This dispute involves musical compositions performed in the off-Broadway production of the play “Quien Mato a Hector Lavoe?” 1 (the “Play”) and subsequently in San Juan. Appellants Latin American Music Co., Inc. and Asociación de Compositores y Editores de Música Latino Americana, Inc. claim that they own copyrights in several of the songs used in the Play. They sought a prehminary injunction or temporary restraining order to prevent any further performances of the Play by appehees, the Play’s producers and directors. The district court denied both the temporary restraining order and the prehminary injunction.

In order to demonstrate entitlement to a prehminary injunction, appel *42 lants must show that: (1) they will suffer irreparable injury absent the injunction; (2) the injury will outweigh the harm imposed on any defendant if the injunction is granted; (3) they are likely to succeed on the merits of the case; (4) the injunction does not adversely affect the public interest. Planned Parenthood League of Mass. v. Bellotti, 641 F.2d 1006, 1009 (1st Cir. 1981). 2 The district court correctly stated this four-factor test, but denied the motion for a preliminary injunction based solely on appellants’ failure to meet the irreparable injury factor.

Under the ordinary four-prong test, it would normally be sufficient for the district court to deny the preliminary injunction on the ground that regardless of the likelihood of success, there was no threat of irreparable injury, the injunction was likely to damage the party subject to it, and that the party seeking the injunction could be made completely whole through damages if it prevailed.

However, in copyright cases, “irreparable harm is usually presumed if likelihood of success on [a] copyright claim has been shown.” Concrete Mach. Co. v. Classic Lawn Ornaments, Inc., 843 F.2d 600, 611 (1st Cir. 1988). This in no way requires a district court to shut down a play on the eve of production where, as here, there may be considerable doubt about the strength of the copyright claims and some doubt about the timeliness of the request for a preliminary injunction. But in the face of an apparent threat of new productions continuing over a substantial period, it seems to us insufficient under Concrete Mach. Co. simply to say that damages will redress any and all harm.

The copyright claims in this case are complicated, and nothing we say is intended to suggest a view that plaintiff is likely to prevail, although this is likely to be the key issue as to injunctive relief. Further, we do not know what intervening developments have occurred as to play performances (planned or actual) or as to the conduct of litigation since the denial of temporary relief. Under the circumstances, we merely vacate the denial of the preliminary injunction and remand for further proceedings, including appropriate finding, under Fed.R.Civ.P. 52(a)

It is so ordered.