CYNAR, P.J.

Defendant was charged with armed robbery, contrary to MCL 750.529; MSA 28.797, and two counts of criminal sexual conduct in the second degree, contrary to MCL 750.520c(1); MSA 28.788(3)(1). A Detroit Recorder's Court jury found the defendant guilty of armed robbery only, and he was sentenced to a prison term of from 20 to 30 years. Defendant now appeals as of right.

The complaining witness was unable to identify defendant as her assailant, though his fingerprints were found on a green box in her apartment. This inability to identify her assailant occurred because her assailant removed her glasses, which left her unable to see clearly. The prosecution, in order to prove that defendant was the same individual that accosted the complaining witness, utilized the testimony of two other individuals who testified that defendant had previously sexually assaulted and robbed them utilizing the same modus operandi that was used in the present robbery and criminal sexual conduct. This testimony was received into evidence over defendant's objection, the trial court ruling that it was permitted under the similar acts statute, MCL 768.27; MSA 28.1050.

Defendant initially contends that it was error for the trial judge to admit the "similar acts" evidence. He notes that he was acquitted of charges arising out of the incident about which one of the witnesses testified. He further claims that the probative value of the evidence was outweighed by its prejudicial effect.

MCL 768.27; MSA 28.1050 permits the introduction of evidence of similar acts of a defendant "where the defendant's motive, intent, the absence of, mistake or accident on his part, or the defendant's scheme, plan or system in doing an act, is material". In People v Wilkins, 82 Mich. App. 260, 267-269; 266 N.W.2d 781 (1978), a panel of this Court set forth the requirements for admission of evidence under this statute. There must be substantial evidence that defendant committed the act sought to be introduced, there must be some special circumstances of the prior act which tend to prove defendant's plan, scheme, intent, etc., and the defendant's plan, scheme, intent, etc., must be material to the determination of defendant's guilt of the charged offense.

We conclude that these requirements are satisfied in the present case. The two witnesses testified from first-hand knowledge as to defendant's perpetration of the prior acts. The fact of defendant's acquittal on charges arising out of one of the prior incidents does not act to bar its admission. People v Oliphant, 399 Mich. 472, 495-500; 250 N.W.2d 443 (1976). The similarity between these acts and the sexual assault alleged in the present case is striking. In each instance, an elderly woman, living alone in the same area of Detroit, was robbed of money and jewelry, tied to her bed in a spread-eagle position, and sexually assaulted. The materiality of this evidence and its propensity to show a scheme and the disputed identity of the assailant in the present case is obvious.

The question remains, however, whether the probative value of this evidence outweighed its prejudicial effect. Such a determination must be made even if the requirements set out above are met. People v Wilkins, supra, 270.

The record in the present case does not expressly indicate whether the trial judge applied this balancing test when ruling that the evidence was admissible. However, no case to date has required a trial judge to spread this balancing process on the record. If such a requirement is forthcoming, we believe it should come from the Supreme Court. Additionally, we are not willing to presume from a silent record that the trial judge in this case failed to balance these factors.

We further conclude that the probative value of the similar acts testimony in this case outweighed its prejudicial effect. The identity of the assailant was the critical issue at trial. Defendant presented an alibi defense at trial and, because of her poor vision, the complainant was unable to identify defendant as her assailant. Thus, the similar acts testimony was of paramount importance in establishing defendant's identity as the assailant, and its probative value was enormous.

The admission of the testimony concerning prior bad acts or criminal convictions of a defendant will always have some prejudicial effect. However, in the present case, this effect was minimized, as the jury was made aware that defendant had been acquitted of the prior sexual assaults. The jury's verdict, acquitting defendant of the criminal sexual conduct charges, is further proof of the evidence's minimal prejudicial effect.

In light of the above analysis, we conclude that no error occurred in the admission of the similar acts testimony in this case. We have also examined defendant's other contentions of error and find them to be without merit. See People v Duncan, 402 Mich. 1, 15-16; 260 N.W.2d 58 (1977), and GCR 1963, 516.2.

Affirmed.

D.E. HOLBROOK, JR., J., concurs in the result only.