This is a perpetual problem in the main room (not the Acoustic room). GC Leases the vast majority of the real estate housing their stores. Some spaces have greater challenges in this regard than others, but the Real Estate Team's buildout (what they give to general contractors building the new stores & revamping the old ones) has always failed to address this issue.
Nearly all GC locations have central, forced air heat, many with no humidification. **In many cases the HVAC system for the store is the property and responsibility of the Landlord, not GC, and GC installs as system for the Acoustic Room alone**Some more astute Store Managers are willing to sacrifice part of their annual operating budget towards store-bought humidifiers, but it takes about a dozen of these to have much effect on these huge rooms.
In many cases the Store Managers are well aware of this problem, and how it affects sales & profitability, but have few options when it comes to correcting the issue. The standard operating procedure in most cases is; if any particular item gets very bad.... or a customer is interested in that item, it goes in the acoustic room for a few days in hopes that will correct the issue, which it often does. When it doesn't often GC will attempt to send the unit back to the manufacturer for a credit and call it unacceptable merchandise.... same as shipping damage. Claims like this were at the root of the beef which eventually caused the split between GC and Mesa Boogie.
My Advice to ANYONE purchasing an instrument from GC:
Every GC has a GC Garage Tech. Some of these folks are very talented, some not so much, but even the least of them qualified to handle a problem like this. Every GC has a humidity-controlled Acoustic Room. Ask that your instrument get a full setup and a few days in the Acoustic room free of charge. They will NOT say no, as long as you pay for the instrument, or put a serious deposit on it.
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